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龙岗义乌网站制作,工贸企业logo设计,离石古楼角网站建设,wordpress主题HaoWa#x1f468;⚕️ 主页#xff1a; gis分享者 #x1f468;⚕️ 感谢各位大佬 点赞#x1f44d; 收藏⭐ 留言#x1f4dd; 加关注✅! #x1f468;⚕️ 收录于专栏#xff1a;threejs gis工程师 文章目录 一、#x1f340;前言1.1 ☘️THREE.ExtrudeGeometry拉伸…⚕️ 主页 gis分享者 ⚕️ 感谢各位大佬 点赞 收藏⭐ 留言 加关注✅! ⚕️ 收录于专栏threejs gis工程师 文章目录 一、前言1.1 ☘️THREE.ExtrudeGeometry拉伸几何体概念 二、利用THREE.ExtrudeGeometry拉伸几何体实现svg的拉伸1. ☘️实现思路2. ☘️代码样例 一、前言 本文详细介绍如何基于threejs在三维场景中利用THREE.ExtrudeGeometry拉伸几何体实现svg的拉伸亲测可用。希望能帮助到您。一起学习加油加油 1.1 ☘️THREE.ExtrudeGeometry拉伸几何体概念 THREE.ExtrudeGeometry 是 Three.js 中用于创建挤出几何体的一个类。挤出几何体是从一个二维路径轮廓通过沿着某个方向通常是 Z 轴“挤出”一定的距离来生成三维几何体。这种方法非常适合创建各种三维模型如字母、符号、标志等。 创建方法 构造函数 new THREE.ExtrudeGeometry(shape, extrudeSettings) 接受两个参数来定义挤出几何体的形状和挤出设置。 参数说明 shape一个 THREE.Shape 对象定义了要挤出的二维轮廓。 extrudeSettings一个包含挤出参数的对象可选参数包括 amount挤出的距离默认为 100。 bevelEnabled是否启用倒角默认为 true。 bevelThickness倒角厚度默认为 10。 bevelSize倒角大小默认为 8。 bevelSegments倒角分割数量默认为 1。 steps挤出路径分割的数量默认为 1。 curveSegments曲线分割数量默认为 12。 uvGeneratorUV 坐标生成器默认为 THREE.ExtrudeGeometryUVGenerator。 二、利用THREE.ExtrudeGeometry拉伸几何体实现svg的拉伸

1. ☘️实现思路 1、初始化renderer渲染器2、初始化Scene三维场景3、初始化camera相机定义相机位置 camera.position.set4、初始化THREE.AmbientLight环境光源scene场景加入环境光源初始化THREE.DirectionalLight平行光源设置平行光源位置scene添加平行光源。5、加载几何模型根据svg数据生成THREE.ShapeGeometry几何体使用THREE.MeshPhongMaterial反射材质生成mesh物体scene场景加入mesh。6、加入controls、gui控制gui控制中加入asGeom函数用于生成基于svg数据的THREE.ExtrudeGeometry拉伸几何体加入stats监控器监控帧数信息。
2. ☘️代码样例 !DOCTYPE html html langen headmeta charsetUTF-8titlelearn26(svg拉高)/titlescript srclib/threejs/127/three.js-master/build/three.js/scriptscript srchttps://johnson2heng.github.io/three.js-demo/lib/js/libs/d3-threeD.js/scriptscript srclib/threejs/127/three.js-master/examples/js/utils/SceneUtils.js/scriptscript srclib/threejs/127/three.js-master/examples/js/controls/OrbitControls.js/scriptscript srclib/threejs/127/three.js-master/examples/js/libs/stats.min.js/scriptscript srclib/threejs/127/three.js-master/examples/js/libs/dat.gui.min.js/script /head stylehtml, body {margin: 0;height: 100%;}canvas {display: block;} /style body onloaddraw() div idbatman styledisplay:none;!–svg version1.0 xmlnshttp://www.w3.org/2000/svg xmlns:xlinkhttp://www.w3.org/1999/xlink x0px y0px width1152px height1152px xml:spacepreservegpath idbatman-path stylefill:rgb(0,0,0); dM 261.135 114.535 C 254.906 116.662 247.491 118.825 244.659 119.344 C 229.433 122.131 177.907 142.565 151.973 156.101 C 111.417 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370.73 130.902 368.94 147.744 367.172 162.315 C 365.405 176.887 363.523 195.424 362.99 203.509 C 360.283 244.622 352.784 266.044 335.323 282.544 C 326.456 290.923 312.488 297.497 303.508 297.518 C 294.864 297.539 278.732 290.063 269.473 281.748 C 246.952 261.521 238.846 229.614 245.481 187.314 C 247.894 171.928 266.562 131.612 275.927 121.56 C 277.987 119.348 279.673 116.786 279.673 115.867 C 279.673 114.947 279.905 113.593 280.188 112.856 C 281.28 110.017 271.977 110.837 261.136 114.536 L 261.135 114.535 //g/svg–svg t1626938111428 classicon viewBox0 0 1024 1024 version1.1 xmlnshttp://www.w3.org/2000/svg p-id3505 width22 height22path idbatman-path dM959.4 234.6v80.6c0 39.3-32 71.2-71.2 71.2-12.4 0-24-3.2-34.2-8.8l-2 461.7c0 53.4-43.6 97-97.2 97H634.6c-18.3 0-35.6-7.1-48.6-20.1-9.3-9.3-15.6-20.8-18.4-33.3-12.5-2.8-24-9.1-33.3-18.4-13-13-20.1-30.2-20.1-48.6 0-18.3 7.2-35 19-47.4-12.4-4.3-24.8-9.2-37.1-14.6v107.7c0 41.2-33.5 74.7-74.7 74.7-33.2 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window.innerWidth / window.innerHeight, 1, 10000)camera.position.set(0, 0, 1500)}var lightvar initLight () {scene.add(new THREE.AmbientLight(0x404040))light new THREE.DirectionalLight(0xffffff)light.position.set(1, 1, 1)scene.add(light)}var drawShape () {var svgString document.querySelector(#batman-path).getAttribute(d)var shape transformSVGPathExposed(svgString)return shape}var createMesh (geom) {// 设置当前的模型矩阵沿xy轴偏移让图片处于显示中心// geom.applyMatrix(new THREE.Matrix4().makeTranslation(-450, -300, 0))// 更新当前几何体的相关盒子模型数据如果设置居中会居中方法内部调用。// geom.computeBoundingBox()//让图形居中显示geom.center()var meshMaterial new THREE.MeshNormalMaterial({flatShading: THREE.FlatShading,transparent: true,opacity: 0.7})var wireFrameMatl new THREE.MeshBasicMaterial()wireFrameMatl.wireframe truevar mesh THREE.SceneUtils.createMultiMaterialObject(geom, [meshMaterial, wireFrameMatl])mesh.rotation.z Math.PIreturn mesh}var initModel () {var helper new THREE.AxisHelper(20)scene.add(helper)var shape new THREE.ShapeGeometry(drawShape())var material new THREE.MeshPhongMaterial({color:0xff00ff})material.side THREE.DoubleSidevar mesh new THREE.Mesh(shape, material)scene.add(mesh)}var statsvar initStats () {stats new Stats()document.body.appendChild(stats.dom)}var controlsvar initControls () {controls new THREE.OrbitControls(camera, renderer.domElement)controls.enableDamping true}var gui,shapefunction initGui() {//声明一个保存需求修改的相关数据的对象gui {amount:2,bevelThickness:2,bevelSize:0.5,bevelEnabled:true,bevelSegments:3,curveSegments:12,steps:1,asGeom:function () {var helper new THREE.AxisHelper(2000)scene.add(helper)// 删除旧的模型scene.remove(shape)// 创建一个新的var options {amount: gui.amount,bevelThickness: gui.bevelThickness,bevelSize: gui.bevelSize,bevelSegments: gui.bevelSegments,bevelEnabled: gui.bevelEnabled,curveSegments: gui.curveSegments,steps: gui.steps}shape createMesh(new THREE.ExtrudeGeometry(drawShape(), options))// 将模型添加到场景当中scene.add(shape)}};var datGui new dat.GUI()//将设置属性添加到gui当中gui.add(对象属性最小值最大值datGui.add(gui, amount, 0, 200).onChange(gui.asGeom)datGui.add(gui, bevelThickness, 0, 10).onChange(gui.asGeom)datGui.add(gui, bevelSize, 0, 10).onChange(gui.asGeom)datGui.add(gui, bevelSegments, 0, 30).step(1).onChange(gui.asGeom)datGui.add(gui, bevelEnabled).onChange(gui.asGeom)datGui.add(gui, curveSegments, 1, 30).step(1).onChange(gui.asGeom)datGui.add(gui, steps, 1, 5).step(1).onChange(gui.asGeom)//调用生成一次图形gui.asGeom()}var render () {renderer.render(scene, camera)}var onWindowResize () {camera.aspect window.innerWidth / window.innerHeightcamera.updateProjectionMatrix()render()renderer.setSize(window.innerWidth, window.innerHeight)}var animate () {render()stats.update()controls.update()requestAnimationFrame(animate)}var draw () {initRender()initScene()initCamera()initLight()// initModel()initStats()initControls()initGui()animate()window.onresize onWindowResize} /script /html效果如下