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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2010 Blender Foundation.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL LICENSE BLOCK *****
*/
#ifndef __FREESTYLE_GRID_DENSITY_PROVIDER_H__
#define __FREESTYLE_GRID_DENSITY_PROVIDER_H__
/** \file blender/freestyle/intern/view_map/GridDensityProvider.h
* \ingroup freestyle
* \brief Class to define a cell grid surrounding the projected image of a scene
* \author Alexander Beels
* \date 2011-2-5
*/
#include <stdexcept>
#include <memory>
#include "OccluderSource.h"
#include "../geometry/BBox.h"
class GridDensityProvider
{
// Disallow copying and assignment
GridDensityProvider(const GridDensityProvider& other);
GridDensityProvider& operator=(const GridDensityProvider& other);
public:
GridDensityProvider(OccluderSource& source) : source(source) {}
virtual ~GridDensityProvider() {};
float cellSize()
{
return _cellSize;
}
unsigned cellsX()
{
return _cellsX;
}
unsigned cellsY()
{
return _cellsY;
}
float cellOrigin(int index)
{
if (index < 2) {
return _cellOrigin[index];
}
else {
throw new out_of_range("GridDensityProvider::cellOrigin can take only indexes of 0 or 1.");
}
}
static void calculateOptimalProscenium(OccluderSource& source, real proscenium[4])
{
source.begin();
if (source.isValid()) {
const Vec3r& initialPoint = source.getGridSpacePolygon().getVertices()[0];
proscenium[0] = proscenium[1] = initialPoint[0];
proscenium[2] = proscenium[3] = initialPoint[1];
while (source.isValid()) {
GridHelpers::expandProscenium (proscenium, source.getGridSpacePolygon());
source.next();
}
}
cout << "Proscenium: (" << proscenium[0] << ", " << proscenium[1] << ", " << proscenium[2]
<< ", " << proscenium[3] << ")" << endl;
}
static void calculateQuickProscenium(const GridHelpers::Transform& transform, const BBox<Vec3r>& bbox,
real proscenium[4])
{
real z;
// We want to use the z-coordinate closest to the camera to determine the proscenium face
if (::fabs(bbox.getMin()[2]) < ::fabs(bbox.getMax()[2])) {
z = bbox.getMin()[2];
}
else {
z = bbox.getMax()[2];
}
// Now calculate the proscenium according to the min and max values of the x and y coordinates
Vec3r minPoint = transform(Vec3r(bbox.getMin()[0], bbox.getMin()[1], z));
Vec3r maxPoint = transform(Vec3r(bbox.getMax()[0], bbox.getMax()[1], z));
cout << "Bounding box: " << minPoint << " to " << maxPoint << endl;
proscenium[0] = std::min(minPoint[0], maxPoint[0]);
proscenium[1] = std::max(minPoint[0], maxPoint[0]);
proscenium[2] = std::min(minPoint[1], maxPoint[1]);
proscenium[3] = std::max(minPoint[1], maxPoint[1]);
cout << "Proscenium : " << proscenium[0] << ", " << proscenium[1] << ", " << proscenium[2] << ", "
<< proscenium[3] << endl;
}
protected:
OccluderSource& source;
unsigned _cellsX, _cellsY;
float _cellSize;
float _cellOrigin[2];
};
class GridDensityProviderFactory
{
// Disallow copying and assignment
GridDensityProviderFactory (const GridDensityProviderFactory& other);
GridDensityProviderFactory& operator= (const GridDensityProviderFactory& other);
public:
GridDensityProviderFactory() {}
virtual auto_ptr<GridDensityProvider> newGridDensityProvider(OccluderSource& source, const real proscenium[4]) = 0;
virtual auto_ptr<GridDensityProvider> newGridDensityProvider(OccluderSource& source, const BBox<Vec3r>& bbox,
const GridHelpers::Transform& transform) = 0;
virtual auto_ptr<GridDensityProvider> newGridDensityProvider(OccluderSource& source) = 0;
virtual ~GridDensityProviderFactory () {}
};
#endif // __FREESTYLE_GRID_DENSITY_PROVIDER_H__
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