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chpt-4-4-MeshNormalMaterial.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>材质-法向材质 </title>
<script type="text/javascript" src="js/three.js"></script>
</head>
<body onload="init()">
<script>
function init(){
var renderer, camera, scene, light;
renderer = new THREE.WebGLRenderer();
renderer.setSize(800, 600);
document.getElementsByTagName('body')[0].appendChild(renderer.domElement);
scene = new THREE.Scene();
camera = new THREE.OrthographicCamera(-2, 2, 1.5, -1.5, 1, 10);
//下面我们只改变照相机位置，观察两个角度的颜色变化：
//camera.position.set(3, 3, 6);
camera.position.set(3, 3, -8);
camera.lookAt(new THREE.Vector3(0, 0, 0));
scene.add(camera);
//创建平行光
light = new THREE.DirectionalLight();
light.position.set(2, 5, 3);
scene.add(light);
/**
*法向材质可以将材质的颜色设置为其法向量的方向，有时候对于调试很有帮助。法向材质的设定很简单，甚至不用设置任何参数：
*new THREE.MeshNormalMaterial()
*材质的颜色与照相机与该物体的角度相关
*/
var greenCube = new THREE.Mesh(new THREE.CubeGeometry(0.4, 0.4, 0.4),new THREE.MeshNormalMaterial());
greenCube.position.x = 1.3;
scene.add(greenCube);
var cube3 = new THREE.Mesh(new THREE.SphereGeometry(0.4,20,20),new THREE.MeshNormalMaterial());
cube3.position.y = 1;
scene.add(cube3);
renderer.render(scene, camera);
}
</script>
</body>
</html>