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附件
function draw(vars){
vars.ctx.globalAlpha=.15;
vars.ctx.fillStyle="#000";
vars.ctx.fillRect(0, 0, canvas.width, canvas.height);
drawFloor(vars);
var point,x,y,z,a;
for(var i=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);
}
}*
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