bool init(){
	/*** Initialize SDL, Create the window, and initialize OpenGL. ***/
	if( SDL_Init(SDL_INIT_EVERYTHING) < 0 )
		return false;
	
	if( SDL_SetVideoMode(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP, SDL_OPENGL|SDL_RESIZABLE|SDL_GL_DOUBLEBUFFER) == NULL)
		return false;
	
	if( initGL() == false)
		return false;
		
	SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
	resizeWindow(SCREEN_WIDTH, SCREEN_HEIGHT);
	SDL_WM_SetCaption("ETGG 202 Lab 1 - Stencil Halo", NULL);
	SDL_EnableKeyRepeat(10, 10);
	
	return true;
}

bool initGL(){
	glClearColor(0.0, 0.0, 0.0, 0);
	glEnable(GL_DEPTH_TEST);
	glEnable(GL_TEXTURE_2D);
	glEnable(GL_COLOR_MATERIAL);
	glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
	
	//// Rendering 
	glEnableClientState(GL_VERTEX_ARRAY);
	glEnableClientState(GL_NORMAL_ARRAY);
	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
	
	//// Lighting
	setAmbience(1.0, 1.0, 1.0, 1.0);
	setDiffuse(1.0, 1.0, 1.0, 1.0);
	setSpecular(1.0, 1.0, 1.0, 1.0);
	setLightPosition(-1.0, -1.0, -1.0, 1.0);
	glEnable(GL_LIGHTING);
	glEnable(GL_LIGHT0);
	glShadeModel(GL_SMOOTH);
	glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
	glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
	glLightfv(GL_LIGHT0, GL_SPECULAR, specular);
	
	if(glGetError() != GL_NO_ERROR)
		return false;
	
	return true;
}

void draw(){
	Vector3 pos = camera.getPosition();
	Vector3 center = pos+camera.getDirectionVector();
	Vector3 up = camera.getUpVector();
	
	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
	glLoadIdentity();
	
	gluLookAt(pos.x(), pos.y(), pos.z(),
						center.x(), center.y(), center.z(),
						up.x(), up.y(), up.z());
	
	glLightfv(GL_LIGHT0, GL_POSITION, light);
	
	// Draws a quad as a basic surface
	glBegin(GL_QUADS);
		glColor3f(0.0, 0.8, 0.0);
		glVertex3f(-10, 0, -10);
		glVertex3f(10, 0, -10);
		glVertex3f(10, 0, 10);
		glVertex3f(-10, 0, 10);
		glColor3f(0.0, 0.0, 0.8);
		glVertex3f(-10, 10, -10);
		glVertex3f(10, 10, -10);
		glVertex3f(10, 0, -10);
		glVertex3f(-10, 0, -10);
		glColor3f(0.8, 0.0, 0.0);
		glVertex3f(-10, 10, 10);
		glVertex3f(10, 10, 10);
		glVertex3f(10, 0, 10);
		glVertex3f(-10, 0, 10);
	glEnd();
	
	glColor3f(1.0, 1.0, 1.0);
	
	/* Draw our meshes
	vector<Mesh>::iterator i = meshes.begin();
	for(i; i!=meshes.end(); i++)
		i->draw();*/
	
	SDL_GL_SwapBuffers();
}