#include <stdio.h>
#include <stdlib.h>

#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>

void drawPixel(int x, int y, int r, int g, int b);
void render(void);

int main(int argc, char** argv){
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_SINGLE);
    glutInitWindowSize(600, 400);
    glutInitWindowPosition(100, 100);
    glutCreateWindow("Game");
    glutDisplayFunc(render);
    glutMainLoop();

return 0;
}

void render(void) {
        glClearColor(0.12, 0.12, 0.13, 0.1);
        glClear(GL_COLOR_BUFFER_BIT);
        glFlush();

        int x = 0; int y = 0;

        /*
        do{
                drawPixel(x, y, 255, 35, 32);
                x++;

                if(x == 800) { x = 0; y++; glFlush();}
            }while(y != 640);
            */

        drawPixel(20, 400, 0, 255, 255);


        glFlush();
    }

void drawPixel(int x, int y, int r, int g, int b) {

    float fr, fg, fb;


    fr = (float) r / 255.0;
    fg = (float) g / 255.0;
    fb = (float) b / 255.0;

    glColor3f(fr, fg, fb);
    glBegin(GL_POINTS);

    float xf = 0;
    float yf = 0;

    if(x < 400){
        xf = -0.999 + (float)x / 400;
    }else{
        xf = (float)x / 800;
    }
    if(y < 300){
        yf = 0.999 - (float) y / 300;
    }else{
        yf = - (float) y / 600;
    }

    if(x == 0){ xf = -0.99;}
    if(y == 0){ yf = 0.99;}

    glVertex2f(xf, yf);
    glEnd();
}