//
//  Filename         : HeuristicGridDensityProviderFactory.cpp
//  Author(s)        : Alexander Beels
//  Purpose          : Class to define a cell grid surrounding
//                     the projected image of a scene
//  Date of creation : 2011-2-8
//
///////////////////////////////////////////////////////////////////////////////


//
//  Copyright (C) : Please refer to the COPYRIGHT file distributed 
//   with this source distribution. 
//
//  This program 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.
//
//  This program 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 this program; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
//
///////////////////////////////////////////////////////////////////////////////

#include "HeuristicGridDensityProviderFactory.h"

HeuristicGridDensityProviderFactory::HeuristicGridDensityProviderFactory(real sizeFactor, unsigned numFaces)
	: sizeFactor(sizeFactor), numFaces(numFaces)
{
}

HeuristicGridDensityProviderFactory::~HeuristicGridDensityProviderFactory () {}

auto_ptr<GridDensityProvider> HeuristicGridDensityProviderFactory::newGridDensityProvider(OccluderSource& source, const real proscenium[4]) 
{
	auto_ptr<AverageAreaGridDensityProvider> avg(new AverageAreaGridDensityProvider(source, proscenium, sizeFactor));
	auto_ptr<Pow23GridDensityProvider> p23(new Pow23GridDensityProvider(source, proscenium, numFaces));
	if ( avg->cellSize() > p23->cellSize() ) {
		return (auto_ptr<GridDensityProvider>) p23;
	} else {
		return (auto_ptr<GridDensityProvider>) avg;
	}
}

auto_ptr<GridDensityProvider> HeuristicGridDensityProviderFactory::newGridDensityProvider(OccluderSource& source, const BBox<Vec3r>& bbox, const GridHelpers::Transform& transform) 
{
	auto_ptr<AverageAreaGridDensityProvider> avg(new AverageAreaGridDensityProvider(source, bbox, transform, sizeFactor));
	auto_ptr<Pow23GridDensityProvider> p23(new Pow23GridDensityProvider(source, bbox, transform, numFaces));
	if ( avg->cellSize() > p23->cellSize() ) {
		return (auto_ptr<GridDensityProvider>) p23;
	} else {
		return (auto_ptr<GridDensityProvider>) avg;
	}
}

auto_ptr<GridDensityProvider> HeuristicGridDensityProviderFactory::newGridDensityProvider(OccluderSource& source) 
{
	real proscenium[4];
	GridDensityProvider::calculateOptimalProscenium(source, proscenium);
	auto_ptr<AverageAreaGridDensityProvider> avg(new AverageAreaGridDensityProvider(source, proscenium, sizeFactor));
	auto_ptr<Pow23GridDensityProvider> p23(new Pow23GridDensityProvider(source, proscenium, numFaces));
	if ( avg->cellSize() > p23->cellSize() ) {
		return (auto_ptr<GridDensityProvider>) p23;
	} else {
		return (auto_ptr<GridDensityProvider>) avg;
	}
}