1-BresenhamLineDrawingAlgo.cpp

#include <windows.h>
#include <gl/glut.h>
#include <iostream>
#include "./openGL-comp/HelperDrawerMethod.h"
#include "./algos/1-BresenhamLineAlgo.h"

using namespace std;

void myInit()
{
    glClearColor(1.0, 1.0, 1.0, 1.0);
    glClear(GL_COLOR_BUFFER_BIT);
    gluOrtho2D(0, 500.0, 0, 500.0);
}

void draw_line(int x0, int x1, int y0, int y1)
{
    int dX = abs(x1 - x0), dY = abs(y1 - y0);
    int offsetX = 250, offsetY = 250; // origin at (250,250)
    RGBColor color(0, 0, 0, 1);
    bool exchangeCord = true;

    if (dX > dY)
    {
        exchangeCord = false;
    }
    drawPixels(BresenhamsLineDrawingAlgo(y0, y1, x0, x1), color, offsetX, offsetY, exchangeCord);
}

int x1, x2, uy1, y2;
void myDisplay()
{
    draw_line(x1, x2, uy1, y2);
    glFlush();
}

int main(int argc, char **argv)
{
    cout << "Enter (x1, uy1, x2, y2)\n";
    cin >> x1 >> uy1 >> x2 >> y2;
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
    glutInitWindowSize(500, 500);
    glutInitWindowPosition(0, 0);
    glutCreateWindow("- Bresenham's Line Drawing -");
    myInit();
    glutDisplayFunc(myDisplay);
    glutMainLoop();

    return 0;
}