方向光
2019-11-11 本文已影响0人
Codifier
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Directional Light</title>
<script src="../../three-part/threejs/three.js"></script>
<script src="../../three-part/utils/stats.min.js"></script>
<script src="../../three-part/utils/dat.gui.min.js"></script>
<script src="../controls/TrackballControls.js"></script>
<script src="../util/util.js"></script>
<style>
body {
margin: 0;
overflow: hidden;
}
</style>
</head>
<body>
<div id="container"></div>
<script type="text/javascript">
init();
function init() {
// show FPS
let stats = initStats();
// resize
window.addEventListener('resize', onResize, false);
let scene = new THREE.Scene();
let camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);
camera.position.x = -30;
camera.position.y = 40;
camera.position.z = 30;
camera.lookAt(scene.position);
let renderer = new THREE.WebGLRenderer();
renderer.setClearColor(new THREE.Color(0x000000));
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.shadowMap.enabled = true;
document.getElementById("container").appendChild(renderer.domElement);
// init trackball control
let trackballControls = initTrackballControls(camera, renderer);
let clock = new THREE.Clock();
// add a plane
let planeGeometry = new THREE.PlaneGeometry(60, 60, 1, 1);
let planeMaterial = new THREE.MeshLambertMaterial({
color: 0xffffff
});
let plane = new THREE.Mesh(planeGeometry, planeMaterial);
plane.receiveShadow = true;
plane.rotation.x = -0.5 * Math.PI;
scene.add(plane);
// add a sphere
let sphereGeometry = new THREE.SphereGeometry(4, 20, 20);
let sphereMatrial = new THREE.MeshLambertMaterial({
color : 0xff0000
});
let sphere = new THREE.Mesh(sphereGeometry, sphereMatrial);
sphere.position.set(0, 4, 2);
sphere.castShadow = true;
scene.add(sphere);
// add directional light
/**
* DirectionalLight( color : Integer, intensity : Float )
* color - (optional) hexadecimal color of the light. Default is 0xffffff (white).
* intensity - (optional) numeric value of the light's strength/intensity. Default is 1.
* @type {DirectionalLight}
*/
let directionalLight = new THREE.DirectionalLight("#ff5808");
directionalLight.position.set(-20, 30, -5);
directionalLight.intensity = 0.5;
directionalLight.castShadow = true;
// orthographic camera
directionalLight.shadow.camera.near = 2;
directionalLight.shadow.camera.far = 80;
directionalLight.shadow.camera.left = -30;
directionalLight.shadow.camera.right = 30;
directionalLight.shadow.camera.top = 30;
directionalLight.shadow.camera.bottom = -30;
directionalLight.shadow.mapSize.width = 1024;
directionalLight.shadow.mapSize.height = 1024;
scene.add(directionalLight);
// add directional light helper
let helper = new THREE.DirectionalLightHelper(directionalLight);
scene.add(helper);
// attributes which can be modified in GUI
const controls = {
"color" : directionalLight.color.getStyle(),
"intensity" : directionalLight.intensity,
"castShadow" : true
};
// init GUI
initGUI();
renderScene();
function initGUI(){
let gui = new dat.GUI();
gui.addColor(controls, 'color').onChange(function (e) {
directionalLight.color = new THREE.Color(e);
});
gui.add(controls, 'intensity', 0, 5).onChange(function (e) {
directionalLight.intensity = e;
});
gui.add(controls, 'castShadow').onChange(function (e) {
directionalLight.castShadow = e;
});
}
function onResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
function renderScene(){
trackballControls.update(clock.getDelta());
stats.update();
requestAnimationFrame(renderScene);
renderer.render(scene, camera);
}
}
</script>
</body>
</html>
运行结果：
