/* Copyright 2005 Nicholas Bishop
 * 
 * This file is part of SharpConstruct.
 *
 * SharpConstruct is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * SharpConstruct is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with SharpConstruct; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

#include "Mesh.h"
#include "Output3D.hh"
#include <GL/gl.h>

#include <iostream>

using SharpConstruct::VAR;

VAR::VAR()
: triangle_count_( 0 ),
  quad_count_( 0 )
{
	glEnableClientState( GL_VERTEX_ARRAY );
	glEnableClientState( GL_NORMAL_ARRAY );
	glEnableClientState( GL_COLOR_ARRAY );
}

bool VAR::IsSupported()
{
	return true;
}

void VAR::Set( const Mesh& mesh, const bool vn,
	       const bool c, const bool p )
{
	if( vn )
	{
		glVertexPointer( 3, GL_FLOAT, sizeof( Optimized::Point3D ), &mesh.VertexLocations()[ 0 ] );
		glNormalPointer( GL_FLOAT, sizeof( Optimized::Point3D ), &mesh.VertexNormals()[ 0 ] );
	}
	
	if( c )
		glColorPointer( 3, GL_FLOAT, 0, &mesh.VertexColors()[ 0 ] );

	if( p )
	{
		triangle_count_ = mesh.VisibleElements().Triangles * 3;
		triangle_data_ = &mesh.Triangles()[ 0 ];

		quad_count_ = mesh.VisibleElements().Quads * 4;
		quad_data_ = &mesh.Quads()[ 0 ];
	}
}

void VAR::Draw() const
{
	glDrawElements( GL_TRIANGLES, triangle_count_,
			GL_UNSIGNED_INT, triangle_data_ );
	glDrawElements( GL_QUADS, quad_count_,
			GL_UNSIGNED_INT, quad_data_ );
}