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();
}