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/* SPDX-License-Identifier: GPL-2.0-or-later */
#pragma once
/** \file
* \ingroup freestyle
* \brief Class to define a cell grid surrounding the projected image of a scene
*/
#include <algorithm>
#include <memory>
#include <stdexcept>
#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 */
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