图片纹理

maya中的UV测试

uv就是把物体的表面全部展开，添加图片，像皮肤一样
这边我加载一个png图片

分割六个面，组合图片

THREE中的纹理构造函数

THREE.Texture(image,mapping,wrapS,wrapT,magFilter,minFilter,format,type,anisotropy);

为平面赋予纹理二维UV坐标

            geometry.vertices[0].uv=new THREE.Vector2(0,0);
            geometry.vertices[1].uv=new THREE.Vector2(1,0);
            geometry.vertices[2].uv=new THREE.Vector2(1,1);
            geometry.vertices[3].uv=new THREE.Vector2(0,1);//逆时针

loadertexture函数

            var texture=THREE.ImageUtils.loadTexture("M.png",null,function (t) {
            });//加载图片

指定材质纹理映射

            var material=new THREE.MeshBasicMaterial({map:texture});//纹理映射
            mesh = new THREE.Mesh( geometry,material);

代码重构

1.渲染背景橙黄色0xfd971f，背景颜色。

renderer.setClearColor(0xfd971f, 1.0);//橙黄色背景利于观察正方体

2.透视相机就位

        var camera;
        function initCamera() {
        camera = new THREE.PerspectiveCamera(120, width/height, 1, 1000);
        camera.position.x = 0;
        camera.position.y = 0;
        camera.position.z = 700;
        camera.up.x = 0;//相机朝向位置
        camera.up.y = 1;
        camera.up.z = 0;
        camera.lookAt(new THREE.Vector3(0,0,0));
        }

3.白色环境光就位

        function initLight() {
            var light=new THREE.AmbientLight(0xffffff);//白色环境光，无处不在
            var light_help=new THREE.SphereGeometry(16,16,16);
            light.add(new THREE.Mesh(light_help,new THREE.MeshBasicMaterial({color:0xffffff})));//白色
            scene.add(light);
        }

4.创建box

        var mesh=null;//全局变量
        function initObject() {
            var geometry = new THREE.CubeGeometry(300,300,300);//几何体
            var material = new THREE.MeshLambertMaterial( { color:0xFFFFFF} );//白色
            mesh = new THREE.Mesh( geometry,material);
            mesh.position = new THREE.Vector3(0,0,0);
            scene.add(mesh);
        }

5.纹理贴图准备,重构几何体材质代码

        var mesh=null;//全局变量
        function initObject() {
            var geometry = new THREE.CubeGeometry(300,300,300);//几何体
            geometry.vertices[0].uv=new THREE.Vector2(0,0);
            geometry.vertices[1].uv=new THREE.Vector2(1,0);
            geometry.vertices[2].uv=new THREE.Vector2(1,1);
            geometry.vertices[3].uv=new THREE.Vector2(0,1);
            var texture=THREE.ImageUtils.loadTexture("demo1.jpg",null,function (t) {
            });
            var material=new THREE.MeshBasicMaterial({map:texture});//纹理映射
            //var material = new THREE.MeshLambertMaterial( { color:0xFFFFFF} );//白色
            mesh = new THREE.Mesh( geometry,material);
            mesh.position = new THREE.Vector3(0,0,0);
            scene.add(mesh);
        }

6.为了利于观察，循环渲染加上box旋转

        function animation()
        {
            mesh.rotation.y+=0.01;//绕y轴旋转
            renderer.render(scene, camera);
            requestAnimationFrame(animation);//递归调用
            stats.update();//fps
        }

测试的图片纹理

ok，奈斯运行看效果！

没问题！