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刚学了一个炫酷3D三棱锥立体特效，快来看看

发布时间：2024/3/12 编程问答 68 豆豆
生活随笔 收集整理的这篇文章主要介绍了 刚学了一个炫酷3D三棱锥立体特效，快来看看 小编觉得挺不错的,现在分享给大家,帮大家做个参考.

目录标题

  • 演示
  • 技术栈
  • 源码
      • css部分
      • js部分
  • 点击直接资料领取

演示

技术栈

3D特效的话最容易让人想到的应该是three.js吧。我们今天来说说它。

Three.js是基于原生WebGL封装运行的三维引擎，在所有WebGL引擎中，Three.js是国内文资料最多、使用最广泛的三维引擎。

Threejs是一款WebGL三维引擎，它可以用来做什么许多许多地场景应用

一个小案例

<!DOCTYPE html> <html lang="en"><head><meta charset="UTF-8"><title>第一个three.js文件_WebGL三维场景</title><style>body {margin: 0;overflow: hidden;/* 隐藏body窗口区域滚动条 */}</style><!--引入three.js三维引擎--><!-- <script src="http://www.yanhuangxueyuan.com/versions/threejsR92/build/three.js"></script>--><script src="js/three/build/three.js"></script><!-- <script src="http://www.yanhuangxueyuan.com/threejs/build/three.js"></script> --> </head><body><script>/*** 创建场景对象Scene*/var scene = new THREE.Scene();/*** 创建网格模型*/// var geometry = new THREE.SphereGeometry(60, 40, 40); //创建一个球体几何对象var geometry = new THREE.BoxGeometry(100, 100, 100); //创建一个立方体几何对象Geometryvar material = new THREE.MeshLambertMaterial({color: 0x0000ff}); //材质对象Materialvar mesh = new THREE.Mesh(geometry, material); //网格模型对象Meshscene.add(mesh); //网格模型添加到场景中/*** 光源设置*///点光源var point = new THREE.PointLight(0xffffff);point.position.set(400, 200, 300); //点光源位置scene.add(point); //点光源添加到场景中//环境光var ambient = new THREE.AmbientLight(0x444444);scene.add(ambient);// console.log(scene)// console.log(scene.children)/*** 相机设置*/var width = window.innerWidth; //窗口宽度var height = window.innerHeight; //窗口高度var k = width / height; //窗口宽高比var s = 200; //三维场景显示范围控制系数，系数越大，显示的范围越大//创建相机对象var camera = new THREE.OrthographicCamera(-s * k, s * k, s, -s, 1, 1000);camera.position.set(200, 300, 200); //设置相机位置camera.lookAt(scene.position); //设置相机方向(指向的场景对象)/*** 创建渲染器对象*/var renderer = new THREE.WebGLRenderer();renderer.setSize(width, height);//设置渲染区域尺寸renderer.setClearColor(0xb9d3ff, 1); //设置背景颜色document.body.appendChild(renderer.domElement); //body元素中插入canvas对象//执行渲染操作 指定场景、相机作为参数renderer.render(scene, camera);</script> </body> </html>

源码

css部分

body{overflow: hidden;margin:0; } canvas{position: absolute;top: 0;left: 0;width: 100%;height:100%; }

js部分

var w = window.innerWidth, h = window.innerHeight; window.onresize = function(){var w = window.innerWidth, h = window.innerHeight;camera.aspect = w / h;camera.updateProjectionMatrix();renderer.setSize( w, h ); }cameraSpeed = .0003; lightSpeed = .001; tubularSegments = 1000; radialSegments = 3; tubeRadius = 2; lightColor = 0xffffff; lightIntensity = 1; lightDistance = 20;var renderer = new THREE.WebGLRenderer({canvas: document.querySelector("canvas"),antialias: true, }); renderer.setSize(w, h);var scene = new THREE.Scene(); var camera = new THREE.PerspectiveCamera(60, w / h, .001, 1000);var starsGeometry = new THREE.Geometry(); for(i=0; i<3000; i++){var star = new THREE.Vector3();star.x = THREE.Math.randFloatSpread(1500);star.y = THREE.Math.randFloatSpread(1500);star.z = THREE.Math.randFloatSpread(1500);starsGeometry.vertices.push(star); } var starsMaterial = new THREE.PointsMaterial({color: 0xffffff}); var starField = new THREE.Points(starsGeometry,starsMaterial); scene.add(starField);for (i=0; i<p.length; i++) {var x = p[i][0];var y = p[i][2];var z = p[i][1];p[i] = new THREE.Vector3(x,y,z); } var path = new THREE.CatmullRomCurve3(p); var geometry = new THREE.TubeGeometry(path,tubularSegments,tubeRadius,radialSegments,true);for(i=0; i<geometry.faces.length; i++){geometry.faces[i].color = new THREE.Color("hsl("+i/2+",100%,50%)"); }var material = new THREE.MeshLambertMaterial({side: THREE.BackSide,vertexColors: THREE.FaceColors,wireframe: true });var tube = new THREE.Mesh(geometry, material); scene.add(tube);var light = new THREE.PointLight(0xffffff, 1, 50); scene.add(light); var light2 = new THREE.AmbientLight(0x222222); scene.add(light2);var l1 = new THREE.PointLight(lightColor, lightIntensity, lightDistance); scene.add(l1); var l2 = new THREE.PointLight(lightColor, lightIntensity, lightDistance); scene.add(l2); var l3 = new THREE.PointLight(lightColor, lightIntensity, lightDistance); scene.add(l3); var l4 = new THREE.PointLight(lightColor, lightIntensity, lightDistance); scene.add(l4); var l5 = new THREE.PointLight(lightColor, lightIntensity, lightDistance); scene.add(l5);var pct = 0; var pct2 = 0; function render(){pct += cameraSpeedpct2 += lightSpeed;var pt1 = path.getPointAt(pct%1);var pt2 = path.getPointAt((pct + .01)%1);camera.position.set(pt1.x,pt1.y,pt1.z);camera.lookAt(pt2);light.position.set(pt2.x, pt2.y, pt2.z);l1.position.set(path.getPointAt((pct2+.0)%1).x, path.getPointAt((pct2+.0)%1).y, path.getPointAt((pct2+.0)%1).z);l2.position.set(path.getPointAt((pct2+.2)%1).x, path.getPointAt((pct2+.2)%1).y, path.getPointAt((pct2+.2)%1).z);l3.position.set(path.getPointAt((pct2+.4)%1).x, path.getPointAt((pct2+.4)%1).y, path.getPointAt((pct2+.4)%1).z);l4.position.set(path.getPointAt((pct2+.6)%1).x, path.getPointAt((pct2+.6)%1).y, path.getPointAt((pct2+.6)%1).z);l5.position.set(path.getPointAt((pct2+.8)%1).x, path.getPointAt((pct2+.8)%1).y, path.getPointAt((pct2+.8)%1).z);renderer.render(scene, camera);requestAnimationFrame(render); } requestAnimationFrame(render); p = [[389,246,0],[410,255,20],[413,268,7],[431,261,12],[418,244,30],[416,217,25],[420,205,8],[427,227,-20],[432,236,5],[444,228,12],[451,232,41],[446,246,72],[443,264,96],[446,278,65],[463,267,20],[460,258,-10],[464,243,-20],[459,233,0],[475,225,22],[484,225,29],[490,214,51],[476,202,55],[462,202,55],[446,205,42],[440,192,42],[430,183,72],[413,184,58],[406,191,32],[406,207,0],[402,220,0],[390,222,20],[385,228,10],[389,246,0] ];

点击直接资料领取

如果你在学习python或者Java哪怕是C遇到问题都可以来给我留言，因为在学习初期新手总会走很多弯路，这个时候如果没有有个人来帮一把的话很容易就放弃了。身边很多这样的例子许多人学着学着就转了专业换了方向，不仅是自身问题还是没有正确的学习。所以作为一个过来人我希望有问题给我留言，说不上是帮助就是顺手敲几行字的事情。

这里有python，Java学习资料还有有有趣好玩的编程项目，更有难寻的各种资源。反正看看也不亏。

总结

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