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/***************************************************************************
* Copyright (c) 2005 Berthold Grupp *
* *
* This file is part of the FreeCAD CAx development system. *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License as published by the Free Software Foundation; either *
* version 2 of the License, or (at your option) any later version. *
* *
* This library 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 Library General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this library; see the file COPYING.LIB. If not, *
* write to the Free Software Foundation, Inc., 59 Temple Place, *
* Suite 330, Boston, MA 02111-1307, USA *
* *
***************************************************************************/
#ifndef MESH_BUILDER_H
#define MESH_BUILDER_H
#include <set>
#include <vector>
#include "MeshKernel.h"
namespace Base
{
class SequencerLauncher;
}
namespace MeshCore
{
class MeshKernel;
class MeshPoint;
class MeshGeomFacet;
/**
* Class for creating the mesh structure by adding facets. Building the structure needs 3 steps:
* 1. initializing
* 2. adding the facets
* 3. finishing
* \code
* // Sample Code for building a mesh structure
* MeshBuilder builder(someMeshReference);
* builder.Initialize(numberOfFacets);
* ...
* for (...)
* builder.AddFacet(...);
* ...
* builder.Finish();
* \endcode
* @author Berthold Grupp
*/
class MeshExport MeshBuilder
{
private:
/** @name Helper class */
//@{
class Edge
{
public:
PointIndex pt1;
PointIndex pt2;
FacetIndex facetIdx;
Edge(PointIndex p1, PointIndex p2, FacetIndex idx)
: facetIdx {idx}
{
if (p1 > p2) {
pt1 = p2;
pt2 = p1;
}
else {
pt1 = p1;
pt2 = p2;
}
}
bool operator<(const Edge& e) const
{
return (pt1 == e.pt1) ? (pt2 < e.pt2) : (pt1 < e.pt1);
}
bool operator>(const Edge& e) const
{
return (pt1 == e.pt1) ? (pt2 > e.pt2) : (pt1 > e.pt1);
}
bool operator==(const Edge& e) const
{
return (pt1 == e.pt1) && (pt2 == e.pt2);
}
};
//@}
MeshKernel& _meshKernel;
std::set<MeshPoint> _points;
Base::SequencerLauncher* _seq {nullptr};
// keep an array of iterators pointing to the vertex inside the set to save memory
using MeshPointIterator = std::pair<std::set<MeshPoint>::iterator, bool>;
std::vector<MeshPointIterator> _pointsIterator;
size_t _ptIdx {0};
void SetNeighbourhood();
// As it's forbidden to insert a degenerated facet but insert its vertices anyway we must remove
// them
void RemoveUnreferencedPoints();
public:
explicit MeshBuilder(MeshKernel& kernel);
~MeshBuilder();
MeshBuilder(const MeshBuilder&) = delete;
MeshBuilder(MeshBuilder&&) = delete;
MeshBuilder& operator=(const MeshBuilder&) = delete;
MeshBuilder& operator=(MeshBuilder&&) = delete;
/**
* Set the tolerance for the comparison of points. Normally you don't need to set the tolerance.
*/
void SetTolerance(float);
/** Initializes the class. Must be done before adding facets
* @param ctFacets count of facets.
* @param deletion if true (default) the mesh-kernel will be cleared
* otherwise you can add new facets on an existing mesh-kernel
* @remarks To be efficient you should add exactly \a ctFacets with
* AddFacet(), otherwise you'll possibly run into wastage of memory
* and performance problems.
*/
void Initialize(size_t ctFacets, bool deletion = true);
/** adding facets */
/** Add new facet
* @param facet \a the facet
* @param takeFlag if true the flag from the MeshGeomFacet will be taken
* @param takeProperty
*/
void AddFacet(const MeshGeomFacet& facet, bool takeFlag = false, bool takeProperty = false);
/** Add new facet
*/
void AddFacet(
const Base::Vector3f& pt1,
const Base::Vector3f& pt2,
const Base::Vector3f& pt3,
const Base::Vector3f& normal,
unsigned char flag = 0,
unsigned long prop = 0
);
/** Add new facet
* @param facetPoints Array of vectors (size 4) in order of vec1, vec2,
* vec3, normal
* @param flag
* @param prop
*/
void AddFacet(Base::Vector3f* facetPoints, unsigned char flag = 0, unsigned long prop = 0);
/** Finishes building up the mesh structure. Must be done after adding facets.
* @param freeMemory if false (default) only the memory of internal
* structures gets freed, otherwise additional unneeded memory in the
* mesh structure is tried to be freed.
* @remarks If you have called AddFacet() as many times as specified in
* Initialize() then absolutely no memory is wasted and you can leave the
* default value.
*/
void Finish(bool freeMemory = false);
friend class MeshKernel;
private:
float _fSaveTolerance;
};
/**
* Class for creating the mesh structure by adding facets. Building the structure needs 3 steps:
* 1. initializing
* 2. adding the facets
* 3. finishing
* \code
* // Sample Code for building a mesh structure
* MeshFastBuilder builder(someMeshReference);
* builder.Initialize(numberOfFacets);
* ...
* for (...)
* builder.AddFacet(...);
* ...
* builder.Finish();
* \endcode
* @author Werner Mayer
*/
class MeshExport MeshFastBuilder
{
private:
MeshKernel& _meshKernel;
public:
using size_type = int;
explicit MeshFastBuilder(MeshKernel& rclM);
~MeshFastBuilder();
MeshFastBuilder(const MeshFastBuilder&) = delete;
MeshFastBuilder(MeshFastBuilder&&) = delete;
MeshFastBuilder& operator=(const MeshFastBuilder&) = delete;
MeshFastBuilder& operator=(MeshFastBuilder&&) = delete;
/** Initializes the class. Must be done before adding facets
* @param ctFacets count of facets.
*/
void Initialize(size_type ctFacets);
/** Add new facet
*/
void AddFacet(const Base::Vector3f* facetPoints);
/** Add new facet
*/
void AddFacet(const MeshGeomFacet& facetPoints);
/** Finishes building up the mesh structure. Must be done after adding facets.
*/
void Finish();
private:
struct Private;
Private* p;
};
} // namespace MeshCore
#endif
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