炫酷粒子涡旋动画效果-html代码-BFW代码库

炫酷粒子涡旋动画效果

代码语言：html

所属分类：粒子

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>
<meta charset="utf-8">

<style>
html, body { margin: 0px; width: 100%; height: 100%; overflow: hidden; background: #000; }
#canvas { position: absolute; width: 100%; height: 100%; }
</style>
</head>
<body>
<canvas id="canvas"></canvas>
<script>
function project3D(x,y,z,vars){var p,d;x-=vars.camX;y-=vars.camY-8;z-=vars.camZ;p=Math.atan2(x,z);d=Math.sqrt(x*x+z*z);x=Math.sin(p-vars.yaw)*d;z=Math.cos(p-vars.yaw)*d;p=Math.atan2(y,z);d=Math.sqrt(y*y+z*z);y=Math.sin(p-vars.pitch)*d;z=Math.cos(p-vars.pitch)*d;var rx1=-1000;var ry1=1;var rx2=1000;var ry2=1;var rx3=0;var ry3=0;var rx4=x;var ry4=z;var uc=(ry4-ry3)*(rx2-rx1)-(rx4-rx3)*(ry2-ry1);var ua=((rx4-rx3)*(ry1-ry3)-(ry4-ry3)*(rx1-rx3))/uc;var ub=((rx2-rx1)*(ry1-ry3)-(ry2-ry1)*(rx1-rx3))/uc;if(!z)z=0.000000001;if(ua>0&&ua<1&&ub>0&&ub<1){return{x:vars.cx+(rx1+ua*(rx2-rx1))*vars.scale,y:vars.cy+y/z*vars.scale,d:(x*x+y*y+z*z)}}else{return{d:-1}}}function elevation(x,y,z){var dist=Math.sqrt(x*x+y*y+z*z);if(dist&&z/dist>=-1&&z/dist<=1)return Math.acos(z/dist);return 0.00000001}function rgb(col){col+=0.000001;var r=parseInt((0.5+Math.sin(col)*0.5)*16);var g=parseInt((0.5+Math.cos(col)*0.5)*16);var b=parseInt((0.5-Math.sin(col)*0.5)*16);return"#"+r.toString(16)+g.toString(16)+b.toString(16)}function interpolateColors(RGB1,RGB2,degree){var w2=degree;var w1=1-w2;return[w1*RGB1[0]+w2*RGB2[0],w1*RGB1[1]+w2*RGB2[1],w1*RGB1[2]+w2*RGB2[2]]}function rgbArray(col){col+=0.000001;var r=parseInt((0.5+Math.sin(col)*0.5)*256);var g=parseInt((0.5+Math.cos(col)*0.5)*256);var b=parseInt((0.5-Math.sin(col)*0.5)*256);return[r,g,b]}function colorString(arr){var r=parseInt(arr[0]);var g=parseInt(arr[1]);var b=parseInt(arr[2]);return"#"+("0"+r.toString(16)).slice(-2)+("0"+g.toString(16)).slice(-2)+("0"+b.toString(16)).slice(-2)}function process(vars){if(vars.points.length<vars.initParticles)for(var i=0;i<5;++i)spawnParticle(vars);var p,d,t;p=Math.atan2(vars.camX,vars.camZ);d=Math.sqrt(vars.camX*vars.camX+vars.camZ*vars.camZ);d-=Math.sin(vars.frameNo/80)/25;t=Math.cos(vars.frameNo/300)/165;vars.camX=Math.sin(p+t)*d;vars.camZ=Math.cos(p+t)*d;vars.camY=-Math.sin(vars.frameNo/220)*15;vars.yaw=Math.PI+p+t;vars.pitch=elevation(vars.camX,vars.camZ,vars.camY)-Math.PI/2;var t;for(var i=0;i<vars.points.length;++i){x=vars.points[i].x;y=vars.points[i].y;z=vars.points[i].z;d=Math.sqrt(x*x+z*z)/1.0075;t=.1/(1+d*d/5);p=Math.atan2(x,z)+t;vars.points[i].x=Math.sin(p)*d;vars.points[i].z=Math.cos(p)*d;vars.points[i].y+=vars.points[i].vy*t*((Math.sqrt(vars.distributionRadius)-d)*2);if(vars.points[i].y>vars.vortexHeight/2||d<.25){vars.points.splice(i,1);spawnParticle(vars)}}}function drawFloor(vars){var x,y,z,d,point,a;for(var i=-25;i<=25;i+=.........完整代码请登录后点击上方下载按钮下载查看