买一个域名多少钱一个,网站加上视频对seo影响,建站教程流程图,搜索引擎外部优化有哪些渠道参考资料
第一个3D案例—透视投影相机第一个3D案例—渲染器…Canvas画布布局和全屏
知识点
透视投影相机PerspectiveCameraWebGL渲染器WebGLRenderer辅助观察坐标系AxesHelper漫反射网格材质MeshLambertMaterial点光源PointLight点光源辅助观察PointLightHelper环境光Ambien…参考资料
第一个3D案例—透视投影相机第一个3D案例—渲染器…Canvas画布布局和全屏
知识点
透视投影相机PerspectiveCameraWebGL渲染器WebGLRenderer辅助观察坐标系AxesHelper漫反射网格材质MeshLambertMaterial点光源PointLight点光源辅助观察PointLightHelper环境光AmbientLight平行光DirectionalLight平行光辅助观察DirectionalLightHelper相机控件OrbitControls请求动画帧window.requestAnimationFramecanvas画布宽高度动态变化性能监控Stats
代码实现 相机、渲染器、光 !DOCTYPE html
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headmeta charsetUTF-8titleThree.js/title
/headbody/body!-- 具体路径配置你根据自己文件目录设置我的是课件中源码形式 --script typeimportmap{imports: {three: ./js/three.module.js,three/addons/: ../three.js/examples/jsm/}}/scriptscript typemoduleimport * as THREE from three;import { OrbitControls } from three/addons/controls/OrbitControls.js;const width 800const height 500// 场景const scene new THREE.Scene();// 几何体const geometry new THREE.BoxGeometry(100, 100, 100);// 材质 // MeshBasicMaterial不受光// MeshLambertMaterial受光const material new THREE.MeshLambertMaterial({color:0x0000ff,});// 网格模型物体const mesh new THREE.Mesh(geometry, material);mesh.position.set(0, 0, 0);scene.add(mesh);// 坐标系const axes new THREE.AxesHelper(200);scene.add(axes);// // 点光源// const pointLight new THREE.PointLight( 0xffffff, 1.0, 0, 0);// pointLight.position.set(-200, 200, 200 );// scene.add( pointLight );// // 辅助点光源// const pointLightHelper new THREE.PointLightHelper( pointLight, 10 );// scene.add( pointLightHelper );// 环境光const ambientLight new THREE.AmbientLight( 0xffffff, 0.2);scene.add( ambientLight );// 平行光const directionalLight new THREE.DirectionalLight( 0xffffff, 1, 0, 0);// directionalLight.position.set(100, 0, 0);// directionalLight.position.set(0, 100, 0);// directionalLight.position.set(100, 100, 100);directionalLight.position.set(100, 60, 50);directionalLight.target mesh;scene.add( directionalLight );// 辅助平行光const directionalLightHelper new THREE.DirectionalLightHelper( directionalLight, 10 );scene.add( directionalLightHelper );// 相机const camera new THREE.PerspectiveCamera(75, width/height, 0.1, 1000);camera.position.set(200, 200, 200);camera.lookAt(scene.position);// 渲染器const renderer new THREE.WebGLRenderer();renderer.setSize(width, height);renderer.render(scene, camera);document.body.appendChild(renderer.domElement);// 控制器const controls new OrbitControls(camera, renderer.domElement);controls.addEventListener(change, () {renderer.render(scene, camera);});/script
/html动画 !DOCTYPE html
html langen
headmeta charsetUTF-8titleThree.js/title
/headbody/body!-- 具体路径配置你根据自己文件目录设置我的是课件中源码形式 --script typeimportmap{imports: {three: ./js/three.module.js,three/addons/: ../three.js/examples/jsm/}}/scriptscript typemoduleimport * as THREE from three;import { OrbitControls } from three/addons/controls/OrbitControls.js;const width 800const height 500// 场景const scene new THREE.Scene();// 几何体const geometry new THREE.BoxGeometry(100, 100, 100);// 材质const material new THREE.MeshBasicMaterial({color: 0x00ff00,transparent: true,opacity: 0.5});// 网格模型物体const mesh new THREE.Mesh(geometry, material);mesh.position.set(0, 0, 0);scene.add(mesh);// 坐标系const axes new THREE.AxesHelper(200);scene.add(axes);// 相机const camera new THREE.PerspectiveCamera(75, width/height, 0.1, 1000);camera.position.set(200, 200, 200);camera.lookAt(scene.position);// 渲染器const renderer new THREE.WebGLRenderer();renderer.setSize(width, height);renderer.render(scene, camera);document.body.appendChild(renderer.domElement);// 动画渲染// 跟踪时间var clock new THREE.Clock();function render() {const spt clock.getDelta() * 1000;console.log( ~ file: animation.html:59 ~ render ~ spt:, spt)requestAnimationFrame(render);mesh.rotation.y 0.01;renderer.render(scene, camera);}render();// 控制器const controls new OrbitControls(camera, renderer.domElement);controls.addEventListener(change, () {// 因为动画渲染了所以这里可以省略// renderer.render(scene, camera);});/script
/html画布动态变化 !DOCTYPE html
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headmeta charsetUTF-8titleThree.js/titlestylebody {margin: 0;overflow: hidden;}/style
/headbody/body!-- 具体路径配置你根据自己文件目录设置我的是课件中源码形式 --script typeimportmap{imports: {three: ./js/three.module.js}}/scriptscript typemoduleimport * as THREE from three;let width window.innerWidth;let height window.innerHeight;// 场景const scene new THREE.Scene();// 几何体const geometry new THREE.BoxGeometry(100, 100, 100);// 材质const material new THREE.MeshBasicMaterial({color: 0x00ff00,transparent: true,opacity: 0.5});// 网格模型物体const mesh new THREE.Mesh(geometry, material);mesh.position.set(0, 0, 0);scene.add(mesh);// 坐标系const axes new THREE.AxesHelper(200);scene.add(axes);// 相机const camera new THREE.PerspectiveCamera(75, width/height, 0.1, 1000);camera.position.set(200, 200, 200);camera.lookAt(scene.position);// 渲染器const renderer new THREE.WebGLRenderer();renderer.setSize(width, height);renderer.render(scene, camera);document.body.appendChild(renderer.domElement);// 填满浏览器window.onresize function () {width window.innerWidth;height window.innerHeight;renderer.setSize(width, height);camera.aspect width / height;camera.updateProjectionMatrix();}/script
/html性能监控 !DOCTYPE html
html langen
headmeta charsetUTF-8titleThree.js/title
/headbody/body!-- 具体路径配置你根据自己文件目录设置我的是课件中源码形式 --script typeimportmap{imports: {three: ./js/three.module.js,three/addons/: ../three.js/examples/jsm/}}/scriptscript typemoduleimport * as THREE from three;import { OrbitControls } from three/addons/controls/OrbitControls.js;import Stats from three/addons/libs/stats.module.js;const width 800const height 500// 场景const scene new THREE.Scene();// 几何体const geometry new THREE.BoxGeometry(100, 100, 100);// 材质const material new THREE.MeshBasicMaterial({color: 0x00ff00,transparent: true,opacity: 0.5});// 网格模型物体const mesh new THREE.Mesh(geometry, material);mesh.position.set(0, 0, 0);scene.add(mesh);for (let i 0; i 1000; i) {// 几何体const geometry new THREE.BoxGeometry(5, 5, 5);// 材质const material new THREE.MeshBasicMaterial({color: 0x00ff00,transparent: true,opacity: 0.5});// 网格模型物体const mesh new THREE.Mesh(geometry, material);mesh.position.set((Math.random() - 0.5) * 200, (Math.random() - 0.5) * 200, (Math.random() - 0.5) * 200);scene.add(mesh);}// 坐标系const axes new THREE.AxesHelper(200);scene.add(axes);// 相机const camera new THREE.PerspectiveCamera(75, width/height, 0.1, 1000);camera.position.set(200, 200, 200);camera.lookAt(scene.position);// 渲染器const renderer new THREE.WebGLRenderer();renderer.setSize(width, height);renderer.render(scene, camera);document.body.appendChild(renderer.domElement);// 性能监控const stats new Stats()document.body.appendChild(stats.domElement);// 动画渲染// 跟踪时间var clock new THREE.Clock();function render() {stats.update()const spt clock.getDelta() * 1000;requestAnimationFrame(render);mesh.rotation.y 0.01;renderer.render(scene, camera);}render();/script
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