as3种常见物理效果公式
as3种常见的弹性效果公式以及波形运动等as3动画效果公式代码整理,包括AS3的进制转换颜色提取等效果:
AS3缓动公式:
sprite.x += (targetX – sprite.x) * easing;//easing为缓动系数变量 sprite.y += (targetY – sprite.y) * easing;
AS3弹性公式:
vx += (targetX – sprite.x) * spring;//spring为弹性系数
vy += (targetY – sprite.y) * spring;
sprite.x += (vx *= friction);//friction为摩擦力
sprite.y += (vy *= friction);
AS3偏移弹性公式:
var dx:Number = sprite.x – fixedX;
var dy:Number = sprite.y – fixedY;
var angle:Number = Math.atan2(dy, dx);
var targetX:Number = fixedX + Math.cos(angle) * springLength;
var targetY:Number = fixedX + Math.sin(angle) * springLength;
AS3向鼠标旋转(或向某点旋转)
dx = mouseX – sprite.x;
dy = mouseY – sprite.y;
sprite.rotation = Math.atan2(dy, dx) * 180 / Math.PI;
AS3波形运动:
public function onEnterFrame1(event:Event):void {
ball.y=centerScale+Math.sin(angle)*range;
angle+=speed;
}
心跳:
public function onEnterFrame1(event:Event):void {
ball.scaleX=centerScale+Math.sin(angle)*range;
ball.scaleY=centerScale+Math.sin(angle)*range;
angle+=speed;
}
AS3圆心旋转:
public function onEnterFrame(event:Event):void {
ball.x=centerX+Math.cos(angle)*radius;
ball.y=centerY+Math.sin(angle)*radius;
angle+=speed;
}
椭圆旋转:
public function onEnterFrame(event:Event):void {
ball.x=centerX+Math.cos(angle)*radiusX;
ball.y=centerY+Math.sin(angle)*radiusY;
angle+=speed;
}
AS3颜色运算得到透明值:
var t:uint=0x77ff8877
var s:uint=0xff000000
var h:uint=t&s
var m:uint=h>>>24
trace(m)
AS3转换为十进制:
trace(hexValue);
AS3十进制转换为十六进制:
decimalValue.toString(16)
AS3颜色提取:
red = color24 >> 16;
green = color24 >> 8 & 0xFF;
blue = color24 & 0xFF;
alpha = color32 >> 24;
red = color32 >> 16 & 0xFF;
green = color32 >> 8 & 0xFF;
blue = color232 & 0xFF;
AS3按位计算得到颜色值:
color24 = red << 16 | green << 8 | blue;
color32 = alpha << 24 | red << 16 | green << 8 | blue;
posted on 2012-05-31 14:12 elvis.zhang 阅读(659) 评论(0) 编辑 收藏 举报