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chpt-7-5-shadowMapEnabled.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>光与影-阴影</title>
<script type="text/javascript" src="js/three.js"></script>
</head>
<body onload="init()">
<script>
function init(){
var renderer, sence, camera, light;
renderer = new THREE.WebGLRenderer();
renderer.setSize(800, 600);
document.getElementsByTagName('body')[0].appendChild(renderer.domElement);
//设置渲染器的背景色
renderer.setClearColor(0x000000);
//告诉渲染器要渲染阴影
renderer.shadowMapEnabled = true;
renderer.shadowMapSoft = true;
scene = new THREE.Scene();
camera = new THREE.OrthographicCamera(-2, 2, 1.5, -1.5, 1, 10);
camera.position.set(3, 3, 6);
camera.lookAt(new THREE.Vector3(0, 0, 0));
scene.add(camera);
//在Three.js中，能形成阴影的光源只有THREE.DirectionalLight与THREE.SpotLight；
//而相对地，能表现阴影效果的材质只有THREE.LambertMaterial与THREE.PhongMaterial。因而在设置光源和材质的时候，一定要注意这一点。
var plane = new THREE.Mesh(new THREE.PlaneGeometry(8, 8, 16, 16),
new THREE.MeshLambertMaterial({color: 0xcccccc}));
plane.rotation.x = -Math.PI / 2;
plane.position.y = -1;
plane.receiveShadow = true;
scene.add(plane);
cube = new THREE.Mesh(new THREE.CubeGeometry(1, 1, 1),
new THREE.MeshLambertMaterial({color: 0x00ff00}));
cube.position.x = 1;
cube.castShadow = true;
scene.add(cube);
var light = new THREE.SpotLight(0xffff00, 1, 100, Math.PI / 6, 25);
light.position.set(2, 5, 3);
light.target = cube;
light.castShadow = true;
light.shadowCameraNear = 2;
light.shadowCameraFar = 10;
light.shadowCameraFov = 30;
light.shadowCameraVisible = true;
light.shadowMapWidth = 1024;
light.shadowMapHeight = 1024;
light.shadowDarkness = 0.3;
scene.add(light);
renderer.render(scene, camera);
}
</script>
</body>
</html>