Three.js，WebGl对象位置

Question

我正在使用WebGl，Three.js。 谁能告诉我我做错了什么？我试图得到我自定义网格的位置。每次我得到值（0,0,0），无论我尝试什么方法。

的方法不工作对我来说：

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

这里是我的代码：

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

为什么你说这是行不通的？

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