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1.抖音HTML龙卷风特效代码是特效特效啥？
2.HTML烟花特效码农代码和人工智能代码对比
抖音HTML龙卷风特效代码是啥？
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>粒子漩涡特效</title>
<style>
html,body{
margin:0px;
width:%;
height:%;
overflow:hidden;
background:#;
}
#canvas{
position:absolute;
width:%;
height:%;
}
</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=-;
var ry1=1;
var rx2=;
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.;
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.;
}
function rgb(col){
col += 0.;
var r = parseInt((0.5+Math.sin(col)*0.5)*);
var g = parseInt((0.5+Math.cos(col)*0.5)*);
var b = parseInt((0.5-Math.sin(col)*0.5)*);
return "#"+r.toString()+g.toString()+b.toString();
}
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.;
var r = parseInt((0.5+Math.sin(col)*0.5)*);
var g = parseInt((0.5+Math.cos(col)*0.5)*);
var b = parseInt((0.5-Math.sin(col)*0.5)*);
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() ).slice (-2)+("0" + g.toString() ).slice (-2)+("0" + b.toString() ).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 / ) / ;
t = Math.cos(vars.frameNo / ) / ;
vars.camX = Math.sin(p + t) * d;
vars.camZ = Math.cos(p + t) * d;
vars.camY = -Math.sin(vars.frameNo / ) * ;
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.;
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<.){
vars.points.splice(i,1);
spawnParticle(vars);
}
}
}
function drawFloor(vars){
var x,y,z,d,point,a;
for (var i = -; i <= ; i += 1) {
for (var j = -; j <= ; j += 1) {
x = i*2;
z = j*2;
y = vars.floor;
d = Math.sqrt(x * x + z * z);
point = project3D(x, y-d*d/, z, vars);
if (point.d != -1) {
size = 1 + / (1 + point.d);
a = 0. - Math.pow(d / , 4) * 0.;
if (a > 0) {
vars.ctx.fillStyle = colorString(interpolateColors(rgbArray(d/-vars.frameNo/),[0,,],.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.fillStyle = "#f";
for (var i = -; i <= ; i += 1) {
for (var j = -; j <= ; j += 1) {
x = i*2;
z = j*2;
y = -vars.floor;
d = Math.sqrt(x * x + z * z);
point = project3D(x, y+d*d/, z, vars);
if (point.d != -1) {
size = 1 + / (1 + point.d);
a = 0. - Math.pow(d / , 4) * 0.;
if (a > 0) {
vars.ctx.fillStyle = colorString(interpolateColors(rgbArray(-d/-vars.frameNo/),[,0,],.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);
}
}
}
}
}
function sortFunction(a,b){
return b.dist-a.dist;
}
function draw(vars){
vars.ctx.globalAlpha=.;
vars.ctx.fillStyle="#";
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), ) * .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);
}
function spawnParticle(vars){
var p,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/+Math.random()*vars.initV;
pt.z=Math.cos(p)*ls;
pt.radius=+*Math.random();
pt.color=pt.radius/+vars.frameNo/;
vars.points.push(pt);
}
function frame(vars) {
if(vars === undefined){
var vars={ };
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;
vars.cx=vars.canvas.width/2;
vars.cy=vars.canvas.height/2;
}, true);
vars.frameNo=0;
vars.camX = 0;
vars.camY = 0;
vars.camZ = -;
vars.pitch = elevation(vars.camX, vars.camZ, vars.camY) - Math.PI / 2;
vars.yaw = 0;
vars.cx=vars.canvas.width/2;
vars.cy=vars.canvas.height/2;
vars.bounding=;
vars.scale=;
vars.floor=.5;
vars.points=[];
vars.initParticles=;
vars.initV=.;
vars.distributionRadius=;
vars.vortexHeight=;
}
vars.frameNo++;
requestAnimationFrame(function() {
frame(vars);
});
process(vars);
draw(vars);
}
frame();
</script>
</body>
</html>
HTML烟花特效码农代码和人工智能代码对比
本文探讨了HTML烟花特效的实现方式，对比了人工码农编码与人工智能自动生成的代码代码大全差异。以下是源码一段详细的代码示例，以帮助理解。特效特效postsql源码
对于人工码农的代码代码大全编码，HTML5的源码spring mvc 注释源码canvas技术是关键。开发者需要掌握基本的特效特效canvas操作，如设置画布大小、代码代码大全绘制线条和填充颜色。源码以下是特效特效一个基础的代码片段：
// 码农编写部分
function drawFirework() {
// ... 详细实现
}
相比之下，人工智能生成的代码代码大全代码示例则更为简洁。例如，源码一个简单的特效特效udp源码易语言JavaScript烟花特效可能如下所示：
// 人工智能编写部分
class Firework {
constructor(imgPath, canvas) {
this.canvas = canvas;
// ... 动态生成和显示烟花
}
}
这段代码创建了一个动态的烟花效果，通过随机位置、代码代码大全速度和大小生成并旋转烟花。源码烟花由一系列旋转图像组成，趣扑源码网站模拟真实烟花的视觉效果。然而，这仅是视频源码和应用基础示例，实际烟花效果可能需要更复杂的算法和图像处理。
