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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.
*
* ***** 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 <algorithm>
#include <memory>
#include "AutoPtrHelper.h"
#include "OccluderSource.h"
#include "../geometry/BBox.h"
#include "BKE_global.h"
#ifdef WITH_CXX_GUARDEDALLOC
#include "MEM_guardedalloc.h"
#endif
namespace Freestyle {
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();
}
}
if (G.debug & G_DEBUG_FREESTYLE) {
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])
{
// Transform the coordinates of the 8 corners of the 3D bounding box
real xm = bbox.getMin()[0], xM = bbox.getMax()[0];
real ym = bbox.getMin()[1], yM = bbox.getMax()[1];
real zm = bbox.getMin()[2], zM = bbox.getMax()[2];
Vec3r p1 = transform(Vec3r(xm, ym, zm));
Vec3r p2 = transform(Vec3r(xm, ym, zM));
Vec3r p3 = transform(Vec3r(xm, yM, zm));
Vec3r p4 = transform(Vec3r(xm, yM, zM));
Vec3r p5 = transform(Vec3r(xM, ym, zm));
Vec3r p6 = transform(Vec3r(xM, ym, zM));
Vec3r p7 = transform(Vec3r(xM, yM, zm));
Vec3r p8 = transform(Vec3r(xM, yM, zM));
// Determine the proscenium face according to the min and max values of the transformed x and y coordinates
proscenium[0] = std::min(std::min(std::min(p1.x(), p2.x()), std::min(p3.x(), p4.x())),
std::min(std::min(p5.x(), p6.x()), std::min(p7.x(), p8.x())));
proscenium[1] = std::max(std::max(std::max(p1.x(), p2.x()), std::max(p3.x(), p4.x())),
std::max(std::max(p5.x(), p6.x()), std::max(p7.x(), p8.x())));
proscenium[2] = std::min(std::min(std::min(p1.y(), p2.y()), std::min(p3.y(), p4.y())),
std::min(std::min(p5.y(), p6.y()), std::min(p7.y(), p8.y())));
proscenium[3] = std::max(std::max(std::max(p1.y(), p2.y()), std::max(p3.y(), p4.y())),
std::max(std::max(p5.y(), p6.y()), std::max(p7.y(), p8.y())));
if (G.debug & G_DEBUG_FREESTYLE) {
cout << "Proscenium: " << proscenium[0] << ", " << proscenium[1] << ", " << proscenium[2] << ", " <<
proscenium[3] << endl;
}
}
protected:
OccluderSource& source;
unsigned _cellsX, _cellsY;
float _cellSize;
float _cellOrigin[2];
#ifdef WITH_CXX_GUARDEDALLOC
MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:GridDensityProvider")
#endif
};
class GridDensityProviderFactory
{
// Disallow copying and assignment
GridDensityProviderFactory(const GridDensityProviderFactory& other);
GridDensityProviderFactory& operator=(const GridDensityProviderFactory& other);
public:
GridDensityProviderFactory() {}
virtual AutoPtr<GridDensityProvider> newGridDensityProvider(OccluderSource& source, const real proscenium[4]) = 0;
virtual AutoPtr<GridDensityProvider> newGridDensityProvider(OccluderSource& source, const BBox<Vec3r>& bbox,
const GridHelpers::Transform& transform) = 0;
virtual AutoPtr<GridDensityProvider> newGridDensityProvider(OccluderSource& source) = 0;
virtual ~GridDensityProviderFactory () {}
#ifdef WITH_CXX_GUARDEDALLOC
MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:GridDensityProviderFactory")
#endif
};
} /* namespace Freestyle */
#endif // __FREESTYLE_GRID_DENSITY_PROVIDER_H__
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