#include "SDL/SDL.h"
#include "SDL/SDL_opengl.h"

int main(int argc, char **argv)
{
	if ( SDL_Init(SDL_INIT_VIDEO) != 0 )
	{
		printf("Unable to initialize SDL: %s\n", SDL_GetError());
		return 1;
	}

	SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );

	SDL_Surface* screen = SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL);

	if (screen == NULL)
	{
		printf("SDL_SetVideoMode() returned NULL: %s\n", SDL_GetError());
		return 1;
	}

	glViewport( 0, 0, screen->w, screen->h );
	glClearColor( 0.0f, 0.0f, 0.0f, 0.0f ); //taustaväri
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	glFrustum(-0.5f * screen->w / screen->h, 0.5f * screen->w / screen->h, 0.5f, -0.5f, 1.0f, 500000.0f);
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();

	glColor3i(0, 255, 0);
	glBegin(GL_TRIANGLES);
		glVertex3f(1.0f, 1.0f, 5.0f);
		glVertex3f(0.5f, 1.5f, 5.0f);
		glVertex3f(1.5f, 1.5f, 5.0f);
	glEnd();

	SDL_Delay(5000);
	SDL_Quit();
	return 0;
}