Three.js，WebGL對象位置

Question

我正在使用WebGl Three.js。 誰能告訴我我在做什么錯？ 我嘗試獲取定制網格的位置。 無論我嘗試哪種方法，每次我得到值（0,0,0）。

沒有一種方法對我有用：

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

這是我的代碼：

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

為什么您說它不起作用？

整個網格的位置為0,0,0。 要更改它，請嘗試更改squareMesh.position屬性。