网页烟花特效方便使用，更能给养眼享受，复制黏贴就能使用，快来试试吧。这篇文章主要介绍了html+javascript烟花3D特效（亲测可用）,需要的朋友可以参考下 <!doc
网页烟花特效方便使用，更能给养眼享受，复制黏贴就能使用，快来试试吧。这篇文章主要介绍了html+javascript烟花3D特效（亲测可用）,需要的朋友可以参考下
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="Generator" content="EditPlus®">
<meta name="Author" content="">
<meta name="KeyWords" content="">
<meta name="Description" content="">
<title>Document</title>
<style>
html,body{
margin:0px;
width:100%;
height:100%;
overflow:hidden;
background:#000;
}
#canvas{
width:100%;
height:100%;
}
</style>
</head>
<body>
<canvas id="canvas"></canvas>
<script>
function initVars(){
pi=Math.PI;
ctx=canvas.getContext("2d");
canvas.width=canvas.clientWidth;
canvas.height=canvas.clientHeight;
cx=canvas.width/2;
cy=canvas.height/2;
playerZ=-25;
playerX=playerY=playerVX=playerVY=playerVZ=pitch=yaw=pitchV=yawV=0;
scale=600;
seedTimer=0;seedInterval=5,seedLife=100;gravity=.02;
seeds=new Array();
sparkPics=new Array();
s="https://cantelope.org/NYE/";
for(i=1;i<=10;++i){
sparkPic=new Image();
sparkPic.src=s+"spark"+i+".png";
sparkPics.push(sparkPic);
}
sparks=new Array();
pow1=new Audio(s+"pow1.ogg");
pow2=new Audio(s+"pow2.ogg");
pow3=new Audio(s+"pow3.ogg");
pow4=new Audio(s+"pow4.ogg");
frames = 0;
}
function rasterizePoint(x,y,z){
var p,d;
x-=playerX;
y-=playerY;
z-=playerZ;
p=Math.atan2(x,z);
d=Math.sqrt(x*x+z*z);
x=Math.sin(p-yaw)*d;
z=Math.cos(p-yaw)*d;
p=Math.atan2(y,z);
d=Math.sqrt(y*y+z*z);
y=Math.sin(p-pitch)*d;
z=Math.cos(p-pitch)*d;
var rx1=-1000,ry1=1,rx2=1000,ry2=1,rx3=0,ry3=0,rx4=x,ry4=z,uc=(ry4-ry3)*(rx2-rx1)-(rx4-rx3)*(ry2-ry1);
if(!uc) return {x:0,y:0,d:-1};
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=.000000001;
if(ua>0&&ua<1&&ub>0&&ub<1){
return {
x:cx+(rx1+ua*(rx2-rx1))*scale,
y:cy+y/z*scale,
d:Math.sqrt(x*x+y*y+z*z)
};
}else{
return {
x:cx+(rx1+ua*(rx2-rx1))*scale,
y:cy+y/z*scale,
d:-1
};
}
}
function spawnSeed(){
seed=new Object();
seed.x=-50+Math.random()*100;
seed.y=25;
seed.z=-50+Math.random()*100;
seed.vx=.1-Math.random()*.2;
seed.vy=-1.5;//*(1+Math.random()/2);
seed.vz=.1-Math.random()*.2;
seed.born=frames;
seeds.push(seed);
}
function splode(x,y,z){
t=5+parseInt(Math.random()*150);
sparkV=1+Math.random()*2.5;
type=parseInt(Math.random()*3);
switch(type){
case 0:
pic1=parseInt(Math.random()*10);
break;
case 1:
pic1=parseInt(Math.random()*10);
do{ pic2=parseInt(Math.random()*10); }while(pic2==pic1);
break;
case 2:
pic1=parseInt(Math.random()*10);
do{ pic2=parseInt(Math.random()*10); }while(pic2==pic1);
do{ pic3=parseInt(Math.random()*10); }while(pic3==pic1 || pic3==pic2);
break;
}
for(m=1;m<t;++m){
spark=new Object();
spark.x=x; spark.y=y; spark.z=z;
p1=pi*2*Math.random();
p2=pi*Math.random();
v=sparkV*(1+Math.random()/6)
spark.vx=Math.sin(p1)*Math.sin(p2)*v;
spark.vz=Math.cos(p1)*Math.sin(p2)*v;
spark.vy=Math.cos(p2)*v;
switch(type){
case 0: spark.img=sparkPics[pic1]; break;
case 1:
spark.img=sparkPics[parseInt(Math.random()*2)?pic1:pic2];
break;
case 2:
switch(parseInt(Math.random()*3)){
case 0: spark.img=sparkPics[pic1]; break;
case 1: spark.img=sparkPics[pic2]; break;
case 2: spark.img=sparkPics[pic3]; break;
}
break;
}
spark.radius=25+Math.random()*50;
spark.alpha=1;
spark.trail=new Array();
sparks.push(spark);
}
pow = new Audio(`${s}pow${~~(Math.random()*4)}.ogg`);
// switch(parseInt(Math.random()*4)){
// case 0: pow=new Audio(s+"pow1.ogg"); break;
// case 1: pow=new Audio(s+"pow2.ogg"); break;
// case 2: pow=new Audio(s+"pow3.ogg"); break;
// case 3: pow=new Audio(s+"pow4.ogg"); break;
// }
d=Math.sqrt((x-playerX)*(x-playerX)+(y-playerY)*(y-playerY)+(z-playerZ)*(z-playerZ));
pow.volume=1.5/(1+d/10);
pow.play();
}
function doLogic(){
if(seedTimer<frames){
seedTimer=frames+seedInterval*Math.random()*10;
spawnSeed();
}
for(i=0;i<seeds.length;++i){
seeds[i].vy+=gravity;
seeds[i].x+=seeds[i].vx;
seeds[i].y+=seeds[i].vy;
seeds[i].z+=seeds[i].vz;
if(frames-seeds[i].born>seedLife){
splode(seeds[i].x,seeds[i].y,seeds[i].z);
seeds.splice(i,1);
}
}
for(i=0;i<sparks.length;++i){
if(sparks[i].alpha>0 && sparks[i].radius>5){
sparks[i].alpha-=.01;
sparks[i].radius/=1.02;
sparks[i].vy+=gravity;
point=new Object();
point.x=sparks[i].x;
point.y=sparks[i].y;
point.z=sparks[i].z;
if(sparks[i].trail.length){
x=sparks[i].trail[sparks[i].trail.length-1].x;
y=sparks[i].trail[sparks[i].trail.length-1].y;
z=sparks[i].trail[sparks[i].trail.length-1].z;
d=((point.x-x)*(point.x-x)+(point.y-y)*(point.y-y)+(point.z-z)*(point.z-z));
if(d>9){
sparks[i].trail.push(point);
}
}else{
sparks[i].trail.push(point);
}
if(sparks[i].trail.length>5)sparks[i].trail.splice(0,1);
sparks[i].x+=sparks[i].vx;
sparks[i].y+=sparks[i].vy;
sparks[i].z+=sparks[i].vz;
sparks[i].vx/=1.075;
sparks[i].vy/=1.075;
sparks[i].vz/=1.075;
}else{
sparks.splice(i,1);
}
}
p=Math.atan2(playerX,playerZ);
d=Math.sqrt(playerX*playerX+playerZ*playerZ);
d+=Math.sin(frames/80)/1.25;
t=Math.sin(frames/200)/40;
playerX=Math.sin(p+t)*d;
playerZ=Math.cos(p+t)*d;
yaw=pi+p+t;
}
function rgb(col){
var r = parseInt((.5+Math.sin(col)*.5)*16);
var g = parseInt((.5+Math.cos(col)*.5)*16);
var b = parseInt((.5-Math.sin(col)*.5)*16);
return "#"+r.toString(16)+g.toString(16)+b.toString(16);
}
function draw(){
ctx.clearRect(0,0,cx*2,cy*2);
ctx.fillStyle="#ff8";
for(i=-100;i<100;i+=3){
for(j=-100;j<100;j+=4){
x=i;z=j;y=25;
point=rasterizePoint(x,y,z);
if(point.d!=-1){
size=250/(1+point.d);
d = Math.sqrt(x * x + z * z);
a = 0.75 - Math.pow(d / 100, 6) * 0.75;
if(a>0){
ctx.globalAlpha = a;
ctx.fillRect(point.x-size/2,point.y-size/2,size,size);
}
}
}
}
ctx.globalAlpha=1;
for(i=0;i<seeds.length;++i){
point=rasterizePoint(seeds[i].x,seeds[i].y,seeds[i].z);
if(point.d!=-1){
size=200/(1+point.d);
ctx.fillRect(point.x-size/2,point.y-size/2,size,size);
}
}
point1=new Object();
for(i=0;i<sparks.length;++i){
point=rasterizePoint(sparks[i].x,sparks[i].y,sparks[i].z);
if(point.d!=-1){
size=sparks[i].radius*200/(1+point.d);
if(sparks[i].alpha<0)sparks[i].alpha=0;
if(sparks[i].trail.length){
point1.x=point.x;
point1.y=point.y;
switch(sparks[i].img){
case sparkPics[0]:ctx.strokeStyle="#f84";break;
case sparkPics[1]:ctx.strokeStyle="#84f";break;
case sparkPics[2]:ctx.strokeStyle="#8ff";break;
case sparkPics[3]:ctx.strokeStyle="#fff";break;
case sparkPics[4]:ctx.strokeStyle="#4f8";break;
case sparkPics[5]:ctx.strokeStyle="#f44";break;
case sparkPics[6]:ctx.strokeStyle="#f84";break;
case sparkPics[7]:ctx.strokeStyle="#84f";break;
case sparkPics[8]:ctx.strokeStyle="#fff";break;
case sparkPics[9]:ctx.strokeStyle="#44f";break;
}
for(j=sparks[i].trail.length-1;j>=0;--j){
point2=rasterizePoint(sparks[i].trail[j].x,sparks[i].trail[j].y,sparks[i].trail[j].z);
if(point2.d!=-1){
ctx.globalAlpha=j/sparks[i].trail.length*sparks[i].alpha/2;
ctx.beginPath();
ctx.moveTo(point1.x,point1.y);
ctx.lineWidth=1+sparks[i].radius*10/(sparks[i].trail.length-j)/(1+point2.d);
ctx.lineTo(point2.x,point2.y);
ctx.stroke();
point1.x=point2.x;
point1.y=point2.y;
}
}
}
ctx.globalAlpha=sparks[i].alpha;
ctx.drawImage(sparks[i].img,point.x-size/2,point.y-size/2,size,size);
}
}
}
function frame(){
if(frames>100000){
seedTimer=0;
frames=0;
}
frames++;
draw();
doLogic();
requestAnimationFrame(frame);
}
window.addEventListener("resize",()=>{
canvas.width=canvas.clientWidth;
canvas.height=canvas.clientHeight;
cx=canvas.width/2;
cy=canvas.height/2;
});
initVars();
frame();
</script>
</body>
</html>到此这篇关于html+JavaScript烟花3D简单特效（亲测可用）的文章就介绍到这了,更多相关3D烟花特效内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网！
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本文标题: html+JavaScript烟花3D简单特效（亲测可用）
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