后缀字:html
如果窗口名称有问题就把【<title>粒子风暴</title>】这句话改成【<title>粒子风暴</来自title>】
源代码：
<!DOCTYPEhtml>
<html>
<head>
<metacharse360问答t="utf-8">
<title>粒子风暴</title>
<style>
html,body{
margin:0px;
width:100%;
height:100%;
overflow:hidden;
background:#000;
}
#canvas{
positio我刑军季鱼给沙娘蒸著突n:absolute;
width:100%;
height:100%;
}
</style>
</h今第再木核提激挥星错想ead>
<body>
<canvasid="canvas"></canvas>
<script>
functionproject3D(x,y,z,vars){
varp,d;
x-=vars.camX;
形村连告城双都y-=vars.camY-8;
z-=vars.camZ粉算演触城学致福怕们;
p=Math.atan2(x,z);
d=Math.sqrt(x*x+z*z);
x=Math.sin(p-vars.yaw)*d;
z=Math.c征快需满os(p-vars.yaw)*修包究d;
p=Math.atan2(y,z);
d=Math明同附茶触灯西掌参他.sqrt(y*y+z*执地轴既否括之么错资z);
y=Math.s商拿展切兴袁师棉被in(p-vars.pit讲宪ch)*d;
z=M宁收因所课十青府映什ath.cos(p-vars.pitch)*d;
varrx1=-1000;
varry1=1;
varrx2=10政宣能剧00;
varry2=1;
varrx3=0;
varry3=0;
务行问刘换varrx4=x;
varry4=z;
varuc=(ry4-ry3)散快笑袁石改响场*(rx2-rx1)-(r画深x4-rx3)*(ry2-ry1);
varua=((rx4-rx3)*(ry1-ry3)-(ry4-ry3)*(rx1-rx3))/uc;
varub=((rx2-rx1)*(ry1-ry3)-古督叶织某次波所继所(ry2-ry1)*(rx1-rx3))/uc;
if(!z)z=0.000000001;
if(ua>0&&ua<1&&ub>0&&ub<1){
return{
x:***.cx+(rx1+ua*(rx2-rx1))*vars.scale,
y:***.cy+y/z*vars.scale,
d:(x*x+y*y+z*z)
};
}else{
return{d:-1};
}
}
functionelevation(x,y,z){
vardist=Math.sqrt(x*x+y*y+z*z);
if(dist&&z/dist>=-1&&z/dist<=1)returnMath.acos(z/dist);
return0.00000001;
}
functionrgb(col){
col+=0.000001;
varr=parseInt((0.5+Math.sin(col)*0.5)*16);
varg=parseInt((0.5+Math.cos(col)*0.5)*16);
varb=parseInt((0.5-Math.sin(col)*0.5)*16);
return"#"+r.toString(16)+g.toString(16)+b.toString(16);
}
functioninterpolateColors(RGB1,RGB2,degree){
varw2=degree;
varw1=1-w2;
return[w1*RGB1[0]+w2*RGB2[0],w1*RGB1[1]+w2*RGB2[1],w1*RGB1[2]+w2*RGB2[2]];
}
functionrgbArray(col){
col+=0.000001;
varr=parseInt((0.5+Math.sin(col)*0.5)*256);
varg=parseInt((0.5+Math.cos(col)*0.5)*256);
varb=parseInt((0.5-Math.sin(col)*0.5)*256);
return[r,g,b];
}
functioncolorString(arr){
varr=parseInt(arr[0]);
varg=parseInt(arr[1]);
varb=parseInt(arr[2]);
return"#"+("0"+r.toString(16)).slice(-2)+("0"+g.toString(16)).slice(-2)+("0"+b.toString(16)).slice(-2);
}
functionprocess(vars){
if(vars.points.length<vars.initParticles)for(vari=0;i<5;++i)spawnParticle(vars);
varp,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;
vart;
for(vari=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);
}
}
}
functiondrawFloor(vars){
varx,y,z,d,point,a;
for(vari=-25;i<=25;i+=1){
for(varj=-25;j<=25;j+=1){
x=i*2;
z=j*2;
y=vars.floor;
d=Math.sqrt(x*x+z*z);
point=project3D(x,y-d*d/85,z,vars);
if(point.d!=-1){
size=1+15000/(1+point.d);
a=0.15-Math.pow(d/50,4)*0.15;
if(a>0){
vars.ctx.fillStyle=colorString(interpolateColors(rgbArray(d/26-vars.frameNo/40),[0,128,32],.5+Math.sin(d/6-vars.frameNo/8)/2));
vars.ctx.globalAlpha=a;
vars.ctx.fillRect(point.x-size/2,point.y-size/2,size,size);
}
}
}
}
vars.ctx.fill;
for(vari=-25;i<=25;i+=1){
for(varj=-25;j<=25;j+=1){
x=i*2;
z=j*2;
y=-vars.floor;
d=Math.sqrt(x*x+z*z);
point=project3D(x,y+d*d/85,z,vars);
if(point.d!=-1){
size=1+15000/(1+point.d);
a=0.15-Math.pow(d/50,4)*0.15;
if(a>0){
vars.ctx.fillStyle=colorString(interpolateColors(rgbArray(-d/26-vars.frameNo/40),[32,0,128],.5+Math.sin(-d/6-vars.frameNo/8)/2));
vars.ctx.globalAlpha=a;
vars.ctx.fillRect(point.x-size/2,point.y-size/2,size,size);
}
}
}
}
}
functionsortFunction(a,b){
returnb.dist-a.dist;
}
functiondraw(vars){
vars.ctx.globalAlpha=.15;
vars.ctx.fill;
vars.ctx.fillRect(0,0,canvas.width,canvas.height);
drawFloor(vars);
varpoint,x,y,z,a;
for(vari=0;i<vars.points.length;++i){
x=vars.points[i].x;
y=vars.points[i].y;
z=vars.points[i].z;
point=project3D(x,y,z,vars);
if(point.d!=-1){
vars.points[i].dist=point.d;
size=1+vars.points[i].radius/(1+point.d);
d=Math.abs(vars.points[i].y);
a=.8-Math.pow(d/(vars.vortexHeight/2),1000)*.8;
vars.ctx.globalAlpha=a>=0&&a<=1?a:0;
vars.ctx.fillStyle=rgb(vars.points[i].color);
if(point.x>-1&&point.x<vars.canvas.width&&point.y>-1&&point.y<vars.canvas.height)vars.ctx.fillRect(point.x-size/2,point.y-size/2,size,size);
}
}
vars.points.sort(sortFunction);
}
functionspawnParticle(vars){
varp,ls;
pt={};
p=Math.PI*2*Math.random();
ls=Math.sqrt(Math.random()*vars.distributionRadius);
pt.x=Math.sin(p)*ls;
pt.y=-vars.vortexHeight/2;
pt.vy=vars.initV/20+Math.random()*vars.initV;
pt.z=Math.cos(p)*ls;
pt.radius=200+800*Math.random();
pt.color=pt.radius/1000+vars.frameNo/250;
vars.points.push(pt);
}
functionframe(vars){
if(vars===undefined){
varvars={};
vars.canvas=document.querySelector("canvas");
vars.ctx=vars.canvas.getContext("2d");
vars.canvas.width=document.body.clientWidth;
vars.canvas.height=document.body.clientHeight;
window.addEventListener("resize",function(){
vars.canvas.width=document.body.clientWidth;
vars.canvas.height=document.body.clientHeight;
***.cx=vars.canvas.width/2;
***.cy=vars.canvas.height/2;
},true);
vars.frameNo=0;
vars.camX=0;
vars.camY=0;
vars.camZ=-14;
vars.pitch=elevation(vars.camX,vars.camZ,vars.camY)-Math.PI/2;
vars.yaw=0;
***.cx=vars.canvas.width/2;
***.cy=vars.canvas.height/2;
vars.bounding=10;
vars.scale=500;
vars.floor=26.5;
vars.points=[];
vars.initParticles=700;
vars.initV=.01;
vars.distributionRadius=800;
vars.vortexHeight=25;
}
vars.frameNo++;
requestAnimationFrame(function(){
frame(vars);
});
process(vars);
draw(vars);
}
frame();
</script>
</body>
</html>
标签：风暴,粒子,打造
