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//##########################################################################
//# #
//# CCLIB #
//# #
//# This program 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; version 2 or later of the #
//# License. #
//# #
//# 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. #
//# #
//# COPYRIGHT: EDF R&D / TELECOM ParisTech (ENST-TSI) #
//# #
//##########################################################################
#ifndef GENERIC_INDEXED_MESH_HEADER
#define GENERIC_INDEXED_MESH_HEADER
//Local
#include "GenericMesh.h"
namespace CCLib
{
//! Triangle described by the indexes of its 3 vertices
struct VerticesIndexes
{
union
{
struct
{
unsigned i1, i2, i3;
};
unsigned i[3];
};
//! Constructor with specified indexes
VerticesIndexes(unsigned _i1, unsigned _i2, unsigned _i3)
: i1(_i1)
, i2(_i2)
, i3(_i3)
{}
//! Default constructor
VerticesIndexes()
: i1(0)
, i2(0)
, i3(0)
{}
};
//! A generic mesh with index-based vertex access
/** Implements the GenericMehs interface.
**/
class CC_CORE_LIB_API GenericIndexedMesh : public GenericMesh
{
public:
//! Default destructor
~GenericIndexedMesh() override = default;
//! Returns the ith triangle
/** Virtual method to request a triangle with a specific index.
The returned object can be temporary.
\param triangleIndex of the requested triangle (between 0 and the mesh size-1)
\return the requested triangle, or 0 if index value is not valid
**/
virtual GenericTriangle* _getTriangle(unsigned triangleIndex) = 0;
//! Returns the indexes of the vertices of a given triangle
/** \param triangleIndex index of the triangle (between 0 and size(mesh)-1)
\return the triangle indexes (or 0 if index value is not valid)
**/
virtual VerticesIndexes* getTriangleVertIndexes(unsigned triangleIndex) = 0;
//! Returns the vertices of a given triangle
/** \param[in] triangleIndex index of the triangle (between 0 and the size(mesh)-1)
\param[out] A first vertex
\param[out] B second vertex
\param[out] C third vertex
**/
virtual void getTriangleVertices(unsigned triangleIndex, CCVector3& A, CCVector3& B, CCVector3& C) const = 0;
//! Returns the indexes of the vertices of the next triangle (relatively to the global iterator position)
/** \return the triangle indexes (or 0 if the global iterator is out of bounds)
**/
virtual VerticesIndexes* getNextTriangleVertIndexes() = 0;
};
}
#endif //GENERIC_INDEXED_MESH_HEADER
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