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threejs-project
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case-029.html

<!DOCTYPE html>
<html>
	<head>
		<title>Threejs实现开门动画</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/GLTFLoader.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 mesh;
			var mixer;

			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();
				var textureLoader = new THREE.TextureLoader();

				// 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, 1000);
				// 将摄像机对准场景的中心
				camera.position.z = 100;
				camera.position.y = 10;
				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);

				// 启动动画
				renderScene();
				gaogemen();

				function gaogemen() {
					// 创建平面
					const planeGeometry = new THREE.PlaneGeometry(300, 300); // 生成平面几何
					const planeMaterial = new THREE.MeshLambertMaterial({
						// 生成材质
						color: 0xcccccc,
					});
					const planeMesh = new THREE.Mesh(planeGeometry, planeMaterial); // 生成平面网格
					planeMesh.rotation.x = -Math.PI / 2; //绕X轴旋转90度
					// scene.add(planeMesh); // 添加到场景中

					// 创建平行光源
					const light = new THREE.DirectionalLight(0xffffff, 1); // 平行光，颜色为白色，强度为1
					light.position.set(-40, 40, 20); // 设置灯源位置
					scene.add(light); // 添加到场景中

					// 创建门框
					const doorFrameSide = new THREE.BoxBufferGeometry(1, 20, 2); // 侧边门框
					const doorFrameTop = new THREE.BoxBufferGeometry(12, 1, 2); // 上门框
					const doorFrameMaterial = new THREE.MeshLambertMaterial({
						color: 0xad4800,
					});
					const doorFrameLeftMesh = new THREE.Mesh(
						doorFrameSide,
						doorFrameMaterial
					);
					const doorFrameTopMesh = new THREE.Mesh(doorFrameTop, doorFrameMaterial);
					const doorFrameRightMesh = doorFrameLeftMesh.clone();
					doorFrameLeftMesh.position.set(-5.5, 10, 0);
					doorFrameRightMesh.position.set(5.5, 10, 0);
					doorFrameTopMesh.position.set(0, 20.5, 0);
					scene.add(doorFrameLeftMesh);
					scene.add(doorFrameRightMesh);
					scene.add(doorFrameTopMesh);

					// 创建门
					const door = new THREE.BoxBufferGeometry(10, 20, 0.5);
					const doorMaterial = new THREE.MeshLambertMaterial({
						color: 0xd88c00
					});
					const doorMesh = new THREE.Mesh(door, doorMaterial);

					// 实现门围绕特定轴旋转
					const group = new THREE.Group();
					group.position.set(5, 10, 0); // 设置外层对象的中心为原本想要旋转的位置
					group.add(doorMesh);
					group.name = 'door';
					doorMesh.position.set(-5, 0, 0);
					scene.add(group);

					const times = [0, 3]; // 关键帧时间数组
					const rotationValues = [0, -Math.PI / 2];
					const rotationTrack = new THREE.KeyframeTrack(
						'door.rotation[y]',
						times,
						rotationValues
					); // 关键帧轨道
					const duration = 3; // 持续时间 (单位秒)
					const clip = new THREE.AnimationClip('open', duration, [rotationTrack]); // 动画剪辑

					// 播放编辑好的关键帧数据
					mixer = new THREE.AnimationMixer(group); // 动画混合器
					const AnimationAction = mixer.clipAction(clip); // 返回所传入的剪辑参数的AnimationAction
					AnimationAction.timeScale = 1; // 可以调节播放速度，默认是1。为0时动画暂停。值为负数时动画会反向执行。
					AnimationAction.play(); // 开始播放
				}

				var clock = new THREE.Clock(); //声明一个时钟对象
				function renderScene() {
					orbit.update();
					// 使用requestAnimationFrame函数进行渲染
					requestAnimationFrame(renderScene);
					renderer.render(scene, camera);
					// 更新帧动画的时间
					if (mixer) {
						mixer.update(clock.getDelta());
					}
				}

				// 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>