本文目录一览：
如何用javascript做出点击屏幕产生烟花效果
!DOCTYPE html
!-- saved from url= --
html
headmeta http-equiv="Content-Type" content="text/html; charset=UTF-8"
meta content="width=device-width,height=device-height,inital-scale=1.0,maximum-scale=1.0,user-scalable=no" name="viewport"
meta name="apple-mobile-web-app-capable" content="yes"
meta name="apple-mobile-web-app-status-bar-style" content="black"
title烟花/title
style type="text/css"
html,body{height:100%;margin:0;padding:0}
ul,li{text-indent:0;text-decoration:none;margin:0;padding:0}
img{border:0}
body{background-color:#000;color:#999;font:100%/18px helvetica, arial, sans-serif}
canvas{cursor:crosshair;display:block;left:0;position:absolute;top:0;z-index:20}
#header img{width:100%; height:20%;}
#bg img{width:100%; height:80%;}
#header,#bg{position:fixed;left:0;right:0;z-index:10}
#header{top:0}
#bg{position:fixed;z-index:1;}
audio{position:fixed;display:none;bottom:0;left:0;right:0;width:100%;z-index:5}
/style
link rel="shortcut icon" type="image/x-icon" href=""
style type="text/css"/stylestyle id="style-1-cropbar-clipper"
.en-markup-crop-options {
top: 18px !important;
left: 50% !important;
margin-left: -100px !important;
width: 200px !important;
border: 2px rgba(255,255,255,.38) solid !important;
border-radius: 4px !important;
}
.en-markup-crop-options div div:first-of-type {
margin-left: 0px !important;
}
#.bg {
background-color: black;
}
/style
/head
body
div id="bg"/div
script src=""/script
script type="text/javascript"
$(function(){
var Fireworks = function(){
var self = this;
var rand = function(rMi, rMa){return ~~((Math.random()*(rMa-rMi+1))+rMi);}
var hitTest = function(x1, y1, w1, h1, x2, y2, w2, h2){return !(x1 + w1 x2 || x2 + w2 x1 || y1 + h1 y2 || y2 + h2 y1);};
window.requestAnimFrame=function(){return window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||window.oRequestAnimationFrame||window.msRequestAnimationFrame||function(a){window.setTimeout(a,1E3/60)}}();
self.init = function(){
self.canvas = document.createElement('canvas');
self.canvas.width = self.cw = $(window).innerWidth();
self.canvas.height = self.ch = $(window).innerHeight();
self.particles = [];
self.partCount = 150;
self.fireworks = [];
self.mx = self.cw/2;
self.my = self.ch/2;
self.currentHue = 30;
self.partSpeed = 5;
self.partSpeedVariance = 10;
self.partWind = 50;
self.partFriction = 5;
self.partGravity = 1;
self.hueMin = 0;
self.hueMax = 360;
self.fworkSpeed = 4;
self.fworkAccel = 10;
self.hueVariance = 30;
self.flickerDensity = 25;
self.showShockwave = true;
self.showTarget = false;
self.clearAlpha = 25;
$(document.body).append(self.canvas);
self.ctx = self.canvas.getContext('2d');
self.ctx.lineCap = 'round';
self.ctx.lineJoin = 'round';
self.lineWidth = 1;
self.bindEvents();
self.canvasLoop();
self.canvas.onselectstart = function() {
return false;
};
};
self.createParticles = function(x,y, hue){
var countdown = self.partCount;
while(countdown--){
var newParticle = {
x: x,
y: y,
coordLast: [
{x: x, y: y},
{x: x, y: y},
{x: x, y: y}
],
angle: rand(0, 360),
speed: rand(((self.partSpeed - self.partSpeedVariance) = 0) ? 1 : self.partSpeed - self.partSpeedVariance, (self.partSpeed + self.partSpeedVariance)),
friction: 1 - self.partFriction/100,
gravity: self.partGravity/2,
hue: rand(hue-self.hueVariance, hue+self.hueVariance),
brightness: rand(50, 80),
alpha: rand(40,100)/100,
decay: rand(10, 50)/1000,
wind: (rand(0, self.partWind) - (self.partWind/2))/25,
lineWidth: self.lineWidth
};
self.particles.push(newParticle);
}
};
self.updateParticles = function(){
var i = self.particles.length;
while(i--){
var p = self.particles[i];
var radians = p.angle * Math.PI / 180;
var vx = Math.cos(radians) * p.speed;
var vy = Math.sin(radians) * p.speed;
p.speed *= p.friction;
p.coordLast[2].x = p.coordLast[1].x;
p.coordLast[2].y = p.coordLast[1].y;
p.coordLast[1].x = p.coordLast[0].x;
p.coordLast[1].y = p.coordLast[0].y;
p.coordLast[0].x = p.x;
p.coordLast[0].y = p.y;
p.x += vx;
p.y += vy;
p.y += p.gravity;
p.angle += p.wind;
p.alpha -= p.decay;
if(!hitTest(0,0,self.cw,self.ch,p.x-p.radius, p.y-p.radius, p.radius*2, p.radius*2) || p.alpha .05){
self.particles.splice(i, 1);
}
};
};
self.drawParticles = function(){
var i = self.particles.length;
while(i--){
var p = self.particles[i];
var coordRand = (rand(1,3)-1);
self.ctx.beginPath();
self.ctx.moveTo(Math.round(p.coordLast[coordRand].x), Math.round(p.coordLast[coordRand].y));
self.ctx.lineTo(Math.round(p.x), Math.round(p.y));
self.ctx.closePath();
self.ctx.strokeStyle = 'hsla('+p.hue+', 100%, '+p.brightness+'%, '+p.alpha+')';
self.ctx.stroke();
if(self.flickerDensity 0){
var inverseDensity = 50 - self.flickerDensity;
if(rand(0, inverseDensity) === inverseDensity){
self.ctx.beginPath();
self.ctx.arc(Math.round(p.x), Math.round(p.y), rand(p.lineWidth,p.lineWidth+3)/2, 0, Math.PI*2, false)
self.ctx.closePath();
var randAlpha = rand(50,100)/100;
self.ctx.fillStyle = 'hsla('+p.hue+', 100%, '+p.brightness+'%, '+randAlpha+')';
self.ctx.fill();
}
}
};
};
self.createFireworks = function(startX, startY, targetX, targetY){
var newFirework = {
x: startX,
y: startY,
startX: startX,
startY: startY,
hitX: false,
hitY: false,
coordLast: [
{x: startX, y: startY},
{x: startX, y: startY},
{x: startX, y: startY}
],
targetX: targetX,
targetY: targetY,
speed: self.fworkSpeed,
angle: Math.atan2(targetY - startY, targetX - startX),
shockwaveAngle: Math.atan2(targetY - startY, targetX - startX)+(90*(Math.PI/180)),
acceleration: self.fworkAccel/100,
hue: self.currentHue,
brightness: rand(50, 80),
alpha: rand(50,100)/100,
lineWidth: self.lineWidth
};
self.fireworks.push(newFirework);
};
self.updateFireworks = function(){
var i = self.fireworks.length;
while(i--){
var f = self.fireworks[i];
self.ctx.lineWidth = f.lineWidth;
vx = Math.cos(f.angle) * f.speed,
vy = Math.sin(f.angle) * f.speed;
f.speed *= 1 + f.acceleration;
f.coordLast[2].x = f.coordLast[1].x;
f.coordLast[2].y = f.coordLast[1].y;
f.coordLast[1].x = f.coordLast[0].x;
f.coordLast[1].y = f.coordLast[0].y;
f.coordLast[0].x = f.x;
f.coordLast[0].y = f.y;
if(f.startX = f.targetX){
if(f.x + vx = f.targetX){
f.x = f.targetX;
f.hitX = true;
} else {
f.x += vx;
}
} else {
if(f.x + vx = f.targetX){
f.x = f.targetX;
f.hitX = true;
} else {
f.x += vx;
}
}
if(f.startY = f.targetY){
if(f.y + vy = f.targetY){
f.y = f.targetY;
f.hitY = true;
} else {
f.y += vy;
}
} else {
if(f.y + vy = f.targetY){
f.y = f.targetY;
f.hitY = true;
} else {
f.y += vy;
}
}
if(f.hitX f.hitY){
self.createParticles(f.targetX, f.targetY, f.hue);
self.fireworks.splice(i, 1);
}
};
};
self.drawFireworks = function(){
var i = self.fireworks.length;
self.ctx.globalCompositeOperation = 'lighter';
while(i--){
var f = self.fireworks[i];
self.ctx.lineWidth = f.lineWidth;
var coordRand = (rand(1,3)-1);
self.ctx.beginPath();
self.ctx.moveTo(Math.round(f.coordLast[coordRand].x), Math.round(f.coordLast[coordRand].y));
self.ctx.lineTo(Math.round(f.x), Math.round(f.y));
self.ctx.closePath();
self.ctx.strokeStyle = 'hsla('+f.hue+', 100%, '+f.brightness+'%, '+f.alpha+')';
self.ctx.stroke();
if(self.showTarget){
self.ctx.save();
self.ctx.beginPath();
self.ctx.arc(Math.round(f.targetX), Math.round(f.targetY), rand(1,8), 0, Math.PI*2, false)
self.ctx.closePath();
self.ctx.lineWidth = 1;
self.ctx.stroke();
self.ctx.restore();
}
if(self.showShockwave){
self.ctx.save();
self.ctx.translate(Math.round(f.x), Math.round(f.y));
self.ctx.rotate(f.shockwaveAngle);
self.ctx.beginPath();
self.ctx.arc(0, 0, 1*(f.speed/5), 0, Math.PI, true);
self.ctx.strokeStyle = 'hsla('+f.hue+', 100%, '+f.brightness+'%, '+rand(25, 60)/100+')';
self.ctx.lineWidth = f.lineWidth;
self.ctx.stroke();
self.ctx.restore();
}
};
};
self.bindEvents = function(){
$(window).on('resize', function(){
clearTimeout(self.timeout);
self.timeout = setTimeout(function() {
self.canvas.width = self.cw = $(window).innerWidth();
self.canvas.height = self.ch = $(window).innerHeight();
self.ctx.lineCap = 'round';
self.ctx.lineJoin = 'round';
}, 100);
});
$(self.canvas).on('mousedown', function(e){
self.mx = e.pageX - self.canvas.offsetLeft;
self.my = e.pageY - self.canvas.offsetTop;
self.currentHue = rand(self.hueMin, self.hueMax);
self.createFireworks(self.cw/2, self.ch, self.mx, self.my);
$(self.canvas).on('mousemove.fireworks', function(e){
self.mx = e.pageX - self.canvas.offsetLeft;
self.my = e.pageY - self.canvas.offsetTop;
self.currentHue = rand(self.hueMin, self.hueMax);
self.createFireworks(self.cw/2, self.ch, self.mx, self.my);
});
});
$(self.canvas).on('mouseup', function(e){
$(self.canvas).off('mousemove.fireworks');
});
}
self.clear = function(){
self.particles = [];
self.fireworks = [];
self.ctx.clearRect(0, 0, self.cw, self.ch);
};
self.canvasLoop = function(){
requestAnimFrame(self.canvasLoop, self.canvas);
self.ctx.globalCompositeOperation = 'destination-out';
self.ctx.fillStyle = 'rgba(0,0,0,'+self.clearAlpha/100+')';
self.ctx.fillRect(0,0,self.cw,self.ch);
self.updateFireworks();
self.updateParticles();
self.drawFireworks();
self.drawParticles();
};
self.init();
}
var fworks = new Fireworks();
});
/script
script type="text/javascript"
$(document).ready(function() {
setTimeout(function() {
$("#header").hide("slow");
},2000);
});
/script
/body
/html
flash怎么做烟花绽放的效果
你先做好烟花绽放的效果（最好是影片剪辑的元件）
再新建一个按钮元件
是新建 不是在公用库上拿
在按钮中的＂弹起＂侦
上新建一个＂小矩形＂
就是一个方框
将其变成一个影片剪辑的元件
在＂属性面板＂上
有个Alpha（透明度）英文
将他变成＂0＂
分另在指针经过和按下
点右键或按F6创建头键侦
出返场景
再新建一个影片剪辑的元件
留出第一帧
就是第一侦是空白关键帧或按F7
第二帧开始做烟花动画
第三帧开始做烟花动画
第四帧开始做烟花动画
新建一层
在＂第一帧＂上
放入按钮
右击按钮
有个＂动作＂－＂全局函数＂－＂时间轴控制＂
输入
on(rollOver){
play();
}
Plqy（开始播放影片）的英文
on（rollOver)是当以生鼠标特定动作时的执行动作
然后
选中第一帧
就是按钮那一帧
有个＂动作＂－＂全局函数＂－＂时间轴控制＂
不是点按钮
有个Stop（停止播放影片）的英文
双击他
然后
回到场景中
把烟花绽放的那个影片元件
放出来
排成一排排
放满整个舞台
播放影片
OK
怎样做一个烟花动画，谢谢
用maya做。很简单！
1.打开maya界面，在左上角的物体类型框中选择Dynamics（动力学）。
2.在最上面的工具栏中选择Effects下的creat fireworks（建议先打开后面的“方块”图形，改变一下Num rockets的数目，及烟火的数目，点击“creat”，
3。选择时间轴右侧的播放按钮，烟火动画便完成了。
