javascript js WebGL WebGL2 后期处理特效之点击水波纹涟漪例子

先来看结果图(转.gif掉帧了):

完整源码分享网址: https://share.weiyun.com/Vpkp5KP3

1 首先初始化用到的所有图片:

 1 const images = [
 2     "./img/girls.jpg",
 3     "./img/ball.png",
 4     "./img/water.jpg", 
 5     "./img/spriteX8.png",
 6 
 7     //8张雪碧图, 在main()中合成一张图
 8     "./img/sprites/0.png",
 9     "./img/sprites/1.png",
10     "./img/sprites/2.png",
11     "./img/sprites/3.png",
12     "./img/sprites/4.png",
13     "./img/sprites/5.png",
14     "./img/sprites/6.png",
15     "./img/sprites/7.png",
16 ]
17 
18 { //init images
19     let len = 0;
20     for(let i = 0; i < images.length; i++) {
21         const image = new Image();
22         image.onload = () => {
23             if(len++ === images.length - 1) main();
24         }
25         image.src = images[i];
26         images[i] = image;
27     }
28 }

2 初始化渲染器

1 const renderer = new Renderer();
2 renderer.setSize();
3 document.body.appendChild(renderer.domElement);
4 console.log(renderer);

3 先往渲染器里面丢一个背景

const background = new Object2D(new GeometryRect(innerWidth, innerHeight), new Material(new Texture(images[0], FormatRGB), false));
renderer.append(background);

3 再往渲染器丢一个实例化版本的雪碧图(精灵图)

 1 //将上面加载好的0-7张图打包成一张图
 2 const si = 4, len = 8;
 3 const context = ElementUtils.createContext(images[si].width * len, images[si].height, true);
 4 for(let i = 0; i < len; i++){
 5     context.drawImage(images[i+si], images[i+si].width * i, 0);
 6 }
 7 
 8 
 9 //创建 InstancedSprite 实例化雪碧图
10 const instancedSprite = new InstancedSprite(
11     new GeometryRect(images[si].width, context.canvas.height), 
12     new Material(new Texture(context.canvas, FormatRGBA), true),
13     2, false, len, 0
14 );
15 
16 
17 //初始化所有实例(2个)的位置
18 for(let i = 0; i < instancedSprite.len; i++){
19     instancedSprite.translateI(i, instancedSprite.geometry.width * i, 0);
20 }
21 
22 
23 //
24 renderer.append(instancedSprite);
25 
26 
27 //补间 每 120 毫秒更换一次
28 const instancedSpriteTween = new TweenCache({x: 0}, {x: 1}, 120, () => { 
29     instancedSprite.offset += 1;
30     instancedSpriteTween.reverse();
31     instancedSpriteTween.start();
32 }, true);

4 创建后期处理(就是水波纹特效)

const imageSource = new ImageSource(renderTargetGeometry.width, renderTargetGeometry.height, null); //第三个参数必须为null

const renderTargetGeometry = new GeometryRect(renderer.domElement.width, renderer.domElement.height);

const renderTargetMaterial = new MaterialShader({

    vertexCode: defaultShaderCode.texture1.vertex, //使用默认的顶点着色器
        
        //水波纹主要实现代码(原理很简单就是偏移uv坐标): 
    fragmentCode: `#version 300 es
        precision mediump float; //highp, mediump, lowp
        uniform vec2 uSize;
        uniform sampler2D uImage;
        uniform vec2 uOrigin;
        uniform vec2 uRange;
        uniform float uScale;
        uniform float uLife;
        uniform float uTime;
        in vec2 vPos;

        out vec4 outColor;
        const float PI = 3.141592653589793;
        vec2 uv;

        float atan2(float y, float x) {
            if(x > 0.0){return atan(y / x);}
            if(x < 0.0){
                if(y >= 0.0){return atan(y / x) + PI;}
                return atan(y / x) - PI;
            }
            if(y > 0.0){return PI;}
            if(y < 0.0){return -PI;}
            return 0.0;
        }

        void main() {
            vec2 newPos = vPos - uOrigin;
            float _d = newPos.x * newPos.x + newPos.y * newPos.y;
            if(_d < 0.001 || _d < uRange.x * uRange.x || _d > uRange.y * uRange.y){
                uv = vPos / uSize;
                uv.y = 1.0 - uv.y;
                outColor = texture(uImage, uv);
            } else {
                float s = sqrt(_d);
                float d = (1.0 - uScale) * s;
                float r = atan2(vPos.y, vPos.x);
                vec2 uv = (vPos + ((1.0 - s / uRange.y) * uLife) * vec2(cos(r) * sin(d - uTime) / d, sin(r) * sin(d - uTime) / d)) / uSize;
                uv.y = 1.0 - uv.y;
                outColor = texture(uImage, uv);
            }
        }
    `,

    uniforms: {
        uImage: new Texture(imageSource),
        uOrigin: [innerWidth / 2, innerHeight / 2], //扩散原点
        uRange: [1, 200], //0: 扩散最小半径, 1: 扩散最大半径;
        uScale: 0.6, //值越大波就越宽
        uLife: 200, //值越大起伏就越大
        uTime: 0,
    },
});

//把 Object2D 当作渲染目标
renderer.createRenderTarget(new Object2D(renderTargetGeometry, renderTargetMaterial));

5 屏幕点击事件

 1 var isRenderTarget = false;
 2 
 3 const renderTargetTween = new TweenCache({x: 0, y: 0}, {x: 0, y: 0}, 1000, () => isRenderTarget = false);
 4 
 5 renderer.domElement.addEventListener("click", e => {
 6         //重置水波纹的扩散原点
 7     renderTargetMaterial.uniforms.uOrigin[0] = e.offsetX;
 8     renderTargetMaterial.uniforms.uOrigin[1] = e.offsetY;
 9 
10         //重置水波纹的style
11     renderTargetTween.origin.x = 200;
12     renderTargetTween.origin.y = 0.6;
13     renderTargetTween.end.x = 0;
14     renderTargetTween.end.y = 0;
15 
16         //允许在动画循环中绘制水波纹
17     renderTargetTween.start();
18     isRenderTarget = true;
19 });

6 动画循环

 1 //loop
 2 new AnimateLoop(() => {
 3         //更新实例雪碧图的Tween
 4     instancedSpriteTween.update();
 5 
 6         //渲染器的正常绘制
 7     if(isRenderTarget === false) renderer.redraw();
 8 
 9     else {
10         //绘制后期处理(水波纹特效)
11         renderTargetTween.update();
12         renderTargetMaterial.uniforms.uLife = renderTargetTween.origin.x;
13         renderTargetMaterial.uniforms.uTime += renderTargetTween.origin.y;
14         renderer.redrawRenderTarget();
15     }
16 }).play();

//完整源码分享网址: https://share.weiyun.com/Vpkp5KP3

   1 import { Box, Matrix3, Vector2 } from './Utils.js';
   2 import { Shape, ShapeUtils, SplineCurve } from './TwoUtils.js';
   3 
   4 const BlendEquationAdd = [0, -1];
   5 
   6 const BlendDefault = [6, 7, -1, -1],
   7 BlendAdd = [1, 1, -1, -1],
   8 BlendSub = [0, 3, 0, 1],
   9 BlendMultiply = [0, 2, 0, 6];
  10 
  11 const ModePoints = "POINTS",
  12 ModeLineStrip = "LINE_STRIP",
  13 ModeLineLoop = "LINE_LOOP",
  14 ModeLines = "LINES",
  15 ModeTriangleStrip = "TRIANGLE_STRIP",
  16 ModeTriangleFan = "TRIANGLE_FAN",
  17 ModeTriangles = "TRIANGLES";
  18 
  19 const FormatAlpha = 0,
  20 FormatLuminance = 2,
  21 FormatLuminanceAlpha = 4,
  22 FormatRGB = 12,
  23 FormatRGBA = 14;
  24 
  25 const PixelStoreiFlipY = 2,
  26 PixelStoreiPremultiplyAlpht = 3;
  27 
  28 
  29 /* test defaultShaderCode.texture2_blend
  30     const geometry = new GeometryRect(200, 200); //二维的矩形
  31 
  32     const sstruet = new Structure({
  33         vertexCode: defaultShaderCode.texture2_blend.vertex,
  34         fragmentCode: defaultShaderCode.texture2_blend.fragment,
  35 
  36         attributes: {
  37             aPos: new Attribute(2, geometry.vertices),
  38         },
  39 
  40         uniforms: {
  41             uPMat: renderer.projectionMatrix,
  42             uMat: new Matrix3().translate(100, 100).toArray(), 
  43             uSampler: images[2], //不透明的背景图
  44             uSampler1: images[4], //透明的圆球
  45             opacity: 1,
  46             ratio: 0.5,
  47             uSize: [geometry.width, geometry.height],
  48         },
  49 
  50         indices: geometry.indices,
  51     });
  52 
  53     renderer.append(sstruet).redraw();
  54 */
  55 
  56 /* test defaultShaderCode.texture2_after
  57     const geometry = new GeometryRect(200, 200); //二维的矩形
  58 
  59     const sstruet = new Structure({
  60         vertexCode: defaultShaderCode.texture2_after.vertex,
  61         fragmentCode: defaultShaderCode.texture2_after.fragment,
  62 
  63         attributes: {
  64             aPos: new Attribute(2, geometry.vertices),
  65         },
  66 
  67         uniforms: {
  68             uPMat: renderer.projectionMatrix,
  69             uMat: new Matrix3().translate(100, 100).toArray(), 
  70             uSampler: images[2],
  71             uSampler1: images[3], 
  72             damp: 1,
  73             uSize: [geometry.width, geometry.height],
  74         },
  75 
  76         indices: geometry.indices,
  77     });
  78 
  79     renderer.append(sstruet).redraw();
  80 */
  81 
  82 /* test defaultShaderCode.texture2_WaterRefract
  83     const geometry = new GeometryRect(innerWidth, innerHeight); //二维的矩形
  84     const sstruet = new Structure({
  85         vertexCode: defaultShaderCode.texture2_WaterRefract.vertex,
  86         fragmentCode: defaultShaderCode.texture2_WaterRefract.fragment,
  87 
  88         attributes: {
  89             aPos: new Attribute(2, geometry.vertices),
  90         },
  91 
  92         uniforms: {
  93             uPMat: renderer.projectionMatrix,
  94             uMat: new Matrix3().toArray(), 
  95             textureMatrix: new Matrix3().toArray(), 
  96             uSampler: images[5], //waterColor.jpg
  97             uSampler1: images[5], //waterNormal.jpg
  98             uColor: [0, 0.5, 0], //绿色
  99             uTime: 0,
 100             uSize: [geometry.width, geometry.height],
 101         },
 102 
 103         indices: geometry.indices,
 104     });
 105 
 106     function loop() {
 107         sstruet.uniforms.uTime -= 0.05;
 108         renderer.redraw();
 109     }
 110 
 111     renderer.append(sstruet);
 112     new AnimateLoop(loop).play();
 113 */
 114 
 115 
 116 const defaultShaderCode = {
 117     color_v4: {
 118         vertex: `
 119             attribute vec2 aPos;
 120             uniform mat3 uPMat;
 121             uniform mat3 uMat;
 122             void main() {
 123                 gl_Position.xyz = uPMat * uMat * vec3(aPos, 1.0);
 124                 gl_Position.w = 1.0;
 125             }
 126         `,
 127         fragment: `
 128             precision mediump float; //highp, mediump, lowp
 129             uniform vec4 uColor;
 130             void main() {
 131                 gl_FragColor = uColor;
 132             }
 133         `,
 134     },
 135     texture1: {
 136         vertex: `#version 300 es
 137             in vec2 aPos;
 138             uniform mat3 uPMat;
 139             uniform mat3 uMat;
 140             out vec2 vPos;
 141             void main() {
 142                 vPos = aPos;
 143                 gl_Position.xyz = uPMat * uMat * vec3(aPos, 1.0);
 144                 gl_Position.w = 1.0;
 145             }
 146         `,
 147         fragment: `#version 300 es
 148             precision mediump float; //highp, mediump, lowp
 149             uniform sampler2D uImage;
 150             uniform vec2 uSize;
 151             in vec2 vPos;
 152             out vec4 outColor;
 153             void main() {
 154                 outColor = texture(uImage, vPos / uSize);
 155             }
 156         `,
 157     },
 158     texture1_sprite: {
 159         vertex: `#version 300 es
 160             in vec2 aPos;
 161             uniform mat3 uPMat;
 162             uniform mat3 uMat;
 163             out vec2 vPos;
 164             void main() {
 165                 vPos = aPos;
 166                 gl_Position.xyz = uPMat * uMat * vec3(aPos, 1.0);
 167                 gl_Position.w = 1.0;
 168             }
 169         `,
 170         fragment: `#version 300 es
 171             precision mediump float; //highp, mediump, lowp
 172             uniform sampler2D uImage;
 173             uniform float uLen;
 174             uniform float uOffset;
 175             uniform vec2 uSize;
 176             in vec2 vPos;
 177             out vec4 outColor;
 178             void main() {
 179                 outColor = texture(uImage, vec2(vPos.x / (uSize.x * uLen) + 1.0 / uLen * uOffset, vPos.y / uSize.y));
 180             }
 181         `,
 182     },
 183     texture1_Instanced: {
 184         vertex: `#version 300 es
 185             in vec2 aPos;
 186             in mat3 uIMat;
 187             uniform mat3 uPMat;
 188             uniform mat3 uMat;
 189             out vec2 vPos;
 190             void main() {
 191                 vPos = aPos;
 192                 gl_Position.xyz = uPMat * uMat * uIMat * vec3(aPos, 1.0);
 193                 gl_Position.w = 1.0;
 194             }
 195         `,
 196         fragment: `#version 300 es
 197             precision mediump float; //highp, mediump, lowp
 198             uniform sampler2D uImage;
 199             uniform vec2 uSize;
 200             in vec2 vPos;
 201             out vec4 outColor;
 202             void main() {
 203                 outColor = texture(uImage, vPos / uSize);
 204             }
 205         `,
 206     },
 207     texture1_Instanced_points: {
 208         vertex: `#version 300 es
 209             in vec2 aPos;
 210             in mat3 uIMat;
 211             uniform mat3 uPMat;
 212             uniform mat3 uMat;
 213             uniform float uSize;
 214             void main() {
 215                 gl_Position.xyz = uPMat * uMat * uIMat * vec3(aPos, 1.0);
 216                 gl_Position.w = 1.0;
 217                 gl_PointSize = uSize;
 218             }
 219         `,
 220         fragment: `#version 300 es
 221             precision mediump float; //highp, mediump, lowp
 222             uniform sampler2D uImage;
 223             out vec4 outColor;
 224             void main() {
 225                 outColor = texture(uImage, gl_PointCoord.xy);
 226             }
 227         `,
 228     },
 229     texture1_Instanced_sprite: {
 230         vertex: `#version 300 es
 231             in vec2 aPos;
 232             in mat3 uIMat;
 233             uniform mat3 uPMat;
 234             uniform mat3 uMat;
 235             out vec2 vPos;
 236             void main() {
 237                 vPos = aPos;
 238                 gl_Position.xyz = uPMat * uMat * uIMat * vec3(aPos, 1.0);
 239                 gl_Position.w = 1.0;
 240             }
 241         `,
 242         fragment: `#version 300 es
 243             precision mediump float; //highp, mediump, lowp
 244             uniform sampler2D uImage;
 245             uniform float uLen;
 246             uniform float uOffset;
 247             uniform vec2 uSize;
 248             in vec2 vPos;
 249             out vec4 outColor;
 250             void main() {
 251                 outColor = texture(uImage, vec2(vPos.x / (uSize.x * uLen) + 1.0 / uLen * uOffset, vPos.y / uSize.y));
 252             }
 253         `,
 254     },
 255     texture1_fog: {
 256         vertex: `
 257             attribute vec2 aPos;
 258             uniform mat3 uPMat;
 259             uniform mat3 uMat;
 260             varying vec2 vPos;
 261             void main() {
 262                 vPos = aPos;
 263                 gl_Position.xyz = uPMat * uMat * vec3(aPos, 1.0);
 264                 gl_Position.w = 1.0;
 265             }
 266         `,
 267         fragment: `
 268             precision mediump float; //highp, mediump, lowp
 269             uniform sampler2D uSampler;
 270             uniform vec4 uFogColor;
 271             uniform float uFogAmount;
 272             uniform vec2 uSize;
 273             varying vec2 vPos;
 274             void main() {
 275                 gl_FragColor = mix(texture2D(uSampler, vPos / uSize), uFogColor, uFogAmount);
 276             }
 277         `,
 278     },
 279     texture1_brightContrast: { //亮度对比度
 280         vertex: `
 281             attribute vec2 aPos;
 282             uniform mat3 uPMat;
 283             uniform mat3 uMat;
 284             varying vec2 vPos;
 285             void main() {
 286                 vPos = aPos;
 287                 gl_Position.xyz = uPMat * uMat * vec3(aPos, 1.0);
 288                 gl_Position.w = 1.0;
 289             }
 290         `,
 291         fragment: `
 292             precision mediump float; //highp, mediump, lowp
 293             uniform sampler2D uSampler;
 294             uniform float bright;
 295             uniform float contrast;
 296             uniform vec2 uSize;
 297             varying vec2 vPos;
 298             void main() {
 299                 gl_FragColor = texture2D(uSampler, vPos / uSize);
 300                 gl_FragColor.rgb += bright;
 301                 if(contrast > 0.0){
 302                     gl_FragColor.rgb = (gl_FragColor.rgb - 0.5) / (1.0 - contrast) + 0.5;
 303                 } else {
 304                     gl_FragColor.rgb = (gl_FragColor.rgb - 0.5) * (1.0 + contrast) + 0.5;
 305                 }
 306             }
 307         `,
 308     },
 309     texture1_color_ifv3: {
 310         vertex: `
 311             attribute vec2 aPos;
 312             uniform mat3 uPMat;
 313             uniform mat3 uMat;
 314             varying vec2 vPos;
 315             void main() {
 316                 vPos = aPos;
 317                 gl_Position.xyz = uPMat * uMat * vec3(aPos, 1.0);
 318                 gl_Position.w = 1.0;
 319             }
 320         `,
 321         fragment: `
 322             precision mediump float; //highp, mediump, lowp
 323             uniform sampler2D uSampler;
 324             uniform vec3 uColor;
 325             uniform vec2 uSize;
 326             varying vec2 vPos;
 327             void main() {
 328                 vec4 tex = texture2D(uSampler, vPos / uSize);
 329                 gl_FragColor = vec4(dot(tex.xyz, vec3(0.299, 0.587, 0.114)) * uColor, tex.w);
 330             }
 331         `,
 332     },
 333     texture2_blend: {
 334         vertex: `
 335             attribute vec2 aPos;
 336             uniform mat3 uPMat;
 337             uniform mat3 uMat;
 338             varying vec2 vPos;
 339             void main() {
 340                 vPos = aPos;
 341                 gl_Position.xyz = uPMat * uMat * vec3(aPos, 1.0);
 342                 gl_Position.w = 1.0;
 343             }
 344         `,
 345         fragment: `
 346             precision mediump float; //highp, mediump, lowp
 347             uniform sampler2D uSampler;
 348             uniform sampler2D uSampler1;
 349             uniform float opacity;
 350             uniform float ratio;
 351             uniform vec2 uSize;
 352             varying vec2 vPos;
 353             void main() {
 354                 vec2 uv = vPos / uSize;
 355                 gl_FragColor = opacity * mix(texture2D(uSampler, uv), texture2D(uSampler1, uv), ratio);
 356             }
 357         `,
 358     },
 359     texture2_after: {
 360         vertex: `
 361             attribute vec2 aPos;
 362             uniform mat3 uPMat;
 363             uniform mat3 uMat;
 364             varying vec2 vPos;
 365             void main() {
 366                 vPos = aPos;
 367                 gl_Position.xyz = uPMat * uMat * vec3(aPos, 1.0);
 368                 gl_Position.w = 1.0;
 369             }
 370         `,
 371         fragment: `
 372             precision mediump float; //highp, mediump, lowp
 373             uniform sampler2D uSampler;
 374             uniform sampler2D uSampler1;
 375             uniform float damp;
 376             uniform vec2 uSize;
 377             varying vec2 vPos;
 378             vec4 when_gt(vec4 x, float y) {
 379                 return max(sign(x - y), 0.0);
 380             }
 381             void main() {
 382                 vec2 uv = vPos / uSize;
 383                 vec4 tex = texture2D(uSampler, uv);
 384                 tex *= damp * when_gt(tex, 0.1);
 385                 gl_FragColor = max(texture2D(uSampler1, uv), tex);
 386             }
 387         `,
 388     },
 389     texture2_WaterRefract: { //水折射
 390         vertex: `
 391             attribute vec2 aPos;
 392             uniform mat3 uPMat;
 393             uniform mat3 uMat;
 394             varying vec2 vPos;
 395 
 396             uniform mat3 textureMatrix;
 397             varying vec3 vUvRefraction;
 398 
 399             void main() {
 400                 vPos = aPos;
 401                 vec3 pos = vec3(aPos, 1.0);
 402                 vUvRefraction = textureMatrix * pos;
 403                 gl_Position.xyz = uPMat * uMat * pos;
 404                 gl_Position.w = 1.0;
 405             }
 406         `,
 407         fragment: `
 408             precision mediump float; //highp, mediump, lowp
 409             uniform sampler2D uSampler;
 410             uniform sampler2D uSampler1;
 411             uniform vec3 uColor;
 412             uniform float uTime;
 413             uniform vec2 uSize;
 414             varying vec2 vPos;
 415             
 416             varying vec3 vUvRefraction;
 417 
 418             float blendOverlay(float base, float blend) {
 419                 return(base < 0.5 ? (2.0 * base * blend) : (1.0 - 2.0 * (1.0 - base) * (1.0 - blend)));
 420             }
 421 
 422             vec3 blendOverlay(vec3 base, vec3 blend) {
 423                 return vec3(blendOverlay(base.r, blend.r), blendOverlay(base.g, blend.g),blendOverlay(base.b, blend.b));
 424             }
 425 
 426             void main() {
 427                 vec2 uv = vPos / uSize;
 428                 float waveStrength = 0.5;
 429                 float waveSpeed = 0.03;
 430 
 431                 // simple distortion (ripple) via dudv map (see https://www.youtube.com/watch?v=6B7IF6GOu7s)
 432 
 433                 vec2 distortedUv = texture2D(uSampler1, vec2(uv.x + uTime * waveSpeed, uv.y)).rg * waveStrength;
 434                 distortedUv = uv.xy + vec2(distortedUv.x, distortedUv.y + uTime * waveSpeed);
 435                 vec2 distortion = (texture2D(uSampler1, distortedUv).rg * 2.0 - 1.0) * waveStrength;
 436 
 437                 // new vUvRef coords
 438 
 439                 vec4 vUvRef = vec4(vUvRefraction, 1.0);
 440                 vUvRef.xy += distortion;
 441 
 442                 vec4 base = texture2DProj(uSampler, vUvRef);
 443 
 444                 gl_FragColor = vec4(blendOverlay(base.rgb, uColor), 1.0);
 445 
 446                 //#include <tonemapping_fragment>
 447                 //#include <colorspace_fragment>
 448             }
 449         `,
 450     },
 451 }
 452 
 453 //返回是否时可用像素源
 454 function isPixelSource(source) {
 455     /* TypeArray: 
 456         Uint8Array 如果 type 是 gl.UNSIGNED_BYTE则必须使用
 457         Uint16Array 如果 type 是 gl.UNSIGNED_SHORT_5_6_5, gl.UNSIGNED_SHORT_4_4_4_4, gl.UNSIGNED_SHORT_5_5_5_1, gl.UNSIGNED_SHORT 或ext.HALF_FLOAT_OES则必须使用
 458         Uint32Array 如果type 是 gl.UNSIGNED_INT 或ext.UNSIGNED_INT_24_8_WEBGL则必须使用
 459         Float32Array 如果type 是 gl.FLOAT则必须使用
 460     */
 461     return ImageData.prototype.isPrototypeOf(source) ||
 462     ImageBitmap.prototype.isPrototypeOf(source) ||
 463     HTMLImageElement.prototype.isPrototypeOf(source) || 
 464     HTMLCanvasElement.prototype.isPrototypeOf(source) || 
 465     HTMLVideoElement.prototype.isPrototypeOf(source);
 466 }
 467 
 468 //翻转 points: [x, y, x1, y1, ...] => [x1, y1, x, y, ...];
 469 function reversePoints(points = [0, 0, 0, 0]) {
 470     for(let i = 0, j = points.length - 1; i < j; i += 2, j -= 2){
 471         points[i] = points[j-1];
 472         points[i+1] = points[j];
 473         points[j] = points[i+1];
 474         points[j-1] = points[i];
 475     }
 476     return points;
 477 }
 478 
 479 //value 是否是2的幂
 480 function isPowerOf2(value) {
 481     return (value & (value - 1)) === 0;
 482 }
 483 
 484 //array 的某个元素如果超出 Uint16Array 范围则立即返回true
 485 function arrayNeedsUint32( array ) {
 486     // assumes larger values usually on last
 487     for ( let i = array.length - 1; i >= 0; -- i ) {
 488         if ( array[ i ] >= 65535 ) return true; // account for PRIMITIVE_RESTART_FIXED_INDEX, #24565
 489     }
 490     return false;
 491 }
 492 
 493 //平移顶点
 494 function translateVertices(vertices, count, x, y) {
 495     for(let i = 0; i < vertices.length; i += count){
 496         vertices[i] += x;
 497         vertices[i + 1] += y;
 498     }
 499 }
 500 
 501 //计算包围盒
 502 function computeBBox(vertices, count) {
 503     let minX = Infinity, minY = Infinity, maxX = -Infinity, maxY = -Infinity;
 504     for(let i = 0, x, y; i < vertices.length; i += count){
 505         x = vertices[i];
 506         y = vertices[i + 1];
 507         minX = Math.min(x, minX);
 508         minY = Math.min(y, minY);
 509         maxX = Math.max(x, maxX);
 510         maxY = Math.max(y, maxY);
 511     }
 512     return {x: minX, y: minY, x1: maxX, y1: maxY}
 513 }
 514 
 515 /**
 516  * @returns {WebGL2RenderingContext}
 517  */
 518 function createWebGL2(contextOption = Renderer.contextOption, glOption = Renderer.glOption){
 519     const canvas = document.createElement("canvas");
 520     const gl = canvas.getContext("webgl2", contextOption);
 521     //gl.viewport(0, 0, width, height);
 522     
 523     const clearColor = glOption.clearColor || {r: 0.45, g: 0.45, b: 0.45, a: 1}
 524     gl.clearColor(Math.min(clearColor.r, 1), Math.min(clearColor.g, 1), Math.min(clearColor.b, 1), Math.min(clearColor.a, 1)); //清除颜色: r, g, b, a: 0 - 1; 对应 .clear(COLOR_BUFFER_BIT)
 525     //gl.clear(gl.COLOR_BUFFER_BIT); //COLOR_BUFFER_BIT //颜色缓冲区 gl.DEPTH_BUFFER_BIT //深度缓冲区 STENCIL_BUFFER_BIT //模板缓冲区
 526     //gl.getParameter(gl.COLOR_CLEAR_VALUE); //要获得当前的清除值，传入 COLOR_CLEAR_VALUE, DEPTH_CLEAR_VALUE 或 STENCIL_CLEAR_VALUE 常量
 527 
 528     //gl.enable(gl.DEPTH_TEST); //启用深度 对应 .clear(DEPTH_BUFFER_BIT)
 529     //gl.depthFunc(gl.LEQUAL); // Near things obscure far things 近覆盖远
 530     //gl.clearDepth(1); // 设置深度缓冲区的值（0-1），默认为1
 531     
 532     //gl.clearStencil(1) //设置模板缓冲区的值（0或1），默认0; 对应 .clear(STENCIL_BUFFER_BIT);
 533 
 534     //gl.enable(gl.SCISSOR_TEST); //开启剪裁
 535     //gl.scissor(x, y, width, height); //设置剪裁区域
 536 
 537     //gl.colorMask(true, true, true, false); //禁启用: 红色通道, 绿色通道, 蓝色通道, 透明度(如果为false则不会绘制任何颜色即完全透明);
 538 
 539     //混合
 540     //gl.enable(gl.BLEND);  // 启用混合, 默认透明部分用背景色覆盖
 541     //gl.blendEquation(gl.FUNC_ADD);
 542     
 543     //gl.blendFunc(gl.ONE, gl.ONE); //gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);
 544 
 545     //gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA); //将所有颜色乘以源 alpha 值, 将所有颜色乘以 1 减去源 alpha 值。
 546     //gl.disable(gl.BLEND); //禁用混合
 547     //gl.getParameter(gl.BLEND_SRC_RGB) == gl.SRC_COLOR;
 548     //混合像素的方法:
 549 
 550     //gl.drawElements(gl.TRIANGLES, obj2d.geometry.indices.length, gl.UNSIGNED_SHORT, 0); //gl.UNSIGNED_BYTE, gl.UNSIGNED_SHORT
 551     //gl.drawArrays(mode, 0, geo.vertices.length / geo.vertexCount);
 552     return gl;
 553 }
 554 
 555 function initExtensions(gl) {
 556     // 启用了抗锯齿
 557     if(Renderer.contextOption.antialias === true && !gl.getContextAttributes().antialias && gl.getExtension('WEBGL_multisample_2d_canvas')) {
 558         gl.sampleCoverage = true;
 559         gl.enable(gl.SAMPLE_ALPHA_TO_COVERAGE);
 560     }
 561 
 562     //扩展 WEBGL_multi_draw 
 563     /* const WEBGL_multi_draw = gl.getExtension('WEBGL_multi_draw');
 564     if (WEBGL_multi_draw) {
 565         var multiDrawElementsWEBGL = gl.multiDrawElementsWEBGL.bind(gl);
 566         // 准备你要绘制的元素的信息
 567         var counts = []; //每个draw call的元素数量
 568         var offsets = []; //每个draw call的起始偏移
 569         // 调用 multiDrawElementsWEBGL 方法
 570         multiDrawElementsWEBGL(gl.TRIANGLES, counts, gl.UNSIGNED_SHORT, offsets);
 571     } */
 572 }
 573 
 574 function createShader(gl, program, type, code) {
 575     const shader = gl.createShader(type); //创建着色器
 576     gl.shaderSource(shader, code); //绑定数据源
 577     gl.compileShader(shader); //编译着色器
 578     gl.attachShader(program, shader); //绑定着色器
 579     if(gl.getShaderParameter(shader, gl.COMPILE_STATUS) === false){
 580         console.error(type, gl.getShaderInfoLog(shader), code);
 581         gl.deleteShader(shader);
 582     }
 583     return shader;
 584 }
 585 
 586 function createProgram(gl, vertexShaderCode, fragmentShaderCode) {
 587     if(!gl) return null;
 588     const program = gl.createProgram();
 589     const vertexShader = createShader(gl, program, gl.VERTEX_SHADER, vertexShaderCode);
 590     const fragmentShader = createShader(gl, program, gl.FRAGMENT_SHADER, fragmentShaderCode);
 591     
 592     gl.linkProgram(program); //连接顶点着色器与片元着色器
 593     if(gl.getProgramParameter(program, gl.LINK_STATUS) === false){
 594         console.error(gl.getProgramInfoLog(program));
 595         gl.deleteProgram(program);
 596         return null;
 597     }
 598     
 599     return {
 600         program: program,
 601         vertexShader: vertexShader,
 602         fragmentShader: fragmentShader,
 603     };
 604 }
 605 
 606 function compileUniform(gl, loc, n, v, t) {
 607     //number
 608     switch(typeof v[n]){
 609         case "number": 
 610         return () => gl.uniform1f(loc, v[n]);
 611 
 612         case "object": 
 613         break;
 614 
 615         default: return function(){};
 616     }
 617 
 618     //vec2, vec3, vec4, Matrix3x3, Matrix4x4
 619     if(Array.isArray(v[n]) === true){
 620         switch(v[n].length){
 621             case 2: 
 622             return () => gl.uniform2f(loc, v[n][0], v[n][1]);
 623     
 624             case 3: 
 625             return () => gl.uniform3f(loc, v[n][0], v[n][1], v[n][2]);
 626             
 627             case 4: 
 628             return () => gl.uniform4f(loc, v[n][0], v[n][1], v[n][2], v[n][3]);
 629     
 630             case 9: 
 631             return () => gl.uniformMatrix3fv(loc, false, v[n]);
 632     
 633             case 16: 
 634             return () => gl.uniformMatrix4fv(loc, false, v[n]);
 635         }
 636     }
 637 
 638     //Material
 639     /* if(Material.prototype.isPrototypeOf(v[n]) === true){
 640         const i = t.length, 
 641         obj = {
 642             texture: gl.createTexture(), 
 643             source: v[n], 
 644             index: gl["TEXTURE"+i], 
 645             needupdate: false,
 646         };
 647 
 648         t[i] = obj;
 649         gl.activeTexture(obj.index);
 650         gl.bindTexture(gl.TEXTURE_2D, obj.texture);
 651         
 652         const material = v[n];
 653         obj.update = () => {
 654             if(material.source !== null) updateTexture(gl, material);
 655         }
 656         Object.defineProperties(obj, {
 657             source: {get: () => {return material.source;}},
 658             needupdate: {get: () => {return material.needupdate;}},
 659         });
 660         obj.update();
 661         return () => gl.uniform1i(loc, i);
 662     } */
 663 
 664     //Attribute
 665     if(Attribute.prototype.isPrototypeOf(v[n]) === true){
 666         switch(v[n].size){
 667             case 1: 
 668             return () => gl.uniform1fv(loc, v[n].value);
 669 
 670             case 2: 
 671             return () => gl.uniform2fv(loc, v[n].value);
 672 
 673             case 3: 
 674             return () => gl.uniform3fv(loc, v[n].value);
 675 
 676             case 4: 
 677             return () => gl.uniform4fv(loc, v[n].value);
 678         }
 679     }
 680 
 681     return function(){};
 682 }
 683 
 684 function compileBuffer(gl, loc, att) {
 685     const obj = {
 686         vao: gl.createVertexArray(),
 687         buffer: gl.createBuffer(),
 688         size: att.size,
 689         //loc: loc, //如果着色器中没有用到这个变量就会返回-1
 690         value: att.value,
 691     }
 692 
 693     gl.bindVertexArray(obj.vao);
 694     gl.bindBuffer(gl.ARRAY_BUFFER, obj.buffer); //指定 buffer
 695     gl.bufferData(gl.ARRAY_BUFFER, obj.value, gl.STATIC_DRAW); //上传数据到指定的 buffer
 696     gl.vertexAttribPointer(loc, att.size, gl.FLOAT, false, 0, 0);
 697     gl.enableVertexAttribArray(loc);
 698 
 699     return obj;
 700 }
 701 
 702 function resetBuffers(gl) {
 703     gl.bindVertexArray(null);
 704     gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, null);
 705     gl.bindBuffer(gl.ARRAY_BUFFER, null);
 706     gl.bindTexture(gl.TEXTURE_2D, null);
 707 }
 708 
 709 function createBuffers(gl, vertices, indices) {
 710     //索引 indices
 711     var indexBuffer = null;
 712     if(indices) {
 713         indexBuffer = gl.createBuffer();
 714         gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, indexBuffer);
 715         gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, indices, gl.STATIC_DRAW);
 716     }
 717     
 718     //顶点 vertices
 719     const vertexBuffer = gl.createBuffer();
 720     gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer); //指定储存单元
 721     gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW); //gl.STATIC_DRAW: 写入一次,绘制多次(不能再次修改,可重复使用)
 722 
 723     //纹理坐标 uvs
 724     //const uvBuffer = gl.createBuffer();
 725     //gl.bindBuffer(gl.ARRAY_BUFFER, uvBuffer);
 726     //gl.bufferData(gl.ARRAY_BUFFER, uvs, gl.STATIC_DRAW);
 727 
 728     //const loc = gl.getAttribLocation(pro, "aPosition");
 729     
 730     //gl.vertexAttribPointer(loc, vertexCount, gl.FLOAT, false, 0, 0);
 731 
 732     return {
 733         indexBuffer: indexBuffer,
 734         vertexBuffer: vertexBuffer,
 735         //uvBuffer: uvBuffer,
 736     }
 737 }
 738 
 739 function deleteBuffers(gl, buffers) {
 740     if(!buffers) return;
 741     for(let n in buffers){
 742         if(buffers[n]) gl.deleteBuffer(buffers[n]);
 743     }
 744 }
 745 
 746 function updateTexture(gl, tex) {
 747     //像素预处理
 748     if(Array.isArray(tex.pixelStorei) === true) {
 749         for(let i = 0, v; i < tex.pixelStorei.length; i++) {
 750             v = Texture.pixelStoreis[tex.pixelStorei[i]];
 751             if(v !== undefined) gl.pixelStorei(gl[v], true);
 752         }
 753     }
 754 
 755     if(ImageSource.prototype.isPrototypeOf(tex.source) === true){
 756         gl.texImage2D(gl.TEXTURE_2D, 0, gl[tex.format], tex.source.width, tex.source.height, 0, gl[tex.format], gl[tex.type], tex.source.data);
 757     } else {
 758         gl.texImage2D(gl.TEXTURE_2D, 0, gl[tex.format], gl[tex.format], gl[tex.type], tex.source);
 759     }
 760 
 761     //gl.getParameter(gl.MAX_TEXTURE_SIZE);
 762     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR); //LINEAR (default value)(线性的), NEAREST(最近的)
 763     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); //REPEAT(重复), CLAMP_TO_EDGE(夹到边缘), MIRRORED_REPEAT(像镜子一样的重复?)
 764     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
 765     
 766     //mipmap
 767     if(tex.mipmap === true){ // && isPowerOf2(tex.source.width) === true && isPowerOf2(tex.source.height) === true
 768         gl.generateMipmap(gl.TEXTURE_2D);
 769         gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR);
 770     } else {
 771         //gl.LINEAR, gl.NEAREST, gl.NEAREST_MIPMAP_NEAREST, gl.LINEAR_MIPMAP_NEAREST, gl.NEAREST_MIPMAP_LINEAR (default value), gl.LINEAR_MIPMAP_LINEAR.
 772         gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR); 
 773     }
 774 }
 775 
 776 function proHandler(gl, pros, renderer, object2d) {
 777     const isMS = MaterialShader.prototype.isPrototypeOf(object2d.material);
 778 
 779     const result = {
 780         cache: null, 
 781         uniforms: {
 782             uPMat: renderer.projectionMatrix, 
 783             uMat: object2d.modelMatrix, 
 784             uSize: [object2d.geometry.width, object2d.geometry.height], 
 785         }, 
 786     }
 787 
 788     if(isMS === false){
 789         result.uniforms.uImage = object2d.material.texture;
 790     } else {
 791         const properties = {};
 792         for(let n in object2d.material.uniforms){
 793             properties[n] = {
 794                 enumerable: true,
 795                 get: () => {return object2d.material.uniforms[n];},
 796             }
 797         }
 798         Object.defineProperties(result.uniforms, properties);
 799     }
 800 
 801     let proName = "", pro = null;
 802 
 803     switch(object2d.constructor.name){
 804         case "Object2D": 
 805         proName = "texture1";
 806 
 807         if(isMS === false){
 808             pro = pros[proName];
 809         } else {
 810             pro = createProgram(gl, object2d.material.vertexCode, object2d.material.fragmentCode);
 811             proName = "";
 812         }
 813 
 814         result.cache = new Cache(gl, proName, pro, object2d, gl[ModeTriangles]);
 815         break;
 816 
 817         case "Sprite": 
 818         proName = "texture1_sprite";
 819 
 820         if(isMS === false){
 821             pro = pros[proName];
 822         } else {
 823             pro = createProgram(gl, object2d.material.vertexCode, object2d.material.fragmentCode);
 824             proName = "";
 825         }
 826 
 827         if(result.uniforms.uLen === undefined) result.uniforms.uLen = object2d.len;
 828         if(result.uniforms.uOffset === undefined){
 829             Object.defineProperty(result.uniforms, "uOffset", {
 830                 enumerable: true, //编译时需要遍历 uniforms
 831                 get: () => {return object2d.offset;}, 
 832             });
 833         }
 834 
 835         result.cache = new Cache(gl, proName, pro, object2d, gl[ModeTriangles]);
 836         break;
 837 
 838         case "Instanced": 
 839         proName = "texture1_Instanced";
 840         
 841         if(isMS === false){
 842             pro = pros[proName];
 843         } else {
 844             pro = createProgram(gl, object2d.material.vertexCode, object2d.material.fragmentCode);
 845             proName = "";
 846         }
 847 
 848         result.cache = new CacheInstanced(gl, proName, pro, object2d, gl[ModeTriangles]);
 849         break;
 850 
 851         case "InstancedPoints": 
 852         proName = "texture1_Instanced_points";
 853         
 854         if(isMS === false){
 855             pro = pros[proName];
 856         } else {
 857             pro = createProgram(gl, object2d.material.vertexCode, object2d.material.fragmentCode);
 858             proName = "";
 859         }
 860 
 861         if(Array.isArray(result.uniforms.uSize) === true){
 862             Object.defineProperty(result.uniforms, "uSize", {
 863                 enumerable: true, //编译时需要遍历 uniforms
 864                 get: () => {return object2d.pointSize;}, 
 865             });
 866         }
 867         
 868         result.cache = new CacheInstanced(gl, proName, pro, object2d, gl[ModePoints]);
 869         break;
 870 
 871         case "InstancedSprite": 
 872         proName = "texture1_Instanced_sprite";
 873         
 874         if(isMS === false){
 875             pro = pros[proName];
 876         } else {
 877             pro = createProgram(gl, object2d.material.vertexCode, object2d.material.fragmentCode);
 878             proName = "";
 879         }
 880 
 881         if(result.uniforms.uLen === undefined) result.uniforms.uLen = object2d.len1;
 882         if(result.uniforms.uOffset === undefined){
 883             Object.defineProperty(result.uniforms, "uOffset", {
 884                 enumerable: true, //编译时需要遍历 uniforms
 885                 get: () => {return object2d.offset;}, 
 886             });
 887         }
 888         
 889         result.cache = new CacheInstanced(gl, proName, pro, object2d, gl[ModeTriangles]);
 890         break;
 891     }
 892 
 893     //if(isMS) Object.assign(result.uniforms, object2d.material.uniforms);
 894     //console.log(result.uniforms);
 895     return result;
 896 }
 897 
 898 /**
 899  * @param {WebGL2RenderingContext} gl 
 900  */
 901 function createRenderTarget(gl, width, height) {
 902     const texture = gl.createTexture();
 903     gl.bindTexture(gl.TEXTURE_2D, texture);
 904     gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
 905     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
 906     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
 907     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
 908 
 909     // Create and bind the framebuffer
 910     const frameBuffer = gl.createFramebuffer();
 911     gl.bindFramebuffer(gl.FRAMEBUFFER, frameBuffer);
 912     gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 0);
 913 
 914     //将一个 frameBuffer 复制到另一个 frameBuffer
 915     //this.gl.blitFramebuffer(0, 0, this.viewPort.width, this.viewPort.height, 0, 0, this.viewPort.width, this.viewPort.height,this.gl.COLOR_BUFFER_BIT, this.gl.LINEAR);
 916 
 917 
 918     //const renderBuffer = gl.createRenderbuffer();
 919     //gl.bindRenderbuffer(gl.RENDERBUFFER, renderBuffer);
 920 
 921     //gl.renderbufferStorageMultisample(gl.RENDERBUFFER, 4, gl.RGBA8, width, height);
 922 
 923     // 为渲染缓冲区指定存储数据的类型和尺寸
 924     //gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_COMPONENT16, width, height);
 925 
 926     // 6. 将渲染缓冲区对象附加到帧缓冲区对象上
 927     //gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, renderBuffer);
 928  
 929     gl.bindFramebuffer(gl.FRAMEBUFFER, null);
 930 
 931     return {
 932         texture: texture,
 933         frameBuffer: frameBuffer,
 934         //renderBuffer: renderBuffer,
 935     }
 936 }
 937 
 938 
 939 
 940 
 941 /* glsl 一些内置函数：‌
 942 abs 返回一个数的绝对值。‌
 943 acos 返回一个数的反余弦。‌
 944 asin 返回一个数的反正弦。‌
 945 atan 返回一个数的反正切。‌
 946 //atan2 返回从X轴到点(y,x)的角度（‌以弧度为单位）‌。‌
 947 cos 返回一个数的余弦。‌
 948 sin 返回一个数的正弦。‌
 949 sqrt 返回一个数的平方根。‌
 950 tan 返回一个数的正切。‌
 951 round 将一个指定的数值表达式舍入到最近的整数并将其返回。‌
 952 random 返回一个0和1之间的伪随机数。‌
 953 parseFloat 返回从字符串转换而来的浮点数。‌
 954 parseInt 返回从字符串转换而来的整数。‌
 955 pow 返回一个指定幂次的底表达式的值。‌
 956 step(float a, float x): a < x ? x : a;
 957 clamp(float x, float min, float max): min > x ? min : min < x && max > x ? x : max; 返回三个值中的中间值
 958 mix(vac4 color1, vec4 color2, float weight) 返回两种颜色的混合, color2 为 weight, color1 为 1 - weight
 959 mod(float x, float y): x % y
 960 
 961 exp 返回e的x次幂。‌
 962 log 返回x的自然对数，‌
 963 exp2 返回2的x次幂。‌
 964 log2 返回x的2为底的对数，
 965 
 966 inversesqrt 回1/xxx，
 967 sign 返回数值的符号值。‌
 968 
 969 texture2D(uSampler, gl_PointCoord.xy) gl_PointCoord 特殊变量能自动获取 points 的纹理坐标 
 970 */
 971 
 972 
 973 class Attribute {
 974 
 975     /**
 976      * @param {number} size 
 977      * @param {Array|TypeBufferArray} value 
 978      */
 979     constructor(size, value) {
 980         this.size = size;
 981         this.value = value;
 982     }
 983 
 984 }
 985 
 986 
 987 /** Geometry
 988 demo: 
 989     const width = 256, height = 256;
 990 
 991     const geometry = new Geometry({
 992         aPosition: new Attribute(2, new Float32Array([
 993             width,0, 0,0, 0,height, 
 994             0,height, width,height, width,0,
 995         ])),
 996     }, width, height);
 997 
 998 
 999     //顶点索引版本: 
1000     const geometry = new Geometry({
1001         aPosition: new Attribute(2, new Float32Array([
1002             0,0, width,0, width,height, 0,height,
1003         ]))
1004     }, width, height);
1005 
1006     geometry.setIndex([1,0,3, 3,2,1]);
1007 */
1008 class Geometry {
1009     
1010     #type = "UNSIGNED_SHORT"; //索引面的类型(初始化时自动选择设置); 可能的值有: UNSIGNED_SHORT|UNSIGNED_INT
1011     get type() {return this.#type;}
1012 
1013     #offset = 0; //绘制几何体的偏移
1014     get offset() {return this.#offset;}
1015     
1016     #indices = null;
1017     get indices() {return this.#indices;}
1018 
1019     #w = 0;
1020     #h = 0;
1021     get width() {return this.#w;}
1022     get height() {return this.#h;}
1023 
1024     /**
1025      * @param {{aPos: Attribute}} attributes 必须定义(面索用.setIndex()方法设置)
1026      * @param {Box} bbox 可选(如果未定义则在构造器中自动计算一次)
1027      */
1028     constructor(attributes, w = 0, h = 0) {
1029         this.attributes = attributes;
1030         this.#w = w;
1031         this.#h = h;
1032     }
1033 
1034     /**
1035      * 根据 this.attributes[attributeName] 的顶点设置边界大小
1036      * @param {string} attributeName 
1037      */
1038     computeSize(attributeName) {
1039         const att = this.attributes[attributeName];
1040         if(Attribute.prototype.isPrototypeOf(att) === false) return;
1041         const obj = computeBBox(att.value, att.size);
1042         if(obj.x !== 0 || obj.y !== 0){
1043             translateVertices(att.value, att.size, -obj.x, -obj.y);
1044             this.#w = Math.abs(obj.x1 - obj.x);
1045             this.#h = Math.abs(obj.y1 - obj.y);
1046         } else {
1047             this.#w = obj.x1;
1048             this.#h = obj.y1;
1049         }
1050     }
1051 
1052     /**
1053      * 设置顶点索引
1054      * @param {[]|Uint16Array|Uint32Array} indices 
1055      * @param {undefined|boolean} isu32 //如果 indices 已是类型数组可以忽略此参数
1056      * @returns 
1057      */
1058     setIndex(indices, isu32) {
1059         if(this.#indices !== null) return console.warn("不支持更改索引面");
1060 
1061         switch(indices.constructor.name){
1062             case "Array": 
1063             break;
1064 
1065             case "Uint32Array": 
1066             this.#type = "UNSIGNED_INT";
1067             this.#indices = indices;
1068             return;
1069             
1070             default: 
1071             case "Uint16Array": 
1072             this.#type = "UNSIGNED_SHORT";
1073             this.#indices = indices;
1074             return;
1075         }
1076 
1077         if(typeof isu32 !== "boolean"){
1078             isu32 = false;
1079             for(let i = 0; i < indices.length; i++){
1080                 if(indices[i] < 65535) continue;
1081                 isu32 = true;
1082                 break;
1083             }
1084         }
1085 
1086         if(isu32 === false) {
1087             this.#type = "UNSIGNED_SHORT";
1088             this.#indices = new Uint16Array(indices);
1089         } else {
1090             this.#type = "UNSIGNED_INT";
1091             this.#indices = new Uint32Array(indices);
1092         }
1093     }
1094 
1095 }
1096 
1097 
1098 //矩形
1099 class GeometryRect extends Geometry {
1100 
1101     constructor(width, height) {
1102         super({aPos: new Attribute(2, new Float32Array([0,0, width,0, width,height, 0,height]))}, width, height);
1103         this.setIndex([1, 0, 3, 3, 2, 1], false);
1104     }
1105 
1106 }
1107 
1108 
1109 //圆形
1110 class GeometryCircle extends Geometry {
1111    
1112     constructor(radius = 1, segments = 32, thetaStart = 0, thetaLength = Math.PI * 2) {
1113         segments = Math.max(3, segments);
1114 
1115         let minX = Infinity, minY = Infinity, maxX = -Infinity, maxY = -Infinity;
1116 
1117         const vertices = [0, 0];
1118         for ( let s = 0, i = 3, segment; s <= segments; s ++, i += 3 ) {
1119             segment = thetaStart + s / segments * thetaLength;
1120             const x = radius * Math.cos( segment ), 
1121             y = radius * Math.sin( segment );
1122             vertices.push(x, y);
1123             minX = Math.min(x, minX);
1124             minY = Math.min(y, minY);
1125             maxX = Math.max(x, maxX);
1126             maxY = Math.max(y, maxY);
1127         }
1128 
1129         const indices = [];
1130         for ( let i = 1; i <= segments; i ++ ) {
1131             indices.push( i, i + 1, 0 );
1132         }
1133 
1134         if(minX !== 0 || minY !== 0){
1135             translateVertices(vertices, 2, -minX, -minY);
1136             super({aPos: new Attribute(2, new Float32Array(vertices))}, Math.abs(maxX - minX), Math.abs(maxY - minY));
1137         } else {
1138             super({aPos: new Attribute(2, new Float32Array(vertices))}, maxX, maxY);
1139         }
1140 
1141         this.setIndex(indices);
1142     }
1143 
1144 }
1145 
1146 
1147 //形状
1148 class GeometryShape extends Geometry {
1149 
1150     constructor(points, segments = 1) {
1151         let isu32 = false, minX = Infinity, minY = Infinity, maxX = -Infinity, maxY = -Infinity;
1152 
1153         points = new Shape(points).extractPoints(segments).shape;
1154         if(ShapeUtils.isClockWise(points) === false) points = points.reverse();
1155 
1156         //
1157         const indices = [], vertices = [], 
1158         faces = ShapeUtils.triangulateShape(points, []);
1159         for(let i = 0, p, l = points.length; i < l; i ++){
1160             p = points[i];
1161             vertices.push(p.x, p.y);
1162             minX = Math.min(p.x, minX);
1163             minY = Math.min(p.y, minY);
1164             maxX = Math.max(p.x, maxX);
1165             maxY = Math.max(p.y, maxY);
1166         }
1167 
1168         for(let i = 0, face, l = faces.length; i < l; i++){
1169             face = faces[i];
1170             indices.push(face[0], face[1], face[2]);
1171             if(isu32 === false && (face[0] >= 65535 || face[1] >= 65535 || face[2] >= 65535)) isu32 = true;
1172         }
1173 
1174         //
1175     
1176         if(minX !== 0 || minY !== 0){
1177             translateVertices(vertices, 2, -minX, -minY);
1178             super({aPos: new Attribute(2, new Float32Array(vertices))}, Math.abs(maxX - minX), Math.abs(maxY - minY));
1179         } else {
1180             super({aPos: new Attribute(2, new Float32Array(vertices))}, maxX, maxY);
1181         }
1182         
1183         this.setIndex(indices, isu32);
1184     }
1185 
1186 }
1187 
1188 
1189 //波浪矩形
1190 class GeometryRectWavy extends GeometryShape {
1191 
1192     constructor(width, height, distance, divisions = 12) {
1193         const halfW = width / 2, halfH = height / 2;
1194         distance = distance === undefined ? Math.min(halfW, halfH) * 0.2 : Math.min(distance, Math.min(halfW, halfH) * 0.5);
1195         const points = [
1196             //右上
1197             new Vector2(halfW + distance, 0),
1198             new Vector2(width, 0),
1199             new Vector2(width, halfH - distance),
1200 
1201             //右下
1202             new Vector2(width, halfH + distance),
1203             new Vector2(width, height),
1204             new Vector2(halfW + distance, height),
1205 
1206             //左下
1207             new Vector2(halfW - distance, height),
1208             new Vector2(0, height),
1209             new Vector2(0, halfH + distance),
1210 
1211             //左上
1212             new Vector2(0, halfH - distance),
1213             new Vector2(0, 0),
1214             new Vector2(halfW - distance, 0),
1215         ];
1216 
1217         const points1 = [], curve = new SplineCurve();
1218         for(let i = 0; i < points.length; i += 3) {
1219             curve.points = [points[i], points[i+1], points[i+2]];
1220             const points2 = curve.getPoints(divisions);
1221             for(let i = 0; i < points2.length; i++){
1222                 points1.push(points2[i]);
1223             }
1224         }
1225 
1226         super(points1, 1);
1227     }
1228 
1229 }
1230 
1231 
1232 class ImageSource {
1233 
1234     /**
1235      * ImageData 的构造器不是很友好, 这是它的替代品
1236      * @param {number} w 
1237      * @param {number} h 
1238      * @param {Uint8Array} d //步长为4的数组, 分别是: r, g, b, a
1239      */
1240     constructor(w, h, d = new Uint8Array(w * h * 4)) {
1241         this.width = w;
1242         this.height = h;
1243         this.data = d;
1244     }
1245 
1246 }
1247 
1248 
1249 class Texture {
1250 
1251     static pixelStoreis = [
1252         "PACK_ALIGNMENT", //将像素数据打包到内存中
1253         "UNPACK_ALIGNMENT", //从内存中解压缩像素数据
1254         "UNPACK_FLIP_Y_WEBGL", //翻转纹理的y轴
1255         "UNPACK_PREMULTIPLY_ALPHA_WEBGL", //预乘阿尔法通道(将alpha通道与其他颜色通道相乘)
1256         "UNPACK_COLORSPACE_CONVERSION_WEBGL", //默认颜色空间转换或不进行颜色空间转换
1257     ];
1258 
1259     static formats = [
1260         "ALPHA", "UNSIGNED_BYTE", //14: 1,1; //阿尔法
1261         "LUMINANCE", "UNSIGNED_BYTE", //12: 1,1; //不透明灰度图
1262         "LUMINANCE_ALPHA",    "UNSIGNED_BYTE", //10: 2,2; //透明灰度图
1263         "RGB",    "UNSIGNED_SHORT_5_6_5", //8: 3,2
1264         "RGBA",    "UNSIGNED_SHORT_5_5_5_1", //6: 4,2
1265         "RGBA", "UNSIGNED_SHORT_4_4_4_4", //4: 4,3
1266         "RGB", "UNSIGNED_BYTE", //2: 3,3 //不透明
1267         "RGBA", "UNSIGNED_BYTE", //0: 4,4 //透明
1268     ];
1269 
1270     #f_t = 0;
1271     get format() {return Texture.formats[this.#f_t];}
1272     get type() {return Texture.formats[this.#f_t + 1];}
1273 
1274     #needupdate = false; //如果材质属性发生改变将此值设为true,渲染器会重绘材质的纹理(纹理不适合频繁的修改, 用着色器实现动态纹理)
1275     get needupdate() {
1276         if(this.#needupdate === false) return false;
1277         this.#needupdate = false;
1278         return true;
1279     }
1280 
1281     #source = null;
1282     get source() {return this.#source;}
1283     set source(v) {
1284         this.#source = v;
1285         this.#needupdate = true;
1286     }
1287 
1288     #pixelStorei = null;
1289     get pixelStorei() {return this.#pixelStorei;}
1290     get isPremultiplyAlpht() {
1291         return this.#pixelStorei === null ? false : this.#pixelStorei.includes(PixelStoreiPremultiplyAlpht);
1292     }
1293 
1294     #mipmap = false;
1295     get mipmap() {return this.#mipmap;}
1296     set mipmap(v) {
1297         if(typeof v !== "boolean" || v === this.#mipmap) return;
1298         this.#mipmap = v;
1299         this.#needupdate = true;
1300     }
1301 
1302     constructor(source, format = FormatRGBA, pixelStorei = [PixelStoreiPremultiplyAlpht], mipmap = false) {
1303         this.#source = source;
1304         this.#f_t = format;
1305         this.#pixelStorei = pixelStorei;
1306         this.#mipmap = mipmap;
1307     }
1308 
1309     setFormatAndType(v = FormatRGBA) {
1310         this.#f_t = v;
1311         this.#needupdate = true;
1312     }
1313 
1314     setPixelStorei(key = PixelStoreiPremultiplyAlpht, enable = false) {
1315         if(key >= Texture.pixelStoreis.length || key < 0) return;
1316         if(enable === true){
1317             if(this.#pixelStorei === null) this.#pixelStorei = [];
1318             this.#pixelStorei.push(key);
1319             this.#needupdate = true;
1320         } else if(this.#pixelStorei !== null){
1321             const i = this.#pixelStorei.indexOf(key);
1322             if(i === -1) return;
1323             this.#pixelStorei.splice(i, 1);
1324             this.#needupdate = true;
1325         }
1326     }
1327 
1328 }
1329 
1330 
1331 class MUS {
1332 
1333     static blendESs = [
1334         "FUNC_ADD", //source + destination (default value)
1335         "FUNC_SUBTRACT", //source - destination
1336         "FUNC_REVERSE_SUBTRACT", //destination - source
1337         "MIN", //Minimum of source and destination
1338         "MAX", //Maximum of source and destination
1339     ];
1340 
1341     static blendFSs = [
1342         "ZERO", //所有颜色乘 0
1343         "ONE",  //所有颜色乘 1
1344         "SRC_COLOR", //将所有颜色乘上源颜色
1345         "ONE_MINUS_SRC_COLOR", //每个源颜色所有颜色乘 1
1346         "DST_COLOR",  //将所有颜色与目标颜色相乘
1347         "ONE_MINUS_DST_COLOR", //将所有颜色乘以 1 减去每个目标颜色, 
1348         "SRC_ALPHA", //将所有颜色乘以源 alpha 值
1349         "ONE_MINUS_SRC_ALPHA", //将所有颜色乘以 1 减去源 alpha 值
1350         "DST_ALPHA", //将所有颜色与目标 alpha 值相乘
1351         "ONE_MINUS_DST_ALPHA", //将所有颜色乘以 1 减去目标 alpha 值
1352         "CONSTANT_COLOR", //将所有颜色乘以一个常数颜色
1353         "ONE_MINUS_CONSTANT_COLOR", //所有颜色乘以 1 减去一个常数颜色
1354         "CONSTANT_ALPHA", //将所有颜色乘以一个常数
1355         "ONE_MINUS_CONSTANT_ALPHA", //所有颜色乘以 1 减去一个常数
1356         "SRC_ALPHA_SATURATE", //将 RGB 颜色乘以源 alpha 值或 1 减去目标 alpha 值中的较小值。alpha 值乘以 1
1357     ];
1358 
1359     #blendEnable = false;
1360     get blendEnable() {return this.#blendEnable;}
1361     set blendEnable(v) {
1362         this.#blendEnable = typeof v === "boolean" ? v : false;
1363     }
1364 
1365     #blendC = {r: 0, g: 0, b: 0, a: 0};
1366     get blendC(){return this.#blendC;}
1367 
1368     #blendES = [BlendEquationAdd[0], BlendEquationAdd[1]];
1369     get blendES(){return this.#blendES;} //mode || modeRGB, modeAlpha; 值为: MUS.blendESs 的索引
1370 
1371     #blendFS = [BlendDefault[0], BlendDefault[1], BlendDefault[2], BlendDefault[3]];
1372     get blendFS(){return this.#blendFS;} //sfactor, dfactor || srcRGB, dstRGB, srcAlpha, dstAlpha; 值为: MUS.blendFSs 的索引
1373 
1374     //如果纹理属性发生改变将此值设为true,渲染器会重绘材质的纹理(纹理不适合频繁的修改, 用着色器实现动态纹理)
1375     //注意还要设置对应材质的.needupdate = true 才有效
1376     #needupdate = false; 
1377     get needupdate() {
1378         if(this.#needupdate === false) return false;
1379         this.#needupdate = false;
1380         return true;
1381     }
1382     set needupdate(v) {
1383         this.#needupdate = v;
1384     }
1385 
1386     /**
1387      * 设置内置的混合组合
1388      * @param {Array} v //值为带前缀 Blend* 的常量
1389      */
1390     setBlend(v){
1391         switch(v){
1392             default: return false;
1393             case BlendDefault: 
1394             case BlendAdd: 
1395             case BlendSub: 
1396             case BlendMultiply: 
1397             break;
1398         }
1399         Object.assign(this.#blendFS, v);
1400         return true;
1401     }
1402 
1403     /**
1404      * gl.blendFunc(sfactor, dfactor)
1405      * @param {number} sfactor //值为: MUS.blendFSs 的索引
1406      * @param {number} dfactor //值为: MUS.blendFSs 的索引
1407      */
1408     blendFunc(sfactor, dfactor) {
1409         this.#blendFS[0] = sfactor;
1410         this.#blendFS[1] = dfactor;
1411         this.#blendFS[2] = -1;
1412         this.#blendFS[3] = -1;
1413     }
1414 
1415     /**
1416      * //gl.blendFuncSeparate(srcRGB, dstRGB, srcAlpha, dstAlpha); 值为: MUS.blendFSs 的索引
1417      * @param {number} srcRGB 
1418      * @param {number} dstRGB 
1419      * @param {number} srcAlpha 
1420      * @param {number} dstAlpha 
1421      */
1422     blendFuncSeparate(srcRGB, dstRGB, srcAlpha, dstAlpha) {
1423         this.#blendFS[0] = srcRGB;
1424         this.#blendFS[1] = dstRGB;
1425         this.#blendFS[2] = srcAlpha;
1426         this.#blendFS[3] = dstAlpha;
1427     }
1428 
1429 }
1430 
1431 
1432 class Material extends MUS {
1433 
1434     #texture = null;
1435     get texture() {return this.#texture;}
1436 
1437     /**
1438      * @param {Texture} texture 
1439      * @param {boolean} blendEnable 
1440      */
1441     constructor(texture, blendEnable) {
1442         super();
1443         this.#texture = texture;
1444         this.blendEnable = blendEnable;
1445     }
1446 
1447 }
1448 
1449 
1450 /** MaterialShader
1451 demo: 
1452     const width = 256, height = 256;
1453     const geometry = new Geometry({
1454         aPosition: new Attribute(2, new Float32Array([
1455             width,0, 0,0, 0,height, 
1456             0,height, width,height, width,0,
1457         ])),
1458     }, width, height);
1459 
1460     const material = new MaterialShader({
1461         vertexCode: `#version 300 es
1462             in vec2 aPosition;
1463             uniform mat3 projectionMatrix;
1464             uniform mat3 modelMatrix;
1465             void main() {
1466                 gl_Position.xyz = projectionMatrix * modelMatrix * vec3(aPosition, 1.0);
1467                 gl_Position.w = 1.0;
1468             }
1469         `,
1470         fragmentCode: `#version 300 es
1471             precision mediump float; //highp, mediump, lowp
1472             uniform vec4 uColor;
1473             out vec4 outColor;
1474             void main() {
1475                 outColor = uColor;
1476             }
1477         `,
1478         uniforms: {
1479             projectionMatrix: renderer.projectionMatrix,
1480             modelMatrix: null, //这里够不到模型矩阵,先占个位
1481             uColor: [1, 0, 0, 1],
1482         },
1483     });
1484 
1485     const shader = new Object2D(geometry, material).translate(100, 300);
1486     material.uniforms.modelMatrix = shader.modelMatrix;
1487     renderer.append(shader).redraw();
1488 
1489     
1490     //这么做太麻烦了, 看下面这个: 
1491 
1492     const geometry1 = new GeometryRect(256, 256);
1493     const material1 = new MaterialShader({
1494         vertexCode: `#version 300 es
1495             in vec2 aPos;             //aPosition -> aPos 顶点属性
1496             uniform mat3 uPMat;     //projectionMatrix -> uPMat 投影矩阵
1497             uniform mat3 uMat;         //modelMatrix -> uMat 模型矩阵
1498             void main() {
1499                 gl_Position.xyz = uPMat * uMat * vec3(aPos, 1.0);
1500                 gl_Position.w = 1.0;
1501             }
1502         `,
1503         fragmentCode: `#version 300 es
1504             precision mediump float; //highp, mediump, lowp
1505             uniform vec4 uColor;
1506             out vec4 outColor;
1507             void main() {
1508                 outColor = uColor;
1509             }
1510         `,
1511         uniforms: {
1512             uColor: [1, 0, 0, 1],
1513         },
1514     });
1515 
1516     const shader1 = new Object2D(geometry1, material1).translate(100+256+10, 300);
1517     renderer.append(shader1).redraw();
1518 
1519     //每个模型的内置变量不一样(参考: defaultShaderCode), 这里只针对 Object2D;
1520     //Object2D 内置了1个属性, Geometry.attributes: {aPos: Attribute}
1521     //Object2D 内置了4个全局属性, .uniforms: {uPMat: [3x3], uMat: [3x3], uSize: [0, 0], uImage: Texture}
1522     //如果定义的着色器代码没有使用这些内置属性,渲染器在初始化它们时将自动丢弃掉
1523 
1524 
1525     //水波纹涟漪特效例子: 
1526 
1527     const materialShader = new MaterialShader({
1528         blending: BlendDefault,
1529         vertexCode: defaultShaderCode.texture1.vertex,
1530         fragmentCode: `#version 300 es
1531             precision mediump float; //highp, mediump, lowp
1532             uniform vec2 uSize;
1533             uniform sampler2D uImage;
1534             uniform vec2 uOrigin;
1535             uniform vec2 uRange;
1536             uniform float uScale;
1537             uniform float uLife;
1538             uniform float uTime;
1539             in vec2 vPos;
1540 
1541             out vec4 outColor;
1542             const float PI = 3.141592653589793;
1543 
1544             float atan2(float y, float x) {
1545                 if(x > 0.0){return atan(y / x);}
1546                 if(x < 0.0){
1547                     if(y >= 0.0){return atan(y / x) + PI;}
1548                     return atan(y / x) - PI;
1549                 }
1550                 if(y > 0.0){return PI;}
1551                 if(y < 0.0){return -PI;}
1552                 return 0.0;
1553             }
1554 
1555             void main() {
1556                 vec2 newPos = vPos - uOrigin;
1557                 float _d = newPos.x * newPos.x + newPos.y * newPos.y;
1558                 if(_d < 0.001 || _d < uRange.x * uRange.x || _d > uRange.y * uRange.y){
1559                     outColor = texture(uImage, vPos / uSize);
1560                 } else {
1561                     float d = sqrt((1.0 - uScale) * _d);
1562                     float r = atan2(vPos.y, vPos.x);
1563                     outColor = texture(uImage, (vPos + vec2(cos(r) * sin(d - uTime) / d, sin(r) * sin(d - uTime) / d) * uLife) / uSize);
1564                 }
1565             }
1566         `,
1567         uniforms: {
1568             uImage: new Texture(images[0], FormatRGBA),
1569             uOrigin: [innerWidth / 2, innerHeight / 2], //扩散原点
1570             uRange: [0, innerWidth], //0: 扩散最小半径, 1: 扩散最大半径;
1571             uScale: 0.993, //值越大波就越宽
1572             uLife: innerWidth, //值越大起伏就越大
1573             uTime: 0,
1574         },
1575     });
1576 */
1577 class MaterialShader extends MUS {
1578 
1579     /**
1580      * @param {{vertexCode: string, fragmentCode: string, uniforms: object, blending: Array}} option 
1581      */
1582     constructor(option) {
1583         super();
1584         this.vertexCode = option.vertexCode;
1585         this.fragmentCode = option.fragmentCode;
1586         this.uniforms = option.uniforms;
1587         this.blendEnable = this.setBlend(option.blending);
1588     }
1589 
1590 }
1591 
1592 
1593 /** Object2D
1594 demo: 
1595     const geometry = new GeometryRect(renderer.domElement.width, renderer.domElement.height);
1596     const texture = new Texture(images[0], FormatRGB);
1597     const material = new Material(texture, false);
1598     const background = new Object2D(geometry, material);
1599     renderer.append(background).redraw();
1600 */
1601 class Object2D {
1602 
1603     #geometry = null;
1604     get geometry() {
1605         return this.#geometry;
1606     }
1607 
1608     #material = null;
1609     get material() {
1610         return this.#material;
1611     }
1612 
1613     #mat3A = [];
1614     get modelMatrix() {return this.#mat3A;}
1615 
1616     #mat3 = null;
1617     #bbox = new Box();
1618     get x() {return this.#bbox.x;}
1619     get y() {return this.#bbox.y;}
1620 
1621     /**
1622      * 渲染器的常规成员 (复用它们: Geometry, Material, Texture, 如果这么做那么它们大部分东西都是共享的包括GPU上的缓存)
1623      * @param {Geometry} geometry 
1624      * @param {Material} material 
1625      */
1626     constructor(geometry, material) {
1627         this.#geometry = geometry || null;
1628         this.#material = material || null;
1629 
1630         this.#bbox.size(geometry.width, geometry.height);
1631         this.#mat3 = new Matrix3(this.#mat3A).makeTranslation(0, 0);
1632         this.visible = true;
1633     }
1634 
1635     translate(x, y) {
1636         this.#bbox.x += x;
1637         this.#bbox.y += y;
1638         this.#mat3.translate(x, y);
1639         return this;
1640     }
1641 
1642     rotate(r, ox = this.#bbox.w / 2, oy = this.#bbox.h / 2) {
1643         const cx = this.#bbox.x + ox,
1644         cy = this.#bbox.y + oy;
1645         this.#mat3.translate(-cx, -cy)
1646         .rotate(r).translate(cx, cy);
1647         return this;
1648     }
1649 
1650     scale(x, y, ox = this.#bbox.w / 2, oy = this.#bbox.h / 2) {
1651         const cx = this.#bbox.x + ox,
1652         cy = this.#bbox.y + oy;
1653         this.#mat3.translate(-cx, -cy)
1654         .scale(x, y).translate(cx, cy);
1655         return this;
1656     }
1657 
1658     setPosition(x, y) {
1659         this.#mat3.translate(x - this.#bbox.x, y - this.#bbox.y);
1660         this.#bbox.x = x;
1661         this.#bbox.y = y;
1662         return this;
1663     }
1664 
1665     containsPoint(x, y) {
1666         return this.#bbox.containsPoint(x, y);
1667     }
1668 
1669 }
1670 
1671 
1672 /** Sprite
1673 demo: 
1674     const geometry = new GeometryRect(renderer.domElement.width, renderer.domElement.height);
1675     const texture = new Texture(images[3], FormatRGB);
1676     const material = new Material(texture, false);
1677     const sprite = new Sprite(geometry, material, 8, 0);
1678     renderer.append(sprite).redraw();
1679     setInterval(() => {
1680         sprite.offset += 1; //sprite.offset += 0.1;
1681         renderer.redraw();
1682     }, 600);
1683 */
1684 class Sprite extends Object2D {
1685 
1686     #len = 1;
1687     get len() {return this.#len;}
1688 
1689     #offset = 0;
1690     get offset() {return this.#offset;}
1691     set offset(v) {this.#offset = v % this.#len;}
1692 
1693     /**
1694      * 雪碧图, 精灵 (暂只支持 x * 1 的雪碧图), 设置它 .offset 实时生效! 
1695      * @param {Geometry} geometry 
1696      * @param {Material} material 
1697      * @param {number} len //雪碧图x轴长度(图片的宽 / 每一格的宽)
1698      * @param {number} offset //雪碧图x轴位置, 浮点值, 0.0 至 len - 1 个为一个循环(offset % len)
1699      */
1700     constructor(geometry, material, len, offset = 0.0) {
1701         super(geometry, material);
1702         this.#len = Math.floor(Math.max(this.#len, len));
1703         this.offset = offset;
1704     }
1705 
1706 }
1707 
1708 
1709 /** Instanced
1710 demo: 
1711     const instanced = new Instanced(geos[2], mats[2], 5).translate(100, 100);
1712     for(let i = 0; i < instanced.len; i++){ //设置每一个实例的旋转
1713         instanced.rotateI(i, i / instanced.len);
1714     }
1715 
1716     renderer.append(instanced).redraw();
1717 */
1718 class Instanced extends Object2D {
1719 
1720     #frequentUpdate = false;
1721     get frequentUpdate() {return this.#frequentUpdate;}
1722 
1723     #needupdate = null;
1724     #needupdateI = [];
1725     get needupdateI() {return this.#needupdateI;}
1726     get needupdate() {return this.#needupdate;}
1727 
1728     #len = 0;
1729     get len() {return this.#len;}
1730 
1731     #matrixData = null;
1732     get matrixData() {return this.#matrixData;}
1733 
1734     #matrices = null;
1735     #matricesA = null;
1736     get matricesA() {return this.#matricesA;}
1737 
1738     #bboxs = null;
1739 
1740     /**
1741      * Object2D 的实例化版本
1742      * @param {Geometry} geometry 
1743      * @param {Material} material 
1744      * @param {number} len //实例的长度
1745      * @param {boolean} frequentUpdate //是否经常更新变换矩阵, 默认 false; (决定了变换矩阵数据在着色器中的缓存类型)
1746      */
1747     constructor(geometry, material, len, frequentUpdate) {
1748         super(geometry, material);
1749 
1750         len = Math.max(1, Math.floor(len));
1751         
1752         const matrixLen = 3 * 3, sizeByte = matrixLen * 4;
1753         this.#matrixData = new Float32Array(len * matrixLen);
1754         this.#matrices = new Array(len);
1755         this.#matricesA = new Array(len);
1756 
1757         this.#needupdate = new Array(len);
1758         this.#bboxs = new Array(len);
1759         const cx = geometry.width / 2, cy = geometry.height / 2;
1760 
1761         for(let i = 0, val; i < len; i++){
1762             val = new Float32Array(this.#matrixData.buffer, i * sizeByte, matrixLen);
1763             this.#matricesA[i] = val;
1764             this.#matrices[i] = new Matrix3(val).makeTranslation(0, 0);
1765             this.#needupdate[i] = false;
1766             this.#bboxs[i] = new Box(0, 0, cx, cy);
1767         }
1768 
1769         this.#len = len;
1770         this.#frequentUpdate = typeof frequentUpdate === "boolean" ? frequentUpdate : false;
1771     }
1772 
1773     translateI(i, x, y) {
1774         const bboxs = this.#bboxs[i];
1775         bboxs.x += x;
1776         bboxs.y += y;
1777         bboxs.w = this.x + bboxs.x + this.geometry.width / 2;
1778         bboxs.h = this.y + bboxs.y + this.geometry.height / 2;
1779         this.#matrices[i].translate(x, y);
1780         if(this.#needupdate[i] === false){
1781             this.#needupdate[i] = true;
1782             this.#needupdateI.push(i);
1783         }
1784         return this;
1785     }
1786 
1787     rotateI(i, x) {
1788         const bboxs = this.#bboxs[i];
1789         this.#matrices[i].translate(-bboxs.w, -bboxs.h)
1790         .rotate(x).translate(bboxs.w, bboxs.h);
1791         if(this.#needupdate[i] === false){
1792             this.#needupdate[i] = true;
1793             this.#needupdateI.push(i);
1794         }
1795         return this;
1796     }
1797 
1798     scaleI(i, x, y) {
1799         const bboxs = this.#bboxs[i];
1800         this.#matrices[i].translate(-bboxs.w, -bboxs.h)
1801         .scale(x, y)(bboxs.w, bboxs.h);
1802         if(this.#needupdate[i] === false){
1803             this.#needupdate[i] = true;
1804             this.#needupdateI.push(i);
1805         }
1806         return this;
1807     }
1808 
1809     containsPointI(x, y) {
1810         for(let i = this.#len; i <= 0; i++){
1811             if(this.#bboxs[i].containsPoint(x, y) === true) return i;
1812         }
1813         return -1;
1814     }
1815 
1816 }
1817 
1818 
1819 /** InstancedPoints
1820 demo: 
1821     const points = new InstancedPoints(geos[1], mats[1], 50000, false, 10);
1822     for(let i = 0; i < points.len; i++){ //每一个实例设置一个随机位置
1823         points.translateI(i, UTILS.random(0, innerWidth - points.geometry.width), UTILS.random(0, innerHeight - points.geometry.height));
1824     }
1825 
1826     renderer.append(points).redraw();
1827 */
1828 class InstancedPoints extends Instanced {
1829 
1830     /**
1831      * 几乎与 Instanced 一样, 就多了一个.pointSize 属性, 修改此属性实时生效!
1832      * @param {Geometry} geometry 
1833      * @param {Material} material 
1834      * @param {number} len 
1835      * @param {boolean} frequentUpdate 
1836      * @param {number} pointSize //每一个点的大小(可以是浮点数)
1837      */
1838     constructor(geometry, material, len, frequentUpdate, pointSize) {
1839         super(geometry, material, len, frequentUpdate);
1840         this.pointSize = pointSize;
1841     }
1842 
1843 }
1844 
1845 
1846 /** InstancedSprite
1847 demo: 
1848     const geometry = new GeometryRect(renderer.domElement.width, renderer.domElement.height);
1849     const texture = new Texture(images[3], FormatRGB);
1850     const material = new Material(texture, false);
1851     const sprite = new InstancedSprite(geometry, material, 5, false, 8);
1852     for(let i = 0; i < sprite.len; i++){ //每一个实例设置一个随机位置
1853         sprite.translateI(i, UTILS.random(0, innerWidth - sprite.geometry.width), UTILS.random(0, innerHeight - sprite.geometry.height));
1854     }
1855     renderer.append(sprite).redraw();
1856     setInterval(() => {
1857         sprite.offset += 1; //sprite.offset += 0.1;
1858         renderer.redraw();
1859     }, 600);
1860 */
1861 class InstancedSprite extends Instanced {
1862 
1863     #len1 = 1;
1864     get len1() {return this.#len1;}
1865 
1866     #offset = 0;
1867     get offset() {return this.#offset;}
1868     set offset(v) {this.#offset = v % this.#len1;}
1869 
1870     /**
1871      * Sprite 雪碧图的实例化版本, 设置它 .offset 实时生效! 
1872      * @param {Geometry} geometry 
1873      * @param {Material} material 
1874      * @param {number} len 
1875      * @param {boolean} frequentUpdate 
1876      * @param {number} len1 //雪碧图x轴长度(图片的宽 / 每一格的宽)
1877      * @param {number} offset //雪碧图x轴位置, 浮点值, 0.0 至 len1 - 1 个为一个循环(offset % len1)
1878      */
1879     constructor(geometry, material, len, frequentUpdate, len1, offset = 0.0) {
1880         super(geometry, material, len, frequentUpdate);
1881         this.#len1 = Math.floor(Math.max(this.#len1, len1));
1882         this.offset = offset;
1883     }
1884 
1885 }
1886 
1887 
1888 
1889 //此类对外部是完全隐藏, 保密的, 只由渲染器直接调用; 
1890 class Cache {
1891 
1892     constructor(gl, proName, pro, obj2d, mode) {
1893         this.gl = gl;
1894         this.proName = proName;
1895         this.pro = pro;
1896         this.obj2d = obj2d;
1897         this.mode = mode;
1898         this.geo = null; //CacheGeometry
1899         this.mat = null; //CacheMaterial
1900         this.texLocs = [];
1901         this.uniforms = [];
1902     }
1903 
1904     initUniforms(uniforms, matHad = false, texMap = new Map()) {
1905         const gl = this.gl;
1906         for(let n in uniforms){
1907             const loc = gl.getUniformLocation(this.pro.program, n);
1908             if(loc === null) continue;
1909 
1910             if(Texture.prototype.isPrototypeOf(uniforms[n]) === false){
1911                 this.uniforms.push(compileUniform(gl, loc, n, uniforms));
1912                 continue;
1913             }
1914 
1915             if(matHad === false){
1916                 let tex = texMap.get(uniforms[n]);
1917                 if(tex === undefined){
1918                     tex = new CacheTexture(gl, this.mat.textures.length, n, uniforms);
1919                     gl.activeTexture(tex.index);
1920                     gl.bindTexture(gl.TEXTURE_2D, tex._texture);
1921                     if(tex.texture.needupdate !== undefined) updateTexture(gl, tex.texture);
1922                     texMap.set(uniforms[n], tex);
1923                 }
1924                 tex.len++;
1925                 this.mat.textures.push(tex);
1926                 //this.uniforms.push(() => gl.uniform1i(loc, i));
1927             }
1928         }
1929 
1930         if(matHad === false) this.mat.lenT = this.mat.textures.length;
1931         for(let i = 0; i < this.mat.lenT; i++){
1932             this.texLocs[i] = gl.getUniformLocation(this.pro.program, this.mat.textures[i].name);
1933         }
1934     }
1935 
1936     dispose() {
1937         this.gl.deleteShader(this.pro.vertexShader);
1938         this.gl.deleteShader(this.pro.fragmentShader);
1939         this.gl.deleteProgram(this.pro.program);
1940     }
1941 
1942     draw() {
1943         if(this.geo.lenI === 0){
1944             this.gl.drawArrays(this.mode, 0, this.geo.lenV);
1945         } else {
1946             this.gl.drawElements(this.mode, this.geo.lenI, this.gl[this.geo.value.type], 0);
1947         }
1948     }
1949 
1950 }
1951 
1952 
1953 class CacheInstanced extends Cache {
1954 
1955     constructor(gl, proName, pro, instanced, mode) {
1956         super(gl, proName, pro, instanced, mode);
1957         
1958         this.matrixLoc = gl.getAttribLocation(pro.program, "uIMat");
1959         this.matrixBuffer = gl.createBuffer();
1960         gl.bindBuffer(gl.ARRAY_BUFFER, this.matrixBuffer); 
1961         gl.bufferData(gl.ARRAY_BUFFER, instanced.matrixData, gl[instanced.frequentUpdate === false ? "STATIC_DRAW" : "DYNAMIC_DRAW"]);
1962 
1963         instanced.needupdate.fill(false);
1964         instanced.needupdateI.length = 0;
1965         
1966         this.sizeByte = 3 * 3 * 4;
1967         this.instanced = instanced;
1968     }
1969 
1970     dispose() {
1971         this.gl.deleteBuffer(this.matrixBuffer);
1972         return super.dispose();
1973     }
1974 
1975     draw() {
1976         this.gl.bindBuffer(this.gl.ARRAY_BUFFER, this.matrixBuffer);
1977 
1978         const instanced = this.instanced;
1979         var n, v = instanced.needupdateI.length;
1980         
1981         if(v !== 0){ //需要上传矩阵
1982             if(v !== instanced.len){ //个别矩阵更新了
1983                 let i = 0;
1984                 for(n = 0; n < v; n++){
1985                     i = instanced.needupdateI[n];
1986                     instanced.needupdate[i] = false;
1987                     this.gl.bufferSubData(this.gl.ARRAY_BUFFER, i * this.sizeByte, instanced.matricesA[i], 0, 9); //9 = 3 * 3 = instanced.matricesA[i].length;
1988                 }
1989             } else { //所有矩阵都更新了
1990                 instanced.needupdate.fill(false);
1991                 this.gl.bufferSubData(this.gl.ARRAY_BUFFER, 0, instanced.matrixData);
1992             }
1993             instanced.needupdateI.length = 0;
1994         }
1995 
1996         for(n = 0; n < 3; n++){
1997             v = this.matrixLoc + n;
1998             this.gl.enableVertexAttribArray(v);
1999             this.gl.vertexAttribPointer(v, 3, this.gl.FLOAT, false, this.sizeByte, n * 12); //12 = 3 mat3 * 4 byte
2000             this.gl.vertexAttribDivisor(v, 1);
2001         }
2002     
2003         if(this.geo.lenI === 0){
2004             this.gl.drawArraysInstanced(this.mode, 0, this.geo.lenV, instanced.len);
2005         } else {
2006             this.gl.drawElementsInstanced(this.mode, this.geo.lenI, this.gl[this.geo.value.type], 0, instanced.len);
2007         }
2008     }
2009 
2010 }
2011 
2012 
2013 class CacheGeometry {
2014 
2015     constructor(gl, pro, geo) {
2016         this.lenV = 0;
2017         this.attributes = {};
2018         for(let n in geo.attributes){
2019             const loc = gl.getAttribLocation(pro.program, n);
2020             if(loc === -1) continue;
2021             const obj = compileBuffer(gl, loc, geo.attributes[n]);
2022             this.attributes[n] = obj;
2023             if(this.lenV === 0) this.lenV = obj.value.length / obj.size;
2024         }
2025 
2026         this.lenI = 0;
2027         this.indexBuffer = null;
2028         if(geo.indices !== null) {
2029             this.indexBuffer = gl.createBuffer();
2030             gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.indexBuffer);
2031             gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, geo.indices, gl.STATIC_DRAW);
2032             this.lenI = geo.indices.length;
2033         }
2034 
2035         this.len = 0;
2036         this.value = geo;
2037     }
2038 
2039     dispose(gl) {
2040         if(this.indexBuffer !== null){
2041             gl.deleteBuffer(this.indexBuffer);
2042         }
2043         for(let n in this.attributes){
2044             gl.deleteVertexArray(this.attributes[n].vao);
2045             gl.deleteBuffer(this.attributes[n].buffer);
2046         }
2047     }
2048 
2049 }
2050 
2051 
2052 class CacheMaterial {
2053 
2054     constructor(mat, texs = []) {
2055         this.textures = texs;
2056         this.lenT = texs.length;
2057         this.len = 0;
2058         this.value = mat;
2059     }
2060 
2061     dispose(gl) {
2062 
2063     }
2064 
2065 }
2066 
2067 
2068 class CacheTexture {
2069 
2070     constructor(gl, i, n, v) {
2071         this._texture = gl.createTexture();
2072         this.texture = v[n];
2073         this.name = n;
2074         this.index = gl["TEXTURE"+i];
2075         this.len = 0;
2076     }
2077 
2078     dispose(gl) {
2079         gl.deleteTexture(this._texture);
2080     }
2081 
2082 }
2083 
2084 
2085 /* Renderer WebGL2 2D渲染器
2086 未完的功能: 
2087     1 后期处理
2088     2 阴影
2089     3 渐变
2090 
2091 constructor: 
2092     空; 初始化选项都在 Renderer.contextOption .glOption 中自行修改
2093 
2094 attribute: 
2095     domElement: HTMLCanvasElement; //只读
2096     projectionMatrix: Array; //只读, 返回默认的3x3投影矩阵
2097 
2098 method: 
2099     append(object2d: Structure|InstancedPoints|Object2D...): this; //添加到渲染队列并创建缓存
2100     delete(object2d: Structure|InstancedPoints|Object2D...): this; //从渲染队列删除并释放缓存
2101     dispose(): undefined; //销毁 WebGL2RenderingContext, 销毁后此类无法在继续使用
2102     setSize(width, height): undefined; //设置了: 画布宽高, gl的视口, 投影矩阵;
2103     select(x, y: number): Object2D|null; //根据一个点来获取 Object2D
2104     redraw(): undefined; //重绘画布
2105     readPixels(box: Box, result: ImageSource): ImageSource; //截取像素; box.x,box.y: 距画布左上角的偏移量; result: 如果未定义则会创建一个新的 ImageSource；
2106 
2107 demo: 
2108     const renderer = new Renderer();
2109     renderer.setSize(innerWidth, innerHeight);
2110     document.body.appendChild(renderer.domElement);
2111 
2112     const geos = [
2113         new GeometryRect(256, 256), 
2114         new GeometryCircle(125), 
2115         new GeometryRectWavy(256, 256),
2116     ];
2117 
2118     const mats = [
2119         new Material(new Texture(images[0], FormatRGB), false), 
2120         new Material(new Texture(images[1], FormatRGBA), true), 
2121         new Material(new Texture(images[2], FormatRGB), false),
2122     ];
2123 
2124     renderer.domElement.addEventListener("click", e => {
2125         const geo = geos[Math.floor(UTILS.random(0, geos.length))]; //随机复用几何体
2126         const mat = mats[Math.floor(UTILS.random(0, mats.length))]; //随机复用材质
2127         const obj2d = new Object2D(geo, mat).translate(e.offsetX, e.offsetY);
2128     
2129         renderer.append(obj2d).redraw();
2130         setTimeout(() => renderer.delete(obj2d).redraw(), UTILS.random(5000, 15000));
2131     });
2132 
2133 
2134     //截取像素示例.readPixels():
2135     //Renderer.contextOption.preserveDrawingBuffer 必须为 true, 默认为false(开启可能会影响绘制性能), 否则结果会使一个黑图
2136     renderer.domElement.addEventListener("click", e => {
2137         const geo = new GeometryRect(256, 256);
2138         geo.translate(e.offsetX, e.offsetY);
2139 
2140         const source = renderer.readPixels(new Box(e.offsetX, e.offsetY, 256, 256));
2141         const mat = new Material(source);
2142         mat.setPixelStorei(PixelStoreiFlipY, true); //设置纹理预处理: 翻转像素y;
2143         
2144         renderer.append(new Object2D(geo, mat)).redraw();
2145     });
2146 
2147 
2148     //画布截屏
2149     //renderer.domElement.toBlob(ElementUtils.downloadFile, "image/png"); 
2150 
2151 
2152     //添加后期处理(会直接影响渲染性能)
2153     const geo = new GeometryRect(innerWidth, innerHeight);
2154     const materialShader = new MaterialShader({
2155         blending: BlendDefault, 
2156         vertexCode: defaultShaderCode.texture1.vertex,
2157         fragmentCode: `#version 300 es
2158             precision mediump float; //highp, mediump, lowp
2159             uniform sampler2D uImage;
2160             uniform vec2 uSize;
2161             in vec2 vPos;
2162             out vec4 outColor;
2163             void main() {
2164                 vec2 uv = vPos / uSize;
2165                 uv.y = 1.0 - uv.y; //翻转y
2166                 outColor = texture(uImage, uv);
2167             }
2168         `,
2169         uniforms: {
2170             //必须是 ImageSource, 并且第三个参数必须是null, 否则会创建失败
2171             uImage: new Texture(new ImageSource(geo.width, geo.height, null)), 
2172         },
2173     });
2174     renderer.createRenderTarget(new Object2D(geo, materialShader));
2175     renderer.redrawRenderTarget();
2176 */
2177 class Renderer {
2178 
2179     static contextOption = {
2180         alpha: false, //画布css的背景启用阿尔法 默认 true
2181         antialias: true, //抗锯齿 默认 true
2182         depth: false, //深度缓冲 默认 true
2183         desynchronized: true, //从事件循环中取消画布绘制周期的同步来减少延迟
2184         stencil: false, //模板缓冲 默认 false
2185         premultipliedAlpha: true,  //预乘阿尔法通道 默认 true
2186         preserveDrawingBuffer: false, //true: 保留绘图缓冲区 默认 false 
2187         failIfMajorPerformanceCaveat: true, //指示在系统性能较低时是否创建上下文
2188 
2189         powerPreference: "default", //指示哪种GPU配置适合于WebGL上下文。
2190         //可能的值是：
2191         //"default" 让用户代理决定哪个GPU配置最适合。这是默认值。
2192         //"high-performance" 将渲染性能优先于功耗。
2193         //"low-power" 将节能优先于渲染性能。
2194         
2195         xrCompatible: false,
2196     }
2197 
2198     static glOption = {
2199         clearColor: {r: 0.45, g: 0.45, b: 0.45, a: 1}, //gl的背景颜色(在画布css颜色之上)
2200     }
2201 
2202     #contextAttributes = {};
2203     #gl = createWebGL2();
2204     #pro = null;
2205 
2206     #states = {
2207         pro: null, 
2208         blendE: false,
2209         blendC: {r: -1, g: 0, b: 0, a: 0},
2210         blendES: [-1, 0],
2211         blendFS: [-1, 0, 0, 0],
2212     }
2213 
2214     #geometries = new Map();
2215     #materials = new Map();
2216     #textures = new Map();
2217     #objects = [];
2218     #caches = [];
2219 
2220     #frameBuffer = null;
2221     #renderBuffer = null;
2222     #objectsRT = [];
2223     #cachesRT = [];
2224     
2225     #projectionMatrix = new Matrix3();
2226     #projectionMatrixA = [];
2227     get projectionMatrix() {
2228         return this.#projectionMatrixA; //#projectionMatrix.toArray();
2229     }
2230 
2231     get lengthObject() {return this.#objects.length;}
2232     get lengthGeometry() {return this.#geometries.size;}
2233     get lengthMaterial() {return this.#materials.size;}
2234     get lengthTexture() {return this.#textures.size;}
2235 
2236     get domElement() {return this.#gl.canvas;}
2237 
2238     constructor() {
2239         Object.assign(this.#contextAttributes, this.#gl.getContextAttributes());
2240         this.#pro = {
2241             texture1: createProgram(this.#gl, defaultShaderCode.texture1.vertex, defaultShaderCode.texture1.fragment),
2242             texture1_sprite: createProgram(this.#gl, defaultShaderCode.texture1_sprite.vertex, defaultShaderCode.texture1_sprite.fragment),
2243             texture1_Instanced: createProgram(this.#gl, defaultShaderCode.texture1_Instanced.vertex, defaultShaderCode.texture1_Instanced.fragment),
2244             texture1_Instanced_points: createProgram(this.#gl, defaultShaderCode.texture1_Instanced_points.vertex, defaultShaderCode.texture1_Instanced_points.fragment),
2245             texture1_Instanced_sprite: createProgram(this.#gl, defaultShaderCode.texture1_Instanced_sprite.vertex, defaultShaderCode.texture1_Instanced_sprite.fragment),
2246         }
2247         initExtensions(this.#gl);
2248 
2249     }
2250     
2251     /**
2252      * @param {Object2D|Sprite|Instanced|InstancedPoints|InstancedSprite} object2d 
2253      * @returns {this}
2254      */
2255     append(object2d) {
2256         if(arguments.length === 1){
2257             if(this.#objects.includes(object2d) === true) return this;
2258 
2259             const obj = proHandler(this.#gl, this.#pro, this, object2d),
2260             cache = obj.cache;
2261             if(obj === null) return this;
2262             
2263             //
2264             cache.geo = this.#geometries.get(object2d.geometry);
2265             if(cache.geo === undefined){
2266                 cache.geo = new CacheGeometry(this.#gl, cache.pro, object2d.geometry);
2267                 this.#geometries.set(object2d.geometry, cache.geo);
2268             }
2269             cache.geo.len++;
2270             
2271             //
2272             cache.mat = this.#materials.get(object2d.material);
2273             const matHad = cache.mat !== undefined;
2274             if(matHad === false){
2275                 cache.mat = new CacheMaterial(object2d.material);
2276                 if(object2d.material.needupdate !== undefined) this.#materials.set(object2d.material, cache.mat);
2277             } else {
2278                 for(let i = 0; i < cache.mat.textures.length; i++) cache.mat.textures[i].len++;
2279             }
2280             cache.mat.len++;
2281             
2282             //
2283             cache.initUniforms(obj.uniforms, matHad, this.#textures);
2284             this.#caches.push(cache);
2285             this.#objects.push(object2d);
2286             return this;
2287         }
2288         
2289         for(let i = 0, arg = arguments; i < arg.length; i++) this.append(arg[i]);
2290 
2291         return this;
2292     }
2293 
2294     /**
2295      * @param {Object2D|Sprite|Instanced|InstancedPoints|InstancedSprite} object2d 
2296      * @returns {this}
2297      */
2298     delete(object2d) {
2299         if(arguments.length === 1){
2300             const i = this.#objects.indexOf(object2d);
2301             if(i === -1) return this;
2302             
2303             const gl = this.#gl, cache = this.#caches[i];
2304 
2305             this.#objects.splice(i, 1);
2306             this.#caches.splice(i, 1);
2307 
2308             if(!cache.proName || this.#pro[cache.proName] !== cache.pro){
2309                 cache.dispose(); //是自定义的着色器
2310             }
2311 
2312             cache.geo.len--;
2313             if(cache.geo.len === 0){
2314                 cache.geo.dispose(gl);
2315                 this.#geometries.delete(object2d.geometry);
2316             }
2317 
2318             cache.mat.len--;
2319             if(cache.mat.len === 0){
2320                 cache.mat.dispose(gl);
2321                 this.#materials.delete(object2d.material);
2322             }
2323 
2324             for(let i = 0, tex; i < cache.mat.textures.length; i++){
2325                 tex = cache.mat.textures[i];
2326                 tex.len--;
2327                 if(tex.len === 0){
2328                     tex.dispose(gl);
2329                     this.#textures.delete(tex.texture);
2330                 }
2331             }
2332             
2333             return this;
2334         }
2335         
2336         for(let i = 0, arg = arguments; i < arg.length; i++) this.delete(arg[i]);
2337 
2338         return this;
2339     }
2340 
2341     redraw() {
2342         const len = this.#caches.length;
2343         if(len === 0) return;
2344         
2345         const gl = this.#gl, states = this.#states;
2346         //gl.clear(gl.COLOR_BUFFER_BIT);
2347 
2348         for(let i = 0, v, n, t, g, m; i < len; i++){
2349             v = this.#caches[i];
2350             if(v.obj2d.visible !== true) continue;
2351 
2352             if(states.pro !== v.pro){
2353                 states.pro = v.pro;
2354                 gl.useProgram(states.pro.program);
2355             }
2356 
2357             if(g !== v.geo){
2358                 g = v.geo;
2359                 for(n in g.attributes) gl.bindVertexArray(g.attributes[n].vao);
2360                 if(g.lenI !== 0) gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, g.indexBuffer);
2361             }
2362 
2363             if(m !== v.mat || m.value.needupdate === true){
2364                 m = v.mat;
2365                 
2366                 if(states.blendE !== m.value.blendEnable){
2367                     states.blendE = m.value.blendEnable;
2368                     gl[states.blendE === true ? "enable" : "disable"](gl.BLEND);
2369                 }
2370 
2371                 if(states.blendE === true){
2372                     if(states.blendC.r !== m.value.blendC.r || 
2373                         states.blendC.g !== m.value.blendC.g || 
2374                         states.blendC.b !== m.value.blendC.b || 
2375                         states.blendC.a !== m.value.blendC.a){
2376                         Object.assign(states.blendC, m.value.blendC);
2377                         gl.blendColor(states.blendC.r, states.blendC.g, states.blendC.b, states.blendC.a);
2378                     }
2379         
2380                     if(states.blendES[0] !== m.value.blendES[0] ||
2381                         states.blendES[1] !== m.value.blendES[1]){ 
2382                         Object.assign(states.blendES, m.value.blendES);
2383                         if(states.blendES[0] !== -1){
2384                             if(states.blendES[1] === -1){
2385                                 gl.blendEquation(gl[MUS.blendESs[states.blendES[0]]]);
2386                             } else {
2387                                 gl.blendEquationSeparate(gl[MUS.blendESs[states.blendES[0]]], gl[MUS.blendESs[states.blendES[1]]]);
2388                             }
2389                         }
2390                     }
2391         
2392                     if(states.blendFS[0] !== m.value.blendFS[0] ||
2393                         states.blendFS[1] !== m.value.blendFS[1] || 
2394                         states.blendFS[2] !== m.value.blendFS[2] || 
2395                         states.blendFS[3] !== m.value.blendFS[3]){
2396                         Object.assign(states.blendFS, m.value.blendFS);
2397                         if(states.blendFS[0] !== -1){
2398                             if(states.blendFS[2] === -1){
2399                                 gl.blendFunc(gl[MUS.blendFSs[states.blendFS[0]]], gl[MUS.blendFSs[states.blendFS[1]]]);
2400                             } else {
2401                                 gl.blendFuncSeparate(gl[MUS.blendFSs[states.blendFS[0]]], gl[MUS.blendFSs[states.blendFS[1]]], gl[MUS.blendFSs[states.blendFS[2]]], gl[MUS.blendFSs[states.blendFS[3]]]);
2402                             }
2403                         }
2404                     }
2405                 }
2406 
2407                 for(n = 0; n < m.lenT; n++){
2408                     t = m.textures[n];
2409                     gl.bindTexture(gl.TEXTURE_2D, t._texture);
2410                     gl.activeTexture(t.index);
2411                     if(t.texture.needupdate === true) updateTexture(gl, t.texture);
2412                     gl.uniform1i(v.texLocs[n], n);
2413                 }
2414             } //else {
2415 
2416                 //for(n = 0; n < m.lenT; n++){
2417                     //gl.uniform1i(v.texLocs[n], n); //这玩意每个对象都会创建一个新的(即使材质或纹理都一样,因为它指向的是自己所用的 program)
2418                 //}
2419 
2420             //}
2421 
2422             t = v.uniforms.length;
2423             for(n = 0; n < t; n++) v.uniforms[n]();
2424             
2425             v.draw();
2426             //resetBuffers(gl);
2427         }
2428     }
2429     
2430     dispose() {
2431         this.#caches.length = 0;
2432         this.#geometries.clear();
2433         this.#materials.clear();
2434         this.#textures.clear();
2435         if(this.#gl.isContextLost() === false){
2436             this.#gl.loseContext();
2437         }
2438         this.#gl = null;
2439     }
2440 
2441     setSize(width = innerWidth, height = innerHeight) {
2442         width *= window.devicePixelRatio;
2443         height *= window.devicePixelRatio;
2444         this.domElement.width = width;
2445         this.domElement.height = height;
2446         this.#gl.viewport(0, 0, width, height);
2447         this.#projectionMatrix.projection(width, height);
2448         this.#projectionMatrix.toArray(this.#projectionMatrixA);
2449     }
2450 
2451     select(x = 0, y = 0, targets = this.#objects) {
2452         for(let i = targets.length - 1, obj2d; i >= 0; i--){
2453             obj2d = targets[i];
2454             if(obj2d.visible === true && obj2d.containsPoint(x, y) === true) return obj2d;
2455         }
2456         return null;
2457     }
2458 
2459     readPixels(box = new Box(0, 0, 100, 100), result = new ImageSource(box.w, box.h)) {
2460         const y = (1 - box.y / this.domElement.height) * this.domElement.height - box.h;
2461         this.#gl.readPixels(box.x, y, box.w, box.h, this.#gl.RGBA, this.#gl.UNSIGNED_BYTE, result.data);
2462         return result;
2463     }
2464 
2465     /**
2466      * @param {Object2D|Sprite|Instanced|InstancedPoints|InstancedSprite} object2d 
2467      */
2468     createRenderTarget(object2d) {
2469         if(this.#cachesRT.length > 0) return console.warn("Renderer.createRenderTarget(): 创建失败! 已存在");
2470 
2471         const objects = this.#objects, caches = this.#caches;
2472         this.#objects = this.#objectsRT;
2473         this.#caches = this.#cachesRT;
2474 
2475         this.append(object2d);
2476         const cache = this.#caches[0];
2477         
2478         if(cache === undefined || 
2479             cache.mat.textures.length === 0 || 
2480             ImageSource.prototype.isPrototypeOf(cache.mat.textures[0].texture.source) === false || 
2481             cache.mat.textures[0].texture.source.data !== null){
2482             this.delete(object2d);
2483             console.warn("Renderer.createRenderTarget(): 创建失败! 参数错误");
2484         } else {
2485             const gl = this.#gl;
2486             const frameBuffer = gl.createFramebuffer();
2487             gl.bindFramebuffer(gl.FRAMEBUFFER, frameBuffer);
2488             gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, cache.mat.textures[0]._texture, 0);
2489             gl.bindFramebuffer(gl.FRAMEBUFFER, null);
2490             this.#frameBuffer = frameBuffer;
2491         }
2492         
2493         this.#objects = objects;
2494         this.#caches = caches;
2495     }
2496 
2497     redrawRenderTarget() {
2498         this.#gl.bindFramebuffer(this.#gl.FRAMEBUFFER, this.#frameBuffer);
2499         this.redraw();
2500         this.#gl.bindFramebuffer(this.#gl.FRAMEBUFFER, null);
2501 
2502         const objects = this.#objects, caches = this.#caches;
2503         this.#objects = this.#objectsRT;
2504         this.#caches = this.#cachesRT;
2505         this.redraw();
2506         this.#objects = objects;
2507         this.#caches = caches;
2508     }
2509 
2510 }
2511 
2512 
2513 export { 
2514     defaultShaderCode, 
2515 
2516     BlendEquationAdd, 
2517 
2518     BlendDefault, 
2519     BlendAdd,
2520     BlendSub,
2521     BlendMultiply,
2522 
2523     FormatAlpha,
2524     FormatLuminance,
2525     FormatLuminanceAlpha,
2526     FormatRGB,
2527     FormatRGBA,
2528 
2529     PixelStoreiFlipY, 
2530     PixelStoreiPremultiplyAlpht,
2531 
2532     Attribute, 
2533     Geometry, 
2534     GeometryRect, 
2535     GeometryCircle,
2536     GeometryShape, 
2537     GeometryRectWavy, 
2538 
2539     ImageSource, 
2540     Texture, 
2541     Material, 
2542     MaterialShader, 
2543 
2544     Object2D, 
2545     Sprite, 
2546     Instanced, 
2547     InstancedPoints, 
2548     InstancedSprite, 
2549 
2550     Renderer, 
2551 }

Renderer 源码

posted @ 2024-08-03 00:41 鸡儿er 阅读(146) 评论(0) 编辑收藏举报

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