/* Copyright 2004, 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 "config.h"
#include "Render.h"
#ifdef HAVE_AQSIS_RI_H
#include <aqsis/ri.h>
#include <cstdlib>
#endif
 
void SharpConstruct::ExternalRender::Render( Mesh& m )
{
#ifdef HAVE_AQSIS_RI_H
	// Temp c strings
	char* in = new char[ ImageName.length() ];
	strcpy( in, ImageName.c_str() );
	char* rn = new char[ RIBName.length() ];
	strcpy( rn, RIBName.c_str() );
	
	// This code is largely based on the RI2RIB tutorial on the Aqsis website
	
	RtFloat fov = 40;
	
	RtFloat light1_Int = 0.05;
	RtFloat light2_Int = 1.5;
	RtFloat light3_Int = 1;
	RtPoint light2_From = { 5, 5, 5 };
	RtPoint light2_To = { 0, 0, 0 };
	RtPoint light3_From = { 5, 5,-5 };
	RtPoint light3_To = { 0, 0, 0 };
	
	RtColor colorPlane = { 0.515, 0.509, 0.520 };
	RiBegin( rn );
	RiDisplay( in, "file", RI_RGBA, RI_NULL );
	RiFormat( Width, Height, 1 );
	RiProjection( RI_PERSPECTIVE, "fov", &fov, RI_NULL );
	RiPixelSamples( 2, 2 );
	RiTranslate( 0, 0, 4 );
	RiRotate( 180, 1, 0, 0 );
	RiRotate( 180, 0, 0, 1 );
	RiWorldBegin();
	// Lights
	RiLightSource( "ambientlight","intensity",&light1_Int,RI_NULL);
	RiLightSource( "distantlight","intensity",&light2_Int,"from",light2_From,"to",light2_To,RI_NULL);
	RiLightSource( "distantlight","intensity",&light3_Int,"from",light3_From,"to",light3_To,RI_NULL);
	//RiSurface( "metal", "uniform float thickness", (RtPointer)&shaderVar,RI_NULL );
	RiTransformBegin();
	RiColor( colorPlane );
	//RiScale(4,4,4);
	//RiTranslate(-0.5,-0.5, 0);
	for( unsigned i = 0; i < m._triangles.size(); i += 3 )
	{
		RtPoint planePoint[ 3 ]	= { m._vertex_locations[ m._triangles[ i ].V[ 0 ] ].X(),
					    m._vertex_locations[ m._triangles[ i ].V[ 0 ] ].Y(),
					    m._vertex_locations[ m._triangles[ i ].V[ 0 ] ].Z(),
					    m._vertex_locations[ m._triangles[ i ].V[ 1 ] ].X(),
					    m._vertex_locations[ m._triangles[ i ].V[ 1 ] ].Y(),
					    m._vertex_locations[ m._triangles[ i ].V[ 1 ] ].Z(),
					    m._vertex_locations[ m._triangles[ i ].V[ 2 ] ].X(),
					    m._vertex_locations[ m._triangles[ i ].V[ 2 ] ].Y(),
					    m._vertex_locations[ m._triangles[ i ].V[ 2 ] ].Z() };
		
		RiPolygon(3, RI_P,(RtPointer)planePoint, RI_NULL);
	}
	
	RiTransformEnd();

	RiWorldEnd();
	RiEnd();
	
	std::string tmp = "aqsis " + RIBName;
	system( tmp.c_str() );
#endif
}