如何在three.js中创建带有法线和UV的动态网格？

Question

我知道如何在three.js中动态创建网格，但是如何在网格中添加自定义的UV和法线并不清楚。以下是创建自定义网格的方法，请问如何通过编程方式向该网格添加UV和法线？

谢谢！

var imgTexture = THREE.ImageUtils.loadTexture(image);
var avatarGeom = new THREE.Geometry();

avatarGeom.vertices.push(new THREE.Vector3(0.895813,0.732893,0));
avatarGeom.vertices.push(new THREE.Vector3(-1.007173,0.732893,0));
avatarGeom.vertices.push(new THREE.Vector3(0.895813,-1.390674,0));
avatarGeom.vertices.push(new THREE.Vector3(-1.007173,-1.390674,0));

var face = new THREE.Face3(2,3,1);
avatarGeom.faces.push(face);

face = new THREE.Face3(0,2,1);
avatarGeom.faces.push(face);

var avatar = new THREE.Mesh(avatarGeom,new THREE.MeshLambertMaterial(imgTexture));
avatar.doubleSided = true;
scene.add(avatar);

- JayDee

Answer 1

普通的面放在face中。UV坐标放在geometry中。

var imgTexture = THREE.ImageUtils.loadTexture(image);
var avatarGeom = new THREE.Geometry();

avatarGeom.vertices.push(new THREE.Vector3(0.895813,0.732893,0));
avatarGeom.vertices.push(new THREE.Vector3(-1.007173,0.732893,0));
avatarGeom.vertices.push(new THREE.Vector3(0.895813,-1.390674,0));
avatarGeom.vertices.push(new THREE.Vector3(-1.007173,-1.390674,0));

var face = new THREE.Face3(2,3,1);
face.normal.set(0,0,1); // normal
avatarGeom.faces.push(face);
avatarGeom.faceVertexUvs[0].push([new THREE.UV(1,1),new THREE.UV(0,1),new THREE.UV(1,0)]); // uvs

face = new THREE.Face3(0,2,1);
face.normal.set(0,0,1); // normal
avatarGeom.faces.push(face);
avatarGeom.faceVertexUvs[0].push([new THREE.UV(0,0),new THREE.UV(1,1),new THREE.UV(1,0)]); // uvs

var avatar = new THREE.Mesh(avatarGeom,new THREE.MeshLambertMaterial(imgTexture));
avatar.doubleSided = true;
scene.add(avatar);

UV贴图放在几何体中的原因是，这样我们可以拥有不同的通道（同一几何体的不同UV集）。

- mrdoob