企业网站定制开发夜景放烟花绽放动画效果
html代码
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"><head> <meta http-equiv="Content-Type" content="text/html;charset=gb2312"> <style> body{margin:0;padding:0;overflow: hidden;} .city{width:100%;position:fixed;bottom: 0px;z-index: 100;} .city img{width: 100%;} </style> <title>html5夜景放烟花绽放动画效果</title></head><body onselectstart = "return false"><div style="height:700px;overflow:hidden;"> <canvas id='cas' style="background-color:rgba(0,5,24,1);">浏览器不支持canvas</canvas> <div class="city"><img src="img/city.png" alt="" /></div> <img src="img/moon.png" alt="" id="moon" style="visibility: hidden;"/> <div style="display:none"> <div class="shape">新年快乐</div> <div class="shape">合家幸福</div> <div class="shape">万事如意</div> <div class="shape">心想事成</div> <div class="shape">财源广进</div> </div> </div> <script> var canvas = document.getElementById("cas"); var ocas = document.createElement("canvas"); var octx = ocas.getContext("2d"); var ctx = canvas.getContext("2d"); ocas.width = canvas.width = window.innerWidth; ocas.height = canvas.height = 700; var bigbooms = []; window.onload = function(){ initAnimate() } function initAnimate(){ drawBg(); lastTime = new Date(); animate(); } var lastTime; function animate(){ ctx.save(); ctx.fillStyle = "rgba(0,5,24,0.1)"; ctx.fillRect(0,0,canvas.width,canvas.height); ctx.restore(); var newTime = new Date(); if(newTime-lastTime>500+(window.innerHeight-767)/2){ var random = Math.random()*100>2?true:false; var x = getRandom(canvas.width/5 , canvas.width*4/5); var y = getRandom(50 , 200); if(random){ var bigboom = new Boom(getRandom(canvas.width/3,canvas.width*2/3) ,2,"#FFF" , {x:x , y:y}); bigbooms.push(bigboom) } else { var bigboom = new Boom(getRandom(canvas.width/3,canvas.width*2/3) ,2,"#FFF" , {x:canvas.width/2 , y:200} , document.querySelectorAll(".shape")[parseInt(getRandom(0, document.querySelectorAll(".shape").length))]); bigbooms.push(bigboom) } lastTime = newTime; console.log(bigbooms) } stars.foreach(function(){ this.paint(); }) drawMoon(); bigbooms.foreach(function(index){ var that = this; if(!this.dead){ this._move(); this._drawLight(); } else{ this.booms.foreach(function(index){ if(!this.dead) { this.moveTo(index); } else if(index === that.booms.length-1){ bigbooms[bigbooms.indexOf(that)] = null; } }) } }); raf(animate); } function drawMoon(){ var moon = document.getElementById("moon"); var centerX = canvas.width-200 , centerY = 100 , width = 80; if(moon.complete){ ctx.drawImage(moon , centerX , centerY , width , width ) } else { moon.onload = function(){ ctx.drawImage(moon ,centerX , centerY , width , width) } } var index = 0; for(var i=0;i<10;i++){ ctx.save(); ctx.beginPath(); ctx.arc(centerX+width/2 , centerY+width/2 , width/2+index , 0 , 2*Math.PI); ctx.fillStyle="rgba(240,219,120,0.005)"; index+=2; ctx.fill(); ctx.restore(); } } Array.prototype.foreach = function(callback){ for(var i=0;i<this.length;i++){ if(this[i]!==null) callback.apply(this[i] , [i]) } } var raf = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback) { window.setTimeout(callback, 1000 / 60); }; canvas.onclick = function(){ var x = event.clientX; var y = event.clientY; var bigboom = new Boom(getRandom(canvas.width/3,canvas.width*2/3) ,2,"#FFF" , {x:x , y:y}); bigbooms.push(bigboom) } // canvas.addEventLisener("touchstart" , function(event){ // var touch = event.targetTouches[0]; // var x = event.pageX; // var y = event.pageY; // var bigboom = new Boom(getRandom(canvas.width/3,canvas.width*2/3) ,2,"#FFF" , {x:x , y:y}); // bigbooms.push(bigboom) // }) var Boom = function(x,r,c,boomArea,shape){ this.booms = []; this.x = x; this.y = (canvas.height+r); this.r = r; this.c = c; this.shape = shape || false; this.boomArea = boomArea; this.theta = 0; this.dead = false; this.ba = parseInt(getRandom(80 , 200)); } Boom.prototype = { _paint:function(){ ctx.save(); ctx.beginPath(); ctx.arc(this.x,this.y,this.r,0,2*Math.PI); ctx.fillStyle = this.c; ctx.fill(); ctx.restore(); }, _move:function(){ var dx = this.boomArea.x - this.x , dy = this.boomArea.y - this.y; this.x = this.x+dx*0.01; this.y = this.y+dy*0.01; if(Math.abs(dx)<=this.ba && Math.abs(dy)<=this.ba){ if(this.shape){ this._shapBoom(); } else this._boom(); this.dead = true; } else { this._paint(); } }, _drawLight:function(){ ctx.save(); ctx.fillStyle = "rgba(255,228,150,0.3)"; ctx.beginPath(); ctx.arc(this.x , this.y , this.r+3*Math.random()+1 , 0 , 2*Math.PI); ctx.fill(); ctx.restore(); }, _boom:function(){ var fragNum = getRandom(30 , 200); var style = getRandom(0,10)>=5? 1 : 2; var color; if(style===1){ color = { a:parseInt(getRandom(128,255)), b:parseInt(getRandom(128,255)), c:parseInt(getRandom(128,255)) } } var fanwei = parseInt(getRandom(300, 400)); for(var i=0;i<fragNum;i++){ if(style===2){ color = { a:parseInt(getRandom(128,255)), b:parseInt(getRandom(128,255)), c:parseInt(getRandom(128,255)) } } var a = getRandom(-Math.PI, Math.PI); var x = getRandom(0, fanwei) * Math.cos(a) + this.x; var y = getRandom(0, fanwei) * Math.sin(a) + this.y; var radius = getRandom(0 , 2) var frag = new Frag(this.x , this.y , radius , color , x , y ); this.booms.push(frag); } }, _shapBoom:function(){ var that = this; putValue(ocas , octx , this.shape , 5, function(dots){ var dx = canvas.width/2-that.x; var dy = canvas.height/2-that.y; for(var i=0;i<dots.length;i++){ color = {a:dots[i].a,b:dots[i].b,c:dots[i].c} var x = dots[i].x; var y = dots[i].y; var radius = 1; var frag = new Frag(that.x , that.y , radius , color , x-dx , y-dy); that.booms.push(frag); } }) } } function putValue(canvas , context , ele , dr , callback){ context.clearRect(0,0,canvas.width,canvas.height); var img = new Image(); if(ele.innerHTML.indexOf("img")>=0){ img.src = ele.getElementsByTagName("img")[0].src; imgload(img , function(){ context.drawImage(img , canvas.width/2 - img.width/2 , canvas.height/2 - img.width/2); dots = getimgData(canvas , context , dr); callback(dots); }) } else { var text = ele.innerHTML; context.save(); var fontSize =200; context.font = fontSize+"px 宋体 bold"; context.textAlign = "center"; context.textBaseline = "middle"; context.fillStyle = "rgba("+parseInt(getRandom(128,255))+","+parseInt(getRandom(128,255))+","+parseInt(getRandom(128,255))+" , 1)"; context.fillText(text , canvas.width/2 , canvas.height/2); context.restore(); dots = getimgData(canvas , context , dr); callback(dots); } } function imgload(img , callback){ if(img.complete){ callback.call(img); } else { img.onload = function(){ callback.call(this); } } } function getimgData(canvas , context , dr){ var imgData = context.getImageData(0,0,canvas.width , canvas.height); context.clearRect(0,0,canvas.width , canvas.height); var dots = []; for(var x=0;x<imgData.width;x+=dr){ for(var y=0;y<imgData.height;y+=dr){ var i = (y*imgData.width + x)*4; if(imgData.data[i+3] > 128){ var dot = {x:x , y:y , a:imgData.data[i] , b:imgData.data[i+1] , c:imgData.data[i+2]}; dots.push(dot); } } } return dots; } function getRandom(a , b){ return Math.random()*(b-a)+a; } var maxRadius = 1 , stars=[]; function drawBg(){ for(var i=0;i<100;i++){ var r = Math.random()*maxRadius; var x = Math.random()*canvas.width; var y = Math.random()*2*canvas.height - canvas.height; var star = new Star(x , y , r); stars.push(star); star.paint() } } var Star = function(x,y,r){ this.x = x;this.y=y;this.r=r; } Star.prototype = { paint:function(){ ctx.save(); ctx.beginPath(); ctx.arc(this.x , this.y , this.r , 0 , 2*Math.PI); ctx.fillStyle = "rgba(255,255,255,"+this.r+")"; ctx.fill(); ctx.restore(); } } var focallength = 250; var Frag = function(centerX , centerY , radius , color ,tx , ty){ this.tx = tx; this.ty = ty; this.x = centerX; this.y = centerY; this.dead = false; this.centerX = centerX; this.centerY = centerY; this.radius = radius; this.color = color; } Frag.prototype = { paint:function(){ ctx.save(); ctx.beginPath(); ctx.arc(this.x , this.y , this.radius , 0 , 2*Math.PI); ctx.fillStyle = "rgba("+this.color.a+","+this.color.b+","+this.color.c+",1)"; ctx.fill() ctx.restore(); }, moveTo:function(index){ this.ty = this.ty+0.3; var dx = this.tx - this.x , dy = this.ty - this.y; this.x = Math.abs(dx)<0.1 ? this.tx : (this.x+dx*0.1); this.y = Math.abs(dy)<0.1 ? this.ty : (this.y+dy*0.1); if(dx===0 && Math.abs(dy)<=80){ this.dead = true; } this.paint(); } } </script></body></html>- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63
- 64
- 65
- 66
- 67
- 68
- 69
- 70
- 71
- 72
- 73
- 74
- 75
- 76
- 77
- 78
- 79
- 80
- 81
- 82
- 83
- 84
- 85
- 86
- 87
- 88
- 89
- 90
- 91
- 92
- 93
- 94
- 95
- 96
- 97
- 98
- 99
- 100
- 101
- 102
- 103
- 104
- 105
- 106
- 107
- 108
- 109
- 110
- 111
- 112
- 113
- 114
- 115
- 116
- 117
- 118
- 119
- 120
- 121
- 122
- 123
- 124
- 125
- 126
- 127
- 128
- 129
- 130
- 131
- 132
- 133
- 134
- 135
- 136
- 137
- 138
- 139
- 140
- 141
- 142
- 143
- 144
- 145
- 146
- 147
- 148
- 149
- 150
- 151
- 152
- 153
- 154
- 155
- 156
- 157
- 158
- 159
- 160
- 161
- 162
- 163
- 164
- 165
- 166
- 167
- 168
- 169
- 170
- 171
- 172
- 173
- 174
- 175
- 176
- 177
- 178
- 179
- 180
- 181
- 182
- 183
- 184
- 185
- 186
- 187
- 188
- 189
- 190
- 191
- 192
- 193
- 194
- 195
- 196
- 197
- 198
- 199
- 200
- 201
- 202
- 203
- 204
- 205
- 206
- 207
- 208
- 209
- 210
- 211
- 212
- 213
- 214
- 215
- 216
- 217
- 218
- 219
- 220
- 221
- 222
- 223
- 224
- 225
- 226
- 227
- 228
- 229
- 230
- 231
- 232
- 233
- 234
- 235
- 236
- 237
- 238
- 239
- 240
- 241
- 242
- 243
- 244
- 245
- 246
- 247
- 248
- 249
- 250
- 251
- 252
- 253
- 254
- 255
- 256
- 257
- 258
- 259
- 260
- 261
- 262
- 263
- 264
- 265
- 266
- 267
- 268
- 269
- 270
- 271
- 272
- 273
- 274
- 275
- 276
- 277
- 278
- 279
- 280
- 281
- 282
- 283
- 284
- 285
- 286
- 287
- 288
- 289
- 290
- 291
- 292
- 293
- 294
- 295
- 296
- 297
- 298
- 299
- 300
- 301
- 302
- 303
- 304
- 305
- 306
- 307
- 308
- 309
- 310
- 311
- 312
- 313
- 314
- 315
- 316
- 317
- 318
- 319
- 320
- 321
- 322
- 323
- 324
- 325
- 326
- 327
- 328
- 329
- 330
- 331
- 332
- 333
- 334
- 335
- 336
- 337
- 338
- 339
- 340
- 341
- 342
- 343
- 344
- 345
- 346
- 347
- 348
- 349
- 350
- 351
- 352
- 353
- 354
- 355
- 356
- 357
- 358
- 359
- 360
新建文件夹img把以下两张图片放进去
city.png
moon.png