threejs两个向量旋转 一个向量绕零一个向量旋转一个角度后的向量计算

threejs向量旋转

threejs一个向量绕另一个向量旋转

threejs向量变换

 

var v3 = new THREE.Vector3(0,1,1);
var v1 = new THREE.Vector3(1,0,0);
var v2 = new THREE.Vector3(1,1,0);
var v4 = new THREE.Vector3(0,0,1);
var angle1 = v1.angleTo(v2);  //
var angle2 = v2.angleTo(v1);  //

console.log(angle1);
console.log(angle2);


var v32 = v3.cross(v2);
console.log( v1.x + ' ' + v1.y + ' ' + v1.z );
console.log( v2.x + ' ' + v2.y + ' ' + v2.z );
console.log( v3.x + ' ' + v3.y + ' ' + v3.z );
console.log(v32);

var t1 = v1.normalize();
console.log(t1);

var t2 = v1.angleTo(v2);
console.log(t2);

var v12 = v1.cross(v4);
console.log(v12);

 

0.7853981633974484
0.7853981633974484
175 1 0 0
176 1 1 0
177 -1 1 -1
Vector3 {x: -1, y: 1, z: -1}
Vector3 {x: 1, y: 0, z: 0}
0.7853981633974484
Vector3 {x: 0, y: -1, z: 0}

 

 

 

threejs一个向量绕零一个向量旋转一个角度后的向量计算

var v_3 = new THREE.Vector3(1,0,0);
var v_4 = new THREE.Vector3(0,0,1);

var v_34 = v_3.applyAxisAngle(v_4,45.0 * Math.PI / 180.0);
console.log(v_34);
console.log(Math.round((v_34.x + Number.EPSILON) * 100) / 100);

 

{
    "x": 0.7071067811865475,
    "y": 0.7071067811865476,
    "z": 0
}

 

 

 

 

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