核心提示：我们可以直接用Flash的ASAS代码生成风吹云飘，风吹着青草左右摇摆的动画，Flash AS动画实例：风吹云飘草动，因为AS的运算会拖慢机器，所以这里就不提供效果演示了，这里我绘制了一个放草的框框，按Ctrl+L打开库分别把草元件和云元件放到相应的图层，给大家截个图， 制作方法如下

我们可以直接用Flash的ASAS代码生成风吹云飘，风吹着青草左右摇摆的动画。因为AS的运算会拖慢机器，所以这里就不提供效果演示了，给大家截个图。

　　制作方法如下。

　　首先建立两个空的影片剪辑cloud和grass。

　　先建立云的影片剪辑（里面什么都不画）

　　选择该元件的第一帧，添加如下代码。

//Number of clouds clouds=6; //These are just general boundaries. //To use exact boundaries, create a mask in the parent level of the size desired //Height of the sky skyheight=Stage.height; //Width of the sky skywidth=Stage.width; //Max size of a cloud cloudsize=300; //Amount of blur applied to the shapes to make them cloud-like blursize=40; //Clouds move at a random speed. this is the minimum speed cloudminspeed=.5; //Variance in speed from cloud to cloud cloudspeedvariance=1; //Create the clouds for(c=1;c<=clouds;c++){ //create an empty movie clip to hold the cloud  this.createEmptyMovieClip("cloud"+c,this.getNextHighestDepth()); //generate a cloud. Pass in the instance name of the newly created cloud  shapecloud("cloud"+c); //Set the x position to a random position within the boundaries  eval("cloud"+c)._x=Math.random()*skywidth-eval("cloud"+c)._x/2; //Set the y position to a random position within the boundaries  eval("cloud"+c)._y=Math.random()*(skyheight)-eval("cloud"+c)._height; } //Run at the start of each frame onEnterFrame=function(){ //Run for each cloud  for(c=1;c<=clouds;c++){ //Move the cloud to the left according to its speed 　eval("cloud"+c)._x-=eval("cloud"+c).cloudspeed; //If the cloud is past the stage to the left, reset it to the right. Create a new shape and color　 　if(eval("cloud"+c)._x+(eval("cloud"+c)._width/2)+cloudsize<0){ //Reset the x position 　 eval("cloud"+c)._x=skywidth; //Reshape and recolor the cloud 　 shapecloud("cloud"+c); 　}  } } //This function creates the shape and color of a cloud function shapecloud(cloudid){ //Clear the current contents of the cloud  eval(cloudid).clear(); //Set the new shade between 224 and 255. This number is used for the red, green, and blue, to create a grayscale color  cloudcolor=Math.round(Math.random()*31)+224; //Use no line  eval(cloudid).lineStyle(undefined, (cloudcolor+cloudcolor*0x100+cloudcolor*0x10000), 100, false, "none", "none", "none", 1); //Set the fill color. cloudcolor is used 3 times, for red, green, and blue  eval(cloudid).beginFill((cloudcolor+cloudcolor*0x100+cloudcolor*0x10000)); //Set a starting coordinate for the cloud   eval(cloudid).moveTo(Math.random()*cloudsize,Math.random()*cloudsize); //Draw an invisible line to another point the combined lines form shapes, which are the clouds. //They don't look much like clouds until the blur is applied  eval(cloudid).lineTo(Math.random()*cloudsize,Math.random()*cloudsize);  eval(cloudid).lineTo(Math.random()*cloudsize,Math.random()*cloudsize);  eval(cloudid).lineTo(Math.random()*cloudsize,Math.random()*cloudsize);  eval(cloudid).lineTo(Math.random()*cloudsize,Math.random()*cloudsize);  eval(cloudid).lineTo(Math.random()*cloudsize,Math.random()*cloudsize); //Apply a blur to the shape  eval(cloudid).filters = [new flash.filters.BlurFilter(blursize,blursize,2)]; //Set a new cloud speed  eval(cloudid).cloudspeed=Math.random()*cloudspeedvariance+cloudminspeed;  }

　　同样办法再新建立一个草的影片剪辑

选择第一帧添加如下代码。

//Height of each blade of grass grassheight=35; //Average space in between each blade of grass grassspacing=5; //Maximum sway of each blade of grass maxsway=20; //Number of blades of grass along the x axis xplots=30; //Number of blades of grass along the y axis yplots=20; //The wind has an x position and the grass is attracted to the position windxpos=0; //Velocity of the wind left and right windspeed=0; //Gives the grass a bent effect. The grass bends 1/4 of the way up grasscontrol=grassheight/4; //Array containing the info for each blade of grass grasscoords=[]; //These loops go through the field, planting each blade of grass for (xpos=0; xpos for (ypos=0; ypos　//x position, y position, sway, and color 　grasscoords.push([xpos*grassspacing+Math.random()*grassspacing,ypos*grassspacing+Math.random()*grassspacing,0,Math.round(Math.random()*128)*65536+Math.round(Math.random()*76+146)*256]);  } } //Run on each frame onEnterFrame=function(){ //Clear all of the grass so it can be redrawn with different sway  this.clear(); //Change the speed of the wind  windspeed=Math.max(-50,Math.min(50,windspeed+Math.random()*40-20)); //Move the position the blades are attracted according to the windxpos  windxpos+=windspeed; //If the windxpos moves too far to the left, reverse its speed  if(windxpos<-100){ 　windxpos=-100; 　windspeed*=-1;  } //If the windxpos moves too far to the right, reverse its speed  else if(windxpos>grassspacing*xplots+100){ 　windxpos=grassspacing*xplots+100; 　windspeed*=-1;  } //handle the redraw for each blade of grass  for(coord=0;coord//Set the line style. 0 means use hairline width and grasscoords[coord][3] is the color 　 　this.lineStyle(0, grasscoords[coord][3], 100, false, "normal", "none", "none", 1); //Adjust the sway according to the grass's current sway and the windxpos 　grasscoords[coord][2]=Math.max(-maxsway,Math.min(maxsway,grasscoords[coord][2]+Math.max(-maxsway,Math.min(maxsway,(windxpos-grasscoords[coord][0])/100))))+(Math.random()*3-1.5); //Move to the base of the blade of grass 　this.moveTo(grasscoords[coord][0],grasscoords[coord][1]); //Draw a curved line to the new top of the blade of grass 　this.curveTo(grasscoords[coord][0],grasscoords[coord][1]-grasscontrol,grasscoords[coord][0]+grasscoords[coord][2],grasscoords[coord][1]-grassheight+Math.abs(grasscoords[coord][2]/2));  } }

然后回到主场景中，建立两个图层，下面的为云的图层，上面的为草的图层，这里我绘制了一个放草的框框。

按Ctrl+L打开库分别把草元件和云元件放到相应的图层。给草命名实例grass。

最后可以测试影片了！但是好象机器运行速度在减慢啊！祝你好运！