1 <!DOCTYPE html>
2 <html>
3 <head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
4 <title>HTML5烟花燃放特效代码</title>
5
6 <style>
7 html,body{height:100%;margin:0;padding:0}
8 ul,li{text-indent:0;text-decoration:none;margin:0;padding:0}
9 img{border:0}
10 body{background-color:#000;color:#999;font:100%/18px helvetica, arial, sans-serif}
11 canvas{cursor:crosshair;display:block;left:0;position:absolute;top:0;z-index:20}
12 *{
13 margin: 0px;
14 padding: 0px;
15 }
16 #bg_Img{
17 width: 1920px;
18 height: 1500px;
19 border: 1px solid transparent;
20 background: url("start.gif") repeat;
21 text-align: center;
22 }
23 ul{
24 width: 5555px;
25 height: 200px;
26 }
27 li{
28 font: 120px/190px "楷体";
29 color: white;
30 text-shadow: 5px 10px 10px 10px;
31 list-style: none;
32 float: left;
33 display: none;
34 }
35 #text_bd{
36 width: 600px;
37 height: 200px;
38 border: 5px solid transparent;
39 margin-left: 200px;
40 }
41 #mouse_click{
42 margin: 0px auto;
43 text-align: center;
44 color: white;
45 }
46 </style>
47
48 </head>
49 <body>
50 <div id="bg_Img">
51 <div id="text_bd">
52 <ul>
53 <li>O(∩_∩)O~~</li>
54 <li>同</li>
55 <li>学</li>
56 <li>们</li>
57 <li>节</li>
58 <li>日</li>
59 <li>快</li>
60 <li>乐</li>
61 <li>~~</li>
62 </ul>
63 </div>
<div id="mouse_click">鼠标点击释放烟花效果</div>
65 </div>
66 <script type="text/javascript" src="jquery-3.1.1.js"></script>
67 <script type="text/javascript">
68 var aLi=document.querySelectorAll("li");
69 setInterval(a,1000);
70 setInterval(b,2000);
71 setInterval(c,3000);
72 setInterval(d,4000);
73 setInterval(e,5000);
74 setInterval(f,6000);
75 setInterval(g,7000);
76 setInterval(h,8000);
77 function a() {
78 aLi[0].style.display = "block"
79 }
80 function b() {
81 aLi[1].style.display = "block"
82 }
83 function c() {
84 aLi[2].style.display = "block"
85 }
86 function d() {
87 aLi[3].style.display = "block"
88 }
function e() {
90 aLi[4].style.display = "block"
91 }
92 function f() {
93 aLi[5].style.display = "block"
94 }
95 function g() {
96 aLi[6].style.display = "block"
97 }
98 function h() {
99 aLi[7].style.display = "block"
100 }
101 $(function(){
102 var Fireworks = function(){
103 var self = this;
104 var rand = function(rMi, rMa){return ~~((Math.random()*(rMa-rMi+1))+rMi);}
105 var hitTest = function(x1, y1, w1, h1, x2, y2, w2, h2){return !(x1 + w1 < x2 || x2 + w2 < x1 || y1 + h1 < y2 || y2 + h2 < y1);};
106 window.requestAnimFrame=function(){return window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||window.oRequestAnimationFrame||window.msRequestAnimationFrame||function(a){window.setTimeout(a,1E3/60)}}();
107
108 self.init = function(){
109 self.canvas = document.createElement('canvas');
110 self.canvas.width = self.cw = $(window).innerWidth();
111 self.canvas.height = self.ch = $(window).innerHeight();
112 self.particles = [];
113 self.partCount = 150;
114 self.fireworks = [];
115 self.mx = self.cw/2;
116 self.my = self.ch/2;
117 self.currentHue = 30;
118 self.partSpeed = 5;
119 self.partSpeedVariance = 10;
120 self.partWind = 50;
121 self.partFriction = 5;
122 self.partGravity = 1;
123 self.hueMin = 0;
124 self.hueMax = 360;
125 self.fworkSpeed = 4;
126 self.fworkAccel = 10;
127 self.hueVariance = 30;
128 self.flickerDensity = 25;
129 self.showShockwave = true;
130 self.showTarget = false;
131 self.clearAlpha = 25;
132
133 $(document.body).append(self.canvas);
134 self.ctx = self.canvas.getContext('2d');
135 self.ctx.lineCap = 'round';
136 self.ctx.lineJoin = 'round';
137 self.lineWidth = 1;
138 self.bindEvents();
139 self.canvasLoop();
140
141 self.canvas.onselectstart = function() {
142 return false;
143 };
144 };
145
146 self.createParticles = function(x,y, hue){
147 var countdown = self.partCount;
148 while(countdown--){
149 var newParticle = {
150 x: x,
151 y: y,
152 coordLast: [
153 {x: x, y: y},
154 {x: x, y: y},
155 {x: x, y: y}
156 ],
157 angle: rand(0, 360),
158 speed: rand(((self.partSpeed - self.partSpeedVariance) <= 0) ? 1 : self.partSpeed - self.partSpeedVariance, (self.partSpeed + self.partSpeedVariance)),
159 friction: 1 - self.partFriction/100,
160 gravity: self.partGravity/2,
161 hue: rand(hue-self.hueVariance, hue+self.hueVariance),
162 brightness: rand(50, 80),
163 alpha: rand(40,100)/100,
1 decay: rand(10, 50)/1000,
165 wind: (rand(0, self.partWind) - (self.partWind/2))/25,
166 lineWidth: self.lineWidth
167 };
168 self.particles.push(newParticle);
169 }
170 };
171
172
173 self.updateParticles = function(){
174 var i = self.particles.length;
175 while(i--){
176 var p = self.particles[i];
177 var radians = p.angle * Math.PI / 180;
178 var vx = Math.cos(radians) * p.speed;
179 var vy = Math.sin(radians) * p.speed;
180 p.speed *= p.friction;
181
182 p.coordLast[2].x = p.coordLast[1].x;
183 p.coordLast[2].y = p.coordLast[1].y;
184 p.coordLast[1].x = p.coordLast[0].x;
185 p.coordLast[1].y = p.coordLast[0].y;
186 p.coordLast[0].x = p.x;
187 p.coordLast[0].y = p.y;
188
1 p.x += vx;
190 p.y += vy;
191 p.y += p.gravity;
192
193 p.angle += p.wind;
194 p.alpha -= p.decay;
195
196 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){
197 self.particles.splice(i, 1);
198 }
199 };
200 };
201
202 self.drawParticles = function(){
203 var i = self.particles.length;
204 while(i--){
205 var p = self.particles[i];
206
207 var coordRand = (rand(1,3)-1);
208 self.ctx.beginPath();
209 self.ctx.moveTo(Math.round(p.coordLast[coordRand].x), Math.round(p.coordLast[coordRand].y));
210 self.ctx.lineTo(Math.round(p.x), Math.round(p.y));
211 self.ctx.closePath();
212 self.ctx.strokeStyle = 'hsla('+p.hue+', 100%, '+p.brightness+'%, '+p.alpha+')';
213 self.ctx.stroke();
214
215 if(self.flickerDensity > 0){
216 var inverseDensity = 50 - self.flickerDensity;
217 if(rand(0, inverseDensity) === inverseDensity){
218 self.ctx.beginPath();
219 self.ctx.arc(Math.round(p.x), Math.round(p.y), rand(p.lineWidth,p.lineWidth+3)/2, 0, Math.PI*2, false)
220 self.ctx.closePath();
221 var randAlpha = rand(50,100)/100;
222 self.ctx.fillStyle = 'hsla('+p.hue+', 100%, '+p.brightness+'%, '+randAlpha+')';
223 self.ctx.fill();
224 }
225 }
226 };
227 };
228
229
230 self.createFireworks = function(startX, startY, targetX, targetY){
231 var newFirework = {
232 x: startX,
233 y: startY,
234 startX: startX,
235 startY: startY,
236 hitX: false,
237 hitY: false,
238 coordLast: [
239 {x: startX, y: startY},
240 {x: startX, y: startY},
241 {x: startX, y: startY}
242 ],
243 targetX: targetX,
244 targetY: targetY,
245 speed: self.fworkSpeed,
246 angle: Math.atan2(targetY - startY, targetX - startX),
247 shockwaveAngle: Math.atan2(targetY - startY, targetX - startX)+(90*(Math.PI/180)),
248 acceleration: self.fworkAccel/100,
249 hue: self.currentHue,
250 brightness: rand(50, 80),
251 alpha: rand(50,100)/100,
252 lineWidth: self.lineWidth
253 };
254 self.fireworks.push(newFirework);
255
256 };
257
258
259 self.updateFireworks = function(){
260 var i = self.fireworks.length;
261
262 while(i--){
263 var f = self.fireworks[i];
2 self.ctx.lineWidth = f.lineWidth;
265
266 vx = Math.cos(f.angle) * f.speed,
267 vy = Math.sin(f.angle) * f.speed;
268 f.speed *= 1 + f.acceleration;
269 f.coordLast[2].x = f.coordLast[1].x;
270 f.coordLast[2].y = f.coordLast[1].y;
271 f.coordLast[1].x = f.coordLast[0].x;
272 f.coordLast[1].y = f.coordLast[0].y;
273 f.coordLast[0].x = f.x;
274 f.coordLast[0].y = f.y;
275
276 if(f.startX >= f.targetX){
277 if(f.x + vx <= f.targetX){
278 f.x = f.targetX;
279 f.hitX = true;
280 } else {
281 f.x += vx;
282 }
283 } else {
284 if(f.x + vx >= f.targetX){
285 f.x = f.targetX;
286 f.hitX = true;
287 } else {
288 f.x += vx;
2 }
290 }
291
292 if(f.startY >= f.targetY){
293 if(f.y + vy <= f.targetY){
294 f.y = f.targetY;
295 f.hitY = true;
296 } else {
297 f.y += vy;
298 }
299 } else {
300 if(f.y + vy >= f.targetY){
301 f.y = f.targetY;
302 f.hitY = true;
303 } else {
304 f.y += vy;
305 }
306 }
307
308 if(f.hitX && f.hitY){
309 self.createParticles(f.targetX, f.targetY, f.hue);
310 self.fireworks.splice(i, 1);
311
312 }
313 };
314 };
315
316 self.drawFireworks = function(){
317 var i = self.fireworks.length;
318 self.ctx.globalCompositeOperation = 'lighter';
319 while(i--){
320 var f = self.fireworks[i];
321 self.ctx.lineWidth = f.lineWidth;
322
323 var coordRand = (rand(1,3)-1);
324 self.ctx.beginPath();
325 self.ctx.moveTo(Math.round(f.coordLast[coordRand].x), Math.round(f.coordLast[coordRand].y));
326 self.ctx.lineTo(Math.round(f.x), Math.round(f.y));
327 self.ctx.closePath();
328 self.ctx.strokeStyle = 'hsla('+f.hue+', 100%, '+f.brightness+'%, '+f.alpha+')';
329 self.ctx.stroke();
330
331 if(self.showTarget){
332 self.ctx.save();
333 self.ctx.beginPath();
334 self.ctx.arc(Math.round(f.targetX), Math.round(f.targetY), rand(1,8), 0, Math.PI*2, false)
335 self.ctx.closePath();
336 self.ctx.lineWidth = 1;
337 self.ctx.stroke();
338 self.ctx.restore();
339 }
340
341 if(self.showShockwave){
342 self.ctx.save();
343 self.ctx.translate(Math.round(f.x), Math.round(f.y));
344 self.ctx.rotate(f.shockwaveAngle);
345 self.ctx.beginPath();
346 self.ctx.arc(0, 0, 1*(f.speed/5), 0, Math.PI, true);
347 self.ctx.strokeStyle = 'hsla('+f.hue+', 100%, '+f.brightness+'%, '+rand(25, 60)/100+')';
348 self.ctx.lineWidth = f.lineWidth;
349 self.ctx.stroke();
350 self.ctx.restore();
351 }
352 };
353 };
354
355 self.bindEvents = function(){
356 $(window).on('resize', function(){
357 clearTimeout(self.timeout);
358 self.timeout = setTimeout(function() {
359 self.canvas.width = self.cw = $(window).innerWidth();
360 self.canvas.height = self.ch = $(window).innerHeight();
361 self.ctx.lineCap = 'round';
362 self.ctx.lineJoin = 'round';
363 }, 100);
3 });
365
366 $(self.canvas).on('mousedown', function(e){
367 self.mx = e.pageX - self.canvas.offsetLeft;
368 self.my = e.pageY - self.canvas.offsetTop;
369 self.currentHue = rand(self.hueMin, self.hueMax);
370 self.createFireworks(self.cw/2, self.ch, self.mx, self.my);
371
372 $(self.canvas).on('mousemove.fireworks', function(e){
373 self.mx = e.pageX - self.canvas.offsetLeft;
374 self.my = e.pageY - self.canvas.offsetTop;
375 self.currentHue = rand(self.hueMin, self.hueMax);
376 self.createFireworks(self.cw/2, self.ch, self.mx, self.my);
377 });
378 });
379
380 $(self.canvas).on('mouseup', function(e){
381 $(self.canvas).off('mousemove.fireworks');
382 });
383
384 }
385
386 self.clear = function(){
387 self.particles = [];
388 self.fireworks = [];
3 self.ctx.clearRect(0, 0, self.cw, self.ch);
390 };
391
392
393 self.canvasLoop = function(){
394 requestAnimFrame(self.canvasLoop, self.canvas);
395 self.ctx.globalCompositeOperation = 'destination-out';
396 self.ctx.fillStyle = 'rgba(0,0,0,'+self.clearAlpha/100+')';
397 self.ctx.fillRect(0,0,self.cw,self.ch);
398 self.updateFireworks();
399 self.updateParticles();
400 self.drawFireworks();
401 self.drawParticles();
402
403 };
404
405 self.init();
406
407 }
408 var fworks = new Fireworks();
409
410 });
411
412 </script>
413
414 </body>
415 </html>
广大网友们!因为这是放假的时候老师给发的!所以我也看不太懂有些东西!实在是抱歉 ? 有什么不明白的,就留言告诉我!我去找我曾经的老师问问,虽然他已经退休好久了!!
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