求两个tris - ThreeJS的中心点

// 假设我们有两个三角形的顶点坐标
var tris1 = [
  new THREE.Vector3(0, 0, 0),
  new THREE.Vector3(1, 0, 0),
  new THREE.Vector3(0, 1, 0)
];

var tris2 = [
  new THREE.Vector3(1, 1, 0),
  new THREE.Vector3(2, 1, 0),
  new THREE.Vector3(1, 2, 0)
];

// 计算第一个三角形的中心点
var center1 = new THREE.Vector3();
center1.addVectors(tris1[0], tris1[1]);
center1.add(tris1[2]).divideScalar(3);

// 计算第二个三角形的中心点
var center2 = new THREE.Vector3();
center2.addVectors(tris2[0], tris2[1]);
center2.add(tris2[2]).divideScalar(3);

// 打印中心点的坐标
console.log("第一个三角形的中心点：", center1);
console.log("第二个三角形的中心点：", center2);