threejs第十七用 merge合并

merge可以合并一些属性顶点位置 uv。。来提升性能

不过 好像不能合并纹理 。

var geometry = new THREE.Geometry();
var material = new THREE.MeshLambertMaterial({ color: 0xf33f66 })
var g = new THREE.BoxGeometry(2, 2, 2);
var m = new THREE.MeshLambertMaterial({ color: 0xffff66 })
var cube2=new THREE.Mesh(g,m);
        cube2.updateMatrix();
        geometry.merge(cube2.geometry,cube2.matrix);

var cube3=new THREE.Mesh(g,m);
        cube3.position.x+=3;
        cube3.updateMatrix();//这个用来把合并前的变换矩阵带进geometry保证对象合并后正确的变换
        geometry.merge(cube3.geometry,cube3.matrix);
var cube= new THREE.Mesh(geometry,material);
    cube.position.z-=5;
    scene.add(cube);

就这样就把cube2 cube3 合并了