Boundaryfill Polygon Filling

Program : Boundaryfill Polygon Filling

#include<stdio.h>

#include<conio.h>

#include<math.h> //header file inclusion

#include<graphics.h>

void main() //main function

{

int gdriver=DETECT,gmode,errorcode;

int x,y,i,r;

int xc,yc,t; //variable initializations

clrscr();

initgraph(&gdriver,&gmode,"D:\\TC\\BGI"); //initializing graphics window

printf("\nEnter the co-ordinates of the centre of the circle(xc,yc): \n");

scanf("%d%d",&xc,&yc); //Inputting center coordinates

printf("\nEnter the radius of the circle ,r:");

scanf("%d",&r); //Inputting circle radius

for(i=0;i<360;i++)

{

x=r*cos(i); //polar conversion

y=r*sin(i);

circleplot(xc,yc,x,y); //calling circleplot() function

}

boundaryfill4(xc,yc,1,12); //calling boundaryfill4() function

getch();

}

circleplot(int xa,int ya,int x,int y) //function to plot circle

{

putpixel((xa+x),(ya+y),12); //plotting the point

return(0);

}

boundaryfill4(int x,int y,int fillcolor,int bdycolor) //function for filling polygon

{

int ct=getpixel(x,y); //get pixel color

if((ct!=bdycolor)&&(ct!=fillcolor)) //if not already filled

{

putpixel(x,y,fillcolor); //plotting the point

boundaryfill4(x+1,y,fillcolor,bdycolor);

boundaryfill4(x-1,y,fillcolor,bdycolor);

boundaryfill4(x,y+1,fillcolor,bdycolor); //filling neighboring pixels

boundaryfill4(x,y-1,fillcolor,bdycolor);

}

return(0);

}