assimp/code/VertexTriangleAdjacency.cpp

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/*
---------------------------------------------------------------------------
Open Asset Import Library (ASSIMP)
---------------------------------------------------------------------------
Copyright (c) 2006-2008, ASSIMP Development 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 Development 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 Implementation of the VertexTriangleAdjacency helper class
*/
#include "AssimpPCH.h"
// internal headers
#include "VertexTriangleAdjacency.h"
using namespace Assimp;
// ------------------------------------------------------------------------------------------------
VertexTriangleAdjacency::VertexTriangleAdjacency(aiFace *pcFaces,
unsigned int iNumFaces,
unsigned int iNumVertices /*= 0*/,
bool bComputeNumTriangles /*= false*/)
{
// compute the number of referenced vertices if it wasn't specified by the caller
const aiFace* const pcFaceEnd = pcFaces + iNumFaces;
if (!iNumVertices) {
for (aiFace* pcFace = pcFaces; pcFace != pcFaceEnd; ++pcFace) {
Fixed some minor issues in the AC loader. However, it still crashes with large and complicated models. Line handling is complete. Moved the code to find degenerated primitives to a separate step that is not anymore active by default. The FindInvalidData-Step isn't active by default now. It hast a flag and must be explicitly requested. Added line and point handling code to the CalcTangentsStep - not yet tested. Added support for the Sense 8 (WorldToolKit) NFF file format. The format uses the same file extension as the "Neutral File Format" (and is implemented in the same loader). Seems to work well, added test files for it. Added itoa10 function - so we have itoa on all platforms. Small optimizations in the SortByPType step. Fixed the material validation: textured meshes without uv coords cause a warning now. Fixed a minor isses with the OFF loader. Added empty unit tests for the new steps - to be filled in the next days. Added SceneCombiner.cpp. It contains utilities to join meshes and scenes. The latter will be needed by the LWS loader (LWS files contain references to external LWO files and the LWO loader is already to complicated that it would make sense to add an additional code path to it). Mesh joining is needed by some pp steps, but the code has not yet been moved to its new location. Added WIP light & camera support to the ASE loader. Works for the moment, but there's much missing. ASE parser refactored, the code is still quite long but at least cleaner. Fixed a bug that caused ASE to import invalid texture coordinates. Makefiles and VC8 solution are up-to-date. The rest isn't. git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@192 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
2008-10-22 20:06:16 +00:00
ai_assert(3 == pcFace->mNumIndices);
iNumVertices = std::max(iNumVertices,pcFace->mIndices[0]);
iNumVertices = std::max(iNumVertices,pcFace->mIndices[1]);
iNumVertices = std::max(iNumVertices,pcFace->mIndices[2]);
}
}
unsigned int* pi;
// allocate storage
if (bComputeNumTriangles) {
pi = mLiveTriangles = new unsigned int[iNumVertices+1];
memset(mLiveTriangles,0,sizeof(unsigned int)*(iNumVertices+1));
mOffsetTable = new unsigned int[iNumVertices+2]+1;
}
else {
pi = mOffsetTable = new unsigned int[iNumVertices+2]+1;
memset(mOffsetTable,0,sizeof(unsigned int)*(iNumVertices+1));
mLiveTriangles = NULL; // important, otherwise the d'tor would crash
}
// get a pointer to the end of the buffer
unsigned int* piEnd = pi+iNumVertices;
*piEnd++ = 0u;
// first pass: compute the number of faces referencing each vertex
for (aiFace* pcFace = pcFaces; pcFace != pcFaceEnd; ++pcFace)
{
pi[pcFace->mIndices[0]]++;
pi[pcFace->mIndices[1]]++;
pi[pcFace->mIndices[2]]++;
}
// second pass: compute the final offset table
unsigned int iSum = 0;
unsigned int* piCurOut = this->mOffsetTable;
for (unsigned int* piCur = pi; piCur != piEnd;++piCur,++piCurOut) {
unsigned int iLastSum = iSum;
iSum += *piCur;
*piCurOut = iLastSum;
}
pi = this->mOffsetTable;
// third pass: compute the final table
this->mAdjacencyTable = new unsigned int[iSum];
iSum = 0;
for (aiFace* pcFace = pcFaces; pcFace != pcFaceEnd; ++pcFace,++iSum) {
unsigned int idx = pcFace->mIndices[0];
mAdjacencyTable[pi[idx]++] = iSum;
idx = pcFace->mIndices[1];
mAdjacencyTable[pi[idx]++] = iSum;
idx = pcFace->mIndices[2];
mAdjacencyTable[pi[idx]++] = iSum;
}
// fourth pass: undo the offset computations made during the third pass
// We could do this in a separate buffer, but this would be TIMES slower.
--mOffsetTable;
*mOffsetTable = 0u;
}
// ------------------------------------------------------------------------------------------------
VertexTriangleAdjacency::~VertexTriangleAdjacency()
{
// delete allocated storage
delete[] mOffsetTable;
delete[] mAdjacencyTable;
delete[] mLiveTriangles;
}