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/** \file blender/freestyle/intern/view_map/HeuristicGridDensityProviderFactory.cpp
 *  \ingroup freestyle
 *  \brief Class to define a cell grid surrounding the projected image of a scene
 *  \author Alexander Beels
 *  \date 2011-2-8
 */

#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;
	}
}