assimp.assimp/code/ASELoader.cpp

/*
---------------------------------------------------------------------------
Open Asset Import Library (ASSIMP)
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Copyright (c) 2006-2008, ASSIMP Development Team

All rights reserved.

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  following disclaimer.

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  derived from this software without specific prior
  written permission of the ASSIMP Development Team.

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*/

/** @file Implementation of the ASE importer class */


#include "AssimpPCH.h"

// internal headers
#include "ASELoader.h"
#include "MaterialSystem.h"
#include "StringComparison.h"
#include "TextureTransform.h"

// utilities
#include "fast_atof.h"
#include "qnan.h"

using namespace Assimp;
using namespace Assimp::ASE;

// ------------------------------------------------------------------------------------------------
// Constructor to be privately used by Importer
ASEImporter::ASEImporter()
{
}
// ------------------------------------------------------------------------------------------------
// Destructor, private as well 
ASEImporter::~ASEImporter()
{
}
// ------------------------------------------------------------------------------------------------
// Returns whether the class can handle the format of the given file. 
bool ASEImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler) const
{
	// simple check of file extension is enough for the moment
	std::string::size_type pos = pFile.find_last_of('.');
	// no file extension - can't read
	if( pos == std::string::npos)
		return false;
	std::string extension = pFile.substr( pos);

	// Either ASE or ASK
	return  !(extension.length() < 4 || extension[0] != '.' ||
			  extension[1] != 'a' && extension[1] != 'A' ||
			  extension[2] != 's' && extension[2] != 'S' ||
			  extension[3] != 'e' && extension[3] != 'E' &&
			  extension[3] != 'k' && extension[3] != 'K');
}

// ------------------------------------------------------------------------------------------------
// Setup configuration options
void ASEImporter::SetupProperties(const Importer* pImp)
{
	configRecomputeNormals = (pImp->GetPropertyInteger(
		AI_CONFIG_IMPORT_ASE_RECONSTRUCT_NORMALS,0) ? true : false);
}

// ------------------------------------------------------------------------------------------------
// Imports the given file into the given scene structure. 
void ASEImporter::InternReadFile( 
	const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler)
{
	boost::scoped_ptr<IOStream> file( pIOHandler->Open( pFile, "rb"));

	// Check whether we can read from the file
	if( file.get() == NULL)
		throw new ImportErrorException( "Failed to open ASE file " + pFile + ".");

	size_t fileSize = file->FileSize();

	// allocate storage and copy the contents of the file to a memory buffer
	// (terminate it with zero)
	std::vector<char> mBuffer2(fileSize+1);
	file->Read( &mBuffer2[0], 1, fileSize);
	mBuffer2[fileSize] = '\0';

	this->mBuffer = &mBuffer2[0];
	this->pcScene = pScene;

	// construct an ASE parser and parse the file
	// TODO: clean this up, mParser should be a reference, not a pointer ...
	ASE::Parser parser(this->mBuffer);
	mParser = &parser;
	mParser->Parse();

	// if absolutely no material has been loaded from the file
	// we need to generate a default material
	GenerateDefaultMaterial();

	// process all meshes
	bool tookNormals = false;
	std::vector<aiMesh*> avOutMeshes;
	avOutMeshes.reserve(mParser->m_vMeshes.size()*2);
	for (std::vector<ASE::Mesh>::iterator
		i =  mParser->m_vMeshes.begin();
		i != mParser->m_vMeshes.end();++i)
	{
		if ((*i).bSkip)continue;

		TransformVertices(*i);

		// now we need to create proper meshes from the import we need to 
		// split them by materials, build valid vertex/face lists ...
		BuildUniqueRepresentation(*i);

		// need to generate proper vertex normals if necessary
		if(GenerateNormals(*i))tookNormals = true;

		// convert all meshes to aiMesh objects
		ConvertMeshes(*i,avOutMeshes);
	}
	if (tookNormals)
	{
		DefaultLogger::get()->debug("ASE: Taking normals from the file. Use "
			"the AI_CONFIG_IMPORT_ASE_RECONSTRUCT_NORMALS option if you "
			"experience problems");
	}

	// now build the output mesh list. remove dummies
	pScene->mNumMeshes = (unsigned int)avOutMeshes.size();
	aiMesh** pp = pScene->mMeshes = new aiMesh*[pScene->mNumMeshes];
	for (std::vector<aiMesh*>::const_iterator
		i =  avOutMeshes.begin();
		i != avOutMeshes.end();++i)
	{
		if (!(*i)->mNumFaces)continue;
		*pp++ = *i;
	}
	pScene->mNumMeshes = (unsigned int)(pp - pScene->mMeshes);

	// buil final material indices (remove submaterials and make the final list)
	BuildMaterialIndices();

	// build the final node graph
	BuildNodes();

	// build output animations
	BuildAnimations();

	// build output cameras
	BuildCameras();

	// build output lights
	BuildLights();
}
// ------------------------------------------------------------------------------------------------
void ASEImporter::GenerateDefaultMaterial()
{
	ai_assert(NULL != mParser);

	bool bHas = false;
	for (std::vector<ASE::Mesh>::iterator
		i =  mParser->m_vMeshes.begin();
		i != mParser->m_vMeshes.end();++i)
	{
		if ((*i).bSkip)continue;
		if (ASE::Face::DEFAULT_MATINDEX == (*i).iMaterialIndex)
		{
			(*i).iMaterialIndex = (unsigned int)mParser->m_vMaterials.size();
			bHas = true;
		}
	}
	if (bHas || mParser->m_vMaterials.empty())
	{
		// add a simple material without submaterials to the parser's list
		mParser->m_vMaterials.push_back ( ASE::Material() );
		ASE::Material& mat = mParser->m_vMaterials.back();

		mat.mDiffuse  = aiColor3D(0.6f,0.6f,0.6f);
		mat.mSpecular = aiColor3D(1.0f,1.0f,1.0f);
		mat.mAmbient  = aiColor3D(0.05f,0.05f,0.05f);
		mat.mShading  = Dot3DSFile::Gouraud;
		mat.mName     = AI_DEFAULT_MATERIAL_NAME;
	}
}

// ------------------------------------------------------------------------------------------------
void ASEImporter::BuildAnimations()
{
	// check whether we have at least one mesh which has animations
	std::vector<ASE::Mesh>::iterator i =  mParser->m_vMeshes.begin();
	unsigned int iNum = 0;
	for (;i != mParser->m_vMeshes.end();++i)
	{
		if ((*i).bSkip)continue;
		if ((*i).mAnim.akeyPositions.size() > 1 || (*i).mAnim.akeyRotations.size() > 1)
			++iNum;
	}
	if (iNum)
	{
		// Generate a new animation channel and setup everything for it
		pcScene->mNumAnimations = 1;
		pcScene->mAnimations = new aiAnimation*[1];
		aiAnimation* pcAnim = pcScene->mAnimations[0] = new aiAnimation();
		pcAnim->mNumChannels = iNum;
		pcAnim->mChannels = new aiNodeAnim*[iNum];
		pcAnim->mTicksPerSecond = mParser->iFrameSpeed * mParser->iTicksPerFrame;

		iNum = 0;
		i =  mParser->m_vMeshes.begin();

		// Now iterate through all meshes and collect all data we can find
		for (;i != mParser->m_vMeshes.end();++i)
		{
			if ((*i).bSkip)continue; // mesh unreferenced?
			if ((*i).mAnim.akeyPositions.size() > 1 || (*i).mAnim.akeyRotations.size() > 1)
			{
				// Begin a new node animation channel for this node
				aiNodeAnim* pcNodeAnim = pcAnim->mChannels[iNum++] = new aiNodeAnim();
				pcNodeAnim->mNodeName.Set((*i).mName);

				// copy position keys
				if ((*i).mAnim.akeyPositions.size() > 1 )
				{
					// Allocate the key array and fill it
					pcNodeAnim->mNumPositionKeys = (unsigned int) (*i).mAnim.akeyPositions.size();
					pcNodeAnim->mPositionKeys = new aiVectorKey[pcNodeAnim->mNumPositionKeys];

					::memcpy(pcNodeAnim->mPositionKeys,&(*i).mAnim.akeyPositions[0],
						pcNodeAnim->mNumPositionKeys * sizeof(aiVectorKey));

					// get the longest node anim here
					for (unsigned int qq = 0; qq < pcNodeAnim->mNumPositionKeys;++qq)
					{
						pcAnim->mDuration = std::max(pcAnim->mDuration,
							pcNodeAnim->mPositionKeys[qq].mTime);
					}
				}
				// copy rotation keys
				if ((*i).mAnim.akeyRotations.size() > 1 )
				{
					// Allocate the key array and fill it
					pcNodeAnim->mNumRotationKeys = (unsigned int) (*i).mAnim.akeyPositions.size();
					pcNodeAnim->mRotationKeys = new aiQuatKey[pcNodeAnim->mNumPositionKeys];

					::memcpy(pcNodeAnim->mRotationKeys,&(*i).mAnim.akeyRotations[0],
						pcNodeAnim->mNumRotationKeys * sizeof(aiQuatKey));

					// get the longest node anim here
					for (unsigned int qq = 0; qq < pcNodeAnim->mNumRotationKeys;++qq)
					{
						pcAnim->mDuration = std::max(pcAnim->mDuration,
							pcNodeAnim->mRotationKeys[qq].mTime);
					}
				}
				// there are no scaling keys
			}
		}
	}
}

// ------------------------------------------------------------------------------------------------
void ASEImporter::BuildCameras()
{
	if (!mParser->m_vCameras.empty())
	{
		pcScene->mNumCameras = (unsigned int)mParser->m_vCameras.size();
		pcScene->mCameras = new aiCamera*[pcScene->mNumCameras];

		for (unsigned int i = 0; i < pcScene->mNumCameras;++i)
		{
			aiCamera* out   = pcScene->mCameras[i] = new aiCamera();
			ASE::Camera& in = mParser->m_vCameras[i];

			// copy members
			out->mClipPlaneFar  = in.mFar;
			out->mClipPlaneNear = (in.mNear ? in.mNear : 0.1f); 
			out->mHorizontalFOV = in.mFOV;

			out->mName.Set(in.mName);
		}
	}
}

// ------------------------------------------------------------------------------------------------
void ASEImporter::BuildLights()
{
	if (!mParser->m_vLights.empty())
	{
		pcScene->mNumLights = (unsigned int)mParser->m_vLights.size();
		pcScene->mLights    = new aiLight*[pcScene->mNumLights];

		for (unsigned int i = 0; i < pcScene->mNumLights;++i)
		{
			aiLight* out   = pcScene->mLights[i] = new aiLight();
			ASE::Light& in = mParser->m_vLights[i];

			out->mName.Set(in.mName);
			out->mType = aiLightSource_POINT;
			out->mColorDiffuse = out->mColorSpecular = in.mColor * in.mIntensity;
		}
	}
}

// ------------------------------------------------------------------------------------------------
void ASEImporter::AddNodes(std::vector<BaseNode*>& nodes,
	aiNode* pcParent,const char* szName)
{
	aiMatrix4x4 m;
	this->AddNodes(nodes,pcParent,szName,m);
}

// ------------------------------------------------------------------------------------------------
void ASEImporter::AddMeshes(const ASE::BaseNode* snode,aiNode* node)
{
	for (unsigned int i = 0; i < pcScene->mNumMeshes;++i)
	{
		// Get the name of the mesh (the mesh instance has been temporarily
		// stored in the third vertex color)
		const aiMesh* pcMesh  = pcScene->mMeshes[i];
		const ASE::Mesh* mesh = (const ASE::Mesh*)pcMesh->mColors[2];

		if (mesh == snode)++node->mNumMeshes;
	}

	if(node->mNumMeshes)
	{
		node->mMeshes = new unsigned int[node->mNumMeshes];
		for (unsigned int i = 0, p = 0; i < pcScene->mNumMeshes;++i)
		{
			const aiMesh* pcMesh  = pcScene->mMeshes[i];
			const ASE::Mesh* mesh = (const ASE::Mesh*)pcMesh->mColors[2];
			if (mesh == snode)
			{
				node->mMeshes[p++] = i;

				// Transform all vertices of the mesh back into their local space -> 
				// at the moment they are pretransformed
				aiMatrix4x4 m  = mesh->mTransform;
				m.Inverse();

				aiVector3D* pvCurPtr = pcMesh->mVertices;
				const aiVector3D* pvEndPtr = pvCurPtr + pcMesh->mNumVertices;
				while (pvCurPtr != pvEndPtr)
				{
					*pvCurPtr = m * (*pvCurPtr);
					pvCurPtr++;
				}

				// Do the same for the normal vectors if we have them
				// Here we need to use the (Inverse)Transpose of a 3x3
				// matrix without the translational component.
				if (pcMesh->mNormals)
				{
					aiMatrix3x3 m3 = aiMatrix3x3( mesh->mTransform );
					m3.Transpose();

					pvCurPtr = pcMesh->mNormals;
					pvEndPtr = pvCurPtr + pcMesh->mNumVertices;
					while (pvCurPtr != pvEndPtr)
					{
						*pvCurPtr = m3 * (*pvCurPtr);
						pvCurPtr++;
					}
				}
			}
		}
	}
}

// ------------------------------------------------------------------------------------------------
void ASEImporter::AddNodes (std::vector<BaseNode*>& nodes,
	aiNode* pcParent, const char* szName,
	const aiMatrix4x4& mat)
{
	const size_t len = szName ? ::strlen(szName) : 0;
	ai_assert(4 <= AI_MAX_NUMBER_OF_COLOR_SETS);

	// Receives child nodes for the pcParent node
	std::vector<aiNode*> apcNodes;

	// Now iterate through all nodes in the scene and search for one
	// which has *us* as parent.
	for (std::vector<BaseNode*>::const_iterator it = nodes.begin(), end = nodes.end();
		 it != end; ++it)
	{
		const BaseNode* snode = *it;
		if (szName)
		{
			if (len != snode->mParent.length() || ::strcmp(szName,snode->mParent.c_str()))
				continue;
		}
		else if (snode->mParent.length())
			continue;

		(*it)->mProcessed = true;

		// Allocate a new node and add it to the output data structure
		apcNodes.push_back(new aiNode());
		aiNode* node = apcNodes.back();

		node->mName.Set((snode->mName.length() ? snode->mName.c_str() : "Unnamed_Node"));
		node->mParent = pcParent;

		// Setup the transformation matrix of the node
		aiMatrix4x4 mParentAdjust  = mat;
		mParentAdjust.Inverse();
		node->mTransformation = mParentAdjust*snode->mTransform;

		// If the type of this node is "Mesh" we need to search
		// the list of output meshes in the data structure for
		// all those that belonged to this node once. This is
		// slightly inconvinient here and a better solution should
		// be used when this code is refactored next.
		if (snode->mType == BaseNode::Mesh)
		{
			AddMeshes(snode,node);
		}

		// add sub nodes
		aiMatrix4x4 mNewAbs = mat * node->mTransformation;

		// prevent stack overflow
		if (node->mName != node->mParent->mName)
		{
			AddNodes(nodes,node,node->mName.data,mNewAbs);
		}
	}

	// allocate enough space for the child nodes
	pcParent->mNumChildren = (unsigned int)apcNodes.size();
	pcParent->mChildren = new aiNode*[apcNodes.size()];

	// now build all nodes for our nice new children
	for (unsigned int p = 0; p < apcNodes.size();++p)
	{
		pcParent->mChildren[p] = apcNodes[p];
	}
	return;
}

// ------------------------------------------------------------------------------------------------
void ASEImporter::BuildNodes()
{
	ai_assert(NULL != pcScene);

	// allocate the one and only root node
	pcScene->mRootNode = new aiNode();
	pcScene->mRootNode->mNumMeshes = 0;
	pcScene->mRootNode->mMeshes = 0;
	pcScene->mRootNode->mName.Set("<root>");

	// generate a full list of all scenegraph elements we have
	std::vector<BaseNode*> nodes;
	nodes.reserve(mParser->m_vMeshes.size() +mParser->m_vLights.size()
		+ mParser->m_vCameras.size());

	for (std::vector<ASE::Light>::iterator it = mParser->m_vLights.begin(), 
		 end = mParser->m_vLights.end();it != end; ++it)nodes.push_back(&(*it));

	for (std::vector<ASE::Camera>::iterator it = mParser->m_vCameras.begin(), 
		 end = mParser->m_vCameras.end();it != end; ++it)nodes.push_back(&(*it));

	for (std::vector<ASE::Mesh>::iterator it = mParser->m_vMeshes.begin(),
		end = mParser->m_vMeshes.end();it != end; ++it)nodes.push_back(&(*it));

	// add all nodes
	AddNodes(nodes,pcScene->mRootNode,NULL);

	// now iterate through al nodes and find those that have not yet
	// been added to the nodegraph (= their parent could not be recognized)
	std::vector<const BaseNode*> aiList;
	for (std::vector<BaseNode*>::iterator it = nodes.begin(), end = nodes.end();
		 it != end; ++it)
	{
		if ((*it)->mProcessed)continue;

		// check whether our parent is known
		bool bKnowParent = false;
		
		// research the list, beginning from now and try to find out whether
		// there is a node that references *us* as a parent
		for (std::vector<BaseNode*>::const_iterator it2 = nodes.begin();
			 it2 != end; ++it2)
		{
			if (it2 == it)continue;

			if ((*it2)->mName == (*it)->mParent)
			{
				bKnowParent = true;
				break;
			}
		}
		if (!bKnowParent)
		{
			aiList.push_back(*it);
		}
	}

	// Are there ane orphaned nodes?
	if (!aiList.empty())
	{
		std::vector<aiNode*> apcNodes;
		apcNodes.reserve(aiList.size() + pcScene->mRootNode->mNumChildren);

		for (unsigned int i = 0; i < pcScene->mRootNode->mNumChildren;++i)
			apcNodes.push_back(pcScene->mRootNode->mChildren[i]);

		delete[] pcScene->mRootNode->mChildren;
		for (std::vector<const BaseNode*>::/*const_*/iterator
			i =  aiList.begin();
			i != aiList.end();++i)
		{
			const ASE::BaseNode* src = *i;

			// the parent is not known, so we can assume that we must add 
			// this node to the root node of the whole scene
			aiNode* pcNode = new aiNode();
			pcNode->mParent = pcScene->mRootNode;
			pcNode->mName.Set(src->mName);
			AddMeshes(src,pcNode);
			AddNodes(nodes,pcNode,pcNode->mName.data);
			apcNodes.push_back(pcNode);
		}

		// Regenerate our output array
		pcScene->mRootNode->mChildren = new aiNode*[apcNodes.size()];
		for (unsigned int i = 0; i < apcNodes.size();++i)
			pcScene->mRootNode->mChildren[i] = apcNodes[i];

		pcScene->mRootNode->mNumChildren = (unsigned int)apcNodes.size();
	}

	// Reset the third color set to NULL - we used this field to
	// store a temporary pointer
	for (unsigned int i = 0; i < pcScene->mNumMeshes;++i)
		pcScene->mMeshes[i]->mColors[2] = NULL;

	// if there is only one subnode, set it as root node
	if (1 == pcScene->mRootNode->mNumChildren)
	{
		aiNode* pc = pcScene->mRootNode;
		pcScene->mRootNode = pcScene->mRootNode->mChildren[0];
		pcScene->mRootNode->mParent = NULL;

		// make sure the destructor won't delete us ...
		delete[] pc->mChildren;
		pc->mChildren = NULL;
		pc->mNumChildren = 0;
		delete pc;
	}
	// The root node should not have at least one child or the file is invalid
	else if (!pcScene->mRootNode->mNumChildren)
	{
		throw new ImportErrorException("No nodes loaded. The ASE/ASK file is either empty or corrupt");
	}
	return;
}

// ------------------------------------------------------------------------------------------------
void ASEImporter::TransformVertices(ASE::Mesh& mesh)
{
	// the matrix data is stored in column-major format,
	// but we need row major
	mesh.mTransform.Transpose();
}

// ------------------------------------------------------------------------------------------------
void ASEImporter::BuildUniqueRepresentation(ASE::Mesh& mesh)
{
	// allocate output storage
	std::vector<aiVector3D> mPositions;
	std::vector<aiVector3D> amTexCoords[AI_MAX_NUMBER_OF_TEXTURECOORDS];
	std::vector<aiColor4D>  mVertexColors;
	std::vector<aiVector3D> mNormals;
	std::vector<BoneVertex> mBoneVertices;

	unsigned int iSize = (unsigned int)mesh.mFaces.size() * 3;
	mPositions.resize(iSize);

	// optional texture coordinates
	for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS;++i)
	{
		if (!mesh.amTexCoords[i].empty())
		{
			amTexCoords[i].resize(iSize);
		}
	}
	// optional vertex colors
	if (!mesh.mVertexColors.empty())
	{
		mVertexColors.resize(iSize);
	}

	// optional vertex normals (vertex normals can simply be copied)
	if (!mesh.mNormals.empty())
	{
		mNormals.resize(iSize);
	}
	// bone vertices. There is no need to change the bone list
	if (!mesh.mBoneVertices.empty())
	{
		mBoneVertices.resize(iSize);
	}

	// iterate through all faces in the mesh
	unsigned int iCurrent = 0;
	for (std::vector<ASE::Face>::iterator
		i =  mesh.mFaces.begin();
		i != mesh.mFaces.end();++i)
	{
		for (unsigned int n = 0; n < 3;++n,++iCurrent)
		{
			mPositions[iCurrent] = mesh.mPositions[(*i).mIndices[n]];
			//std::swap((float&)mPositions[iCurrent].z,(float&)mPositions[iCurrent].y); // DX-to-OGL
			mPositions[iCurrent].y *= -1.f;

			// add texture coordinates
			for (unsigned int c = 0; c < AI_MAX_NUMBER_OF_TEXTURECOORDS;++c)
			{
				if (!mesh.amTexCoords[c].empty())
				{
					amTexCoords[c][iCurrent] = mesh.amTexCoords[c][(*i).amUVIndices[c][n]];
					amTexCoords[c][iCurrent].y = 1.0f - amTexCoords[c][iCurrent].y; // DX-to-OGL
				}
			}
			// add vertex colors
			if (!mesh.mVertexColors.empty())
			{
				mVertexColors[iCurrent] = mesh.mVertexColors[(*i).mColorIndices[n]];
			}
			// add normal vectors
			if (!mesh.mNormals.empty())
			{
				mNormals[iCurrent] = mesh.mNormals[(*i).mIndices[n]];
				mNormals[iCurrent].Normalize();

				//std::swap((float&)mNormals[iCurrent].z,(float&)mNormals[iCurrent].y); // DX-to-OGL
				mNormals[iCurrent].y *= -1.0f;
			}

			// handle bone vertices
			if ((*i).mIndices[n] < mesh.mBoneVertices.size())
			{
				// (sometimes this will cause bone verts to be duplicated
				//  however, I' quite sure Schrompf' JoinVerticesStep
				//  will fix that again ...)
				mBoneVertices[iCurrent] =  mesh.mBoneVertices[(*i).mIndices[n]];
			}
		}
		// we need to flip the order of the indices
		(*i).mIndices[0] = iCurrent-1;
		(*i).mIndices[1] = iCurrent-2;
		(*i).mIndices[2] = iCurrent-3;
	}

	// replace the old arrays
	mesh.mNormals = mNormals;
	mesh.mPositions = mPositions;
	mesh.mVertexColors = mVertexColors;

	for (unsigned int c = 0; c < AI_MAX_NUMBER_OF_TEXTURECOORDS;++c)
		mesh.amTexCoords[c] = amTexCoords[c];
	return;
}

// ------------------------------------------------------------------------------------------------
void ASEImporter::ConvertMaterial(ASE::Material& mat)
{
	// allocate the output material
	mat.pcInstance = new MaterialHelper();

	// At first add the base ambient color of the
	// scene to	the material
	mat.mAmbient.r += this->mParser->m_clrAmbient.r;
	mat.mAmbient.g += this->mParser->m_clrAmbient.g;
	mat.mAmbient.b += this->mParser->m_clrAmbient.b;

	aiString name;
	name.Set( mat.mName);
	mat.pcInstance->AddProperty( &name, AI_MATKEY_NAME);

	// material colors
	mat.pcInstance->AddProperty( &mat.mAmbient, 1, AI_MATKEY_COLOR_AMBIENT);
	mat.pcInstance->AddProperty( &mat.mDiffuse, 1, AI_MATKEY_COLOR_DIFFUSE);
	mat.pcInstance->AddProperty( &mat.mSpecular, 1, AI_MATKEY_COLOR_SPECULAR);
	mat.pcInstance->AddProperty( &mat.mEmissive, 1, AI_MATKEY_COLOR_EMISSIVE);

	// shininess
	if (0.0f != mat.mSpecularExponent && 0.0f != mat.mShininessStrength)
	{
		mat.pcInstance->AddProperty( &mat.mSpecularExponent, 1, AI_MATKEY_SHININESS);
		mat.pcInstance->AddProperty( &mat.mShininessStrength, 1, AI_MATKEY_SHININESS_STRENGTH);
	}
	// if there is no shininess, we can disable phong lighting
	else if (Dot3DS::Dot3DSFile::Metal == mat.mShading ||
		Dot3DS::Dot3DSFile::Phong == mat.mShading ||
		Dot3DS::Dot3DSFile::Blinn == mat.mShading)
	{
		mat.mShading = Dot3DS::Dot3DSFile::Gouraud;
	}

	// opacity
	mat.pcInstance->AddProperty<float>( &mat.mTransparency,1,AI_MATKEY_OPACITY);


	// shading mode
	aiShadingMode eShading = aiShadingMode_NoShading;
	switch (mat.mShading)
	{
		case Dot3DS::Dot3DSFile::Flat:
			eShading = aiShadingMode_Flat; break;
		case Dot3DS::Dot3DSFile::Phong :
			eShading = aiShadingMode_Phong; break;
		case Dot3DS::Dot3DSFile::Blinn :
			eShading = aiShadingMode_Blinn; break;

		// I don't know what "Wire" shading should be,
		// assume it is simple lambertian diffuse (L dot N) shading
		case Dot3DS::Dot3DSFile::Wire:
		case Dot3DS::Dot3DSFile::Gouraud:
			eShading = aiShadingMode_Gouraud; break;
		case Dot3DS::Dot3DSFile::Metal :
			eShading = aiShadingMode_CookTorrance; break;
	}
	mat.pcInstance->AddProperty<int>( (int*)&eShading,1,AI_MATKEY_SHADING_MODEL);

	if (Dot3DS::Dot3DSFile::Wire == mat.mShading)
	{
		// set the wireframe flag
		unsigned int iWire = 1;
		mat.pcInstance->AddProperty<int>( (int*)&iWire,1,AI_MATKEY_ENABLE_WIREFRAME);
	}

	// texture, if there is one
	if( mat.sTexDiffuse.mMapName.length() > 0)
	{
		aiString tex;
		tex.Set( mat.sTexDiffuse.mMapName);
		mat.pcInstance->AddProperty( &tex, AI_MATKEY_TEXTURE_DIFFUSE(0));

		if (is_not_qnan(mat.sTexDiffuse.mTextureBlend))
			mat.pcInstance->AddProperty<float>( &mat.sTexDiffuse.mTextureBlend, 1, 
			AI_MATKEY_TEXBLEND_DIFFUSE(0));
	}
	if( mat.sTexSpecular.mMapName.length() > 0)
	{
		aiString tex;
		tex.Set( mat.sTexSpecular.mMapName);
		mat.pcInstance->AddProperty( &tex, AI_MATKEY_TEXTURE_SPECULAR(0));

		if (is_not_qnan(mat.sTexSpecular.mTextureBlend))
			mat.pcInstance->AddProperty<float>( &mat.sTexSpecular.mTextureBlend, 1,
			AI_MATKEY_TEXBLEND_SPECULAR(0));
	}
	if( mat.sTexOpacity.mMapName.length() > 0)
	{
		aiString tex;
		tex.Set( mat.sTexOpacity.mMapName);
		mat.pcInstance->AddProperty( &tex, AI_MATKEY_TEXTURE_OPACITY(0));

		if (is_not_qnan(mat.sTexOpacity.mTextureBlend))
			mat.pcInstance->AddProperty<float>( &mat.sTexOpacity.mTextureBlend, 1,
			AI_MATKEY_TEXBLEND_OPACITY(0));
	}
	if( mat.sTexEmissive.mMapName.length() > 0)
	{
		aiString tex;
		tex.Set( mat.sTexEmissive.mMapName);
		mat.pcInstance->AddProperty( &tex, AI_MATKEY_TEXTURE_EMISSIVE(0));

		if (is_not_qnan(mat.sTexEmissive.mTextureBlend))
			mat.pcInstance->AddProperty<float>( &mat.sTexEmissive.mTextureBlend, 1, 
			AI_MATKEY_TEXBLEND_EMISSIVE(0));
	}
	if( mat.sTexAmbient.mMapName.length() > 0)
	{
		aiString tex;
		tex.Set( mat.sTexAmbient.mMapName);
		mat.pcInstance->AddProperty( &tex, AI_MATKEY_TEXTURE_AMBIENT(0));

		if (is_not_qnan(mat.sTexAmbient.mTextureBlend))
			mat.pcInstance->AddProperty<float>( &mat.sTexAmbient.mTextureBlend, 1, 
			AI_MATKEY_TEXBLEND_AMBIENT(0));
	}
	if( mat.sTexBump.mMapName.length() > 0)
	{
		aiString tex;
		tex.Set( mat.sTexBump.mMapName);
		mat.pcInstance->AddProperty( &tex, AI_MATKEY_TEXTURE_HEIGHT(0));

		if (is_not_qnan(mat.sTexBump.mTextureBlend))
			mat.pcInstance->AddProperty<float>( &mat.sTexBump.mTextureBlend, 1,
			AI_MATKEY_TEXBLEND_HEIGHT(0));
	}
	if( mat.sTexShininess.mMapName.length() > 0)
	{
		aiString tex;
		tex.Set( mat.sTexShininess.mMapName);
		mat.pcInstance->AddProperty( &tex, AI_MATKEY_TEXTURE_SHININESS(0));

		if (is_not_qnan(mat.sTexShininess.mTextureBlend))
			mat.pcInstance->AddProperty<float>( &mat.sTexBump.mTextureBlend, 1, 
			AI_MATKEY_TEXBLEND_SHININESS(0));
	}

	// store the name of the material itself, too
	if( mat.mName.length() > 0)
	{
		aiString tex;
		tex.Set( mat.mName);
		mat.pcInstance->AddProperty( &tex, AI_MATKEY_NAME);
	}
	return;
}

// ------------------------------------------------------------------------------------------------
void ASEImporter::ConvertMeshes(ASE::Mesh& mesh, std::vector<aiMesh*>& avOutMeshes)
{
	// validate the material index of the mesh
	if (mesh.iMaterialIndex >= mParser->m_vMaterials.size())
	{
		mesh.iMaterialIndex = (unsigned int)mParser->m_vMaterials.size()-1;
		DefaultLogger::get()->warn("Material index is out of range");
	}

	// if the material the mesh is assigned to is consisting of submeshes
	// we'll need to split it ... Quak.
	if (!mParser->m_vMaterials[mesh.iMaterialIndex].avSubMaterials.empty())
	{
		std::vector<ASE::Material> vSubMaterials = mParser->
			m_vMaterials[mesh.iMaterialIndex].avSubMaterials;

		std::vector<unsigned int>* aiSplit = new std::vector<unsigned int>[
			vSubMaterials.size()];

		// build a list of all faces per submaterial
		for (unsigned int i = 0; i < mesh.mFaces.size();++i)
		{
			// check range
			if (mesh.mFaces[i].iMaterial >= vSubMaterials.size())
				{
					DefaultLogger::get()->warn("Submaterial index is out of range");

					// use the last material instead
					aiSplit[vSubMaterials.size()-1].push_back(i);
				}
			else aiSplit[mesh.mFaces[i].iMaterial].push_back(i);
		}

		// now generate submeshes
		for (unsigned int p = 0; p < vSubMaterials.size();++p)
		{
			if (!aiSplit[p].empty())
			{
				aiMesh* p_pcOut = new aiMesh();
				p_pcOut->mPrimitiveTypes = aiPrimitiveType_TRIANGLE;

				// let the sub material index
				p_pcOut->mMaterialIndex = p;

				// we will need this material
				mParser->m_vMaterials[mesh.iMaterialIndex].avSubMaterials[p].bNeed = true;

				// store the real index here ... color channel 3
				p_pcOut->mColors[3] = (aiColor4D*)(uintptr_t)mesh.iMaterialIndex;

				// store a pointer to the mesh in color channel 2
				p_pcOut->mColors[2] = (aiColor4D*) &mesh;
				avOutMeshes.push_back(p_pcOut);

				// convert vertices
				p_pcOut->mNumVertices = (unsigned int)aiSplit[p].size()*3;
				p_pcOut->mNumFaces = (unsigned int)aiSplit[p].size();

				// receive output vertex weights
				std::vector<std::pair<unsigned int, float> >* avOutputBones;
				if (!mesh.mBones.empty())
				{
					avOutputBones = new std::vector<std::pair<unsigned int, float> >[mesh.mBones.size()];
				}
				
				// allocate enough storage for faces
				p_pcOut->mFaces = new aiFace[p_pcOut->mNumFaces];

				unsigned int iBase = 0,iIndex;
				if (p_pcOut->mNumVertices)
				{
					p_pcOut->mVertices = new aiVector3D[p_pcOut->mNumVertices];
					p_pcOut->mNormals  = new aiVector3D[p_pcOut->mNumVertices];
					for (unsigned int q = 0; q < aiSplit[p].size();++q)
					{
					iIndex = aiSplit[p][q];

						p_pcOut->mFaces[q].mIndices = new unsigned int[3];
						p_pcOut->mFaces[q].mNumIndices = 3;

						for (unsigned int t = 0; t < 3;++t)
						{
							const uint32_t iIndex2 = mesh.mFaces[iIndex].mIndices[t];

							p_pcOut->mVertices[iBase] = mesh.mPositions [iIndex2];
							p_pcOut->mNormals [iBase] = mesh.mNormals   [iIndex2];

							// convert bones, if existing
							if (!mesh.mBones.empty())
							{
								// check whether there is a vertex weight that is using
								// this vertex index ...
								if (iIndex2 < mesh.mBoneVertices.size())
								{
									for (std::vector<std::pair<int,float> >::const_iterator
										blubb =  mesh.mBoneVertices[iIndex2].mBoneWeights.begin();
										blubb != mesh.mBoneVertices[iIndex2].mBoneWeights.end();++blubb)
									{
										// NOTE: illegal cases have already been filtered out
										avOutputBones[(*blubb).first].push_back(std::pair<unsigned int, float>(
											iBase,(*blubb).second));
									}
								}
							}
							++iBase;
						}

						// Flip the face order 
						p_pcOut->mFaces[q].mIndices[0] = iBase-3;
						p_pcOut->mFaces[q].mIndices[1] = iBase-2;
						p_pcOut->mFaces[q].mIndices[2] = iBase-1;
					}
				}
				// convert texture coordinates (up to AI_MAX_NUMBER_OF_TEXTURECOORDS sets supported)
				for (unsigned int c = 0; c < AI_MAX_NUMBER_OF_TEXTURECOORDS;++c)
				{
					if (!mesh.amTexCoords[c].empty())
					{
						p_pcOut->mTextureCoords[c] = new aiVector3D[p_pcOut->mNumVertices];
						iBase = 0;
						for (unsigned int q = 0; q < aiSplit[p].size();++q)
						{
							iIndex = aiSplit[p][q];
							for (unsigned int t = 0; t < 3;++t)
							{
								p_pcOut->mTextureCoords[c][iBase++] = mesh.amTexCoords[c][mesh.mFaces[iIndex].mIndices[t]];
							}
						}
						// setup the number of valid vertex components
						p_pcOut->mNumUVComponents[c] = mesh.mNumUVComponents[c];
					}
				}

				// convert vertex colors (only one set supported)
				if (!mesh.mVertexColors.empty())
				{
					p_pcOut->mColors[0] = new aiColor4D[p_pcOut->mNumVertices];
					iBase = 0;
					for (unsigned int q = 0; q < aiSplit[p].size();++q)
					{
						iIndex = aiSplit[p][q];
						for (unsigned int t = 0; t < 3;++t)
						{
							p_pcOut->mColors[0][iBase++] = mesh.mVertexColors[mesh.mFaces[iIndex].mIndices[t]];
						}
					}
				}
				if (!mesh.mBones.empty())
				{
					p_pcOut->mNumBones = 0;
					for (unsigned int mrspock = 0; mrspock < mesh.mBones.size();++mrspock)
						if (!avOutputBones[mrspock].empty())p_pcOut->mNumBones++;

					p_pcOut->mBones = new aiBone* [ p_pcOut->mNumBones ];
					aiBone** pcBone = p_pcOut->mBones;
					for (unsigned int mrspock = 0; mrspock < mesh.mBones.size();++mrspock)
					{
						if (!avOutputBones[mrspock].empty())
						{
							// we will need this bone. add it to the output mesh and
							// add all per-vertex weights
							aiBone* pc = *pcBone = new aiBone();
							pc->mName.Set(mesh.mBones[mrspock].mName);

							pc->mNumWeights = (unsigned int)avOutputBones[mrspock].size();
							pc->mWeights = new aiVertexWeight[pc->mNumWeights];

							for (unsigned int captainkirk = 0; captainkirk < pc->mNumWeights;++captainkirk)
							{
								const std::pair<unsigned int,float>& ref = avOutputBones[mrspock][captainkirk];
								pc->mWeights[captainkirk].mVertexId = ref.first;
								pc->mWeights[captainkirk].mWeight = ref.second;
							}
							++pcBone;
						}
					}
					// delete allocated storage
					delete[] avOutputBones;
				}
			}
		}
		// delete storage
		delete[] aiSplit;
	}
	else
	{
		// Otherwise we can simply copy the data to one output mesh
		// This codepath needs less memory and uses fast memcpy()s
		// to do the actual copying. So I think it is worth the 
		// effort here.

		aiMesh* p_pcOut = new aiMesh();
		p_pcOut->mPrimitiveTypes = aiPrimitiveType_TRIANGLE;

		// set an empty sub material index
		p_pcOut->mMaterialIndex = ASE::Face::DEFAULT_MATINDEX;
		mParser->m_vMaterials[mesh.iMaterialIndex].bNeed = true;

		// store the real index here ... in color channel 3
		p_pcOut->mColors[3] = (aiColor4D*)(uintptr_t)mesh.iMaterialIndex;

		// store a pointer to the mesh in color channel 2
		p_pcOut->mColors[2] = (aiColor4D*) &mesh;
		avOutMeshes.push_back(p_pcOut);

		// if the mesh hasn't faces or vertices, there are two cases
		// possible: 1. the model is invalid. 2. This is a dummy
		// helper object which we are going to remove later ...
		if (mesh.mFaces.empty() || mesh.mPositions.empty())
		{
			return;
		}

		// convert vertices
		p_pcOut->mNumVertices = (unsigned int)mesh.mPositions.size();
		p_pcOut->mNumFaces = (unsigned int)mesh.mFaces.size();

		// allocate enough storage for faces
		p_pcOut->mFaces = new aiFace[p_pcOut->mNumFaces];

		// copy vertices
		p_pcOut->mVertices = new aiVector3D[mesh.mPositions.size()];
		memcpy(p_pcOut->mVertices,&mesh.mPositions[0],
			mesh.mPositions.size() * sizeof(aiVector3D));

		// copy normals
		p_pcOut->mNormals = new aiVector3D[mesh.mNormals.size()];
		memcpy(p_pcOut->mNormals,&mesh.mNormals[0],
			mesh.mNormals.size() * sizeof(aiVector3D));

		// copy texture coordinates
		for (unsigned int c = 0; c < AI_MAX_NUMBER_OF_TEXTURECOORDS;++c)
		{
			if (!mesh.amTexCoords[c].empty())
			{
				p_pcOut->mTextureCoords[c] = new aiVector3D[mesh.amTexCoords[c].size()];
				memcpy(p_pcOut->mTextureCoords[c],&mesh.amTexCoords[c][0],
					mesh.amTexCoords[c].size() * sizeof(aiVector3D));

				// setup the number of valid vertex components
				p_pcOut->mNumUVComponents[c] = mesh.mNumUVComponents[c];
			}
		}

		// copy vertex colors
		if (!mesh.mVertexColors.empty())
		{
			p_pcOut->mColors[0] = new aiColor4D[mesh.mVertexColors.size()];
			memcpy(p_pcOut->mColors[0],&mesh.mVertexColors[0],
				mesh.mVertexColors.size() * sizeof(aiColor4D));
		}

		// copy faces
		for (unsigned int iFace = 0; iFace < p_pcOut->mNumFaces;++iFace)
		{
			p_pcOut->mFaces[iFace].mNumIndices = 3;
			p_pcOut->mFaces[iFace].mIndices = new unsigned int[3];

			// copy indices (flip the face order, too)
			p_pcOut->mFaces[iFace].mIndices[0] = mesh.mFaces[iFace].mIndices[2];
			p_pcOut->mFaces[iFace].mIndices[1] = mesh.mFaces[iFace].mIndices[1];
			p_pcOut->mFaces[iFace].mIndices[2] = mesh.mFaces[iFace].mIndices[0];
		}

		// copy vertex bones
		if (!mesh.mBones.empty() && !mesh.mBoneVertices.empty())
		{
			std::vector<aiVertexWeight>* avBonesOut = new
				std::vector<aiVertexWeight>[mesh.mBones.size()];

			// find all vertex weights for this bone
			unsigned int quak = 0;
			for (std::vector<BoneVertex>::const_iterator
				harrypotter =  mesh.mBoneVertices.begin();
				harrypotter != mesh.mBoneVertices.end();++harrypotter,++quak)
			{
				for (std::vector<std::pair<int,float> >::const_iterator
					ronaldweasley  = (*harrypotter).mBoneWeights.begin();
					ronaldweasley != (*harrypotter).mBoneWeights.end();++ronaldweasley)
				{
					aiVertexWeight weight;
					weight.mVertexId = quak;
					weight.mWeight = (*ronaldweasley).second;
					avBonesOut[(*ronaldweasley).first].push_back(weight);
				}
			}

			// now build a final bone list
			p_pcOut->mNumBones = 0;
			for (unsigned int jfkennedy = 0; jfkennedy < mesh.mBones.size();++jfkennedy)
				if (!avBonesOut[jfkennedy].empty())p_pcOut->mNumBones++;

			p_pcOut->mBones = new aiBone*[p_pcOut->mNumBones];
			aiBone** pcBone = p_pcOut->mBones;
			for (unsigned int jfkennedy = 0; jfkennedy < mesh.mBones.size();++jfkennedy)
			{
				if (!avBonesOut[jfkennedy].empty())
				{
					aiBone* pc = *pcBone = new aiBone();
					pc->mName.Set(mesh.mBones[jfkennedy].mName);
					pc->mNumWeights = (unsigned int)avBonesOut[jfkennedy].size();
					pc->mWeights = new aiVertexWeight[pc->mNumWeights];
					::memcpy(pc->mWeights,&avBonesOut[jfkennedy][0],
						sizeof(aiVertexWeight) * pc->mNumWeights);
					++pcBone;
				}
			}

			// delete allocated storage
			delete[] avBonesOut;
		}
	}
}

// ------------------------------------------------------------------------------------------------
void ASEImporter::BuildMaterialIndices()
{
	ai_assert(NULL != pcScene);

	// iterate through all materials and check whether we need them
	for (unsigned int iMat = 0; iMat < mParser->m_vMaterials.size();++iMat)
	{
		if (mParser->m_vMaterials[iMat].bNeed)
		{
			// convert it to the aiMaterial layout
			ASE::Material& mat = mParser->m_vMaterials[iMat];
			ConvertMaterial(mat);
			TextureTransform::ApplyScaleNOffset(mat);
			++pcScene->mNumMaterials;
		}
		for (unsigned int iSubMat = 0; iSubMat < mParser->m_vMaterials[
			iMat].avSubMaterials.size();++iSubMat)
		{
			if (mParser->m_vMaterials[iMat].avSubMaterials[iSubMat].bNeed)
			{
				// convert it to the aiMaterial layout
				ASE::Material& mat = mParser->m_vMaterials[iMat].avSubMaterials[iSubMat];
				ConvertMaterial(mat);
				TextureTransform::ApplyScaleNOffset(mat);
				++pcScene->mNumMaterials;
			}
		}
	}

	// allocate the output material array
	pcScene->mMaterials = new aiMaterial*[pcScene->mNumMaterials];
	Dot3DS::Material** pcIntMaterials = new Dot3DS::Material*[pcScene->mNumMaterials];

	unsigned int iNum = 0;
	for (unsigned int iMat = 0; iMat < mParser->m_vMaterials.size();++iMat)
	{
		if (mParser->m_vMaterials[iMat].bNeed)
		{
			ai_assert(NULL != mParser->m_vMaterials[iMat].pcInstance);
			pcScene->mMaterials[iNum] = mParser->m_vMaterials[iMat].pcInstance;

			// store the internal material, too
			pcIntMaterials[iNum] = &mParser->m_vMaterials[iMat];

			// iterate through all meshes and search for one which is using
			// this top-level material index
			for (unsigned int iMesh = 0; iMesh < pcScene->mNumMeshes;++iMesh)
			{
				if (ASE::Face::DEFAULT_MATINDEX == pcScene->mMeshes[iMesh]->mMaterialIndex &&
					iMat == (uintptr_t)pcScene->mMeshes[iMesh]->mColors[3])
				{
					pcScene->mMeshes[iMesh]->mMaterialIndex = iNum;
					pcScene->mMeshes[iMesh]->mColors[3] = NULL;
				}
			}
			iNum++;
		}
		for (unsigned int iSubMat = 0; iSubMat < mParser->m_vMaterials[iMat].avSubMaterials.size();++iSubMat)
		{
			if (mParser->m_vMaterials[iMat].avSubMaterials[iSubMat].bNeed)
			{
				ai_assert(NULL != mParser->m_vMaterials[iMat].avSubMaterials[iSubMat].pcInstance);
				pcScene->mMaterials[iNum] = mParser->m_vMaterials[iMat].
					avSubMaterials[iSubMat].pcInstance;

				// store the internal material, too
				pcIntMaterials[iNum] = &mParser->m_vMaterials[iMat].avSubMaterials[iSubMat];

				// iterate through all meshes and search for one which is using
				// this sub-level material index
				for (unsigned int iMesh = 0; iMesh < pcScene->mNumMeshes;++iMesh)
				{
					if (iSubMat == pcScene->mMeshes[iMesh]->mMaterialIndex &&
						iMat == (uintptr_t)pcScene->mMeshes[iMesh]->mColors[3])
					{
						pcScene->mMeshes[iMesh]->mMaterialIndex = iNum;
						pcScene->mMeshes[iMesh]->mColors[3]     = NULL;
					}
				}
				iNum++;
			}
		}
	}
	// prepare for the next step
	for (unsigned int hans = 0; hans < mParser->m_vMaterials.size();++hans)
		TextureTransform::ApplyScaleNOffset(mParser->m_vMaterials[hans]);

	// now we need to iterate through all meshes,
	// generating correct texture coordinates and material uv indices
	for (unsigned int curie = 0; curie < pcScene->mNumMeshes;++curie)
	{
		aiMesh* pcMesh = pcScene->mMeshes[curie];

		// apply texture coordinate transformations
		TextureTransform::BakeScaleNOffset(pcMesh,pcIntMaterials[pcMesh->mMaterialIndex]);
	}
	for (unsigned int hans = 0; hans < pcScene->mNumMaterials;++hans)
	{
		// setup the correct UV indices for each material
		TextureTransform::SetupMatUVSrc(pcScene->mMaterials[hans],
			pcIntMaterials[hans]);
	}
	delete[] pcIntMaterials;

	// finished!
	return;
}
// ------------------------------------------------------------------------------------------------
// Generate normal vectors basing on smoothing groups
bool ASEImporter::GenerateNormals(ASE::Mesh& mesh)
{
	if (!mesh.mNormals.empty() && !configRecomputeNormals)
	{
		// check whether there are only uninitialized normals. If there are
		// some, skip all normals from the file and compute them on our own
		for (std::vector<aiVector3D>::const_iterator
			qq =  mesh.mNormals.begin();
			qq != mesh.mNormals.end();++qq)
		{
			if ((*qq).x || (*qq).y || (*qq).z)
			{
				return true;
			}
		}
	}
	// The array will be reused
	ComputeNormalsWithSmoothingsGroups<ASE::Face>(mesh);
	return false;
}