圖形學試驗-填充多邊形算法

#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); /*畫點*/

    /*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();

}