雨滴.c

C语言实现雨滴模拟

#include "stdio.h"
#include "graphics.h"
#define LEN sizeof(struct rainDrop)
struct rainDrop
{
	int startX;
	int startY;
       int endY;
	int curX;
	int curY;
	int color;
	int step;
      int length;
};

struct rainDrop *creatDrop(void)
{
	struct rainDrop *p;
	p=(struct rainDrop *)malloc(LEN);
	p->startX=rand()%640;
	p->startY=rand()%430;
      p->endY=430+rand()%50;

	p->curX=p->startX;
	p->curY=p->startY;
	p->step=8;
	p->color=rand()%15+1;
      p->length=rand()%10+10; 
	return(p);
}
void recreatDrop(struct rainDrop *p)
{
	p->startX=rand()%640;
	p->startY=rand()%430;
	p->endY=430+rand()%50;
	p->curX=p->startX;
	p->curY=p->startY;
	p->step=8;
	p->color=rand()%15+1;
	p->length=rand()%10+10;
}


void initgraphics()
{
    int gmode,gdriver;
    gdriver=DETECT;
    initgraph(&gdriver,&gmode,"");
}
void drawLine(struct rainDrop *p){
	       setcolor(p->color);
		line(p->startX,p->startY,p->curX,p->curY);
	}
void clearLine(struct rainDrop *p){
	       setcolor(BLACK);
		line(p->startX,p->startY,p->curX,p->curY);
	}
void updateLine(struct rainDrop *p){
	       
              if(p->step%5==0)
		p->step++;
	      
              p->curY+=p->step;
	        p->startY=p->curY-p->length;
		 
	}
void clearAll()
{       
    closegraph();
}
void rainDropDown(struct rainDrop *p){
	            clearLine(p);
		     updateLine(p);
		     drawLine(p);
			     
	}
main()
{
    int i;    
    
    struct rainDrop *p1=creatDrop();
    
    initgraphics(); 
       while(!kbhit()){              
		      rainDropDown(p1);
                     
                   
                  delay(5000);
                  if(p1->curY>p1->endY){
                      clearLine(p1);
                      recreatDrop(p1);
                  
                  }
	}    
		     
	         
	        
		    
     
    getch();
    clearAll();

}