threeJS-Helper14-SpotLightHelperAndCameraHelper(聚光灯显示和相机显示助手)
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涉及的知识点博主已经从three源码库里面摘要出来放在对应的注释里面
今天学习Helper里面的SpotLightHelper助手!
涉及知识点：平行光、平面、GLTF模型加载、动画、阴影、环境放射、OrbitControls控制对象等，不懂可以先忽略，后期会讲！
效果图：
代码：
<html>
<head>
<title>threeJS-Helper14-SpotLightHelperAndCameraHelper(聚光灯显示和相机显示助手)</title>
<style>
body {
background-color: #000;
margin: 0px;
overflow: hidden;
}
canvas {
width: 100%;
height: 100%
}
</style>
</head>
<body>
<script src="../../../build/three.js"></script>
<script src="../../js/loaders/GLTFLoader.js"></script>
<script src="../../js/controls/OrbitControls.js"></script>
<script>
var camera, scene, renderer, geometry, material, animate, controls; //常用变量
var cube, spotLight, helper,mshStdBox; //自定义对象变量
var target = new THREE.Vector3(0, 0, 0);
var model, skeleton, mixer, clock;
var crossFadeControls = [];
var idleAction, walkAction, runAction;
var idleWeight, walkWeight, runWeight;
var actions, settings;
var singleStepMode = false;
var sizeOfNextStep = 0;
init();
animate();
function init() {
scene = new THREE.Scene();
scene.background = new THREE.Color(0xcfcfcf);
clock = new THREE.Clock();
camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
camera.position.set(0, 100, 150);
camera.lookAt(target);
camera.updateProjectionMatrix(); //相机更新
var ambient = new THREE.AmbientLight(0xffffff, 0.1);
scene.add(ambient);
//聚光灯
// SpotLight( color：颜色, intensity：强度, distance：发光距离, angle：角度, penumbra：边缘范围, decay：衰减 )
spotLight = new THREE.SpotLight(0xffffff, 1);
spotLight.position.set(15, 110, 50);
spotLight.angle = Math.PI / 4;
spotLight.penumbra = 0.05;//边缘范围，反比
spotLight.decay = 2;//衰减系数，反比
spotLight.distance = 400;//发光距离
spotLight.castShadow = true;//阴影
spotLight.shadow.mapSize.width = 1024;
spotLight.shadow.mapSize.height = 1024;
spotLight.shadow.camera.near = 10;//近截面
spotLight.shadow.camera.far = 250;
scene.add(spotLight);
// 聚光灯显示助手SpotLightHelper( light:灯光, color：颜色 )
lightHelper = new THREE.SpotLightHelper(spotLight,0xdfdfdf);
scene.add(lightHelper);
// 相机显示助手CameraHelper( camera：相机 )
shadowCameraHelper = new THREE.CameraHelper(spotLight.shadow.camera);
scene.add(shadowCameraHelper);
var mesh = new THREE.Mesh(new THREE.PlaneBufferGeometry(200, 200), new THREE.MeshPhongMaterial({
color: 0x9cfcf99,
depthWrite: false
}));
mesh.rotation.x = -Math.PI / 2;
mesh.position.set(0, -20, 0)
mesh.receiveShadow = true;
scene.add(mesh);
// PolarGridHelper( radius：标网格的半径, radials：径向线的数量, circles：圆圈数,
// divisions：每个圆圈使用的线段数, color1：用于网格元素的第一种颜色, color2：用于网格元素的第一种颜色 )
var radius = 100;
var radials = 16;
var circles = 8;
var divisions = 64;
var PolarGridHelper = new THREE.PolarGridHelper(radius, radials, circles, divisions);
PolarGridHelper.position.set(0, -20, 0)
scene.add(PolarGridHelper)
renderer = new THREE.WebGLRenderer({
antialias: true
});
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.shadowMap.enabled = true;
renderer.shadowMap.type = THREE.PCFSoftShadowMap;
renderer.gammaInput = true;
renderer.gammaOutput = true;
document.body.appendChild(renderer.domElement);
//OrbitControls控件操作模块
controls = new THREE.OrbitControls(camera, renderer.domElement);
controls.autoRotate = true;
controls.autoRotateSpeed = 0.5;
controls.addEventListener('change', function () {
renderer.render(scene, camera);
});
// BoxGeometry( width, height, depth, widthSegments, heightSegments, depthSegments )
geometry = new THREE.BoxGeometry(80, 5, 80, 3, 3, 3);
// 左边立方体
var matStdObjects = new THREE.MeshStandardMaterial({
color: 0xA0cf00,
roughness: 0,
metalness: 0.6
});
mshStdBox = new THREE.Mesh(geometry, matStdObjects);
mshStdBox.position.set(0, -5, 0);
mshStdBox.rotation.set(0, Math.PI / 2.0, 0);
mshStdBox.castShadow = true;
mshStdBox.receiveShadow = true;
scene.add(mshStdBox);
loadModel(); //添加人物模型
}
function loadModel() {
var loader = new THREE.GLTFLoader();
loader.load('../../models/gltf/Soldier.glb', function (gltf) {
model = gltf.scene;
scene.add(model);
model.traverse(function (object) {
if (object.isMesh) {
object.castShadow = true;
console.log(object);
}
});
model.rotation.y = -Math.PI;
model.scale.set(50, 50, 50);
// 骨骼显示助手
skeleton = new THREE.SkeletonHelper(model);
scene.add(skeleton);
var animations = gltf.animations;
mixer = new THREE.AnimationMixer(model);
idleAction = mixer.clipAction(animations[0]);
walkAction = mixer.clipAction(animations[3]);
runAction = mixer.clipAction(animations[1]);
actions = [idleAction, walkAction, runAction];
actions[1].play();
animate();
});
}
function activateAllActions() {
actions.forEach(function (action) {
action.play();
});
}
function animate() {
requestAnimationFrame(animate);
var mixerUpdateDelta = clock.getDelta();
if (mixer) mixer.update(mixerUpdateDelta);
if (controls) controls.update();
mshStdBox.rotation.y += 0.01;
renderer.render(scene, camera);
};
</script>
</body>
</html>