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

#include <GL/freeglut.h>
int  ilosc;
void wytnij(float x)
{

			glColor3f(0.0f, 0.0f, 0.0f);
			glVertex2f(x/3, x/3);
			glVertex2f(x/3, -x/3);
			glVertex2f(-x/3, -x/3);
			glVertex2f(-x/3, x/3);


}
void rys(float x)
{
glColor3f(1.0f, 0.0f, 0.0f);
glVertex2f(x, x);
glColor3f(0.0f, 1.0f, 0.0f);
glVertex2f(x, -x);
glColor3f(0.0f, 0.0f, 1.0f);
glVertex2f(-x, -x);
glColor3f(1.0f, 1.0f, 0.0f);
glVertex2f(-x, x);


}

void DrawScene(void);

void InitOpenGL(void);

void ReshapeWindow(int width, int height);

int mainWindow;
using namespace std;
int main(int argc, char **argv)
{
	cout<< "Podaj Ilosc kwadratow"<<endl;
	cin>> ilosc;

	glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);
    glutInitWindowSize(1000	,1000);
	glutInitWindowPosition(150,150);
    mainWindow = glutCreateWindow("Pierwsze Laboratorium");

	if(mainWindow == 0){
		puts("Nie mozna stworzyc okna!!!\nWyjscie z programu.\n");
		exit(-1);
	}

	glutSetWindow(mainWindow);

	glutDisplayFunc(DrawScene);
	glutReshapeFunc(ReshapeWindow);


	InitOpenGL();

	glutMainLoop();

	return(0);
}

void DrawScene(void)
{


glBegin(GL_QUADS);
float x=90;
rys(x);
wytnij(x);
float po=2*x/3;
    float s=2*x/9;
   for(int t =0; t<ilosc; t++)
    {
        for(double i=0; i<2*x; i=i+3*s)
        {
            for(double j=0; j<2*x; j=j+3*s)
            {
 				glColor3f(0.0f, 0.0f, 0.0f);
                glVertex2f(-x+po/3+i, -x+po/3+j);

                glVertex2f(-x+po/3+i, -x+po/3+s+j);

                glVertex2f(-x+po/3+s+i, -x+po/3+s+j);

                glVertex2f(-x+po/3+s+i, -x+po/3+j);
            }
        }
        s/=3;
        po/=3;
    }
glEnd();
glFlush();
}

void InitOpenGL(void)
{

	glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
}

void ReshapeWindow(int width, int height)
{
	int aspectRatio;
	if(height == 0) height = 1;
	aspectRatio = width / height;
	glViewport(0, 0, width, height);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    if(width <= height)
		glOrtho(-100.0, 100.0, -100.0/aspectRatio, 100.0/aspectRatio, 1.0, -1.0);
     else
		glOrtho(-100.0*aspectRatio, 100.0*aspectRatio, -100.0, 100.0, 1.0, -1.0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();

}