Math 在连接顶点的边上创建中点'；一个物体在三个物体中的位置

向量3中的给定顶点数组 平方向量3[{-1,1,0}，{1,1,0}，{-1，-1,0}，{1，-1,0}] 有没有办法修改矩阵并返回4个Verctor

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如果我没弄错，那么：

var angle = Math.PI / 4; // rotate 45 deg CCW, negative angle is CW
var m = new THREE.Matrix4();
m.set(
   Math.cos(angle), Math.sin(angle), 0, 0,
  -Math.sin(angle), Math.cos(angle), 0, 0,
   0              , 0              , 1, 0,
   0              , 0              , 0, Math.sqrt(2) // diagonal length is square root of 2 times of side length
);

var originals = [
  new THREE.Vector3(-1,  1, 0),
  new THREE.Vector3( 1,  1, 0),
  new THREE.Vector3(-1, -1, 0),
  new THREE.Vector3( 1, -1, 0)
];

function applyMatrix(points, matrix4){
  var result = [];
  points.forEach((point)=>{
    result.push(point.clone().applyMatrix4(matrix4));
  })
  return result;
}

var images = applyMatrix(originals, m);

示例r86

PS该解决方案与您在图片中给出的结果非常吻合