ASELoader.cpp

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/** @file  ASELoader.cpp
 *  @brief Implementation of the ASE importer class
 */

#include "AssimpPCH.h"
#ifndef ASSIMP_BUILD_NO_ASE_IMPORTER

// internal headers
#include "ASELoader.h"
#include "StringComparison.h"
#include "SkeletonMeshBuilder.h"
#include "TargetAnimation.h"

// utilities
#include "fast_atof.h"

using namespace Assimp;
using namespace Assimp::ASE;

static const aiImporterDesc desc = {
	"ASE Importer",
	"",
	"",
	"Similar to 3DS but text-encoded",
	aiImporterFlags_SupportTextFlavour,
	0,
	0,
	0,
	0,
	"ase ask" 
};

// ------------------------------------------------------------------------------------------------
// Constructor to be privately used by Importer
ASEImporter::ASEImporter()
: noSkeletonMesh()
{}

// ------------------------------------------------------------------------------------------------
// 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, bool cs) const
{
	// check file extension 
	const std::string extension = GetExtension(pFile);
	
	if( extension == "ase" || extension == "ask")
		return true;

	if ((!extension.length() || cs) && pIOHandler) {
		const char* tokens[] = {"*3dsmax_asciiexport"};
		return SearchFileHeaderForToken(pIOHandler,pFile,tokens,1);
	}
	return false;
}

// ------------------------------------------------------------------------------------------------
// Loader meta information
const aiImporterDesc* ASEImporter::GetInfo () const
{
	return &desc;
}

// ------------------------------------------------------------------------------------------------
// Setup configuration options
void ASEImporter::SetupProperties(const Importer* pImp)
{
	configRecomputeNormals = (pImp->GetPropertyInteger(
		AI_CONFIG_IMPORT_ASE_RECONSTRUCT_NORMALS,1) ? true : false);

	noSkeletonMesh = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_NO_SKELETON_MESHES,0) != 0;
}

// ------------------------------------------------------------------------------------------------
// 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 DeadlyImportError( "Failed to open ASE file " + pFile + ".");
	}

	// Allocate storage and copy the contents of the file to a memory buffer
	std::vector<char> mBuffer2;
	TextFileToBuffer(file.get(),mBuffer2);

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

	// ------------------------------------------------------------------
	// Guess the file format by looking at the extension
	// ASC is considered to be the older format 110,
	// ASE is the actual version 200 (that is currently written by max)
	// ------------------------------------------------------------------
	unsigned int defaultFormat;
	std::string::size_type s = pFile.length()-1;
	switch (pFile.c_str()[s])	{

	case 'C':
	case 'c':
		defaultFormat = AI_ASE_OLD_FILE_FORMAT;
		break;
	default:
		defaultFormat = AI_ASE_NEW_FILE_FORMAT;
	};

	// Construct an ASE parser and parse the file
	ASE::Parser parser(mBuffer,defaultFormat);
	mParser = &parser;
	mParser->Parse();

	//------------------------------------------------------------------
	// Check whether we god at least one mesh. If we did - generate
	// materials and copy meshes. 
	// ------------------------------------------------------------------
	if ( !mParser->m_vMeshes.empty())	{

		// 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;
			}
			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 setting 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);

		// Build final material indices (remove submaterials and setup
		// the final list)
		BuildMaterialIndices();
	}

	// ------------------------------------------------------------------
	// Copy all scene graph nodes - lights, cameras, dummies and meshes
	// into one huge list.
	//------------------------------------------------------------------
	std::vector<BaseNode*> nodes;
	nodes.reserve(mParser->m_vMeshes.size() +mParser->m_vLights.size()
		+ mParser->m_vCameras.size() + mParser->m_vDummies.size());

	// Lights
	for (std::vector<ASE::Light>::iterator it = mParser->m_vLights.begin(), 
		 end = mParser->m_vLights.end();it != end; ++it)nodes.push_back(&(*it));
	// Cameras
	for (std::vector<ASE::Camera>::iterator it = mParser->m_vCameras.begin(), 
		 end = mParser->m_vCameras.end();it != end; ++it)nodes.push_back(&(*it));
	// Meshes
	for (std::vector<ASE::Mesh>::iterator it = mParser->m_vMeshes.begin(),
		end = mParser->m_vMeshes.end();it != end; ++it)nodes.push_back(&(*it));
	// Dummies
	for (std::vector<ASE::Dummy>::iterator it = mParser->m_vDummies.begin(),
		end = mParser->m_vDummies.end();it != end; ++it)nodes.push_back(&(*it));

	// build the final node graph
	BuildNodes(nodes);

	// build output animations
	BuildAnimations(nodes);

	// build output cameras
	BuildCameras();

	// build output lights
	BuildLights();

	// ------------------------------------------------------------------
	// If we have no meshes use the SkeletonMeshBuilder helper class
	// to build a mesh for the animation skeleton
	// FIXME: very strange results
	// ------------------------------------------------------------------
	if (!pScene->mNumMeshes)	{
		pScene->mFlags |= AI_SCENE_FLAGS_INCOMPLETE;
		if (!noSkeletonMesh) {
			SkeletonMeshBuilder skeleton(pScene);
		}
	}
}
// ------------------------------------------------------------------------------------------------
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  = Discreet3DS::Gouraud;
		mat.mName     = AI_DEFAULT_MATERIAL_NAME;
	}
}

// ------------------------------------------------------------------------------------------------
void ASEImporter::BuildAnimations(const std::vector<BaseNode*>& nodes)
{
	// check whether we have at least one mesh which has animations
	std::vector<ASE::BaseNode*>::const_iterator i =  nodes.begin();
	unsigned int iNum = 0;
	for (;i != nodes.end();++i)	{

		// TODO: Implement Bezier & TCB support
		if ((*i)->mAnim.mPositionType != ASE::Animation::TRACK)	{
			DefaultLogger::get()->warn("ASE: Position controller uses Bezier/TCB keys. "
				"This is not supported.");
		}
		if ((*i)->mAnim.mRotationType != ASE::Animation::TRACK)	{
			DefaultLogger::get()->warn("ASE: Rotation controller uses Bezier/TCB keys. "
				"This is not supported.");
		}
		if ((*i)->mAnim.mScalingType != ASE::Animation::TRACK)	{
			DefaultLogger::get()->warn("ASE: Position controller uses Bezier/TCB keys. "
				"This is not supported.");
		}

		// We compare against 1 here - firstly one key is not
		// really an animation and secondly MAX writes dummies
		// that represent the node transformation.
		if ((*i)->mAnim.akeyPositions.size()>1 || (*i)->mAnim.akeyRotations.size()>1 || (*i)->mAnim.akeyScaling.size()>1){
			++iNum;
		}
		if ((*i)->mTargetAnim.akeyPositions.size() > 1 && is_not_qnan( (*i)->mTargetPosition.x )) {
			++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;
		
		// Now iterate through all meshes and collect all data we can find
		for (i =  nodes.begin();i != nodes.end();++i)	{

			ASE::BaseNode* me = *i;
			if ( me->mTargetAnim.akeyPositions.size() > 1 && is_not_qnan( me->mTargetPosition.x ))	{
				// Generate an extra channel for the camera/light target.
				// BuildNodes() does also generate an extra node, named
				// <baseName>.Target.
				aiNodeAnim* nd = pcAnim->mChannels[iNum++] = new aiNodeAnim();
				nd->mNodeName.Set(me->mName + ".Target");

				// If there is no input position channel we will need
				// to supply the default position from the node's
				// local transformation matrix.
				/*TargetAnimationHelper helper;
				if (me->mAnim.akeyPositions.empty())
				{
					aiMatrix4x4& mat = (*i)->mTransform;
					helper.SetFixedMainAnimationChannel(aiVector3D(
						mat.a4, mat.b4, mat.c4));
				}
				else helper.SetMainAnimationChannel (&me->mAnim.akeyPositions);
				helper.SetTargetAnimationChannel (&me->mTargetAnim.akeyPositions);
				
				helper.Process(&me->mTargetAnim.akeyPositions);*/

				// Allocate the key array and fill it
				nd->mNumPositionKeys = (unsigned int) me->mTargetAnim.akeyPositions.size();
				nd->mPositionKeys = new aiVectorKey[nd->mNumPositionKeys];

				::memcpy(nd->mPositionKeys,&me->mTargetAnim.akeyPositions[0],
					nd->mNumPositionKeys * sizeof(aiVectorKey));
			}

			if (me->mAnim.akeyPositions.size() > 1 || me->mAnim.akeyRotations.size() > 1 || me->mAnim.akeyScaling.size() > 1)	{
				// Begin a new node animation channel for this node
				aiNodeAnim* nd = pcAnim->mChannels[iNum++] = new aiNodeAnim();
				nd->mNodeName.Set(me->mName);

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

					::memcpy(nd->mPositionKeys,&me->mAnim.akeyPositions[0],
						nd->mNumPositionKeys * sizeof(aiVectorKey));
				}
				// copy rotation keys
				if (me->mAnim.akeyRotations.size() > 1 )	{
					// Allocate the key array and fill it
					nd->mNumRotationKeys = (unsigned int) me->mAnim.akeyRotations.size();
					nd->mRotationKeys = new aiQuatKey[nd->mNumRotationKeys];

					// --------------------------------------------------------------------
					// Rotation keys are offsets to the previous keys.
					// We have the quaternion representations of all 
					// of them, so we just need to concatenate all
					// (unit-length) quaternions to get the absolute
					// rotations.
					// Rotation keys are ABSOLUTE for older files
					// --------------------------------------------------------------------

					aiQuaternion cur;
					for (unsigned int a = 0; a < nd->mNumRotationKeys;++a)	{
						aiQuatKey q = me->mAnim.akeyRotations[a];

						if (mParser->iFileFormat > 110)	{
							cur = (a ? cur*q.mValue : q.mValue);
							q.mValue = cur.Normalize();
						}
						nd->mRotationKeys[a] = q; 

						// need this to get to Assimp quaternion conventions
						nd->mRotationKeys[a].mValue.w *= -1.f;
					}
				}
				// copy scaling keys
				if (me->mAnim.akeyScaling.size() > 1 )	{
					// Allocate the key array and fill it
					nd->mNumScalingKeys = (unsigned int) me->mAnim.akeyScaling.size();
					nd->mScalingKeys = new aiVectorKey[nd->mNumScalingKeys];

					::memcpy(nd->mScalingKeys,&me->mAnim.akeyScaling[0],
						nd->mNumScalingKeys * sizeof(aiVectorKey));
				}
			}
		}
	}
}

// ------------------------------------------------------------------------------------------------
// Build output cameras
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);
		}
	}
}

// ------------------------------------------------------------------------------------------------
// Build output lights
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];

			// The direction is encoded in the transformation matrix of the node. 
			// In 3DS MAX the light source points into negative Z direction if 
			// the node transformation is the identity. 
			out->mDirection = aiVector3D(0.f,0.f,-1.f);

			out->mName.Set(in.mName);
			switch (in.mLightType)
			{
			case ASE::Light::TARGET:
				out->mType = aiLightSource_SPOT;
				out->mAngleInnerCone = AI_DEG_TO_RAD(in.mAngle);
				out->mAngleOuterCone = (in.mFalloff ? AI_DEG_TO_RAD(in.mFalloff) : out->mAngleInnerCone);
				break;

			case ASE::Light::DIRECTIONAL:
				out->mType = aiLightSource_DIRECTIONAL;
				break;

			default:
			//case ASE::Light::OMNI:
				out->mType = aiLightSource_POINT;
				break;
			};
			out->mColorDiffuse = out->mColorSpecular = in.mColor * in.mIntensity;
		}
	}
}

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

// ------------------------------------------------------------------------------------------------
// Add meshes to a given node
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.
				// As always, inverse transpose.
				if (pcMesh->mNormals)	{
					aiMatrix3x3 m3 = aiMatrix3x3( mesh->mTransform );
					m3.Transpose();

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

// ------------------------------------------------------------------------------------------------
// Add child nodes to a given parent node
void ASEImporter::AddNodes (const 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;

		// Add sub nodes - prevent stack overflow due to recursive parenting
		if (node->mName != node->mParent->mName) {
			AddNodes(nodes,node,node->mName.data,snode->mTransform);
		}

		// Further processing depends on the type of the node
		if (snode->mType == ASE::BaseNode::Mesh)	{
			// 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.
			AddMeshes(snode,node);
		}
		else if (is_not_qnan( snode->mTargetPosition.x ))	{
			// If this is a target camera or light we generate a small
			// child node which marks the position of the camera
			// target (the direction information is contained in *this*
			// node's animation track but the exact target position
			// would be lost otherwise)
			if (!node->mNumChildren)	{
				node->mChildren = new aiNode*[1];
			}

			aiNode* nd = new aiNode();

			nd->mName.Set ( snode->mName + ".Target" );

			nd->mTransformation.a4 = snode->mTargetPosition.x - snode->mTransform.a4;
			nd->mTransformation.b4 = snode->mTargetPosition.y - snode->mTransform.b4;
			nd->mTransformation.c4 = snode->mTargetPosition.z - snode->mTransform.c4;

			nd->mParent = node;

			// The .Target node is always the first child node 
			for (unsigned int m = 0; m < node->mNumChildren;++m)
				node->mChildren[m+1] = node->mChildren[m]; 
		
			node->mChildren[0] = nd;
			node->mNumChildren++;

			// What we did is so great, it is at least worth a debug message
			DefaultLogger::get()->debug("ASE: Generating separate target node ("+snode->mName+")");
		}
	}

	// Allocate enough space for the child nodes
	// We allocate one slot more  in case this is a target camera/light
	pcParent->mNumChildren = (unsigned int)apcNodes.size();
	if (pcParent->mNumChildren)	{
		pcParent->mChildren = new aiNode*[apcNodes.size()+1 /* PLUS ONE !!! */];

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

// ------------------------------------------------------------------------------------------------
// Build the output node graph
void ASEImporter::BuildNodes(std::vector<BaseNode*>& nodes)	{
	ai_assert(NULL != pcScene);

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

	// Setup the coordinate system transformation
	pcScene->mRootNode->mNumChildren = 1;
	pcScene->mRootNode->mChildren = new aiNode*[1];
	aiNode* ch = pcScene->mRootNode->mChildren[0] = new aiNode();
	ch->mParent = root;

	// Change the transformation matrix of all nodes
	for (std::vector<BaseNode*>::iterator it = nodes.begin(), end = nodes.end();it != end; ++it)	{
		aiMatrix4x4& m = (*it)->mTransform;
		m.Transpose(); // row-order vs column-order
	}

	// add all nodes
	AddNodes(nodes,ch,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;
		
		// search the list another time, starting *here* 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;

	// The root node should not have at least one child or the file is valid
	if (!pcScene->mRootNode->mNumChildren) {
		throw DeadlyImportError("ASE: No nodes loaded. The file is either empty or corrupt");
	}
	
	// Now rotate the whole scene 90 degrees around the x axis to convert to internal coordinate system
	pcScene->mRootNode->mTransformation = aiMatrix4x4(1.f,0.f,0.f,0.f,
		0.f,0.f,1.f,0.f,0.f,-1.f,0.f,0.f,0.f,0.f,0.f,1.f);
}

// ------------------------------------------------------------------------------------------------
// Convert the imported data to the internal verbose representation
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, fi = 0;
	for (std::vector<ASE::Face>::iterator i =  mesh.mFaces.begin();i != mesh.mFaces.end();++i,++fi)	{
		for (unsigned int n = 0; n < 3;++n,++iCurrent)
		{
			mPositions[iCurrent] = mesh.mPositions[(*i).mIndices[n]];

			// add texture coordinates
			for (unsigned int c = 0; c < AI_MAX_NUMBER_OF_TEXTURECOORDS;++c)	{
				if (mesh.amTexCoords[c].empty())break;
				amTexCoords[c][iCurrent] = mesh.amTexCoords[c][(*i).amUVIndices[c][n]];
			}
			// 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[fi*3+n];
				mNormals[iCurrent].Normalize();
			}

			// 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]];
			}
			(*i).mIndices[n] = iCurrent;
		}
	}

	// 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];
}

// ------------------------------------------------------------------------------------------------
// Copy a texture from the ASE structs to the output material
void CopyASETexture(aiMaterial& mat, ASE::Texture& texture, aiTextureType type)
{
	// Setup the texture name
	aiString tex;
	tex.Set( texture.mMapName);
	mat.AddProperty( &tex, AI_MATKEY_TEXTURE(type,0));

	// Setup the texture blend factor
	if (is_not_qnan(texture.mTextureBlend))
		mat.AddProperty<float>( &texture.mTextureBlend, 1, AI_MATKEY_TEXBLEND(type,0));

	// Setup texture UV transformations
	mat.AddProperty<float>(&texture.mOffsetU,5,AI_MATKEY_UVTRANSFORM(type,0));
}

// ------------------------------------------------------------------------------------------------
// Convert from ASE material to output material
void ASEImporter::ConvertMaterial(ASE::Material& mat)
{
	// LARGE TODO: Much code her is copied from 3DS ... join them maybe?

	// Allocate the output material
	mat.pcInstance = new aiMaterial();

	// At first add the base ambient color of the
	// scene to	the material
	mat.mAmbient.r += mParser->m_clrAmbient.r;
	mat.mAmbient.g += mParser->m_clrAmbient.g;
	mat.mAmbient.b += 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 (D3DS::Discreet3DS::Metal == mat.mShading ||
		D3DS::Discreet3DS::Phong == mat.mShading ||
		D3DS::Discreet3DS::Blinn == mat.mShading)
	{
		mat.mShading = D3DS::Discreet3DS::Gouraud;
	}

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

	// Two sided rendering?
	if (mat.mTwoSided)
	{
		int i = 1;
		mat.pcInstance->AddProperty<int>(&i,1,AI_MATKEY_TWOSIDED);
	}

	// shading mode
	aiShadingMode eShading = aiShadingMode_NoShading;
	switch (mat.mShading)
	{
		case D3DS::Discreet3DS::Flat:
			eShading = aiShadingMode_Flat; break;
		case D3DS::Discreet3DS::Phong :
			eShading = aiShadingMode_Phong; break;
		case D3DS::Discreet3DS::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 D3DS::Discreet3DS::Wire:
			{
				// set the wireframe flag
				unsigned int iWire = 1;
				mat.pcInstance->AddProperty<int>( (int*)&iWire,1,AI_MATKEY_ENABLE_WIREFRAME);
			}
		case D3DS::Discreet3DS::Gouraud:
			eShading = aiShadingMode_Gouraud; break;
		case D3DS::Discreet3DS::Metal :
			eShading = aiShadingMode_CookTorrance; break;
	}
	mat.pcInstance->AddProperty<int>( (int*)&eShading,1,AI_MATKEY_SHADING_MODEL);

	// DIFFUSE texture
	if( mat.sTexDiffuse.mMapName.length() > 0)
		CopyASETexture(*mat.pcInstance,mat.sTexDiffuse, aiTextureType_DIFFUSE);

	// SPECULAR texture
	if( mat.sTexSpecular.mMapName.length() > 0)
		CopyASETexture(*mat.pcInstance,mat.sTexSpecular, aiTextureType_SPECULAR);

	// AMBIENT texture
	if( mat.sTexAmbient.mMapName.length() > 0)
		CopyASETexture(*mat.pcInstance,mat.sTexAmbient, aiTextureType_AMBIENT);

	// OPACITY texture
	if( mat.sTexOpacity.mMapName.length() > 0)
		CopyASETexture(*mat.pcInstance,mat.sTexOpacity, aiTextureType_OPACITY);

	// EMISSIVE texture
	if( mat.sTexEmissive.mMapName.length() > 0)
		CopyASETexture(*mat.pcInstance,mat.sTexEmissive, aiTextureType_EMISSIVE);

	// BUMP texture
	if( mat.sTexBump.mMapName.length() > 0)
		CopyASETexture(*mat.pcInstance,mat.sTexBump, aiTextureType_HEIGHT);

	// SHININESS texture
	if( mat.sTexShininess.mMapName.length() > 0)
		CopyASETexture(*mat.pcInstance,mat.sTexShininess, aiTextureType_SHININESS);

	// 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;
}

// ------------------------------------------------------------------------------------------------
// Build output meshes
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, split it
	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 = NULL;
				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, ++iBase)	{
							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 for 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));
									}
								}
							}
							p_pcOut->mFaces[q].mIndices[t] = iBase;
						}
					}
				}
				// 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]];
						}
					}
				}
				// Copy bones
				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 
			p_pcOut->mFaces[iFace].mIndices[0] = mesh.mFaces[iFace].mIndices[0];
			p_pcOut->mFaces[iFace].mIndices[1] = mesh.mFaces[iFace].mIndices[1];
			p_pcOut->mFaces[iFace].mIndices[2] = mesh.mFaces[iFace].mIndices[2];
		}

		// copy vertex bones
		if (!mesh.mBones.empty() && !mesh.mBoneVertices.empty())	{
			std::vector<std::vector<aiVertexWeight> > avBonesOut( 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;
				}
			}
		}
	}
}

// ------------------------------------------------------------------------------------------------
// Setup proper material indices and build output materials
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)
	{
		ASE::Material& mat = mParser->m_vMaterials[iMat];
		if (mat.bNeed)	{
			// Convert it to the aiMaterial layout
			ConvertMaterial(mat);
			++pcScene->mNumMaterials;
		}
		for (unsigned int iSubMat = 0; iSubMat < mat.avSubMaterials.size();++iSubMat)
		{
			ASE::Material& submat = mat.avSubMaterials[iSubMat];
			if (submat.bNeed)	{
				// Convert it to the aiMaterial layout
				ConvertMaterial(submat);
				++pcScene->mNumMaterials;
			}
		}
	}

	// allocate the output material array
	pcScene->mMaterials = new aiMaterial*[pcScene->mNumMaterials];
	D3DS::Material** pcIntMaterials = new D3DS::Material*[pcScene->mNumMaterials];

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

			// Store the internal material, too
			pcIntMaterials[iNum] = &mat;

			// 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)
			{
				aiMesh* mesh = pcScene->mMeshes[iMesh];
				if (ASE::Face::DEFAULT_MATINDEX == mesh->mMaterialIndex &&
					iMat == (uintptr_t)mesh->mColors[3])
				{
					mesh->mMaterialIndex = iNum;
					mesh->mColors[3] = NULL;
				}
			}
			iNum++;
		}
		for (unsigned int iSubMat = 0; iSubMat < mat.avSubMaterials.size();++iSubMat)	{
			ASE::Material& submat = mat.avSubMaterials[iSubMat];
			if (submat.bNeed)	{
				ai_assert(NULL != submat.pcInstance);
				pcScene->mMaterials[iNum] = submat.pcInstance;

				// Store the internal material, too
				pcIntMaterials[iNum] = &submat;

				// 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)	{
					aiMesh* mesh = pcScene->mMeshes[iMesh];

					if (iSubMat == mesh->mMaterialIndex && iMat == (uintptr_t)mesh->mColors[3])	{
						mesh->mMaterialIndex = iNum;
						mesh->mColors[3]     = NULL;
					}
				}
				iNum++;
			}
		}
	}

	// Dekete our temporary array
	delete[] pcIntMaterials;
}

// ------------------------------------------------------------------------------------------------
// 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 is reused.
	ComputeNormalsWithSmoothingsGroups<ASE::Face>(mesh);
	return false;
}

#endif // !! ASSIMP_BUILD_NO_BASE_IMPORTER