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 2007-08-27 02:06浏览: 2685 次

Flash 8制作烟花粒子的特效代码

我这个Flash烟花粒子特效的制作其实很简单。

  第一步:在Flash中建立画布550*400(宽度随便设的,高度应在200以上,因为烟花显示的高度是200,这个也可以在代码里修改,代码第六行 var rect:Rectangle = new Rectangle(0, 0, Stage.width, 200); 这个200就是高度)

  第二步:在空白帧上点右键-动作 输入以下Action script代码。

Stage.scaleMode = "noScale";

import flash.display.BitmapData;

import flash.filters.ConvolutionFilter;

import flash.geom.Rectangle;

var con = new ConvolutionFilter(3, 3, [1, 1, 1, 1, 30, 1, 1, 1, 1], 38);

var rect:Rectangle = new Rectangle(0, 0, Stage.width, 200);

var bitmap1 = new BitmapData(rect.width, rect.height, false,0x00000000);

var bitmap2 = new BitmapData(rect.width, rect.height, true,0x00000000);

var bitmapShow1 = createEmptyMovieClip("bitmapShow1", 1).attachBitmap(bitmap1, 1);

//粒子的显示画布

var bitmapShow2 = createEmptyMovieClip("bitmapShow2", 2).attachBitmap(bitmap2, 2);

//白色闪光点的显示画布

var m_mouseX;//鼠标x坐标

var m_mouseY;//鼠标y坐标

var sound1 = new Sound();

//上升过程的声音

var sound2 = new Sound();//爆炸声音

var bit_px = new Array(bits);//爆炸过程的x坐标

var bit_py = new Array(bits);//爆炸过程的y坐标

var bit_vx = new Array(bits);//爆炸过程的x速度

var bit_vy = new Array(bits);//爆炸过程的y速度

var bit_sx = new Array(bits);//上升过程的x坐标

var bit_sy = new Array(bits);//上升过程的y坐标

var bit_l = new Array(bits);//粒子的生命时间

var bit_f = new Array(bits);//是上升还是爆炸的标志

var bit_p = new Array(bits);//随机出现白色闪光点的标志

var bit_c = new Array(bits);//粒子颜色

init();

function init() {

 sound1.attachSound("sound1");

 sound2.attachSound("sound2");

 bits = 500;//总的最大粒子数

 bit_max = 50;//一次出现的粒子数

 bit_sound = 2;

 for (var j = 0; j

  bit_f[j] = 0;

 }

}

onEnterFrame = function () {

 bitmap2.fillRect(new Rectangle(0, 0, rect.width, rect.height), 0x00000000);

//白色闪光点清除

//bitmap2.applyFilter(bitmap, bitmap.rectangle, new Point(0, 0), con);

 rend();

 bitmap1.applyFilter(bitmap1, bitmap1.rectangle, new Point(0, 0), con);

//模糊滤镜

};

onMouseDown = function () {

 m_mouseX = _root._xmouse;

 m_mouseY = _root._ymouse;

 if (rect.contains(m_mouseX, m_mouseY)) {

  var k = int(Math.random()*256);

  var l = int(Math.random()*256);

  var i1 = int(Math.random()*256);

  var j1 = k << 16 | l << 8 | i1;

  var k1 = 0;

  for (var l1 = 0; l1

   if (bit_f[l1] != 0) {

   continue;

  }

 bit_px[l1] = m_mouseX;

 bit_py[l1] = m_mouseY;

 var d = Math.random()*6.28;

 var d1 = Math.random();

 bit_vx[l1] = Math.sin(d)*d1/2;

 bit_vy[l1] = Math.cos(d)*d1/2;

 bit_l[l1] = int(Math.random()*100)+100;

 bit_p[l1] = int(Math.random()*3);

 if (random(4) == 0) {

  bit_c[l1] = 0xFFFFFF;

 } else {

  bit_c[l1] = j1;

 }

 bit_sx[l1] = m_mouseX;

 bit_sy[l1] = rect.height-5;

 bit_f[l1] = 2;

 if (++k1 == bit_max) {

  break;

 }

}

sound1.start(0);

}

};

function rend() {

 var flag:Boolean = false;

 var flag1:Boolean = false;

 var flag2:Boolean = false;

  for (var k = 0; k

   switch (bit_f[k]) {

   case 1 : // 爆炸过程

    bit_vy[k] += Math.random()/100;

    bit_px[k] += bit_vx[k];

    bit_py[k] += bit_vy[k];

    bit_l[k]--;

    if (bit_l[k] == 0 || !rect.contains(bit_px[k], bit_py[k])) {

     bit_c[k] = 0x000000;

     bit_f[k] = 0;

    } else if (bit_p[k] == 0) {

     if (int(Math.random()*2) == 0) {

      bit_setwhite(int(bit_px[k]), int(bit_py[k]), 0xFFFFFFFF);

     }

     bit_set(int(bit_px[k]), int(bit_py[k]), int(bit_c[k]));

    } else {

     bit_set(int(bit_px[k]), int(bit_py[k]), int(bit_c[k]));

    }

    break;

   case 2 :  // 上升过程

    bit_sy[k] -= 5;

    if (bit_sy[k]<=bit_py[k]) {

     bit_f[k] = 1;

     flag2 = true;

    }

    if (int(Math.random()*20) == 0) {

     var i = int(Math.random()*2);

     var j = int(Math.random()*5);

     bit_set(bit_sx[k]+i, bit_sy[k]+j, 0xFFFFFF);

    }

    break;

   }

  }

  if (flag2) {

   sound2.start(0);

  }

 }

 function bit_set(i:Number, j:Number, k:Number) {

 bitmap1.setPixel(i, j, k);

}

function bit_setwhite(i:Number, j:Number, k:Number) {

 bitmap2.setPixel32(i, j, k);//白色闪光点

}

  最后测试影片。

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