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ImproveCacheLocality crashes if non triangular faces

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This commit is contained in:
Sergio Acereda
2018-04-23 11:33:48 +02:00
parent bdbad4c64f
commit ce6a5e5d56
2 changed files with 20 additions and 17 deletions
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24
code/VertexTriangleAdjacency.cpp
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@@ -88,10 +88,13 @@ VertexTriangleAdjacency::VertexTriangleAdjacency(aiFace *pcFaces,
*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]]++;
for (aiFace* pcFace = pcFaces; pcFace != pcFaceEnd; ++pcFace)
{
unsigned nind = pcFace->mNumIndices;
unsigned * ind = pcFace->mIndices;
if (nind > 0) pi[ind[0]]++;
if (nind > 1) pi[ind[1]]++;
if (nind > 2) pi[ind[2]]++;
}
// second pass: compute the final offset table
@@ -109,15 +112,12 @@ VertexTriangleAdjacency::VertexTriangleAdjacency(aiFace *pcFaces,
this->mAdjacencyTable = new unsigned int[iSum];
iSum = 0;
for (aiFace* pcFace = pcFaces; pcFace != pcFaceEnd; ++pcFace,++iSum) {
unsigned nind = pcFace->mNumIndices;
unsigned * ind = pcFace->mIndices;
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;
if (nind > 0) mAdjacencyTable[pi[ind[0]]++] = iSum;
if (nind > 1) mAdjacencyTable[pi[ind[1]]++] = iSum;
if (nind > 2) mAdjacencyTable[pi[ind[2]]++] = 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.