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threejs-project
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case-038.html

<!DOCTYPE html>
<html>
	<head>
		<title>Threejs实现球形等距圆柱投影，全景分离图片贴图</title>
		<meta charset="UTF-8">
		<script type="text/javascript" src="libs/statistics.js"></script>
		<script type="text/javascript" src="libs/steak.js"></script>
		<script type="text/javascript" src="libs/three.js"></script>
		<script type="text/javascript" src="libs/OrbitControls.js"></script>
		<script type="text/javascript" src="libs/ColladaLoader.js"></script>
		<script type="text/javascript" src="libs/dat.gui.js"></script>
		<script type="text/javascript" charset="UTF-8" src="libs/Tween.min.js"></script>
		<style>
			body {
				margin: 0;
				overflow: hidden;
			}
		</style>
	</head>
	<body>
		<div id="dom"></div>
		<script type="text/javascript">
			var camera;
			var renderer;
			var clock = new THREE.Clock(); //声明一个时钟对象

			function init() {
				// 创建一个场景，它将包含我们所有的元素，如物体，相机和灯光。
				var scene = new THREE.Scene();
				scene.opacity = 0;

				// 创建一个摄像机，它定义了我们正在看的地方
				camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 100000);
				// 将摄像机对准场景的中心
				camera.position.z = 500;
				camera.lookAt(scene.position);
				var orbit = new THREE.OrbitControls(camera);

				// 创建一个渲染器并设置大小，WebGLRenderer将会使用电脑显卡来渲染场景
				renderer = new THREE.WebGLRenderer({
					antialias: true,
					logarithmicDepthBuffer: true,
				});
				// renderer.setClearColor(new THREE.Color("#0e0934"));
				renderer.setSize(window.innerWidth, window.innerHeight);

				var ambientLight = new THREE.AmbientLight("#ffffff", 1);
				scene.add(ambientLight);

				// 将呈现器的输出添加到HTML元素
				document.getElementById("dom").appendChild(renderer.domElement);

				var textureLoader = new THREE.TextureLoader();
				var alternativeMap = textureLoader.load("assets/bgImage/senlin.jpg")
				alternativeMap.mapping = THREE.EquirectangularReflectionMapping;
				alternativeMap.magFilter = THREE.LinearFilter;
				alternativeMap.minFilter = THREE.LinearMipMapLinearFilter;

				var equirectShader = THREE.ShaderLib["equirect"];
				var equireclMaterial = new THREE.ShaderMaterial({
					fragmentShader: equirectShader.fragmentShader,
					vertexShader: equirectShader.vertexShader,
					uniforms: equirectShader.uniforms,
					depthWrite: false,
					side: THREE.BackSide
				});
				equireclMaterial.uniforms["tEquirect"].value = alternativeMap;
				var skybox = new THREE.Mesh(new THREE.BoxGeometry(1000, 1000, 1000), equireclMaterial);
				scene.add(skybox);

				var cubeLoader = new THREE.CubeTextureLoader();
				var urls = [
					'assets/bgImage/skyBox6/posx.jpg',
					'assets/bgImage/skyBox6/negx.jpg',
					'assets/bgImage/skyBox6/posy.jpg',
					'assets/bgImage/skyBox6/negy.jpg',
					'assets/bgImage/skyBox6/posz.jpg',
					'assets/bgImage/skyBox6/negz.jpg'
				]
				var cubeMap = cubeLoader.load(urls)
				var sphereMaterial = new THREE.MeshStandardMaterial({
					envMap: cubeMap,
					metalness: 1,
					roughness: 0,
					side: THREE.BackSide
				})

				var skybox1 = new THREE.Mesh(new THREE.BoxGeometry(1000, 1000, 1000), sphereMaterial);
				// scene.add(skybox1);

				const texture = new THREE.CubeTextureLoader()
					.setPath('assets/bgImage/skyBox6/')
					.load([
						'posx.jpg', //右(-1,0,0)
						'negx.jpg', //左(1,0,0)
						'posy.jpg', //上(0,1,0)
						'negy.jpg', //下(0,-1,0)
						'posz.jpg', //前(0,0,1)
						'negz.jpg' //后(0,0,-1)
					]);
				texture.format = THREE.RGBFormat;
				texture.mapping = THREE.CubeReflectionMapping;

				const shader = THREE.ShaderLib["cube"];
				shader.uniforms["tCube"].value = texture; //老版本
				const material = new THREE.ShaderMaterial({
					fragmentShader: shader.fragmentShader,
					vertexShader: shader.vertexShader,
					uniforms: shader.uniforms,
					depthWrite: false,
					side: THREE.DoubleSide
				});
				material.envMap = texture; //新版本
				let skyBox2 = new THREE.Mesh(new THREE.BoxGeometry(5000, 5000, 5000), material);
				// scene.add(skyBox2);

				// 启动动画
				renderScene();

				// 拾取对象
				function pickupObjects(event) {
					// 点击屏幕创建一个向量
					var raycaster = new THREE.Raycaster();
					var vector = new THREE.Vector2((event.clientX / window.innerWidth) * 2 - 1, -(event.clientY / window
						.innerHeight) * 2 + 1);
					var fxl = new THREE.Vector3(0, 1, 0);
					var groundplane = new THREE.Plane(fxl, 0);
					raycaster.setFromCamera(vector, camera);
					var ray = raycaster.ray;
					let intersects = ray.intersectPlane(groundplane);
					// console.log(intersects)

				}
				document.addEventListener('click', pickupObjects, false); //监听单击拾取对象初始化球体

				function renderScene() {
					orbit.update(clock.getDelta());
					// 使用requestAnimationFrame函数进行渲染
					requestAnimationFrame(renderScene);
					renderer.render(scene, camera);
				}

				// 渲染的场景
				renderer.render(scene, camera);
			}
			window.onload = init;

			// 随着窗体的变化修改场景
			function onResize() {
				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();
				renderer.setSize(window.innerWidth, window.innerHeight);
			}
			// 监听窗体调整大小事件
			window.addEventListener('resize', onResize, false);
		</script>
	</body>
</html>