Three.js，WebGL对象位置

Question

我正在使用WebGl Three.js。 谁能告诉我我在做什么错？ 我尝试获取定制网格的位置。 无论我尝试哪种方法，每次我得到值（0,0,0）。

没有一种方法对我有用：

• vector.getPositionFromMatrix（matrix）;
• obj.matrix.getPosition（）。X

这是我的代码：

squareGeometry = new THREE.Geometry();
squareGeometry.vertices.push(new THREE.Vector3( this.x, this.y, this.z));
squareGeometry.vertices.push(new THREE.Vector3( this.x + this.w, this.y, this.z));
squareGeometry.vertices.push(new THREE.Vector3( this.x + this.w, this.y - this.h, this.z));
squareGeometry.vertices.push(new THREE.Vector3( this.x, this.y - this.h, this.z));
squareGeometry.faces.push(new THREE.Face4(0, 1, 2, 3));

squareMaterial = new THREE.MeshBasicMaterial({
color:this.color,
side:THREE.DoubleSide
});

squareMesh = new THREE.Mesh(squareGeometry, squareMaterial);

scene.add(squareMesh);
squareMesh.updateMatrix()
scene.updateMatrixWorld();

vec = new THREE.Vector3();
matrix = squareMesh.matrix;
localPosition = squareMesh.position; // 0,0,0
worldPosition = vec.getPositionFromMatrix( matrix ); // 0,0,0

// this also doesnt work 
squareMesh.matrix.getPosition().x // 0

Answer 1

为什么您说它不起作用？

整个网格的位置为0,0,0。 要更改它，请尝试更改squareMesh.position属性。