155 lines
3.3 KiB
C++
155 lines
3.3 KiB
C++
/*
|
|
* ***** 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:
|
|
* OGF/Graphite: Geometry and Graphics Programming Library + Utilities
|
|
* Copyright (C) 2000 Bruno Levy
|
|
* Contact: Bruno Levy
|
|
* levy@loria.fr
|
|
* ISA Project
|
|
* LORIA, INRIA Lorraine,
|
|
* Campus Scientifique, BP 239
|
|
* 54506 VANDOEUVRE LES NANCY CEDEX
|
|
* FRANCE
|
|
*
|
|
* Contributor(s): none yet.
|
|
*
|
|
* ***** END GPL LICENSE BLOCK *****
|
|
*/
|
|
|
|
#ifndef __MESH_TOOLS_MATH_NORMAL_CYCLE__
|
|
#define __MESH_TOOLS_MATH_NORMAL_CYCLE__
|
|
|
|
/** \file blender/freestyle/intern/geometry/normal_cycle.h
|
|
* \ingroup freestyle
|
|
* \author Bruno Levy
|
|
*/
|
|
|
|
#include "Geom.h"
|
|
|
|
#include "../system/FreestyleConfig.h"
|
|
|
|
#ifdef WITH_CXX_GUARDEDALLOC
|
|
#include "MEM_guardedalloc.h"
|
|
#endif
|
|
|
|
namespace Freestyle {
|
|
|
|
using namespace Geometry;
|
|
|
|
namespace OGF {
|
|
|
|
template <class T> inline void ogf_swap(T& x, T& y)
|
|
{
|
|
T z = x ;
|
|
x = y ;
|
|
y = z ;
|
|
}
|
|
|
|
//_________________________________________________________
|
|
|
|
/**
|
|
* NormalCycle evaluates the curvature tensor in function
|
|
* of a set of dihedral angles and associated vectors.
|
|
* Reference:
|
|
* Restricted Delaunay Triangulation and Normal Cycle,
|
|
* D. Cohen-Steiner and J.M. Morvan,
|
|
* SOCG 2003
|
|
*/
|
|
class NormalCycle {
|
|
public:
|
|
NormalCycle();
|
|
void begin();
|
|
void end();
|
|
/**
|
|
* Note: the specified edge vector needs to be pre-clipped by the neighborhood.
|
|
*/
|
|
void accumulate_dihedral_angle(const Vec3r& edge, real angle, real neigh_area = 1.0);
|
|
|
|
const Vec3r& eigen_vector(int i) const
|
|
{
|
|
return axis_[i_[i]];
|
|
}
|
|
|
|
real eigen_value(int i) const
|
|
{
|
|
return eigen_value_[i_[i]];
|
|
}
|
|
|
|
const Vec3r& N() const
|
|
{
|
|
return eigen_vector(2);
|
|
}
|
|
|
|
const Vec3r& Kmax() const
|
|
{
|
|
return eigen_vector(1);
|
|
}
|
|
|
|
const Vec3r& Kmin() const
|
|
{
|
|
return eigen_vector(0);
|
|
}
|
|
|
|
real n() const
|
|
{
|
|
return eigen_value(2);
|
|
}
|
|
|
|
real kmax() const
|
|
{
|
|
return eigen_value(1);
|
|
}
|
|
|
|
real kmin() const
|
|
{
|
|
return eigen_value(0);
|
|
}
|
|
|
|
private:
|
|
/* UNUSED */
|
|
// real center_[3];
|
|
Vec3r axis_[3];
|
|
real eigen_value_[3];
|
|
real M_[6];
|
|
int i_[3];
|
|
|
|
#ifdef WITH_CXX_GUARDEDALLOC
|
|
MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:OGF:NormalCycle")
|
|
#endif
|
|
};
|
|
|
|
inline void NormalCycle::accumulate_dihedral_angle(const Vec3r& edge, const double beta, double neigh_area)
|
|
{
|
|
double s = beta * neigh_area / edge.norm();
|
|
|
|
M_[0] += s * edge.x() * edge.x();
|
|
M_[1] += s * edge.x() * edge.y();
|
|
M_[2] += s * edge.y() * edge.y();
|
|
M_[3] += s * edge.x() * edge.z();
|
|
M_[4] += s * edge.y() * edge.z();
|
|
M_[5] += s * edge.z() * edge.z();
|
|
}
|
|
|
|
//_________________________________________________________
|
|
|
|
} // OGF namespace
|
|
|
|
} /* namespace Freestyle */
|
|
|
|
#endif // __MESH_TOOLS_MATH_NORMAL_CYCLE__
|