图形学试验-填充多边形算法

#include "Conio.h"
#include "graphics.h"
#define closegr closegraph
void initgr(void)
{
  int gd=DETECT,gm=0;
  initgraph(&gd,&gm,"");
}

void seedfilling(x,y,fill_color,boundary_color)
int x,y,fill_color,boundary_color;
{
 int c;
 c=getpixel(x,y);
 if((c!=boundary_color)&&(c!=fill_color)) 
 {
  putpixel(x, y, fill_color); /*画点*/
  /*getch(); */
 
   seedfilling(x+1,y, fill_color, boundary_color); 

   seedfilling(x-1,y, fill_color, boundary_color);

   seedfilling(x, y+1, fill_color, boundary_color);

   seedfilling(x, y-1, fill_color, boundary_color);

  }
}

 

void main()
{
 int a,b,color;
 int gd=DETECT , gm;
 int poly[10];
 a=150  ;
 b=140;
 color=9;
 initgraph(&gd , &gm , "");

 poly[0] = 110;       
 poly[1] = 110;

 poly[2] = 200;     
 poly[3] = 105;

 poly[4] = 170;    
 poly[5] = 120;

 poly[6]=150;       
 poly[7]=170;

 poly[8]=110;     
 poly[9]=110;

 printf("Enter fill_color: ");
 scanf("%d",&color);
 while(color>=15)
 {
    printf("Enter error ! please reinput color !\n");
    printf("Enter fill_color: ");
    scanf("%d",&color);
 }

 printf("Enter a and b: ");
 scanf("%d%d",&a,&b);

 while(a>155 || a<145)
 {
    printf("Out range ! please reinput a between 145-155 !\n");
    printf("Enter a: ");
    scanf("%d",&a);
 }
 while(b>155 || b<120)
 {
    printf("Out range ! please reinput b between 120-155 !\n");
    printf("Enter b: ");
    scanf("%d",&b);
 }
 drawpoly(5,poly);

 seedfilling(a,b,color,15); 

 getch();
 closegraph();
}