dotthree.java

用JAVA写个一个烟花效果

package FireFlower;
import java.awt.Color;
import java.awt.Graphics;
import java.util.Random;
import java.util.Vector;

//此式样是随机的式样
class  DotThree  extends Dot{
	

   public DotThree(Color col,int endX,int endY){
	  super(col, endX, endY);
	  pace=20;
	  
   }

   


   public LittleDot[] initBlast(){
      //初始化爆炸的情况

	final  int  ONE=20;//这是爆炸的第一圈的半径 
      Random   rand=new Random();
      int  blastX=endPoint.x-ONE*circle;
	  int  blastY=endPoint.y-ONE*circle;
	  
	  if(Math.random()<0.3){
	  for(int i=0;i<ld.length;i++){
	      ld[i]=new LittleDot(rand.nextInt(ONE*circle*2+20)+blastX,
	    		              rand.nextInt(ONE*circle*2+20)+blastY,
			  new Color(rand.nextInt(256),rand.nextInt(256),rand.nextInt(256)));
	    		             
	  }//for
  
	  }//if
	  
	  else  {
		  for(int i=0;i<ld.length;i++){
		      ld[i]=new LittleDot(rand.nextInt(ONE*circle*2)+blastX,
		    		              rand.nextInt(ONE*circle*2)+blastY,
				                     col);
		    		             
		  }//for
		  
	  }//else
	  
	  col=new Color(225,203,114);
	  size=10;
     state=3;
    return ld; 

   }


   public  LittleDot[]   blast(){
	   //处理爆炸的情况
       final  int  EVERY=40;//爆炸的每圈的半径 
       
       if(circle>=4) state=4 ;
       
      Random   rand=new Random();
	  for(int i=0;i<ld.length;i++){
			      ld[i].x+=rand.nextInt(EVERY)-EVERY/2;
				  ld[i].y+=rand.nextInt(EVERY)-EVERY/2;
	
		  }
	
	  return ld;
   }

   public void myPaint(Graphics g,Vector lList){
	 
	   super.myPaint(g,lList);
	   /*
	   if(circle<=3){
			g.setColor(col);
	      	g.fillOval(x,y+circle*2,size,size);
		   }
		   */
	   }
  
}