Computer-Graphics-Algorithms-Cpp/04_Implementation_of_mid-point_circle_generating_Algorithm.cpp at main · Ronit049/Computer-Graphics-Algorithms-Cpp · GitHub

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#include <iostream>
#include <graphics.h>
using namespace std;

// Function to plot 8 symmetric points
void plotCirclePoints(int xc, int yc, int x, int y)
{
    putpixel(xc + x, yc + y, WHITE);
    putpixel(xc - x, yc + y, WHITE);
    putpixel(xc + x, yc - y, WHITE);
    putpixel(xc - x, yc - y, WHITE);

    putpixel(xc + y, yc + x, WHITE);
    putpixel(xc - y, yc + x, WHITE);
    putpixel(xc + y, yc - x, WHITE);
    putpixel(xc - y, yc - x, WHITE);
}

// Midpoint Circle Algorithm
void midpointCircle(int xc, int yc, int r)
{
    int x = 0;
    int y = r;

    int p = 1 - r;

    while (x <= y)
    {
        // Plot 8 symmetric points
        plotCirclePoints(xc, yc, x, y);

        x++;

        if (p < 0)
        {
            p = p + 2 * x + 1;
        }
        else
        {
            y--;
            p = p + 2 * x - 2 * y + 1;
        }
    }
}

int main()
{
    int gd = DETECT, gm;

    initgraph(&gd, &gm, "");

    int xc, yc, r;

    cout << "Enter center coordinates (xc yc): ";
    cin >> xc >> yc;

    cout << "Enter radius: ";
    cin >> r;

    midpointCircle(xc, yc, r);

    getch();
    closegraph();

    return 0;
}