/*
 * GLUT Shapes Demo
 *
 * Written by Nigel Stewart November 2003
 *
 * This program is test harness for the sphere, cone
 * and torus shapes in GLUT.
 *
 * Spinning wireframe and smooth shaded shapes are
 * displayed until the ESC or q key is pressed.  The
 * number of geometry stacks and slices can be adjusted
 * using the + and - keys.
 */

#ifdef __APPLE__
#include <GLUT/glut.h>
#else
#include <GL/glut.h>
#endif

#include <stdlib.h>

GLfloat angle = 0.0f;

void initGL()
{
   glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
}

void idle() {
    glutPostRedisplay();
}

void display() {
    glClear(GL_COLOR_BUFFER_BIT);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();

    glPushMatrix();
    glTranslatef(0.0f, 0.0f, 0.0f);
    glRotatef(angle, 1.0f, 1.0f, 0.0f);

    glBegin(GL_QUADS);
        glColor3ub(0, 255, 0);
        glVertex2f(-0.3f, -0.3f);
        glVertex2f(0.3f, -0.3f);
        glVertex2f(0.3f, 0.3f);
        glVertex2f(-0.3f, 0.3f);
    glEnd();
    glPopMatrix();



    glutSwapBuffers();
    //glFlush();
    angle += 0.5f;

}

void reshape(GLsizei width, GLsizei height = 1)
{
    if (height == 0) height = 1;
    GLfloat aspect = (GLfloat)width / (GLfloat)height;

    glViewport(0,0, width, height);

    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    if(width >= height)
    {
        gluOrtho2D(-1.0 * aspect,
                    1.0 * aspect,
                    -1.0, 1.0);
    }
}


int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE);
    glutCreateWindow("Zadanie 4.1");
    glutInitWindowSize(600,600);
    glutInitWindowPosition(300,300);
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutIdleFunc(idle);
    initGL();
    glutMainLoop();

    return EXIT_SUCCESS;
}