dotsix.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;


//此式样是直线向前的式样
public class DotSix extends Dot{

	public  DotSix(Color col,int endX,int endY){
          super( col,endX, endY);
		 
		  pace=20;
	} 
	
	public LittleDot[] blast() {
		int j=-1;
		for(int i=0;i<ld.length;i++){
			j=-j;
			ld[i].x+=(ld[i].x-endPoint.x)/4+j;
			ld[i].y+=(ld[i].y-endPoint.y)/4+1;
		}
		
		return ld;
	}

	public LittleDot[] initBlast() {
		//初始化粒子
		//只要分成20
	    //初始化爆炸的情况

	      Random   rand=new Random();
	      
	  for(int i=0;i<ld.length;i++){
	    	  int x=rand.nextInt(20);
	    	  int y=rand.nextInt(20);
	    	  
	    	  if(Math.random()<0.5){
	    		x=-x;  
	    	  }
	    	  
	    	  if(Math.random()<0.5){
		    		y=-y;  
		    	  }
	    	  
	    	  if(x*x+y*y>400){
	    		x-=x/Math.abs(x)*10; 
	    		y-=y/Math.abs(y)*10; 
	    	  }
	    	 
	    	  ld[i]=new LittleDot(x+endPoint.x,y+endPoint.y,col);
	      }
	    
	    return ld;
	}

	
	
	public    void  myPaint(Graphics g,Vector lList){
	     if(state==1){
		    g.setColor(col);
			g.fillOval(x,y,size,size);
			g.fillRect(x+2,y+6,2,4);
			     }

			else   if(state==2){
				
			    g.setColor(col);
			    
				g.fillOval(x,y,size,size);
			
	        	LittleDot[] ld2=initBlast();
	        	ld=new  LittleDot[ld2.length];
	         	ld=ld2;
	 
	  		     for(int i=0;i<ld.length;i++){
	        	      g.setColor(ld[i].col);
			    	  g.drawLine(ld[i].x,ld[i].y,ld[i].x+(ld[i].x-endPoint.x)/2,
			    			  ld[i].y+(ld[i].y-endPoint.y)/2);
			         } 
	  		 
			   state=3;
			}

	        else  if(state==3){
	     	
				circle++;
			//System.out.println(dot.circle);
				
				 this.ld=blast();
			    
	           for(int i=0;i<ld.length;i++){
	        	   
			      g.setColor(ld[i].col);
			      g.drawLine(ld[i].x,ld[i].y,ld[i].x+(ld[i].x-endPoint.x)/circle,
			    		  ld[i].y+(ld[i].y-endPoint.y)/circle);
			   } //for
	           if(circle==4){circle=7;}
			}

			else if(state==4){
				synchronized(lList){
			   lList.remove(this);}
			}
	}
	
}