#include <cmath>
#include <Util/exceptions.h>
#include "camera.h"
#include "shape.h"

using namespace Ray;
using namespace Util;

////////////
// Camera //
////////////

Ray3D Camera::getRay( int i , int j , int width , int height ) const
{
	/////////////////////////////////////////////////
	// Get the ray through the (i,j)-th pixel here //
	/////////////////////////////////////////////////
	THROW( "method undefined" );
	return Ray3D();
}

void Camera::drawOpenGL( void ) const
{
	glMatrixMode( GL_MODELVIEW );        
	glLoadIdentity();
	gluLookAt( position[0] , position[1] , position[2] , position[0]+forward[0] , position[1]+forward[1] , position[2]+forward[2] , up[0] , up[1] , up[2] );

	// Sanity check to make sure that OpenGL state is good
	ASSERT_OPEN_GL_STATE();	
}

void Camera::rotateUp( Point3D center , double angle )
{
	///////////////////////////////////////////////////
	// Rotate the camera about the up direction here //
	///////////////////////////////////////////////////
	THROW( "method undefined" );
}

void Camera::rotateRight( Point3D center , double angle )
{
	//////////////////////////////////////////////////////
	// Rotate the camera about the right direction here //
	//////////////////////////////////////////////////////
	THROW( "method undefined" );
}

void Camera::moveForward( double dist )
{
	//////////////////////////////////
	// Move the camera forward here //
	//////////////////////////////////
	THROW( "method undefined" );
}

void Camera::moveRight( double dist )
{
	///////////////////////////////////////
	// Move the camera to the right here //
	///////////////////////////////////////
	THROW( "method undefined" );
}

void Camera::moveUp( double dist )
{
	/////////////////////////////
	// Move the camera up here //
	/////////////////////////////
	THROW( "method undefined" );
}