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

void RenderScene(void) {
	glClear(GL_COLOR_BUFFER_BIT);
	glColor3f(1.0f, 0.0f, 0.0f);
	//dziewiecokat
	glBegin(GL_TRIANGLE_FAN);
	glVertex2f(0.0, 0.0);
	glVertex2f(-25.0, -25.0);
	glVertex2f(25.0, -25.0);

	glVertex2f(0.0, 0.0);
	glVertex2f(-25.0, -25.0);
	glVertex2f(-27.5, -12.5);
	glEnd();

	glFlush();
}

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

void ChangeSize(int w, int h) {
	GLfloat aspectRatio;
	if (h == 0)   h = 1;
	glViewport(0, 0, w, h);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	aspectRatio = (GLfloat)w / (GLfloat)h;
	if (w <= h)    glOrtho(-100.0, 100.0, -100 / 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();
}

int main(int argc, char* argv[]) {
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
	glutInitWindowSize(800, 600);
	glutCreateWindow("GLRect");
	glutDisplayFunc(RenderScene);
	glutReshapeFunc(ChangeSize);
	SetupRC();
	glutMainLoop();
	return 0;
}