环境光
2019-11-11 本文已影响0人
Codifier
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Ambient 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 ambient light
/**
* AmbientLight( color : Integer, intensity : Float )
* color - (optional) Numeric value of the RGB component of the color. Default is 0xffffff.
* intensity - (optional) Numeric value of the light's strength/intensity. Default is 1.
*/
let ambientLight = new THREE.AmbientLight("#606008", 1);
scene.add(ambientLight);
// add spotlight
let spotLight = new THREE.SpotLight(0xffffff, 1, 180, Math.PI / 4);
spotLight.shadow.mapSize.set(2048, 2048);
spotLight.position.set(-30, 40, -10);
spotLight.castShadow = true;
scene.add(spotLight);
// add a plane
let planeGeometry = new THREE.PlaneGeometry(60, 40, 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 : 0x7777ff
});
let sphere = new THREE.Mesh(sphereGeometry, sphereMatrial);
sphere.position.set(0, 4, 2);
sphere.castShadow = true;
scene.add(sphere);
// attributes which can be modified in GUI
const controls = {
"intensity" : ambientLight.intensity,
"ambientColor" : ambientLight.color.getStyle(),
"disableSpotlight" : false
};
// init GUI
initGUI();
renderScene();
function initGUI(){
let gui = new dat.GUI();
gui.add(controls, 'intensity', 0, 3, 0.1).onChange(function (e) {
ambientLight.color = new THREE.Color(controls.ambientColor);
ambientLight.intensity = controls.intensity;
});
gui.addColor(controls, 'ambientColor').onChange(function (e) {
ambientLight.color = new THREE.Color(controls.ambientColor);
ambientLight.intensity = controls.intensity;
});
gui.add(controls, 'disableSpotlight').onChange(function (e) {
spotLight.visible = !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：
-
打开聚光灯效果：
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关闭聚光灯效果：
