General

- Added format auto-detection to most loaders
  - Simplified BaseImporter::CanRead() with some utility methods
  - improved fast_atof -> no overruns anymore. Fuck you, irrlicht.
  - added assimp_cmd tool to allow command line model processing. Mainly adebugging tool for internal purposes, but others might find it useful, too.
  - vc8/vc9: revision number is now written to DLL version header
  - mkutil: some batch scripts to simplify tagging & building of release versions
  - some API cleanup
  - fixing some doxygen markup (+now explicit use of @file <filename>)
  - Icon for assimp_view and assimp_cmd

3DS
  - Normal vectors are not anymore inverted in some cases
  - Improved pivot handling
  - Improved handling of x-flipped meshes

Collada
  - fixed a minor bug (visual_scene element)

LWS 
  - WIP implementation. No animations yet, some bugs and crashes.
  - Animation system remains disabled, WIP code
  - many test files for LWS, but most of them test the anim support, which is, read above, currently disabled.

STL
  - fixing a log warning which appears for every model
  - added binary&ascii test spider, exported from truespace

MD3 
  - Cleaning up output tags for automatically joined player models.


IRR
  - Fixing coordinate system issues. 
  - Instance handling improved.
  - Some of the reported crashes not yet fixed.

PretransformVertices
  - Numerous performance improvements.
  - Added config option to preserve the hierarchy during the step.

RemoveRedundantMaterials
  - Added config option to specify a list of materials which are kept in every case.

UNREAL
  - Added support for the old unreal data format (*.a,*.d,*.uc)
  - tested only with exports from Milkshape
  - more Unreal stuff to come soon



git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@356 67173fc5-114c-0410-ac8e-9d2fd5bffc1f

code/CalcTangentsProcess.cpp

@@ -126,7 +126,7 @@ bool CalcTangentsProcess::ProcessMesh( aiMesh* pMesh, unsigned int meshIndex)
 	const float angleEpsilon = 0.9999f;
 
 	std::vector<bool> vertexDone( pMesh->mNumVertices, false);
-	const float qnan = std::numeric_limits<float>::quiet_NaN();
+	const float qnan = get_qnan();
 
 	// create space for the tangents and bitangents
 	pMesh->mTangents = new aiVector3D[pMesh->mNumVertices];
@@ -149,8 +149,10 @@ bool CalcTangentsProcess::ProcessMesh( aiMesh* pMesh, unsigned int meshIndex)
 			// their tangent vectors are set to qnan.
 			for (unsigned int i = 0; i < face.mNumIndices;++i)
 			{
-				vertexDone[face.mIndices[i]] = true;
-				meshTang  [face.mIndices[i]] = qnan;
+				register unsigned int idx = face.mIndices[i];
+				vertexDone  [idx] = true;
+				meshTang    [idx] = qnan;
+				meshBitang  [idx] = qnan;
 			}
 
 			continue;
@@ -218,10 +220,10 @@ bool CalcTangentsProcess::ProcessMesh( aiMesh* pMesh, unsigned int meshIndex)
 		vertexFinder = &_vertexFinder;
 		posEpsilon = ComputePositionEpsilon(pMesh);
 	}
-
 	std::vector<unsigned int> verticesFound;
 
 	const float fLimit = cosf(this->configMaxAngle); 
+	std::vector<unsigned int> closeVertices;
 
 	// in the second pass we now smooth out all tangents and bitangents at the same local position 
 	// if they are not too far off.
@@ -234,12 +236,14 @@ bool CalcTangentsProcess::ProcessMesh( aiMesh* pMesh, unsigned int meshIndex)
 		const aiVector3D& origNorm = pMesh->mNormals[a];
 		const aiVector3D& origTang = pMesh->mTangents[a];
 		const aiVector3D& origBitang = pMesh->mBitangents[a];
-		std::vector<unsigned int> closeVertices;
-		closeVertices.push_back( a);
+		closeVertices.clear();
 
 		// find all vertices close to that position
 		vertexFinder->FindPositions( origPos, posEpsilon, verticesFound);
 
+		closeVertices.reserve (verticesFound.size()+5);
+		closeVertices.push_back( a);
+
 		// look among them for other vertices sharing the same normal and a close-enough tangent/bitangent
 		for( unsigned int b = 0; b < verticesFound.size(); b++)
 		{