canvas+webgl实现多彩粒子烟花绽放动画效果代码-html代码-BFW代码库

canvas+webgl实现多彩粒子烟花绽放动画效果代码

代码语言：html

所属分类：粒子

代码描述：canvas+webgl实现多彩粒子烟花绽放动画效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html>

<head>
    <style>
        canvas{position:absolute;top:0;left:0;background-color:#111;}
    </style>
</head>

<body>
    <canvas id=c></canvas>
    <script>
        var gl =c.getContext('webgl',{preserveDrawingBuffer:true
        }),w =c.width =window.innerWidth,h =c.height =window.innerHeight
        ,webgl ={},opts ={projectileAlpha:.8,projectileLineWidth:1.3,fireworkAngleSpan:.5,baseFireworkVel:3,addedFireworkVel:3,gravity:.03,lowVelBoundary:-.2,xFriction:.995,baseShardVel:1,addedShardVel:.2,fireworks:1000,baseShardsParFirework:10,addedShardsParFirework:10,shardFireworkVelMultiplier:.3,initHueMultiplier:1 / 360,runHueAdder:.1 / 360
        }
        webgl.vertexShaderSource =`
        uniform int u_mode;uniform vec2 u_res;attribute vec4 a_data;varying vec4 v_color;vec3 h2rgb(float h ){return clamp(abs(mod(h *6. + vec3(0,4,2 ),6. ) - 3. ) -1.,0.,1. );}
        void clear(){gl_Position =vec4(a_data.xy,0,1 );v_color =vec4(0,0,0,a_data.w );}
        void draw(){gl_Position =vec4(vec2(1,-1 ) *((a_data.xy / u_res ) *2. - 1. ),0,1 );v_color =vec4(h2rgb(a_data.z ),a_data..........完整代码请登录后点击上方下载按钮下载查看