118 lines
4.5 KiB
C++
118 lines
4.5 KiB
C++
/*
|
|
Open Asset Import Library (assimp)
|
|
----------------------------------------------------------------------
|
|
|
|
Copyright (c) 2006-2022, assimp team
|
|
|
|
|
|
All rights reserved.
|
|
|
|
Redistribution and use of this software in source and binary forms,
|
|
with or without modification, are permitted provided that the
|
|
following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above
|
|
copyright notice, this list of conditions and the
|
|
following disclaimer.
|
|
|
|
* Redistributions in binary form must reproduce the above
|
|
copyright notice, this list of conditions and the
|
|
following disclaimer in the documentation and/or other
|
|
materials provided with the distribution.
|
|
|
|
* Neither the name of the assimp team, nor the names of its
|
|
contributors may be used to endorse or promote products
|
|
derived from this software without specific prior
|
|
written permission of the assimp team.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
----------------------------------------------------------------------
|
|
*/
|
|
|
|
/** @file Defines a helper class to compute a vertex-triangle adjacency map */
|
|
#ifndef AI_VTADJACENCY_H_INC
|
|
#define AI_VTADJACENCY_H_INC
|
|
|
|
#include "BaseProcess.h"
|
|
#include <assimp/types.h>
|
|
#include <assimp/ai_assert.h>
|
|
|
|
struct aiMesh;
|
|
struct aiFace;
|
|
|
|
namespace Assimp {
|
|
|
|
// --------------------------------------------------------------------------------------------
|
|
/** @brief The VertexTriangleAdjacency class computes a vertex-triangle
|
|
* adjacency map from a given index buffer.
|
|
*
|
|
* @note Although it is called #VertexTriangleAdjacency, the current version does also
|
|
* support arbitrary polygons. */
|
|
// --------------------------------------------------------------------------------------------
|
|
class ASSIMP_API VertexTriangleAdjacency {
|
|
public:
|
|
// ----------------------------------------------------------------------------
|
|
/** @brief Construction from an existing index buffer
|
|
* @param pcFaces Index buffer
|
|
* @param iNumFaces Number of faces in the buffer
|
|
* @param iNumVertices Number of referenced vertices. This value
|
|
* is computed automatically if 0 is specified.
|
|
* @param bComputeNumTriangles If you want the class to compute
|
|
* a list containing the number of referenced triangles per vertex
|
|
* per vertex - pass true. */
|
|
VertexTriangleAdjacency(aiFace* pcFaces,unsigned int iNumFaces,
|
|
unsigned int iNumVertices = 0,
|
|
bool bComputeNumTriangles = true);
|
|
|
|
// ----------------------------------------------------------------------------
|
|
/** @brief Destructor */
|
|
~VertexTriangleAdjacency();
|
|
|
|
// ----------------------------------------------------------------------------
|
|
/** @brief Get all triangles adjacent to a vertex
|
|
* @param iVertIndex Index of the vertex
|
|
* @return A pointer to the adjacency list. */
|
|
unsigned int* GetAdjacentTriangles(unsigned int iVertIndex) const {
|
|
ai_assert(iVertIndex < mNumVertices);
|
|
return &mAdjacencyTable[ mOffsetTable[iVertIndex]];
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
/** @brief Get the number of triangles that are referenced by
|
|
* a vertex. This function returns a reference that can be modified
|
|
* @param iVertIndex Index of the vertex
|
|
* @return Number of referenced triangles */
|
|
unsigned int& GetNumTrianglesPtr(unsigned int iVertIndex) {
|
|
ai_assert( iVertIndex < mNumVertices );
|
|
ai_assert( nullptr != mLiveTriangles );
|
|
return mLiveTriangles[iVertIndex];
|
|
}
|
|
|
|
//! Offset table
|
|
unsigned int* mOffsetTable;
|
|
|
|
//! Adjacency table
|
|
unsigned int* mAdjacencyTable;
|
|
|
|
//! Table containing the number of referenced triangles per vertex
|
|
unsigned int* mLiveTriangles;
|
|
|
|
//! Debug: Number of referenced vertices
|
|
unsigned int mNumVertices;
|
|
};
|
|
|
|
} //! ns Assimp
|
|
|
|
#endif // !! AI_VTADJACENCY_H_INC
|