assimp/code/ValidateDataStructure.cpp

/*
---------------------------------------------------------------------------
Open Asset Import Library (ASSIMP)
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* 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
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  contributors may be used to endorse or promote products
  derived from this software without specific prior
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*/

/** @file Implementation of the post processing step to validate 
 * the data structure returned by Assimp
 */

// STL headers
#include <vector>
#include <assert.h>

// internal headers
#include "ValidateDataStructure.h"
#include "BaseImporter.h"
#include "StringComparison.h"
#include "fast_atof.h"

// public ASSIMP headers
#include "../include/DefaultLogger.h"
#include "../include/aiPostProcess.h"
#include "../include/aiMesh.h"
#include "../include/aiScene.h"
#include "../include/aiAssert.h"

// CRT headers
#include <stdarg.h>

using namespace Assimp;

#if _MSC_VER >= 1400
#	define vsprintf vsprintf_s
#	define sprintf sprintf_s
#endif

// ------------------------------------------------------------------------------------------------
// Constructor to be privately used by Importer
ValidateDSProcess::ValidateDSProcess()
{
	// nothing to do here
}

// ------------------------------------------------------------------------------------------------
// Destructor, private as well
ValidateDSProcess::~ValidateDSProcess()
{
	// nothing to do here
}

// ------------------------------------------------------------------------------------------------
// Returns whether the processing step is present in the given flag field.
bool ValidateDSProcess::IsActive( unsigned int pFlags) const
{
	return (pFlags & aiProcess_ValidateDataStructure) != 0;
}
// ------------------------------------------------------------------------------------------------
void ValidateDSProcess::ReportError(const char* msg,...)
{
	ai_assert(NULL != msg);

	va_list args;
	va_start(args,msg);

	char szBuffer[3000];

	int iLen;
	iLen = vsprintf(szBuffer,msg,args);

	if (0 >= iLen)
	{
		// :-) should not happen ...
		throw new ImportErrorException("Idiot ... learn coding!");
	}
	va_end(args);
	ai_assert(false);
	throw new ImportErrorException("Validation failed: " + std::string(szBuffer,iLen));
}
// ------------------------------------------------------------------------------------------------
void ValidateDSProcess::ReportWarning(const char* msg,...)
{
	ai_assert(NULL != msg);

	va_list args;
	va_start(args,msg);

	char szBuffer[3000];

	int iLen;
	iLen = vsprintf(szBuffer,msg,args);

	if (0 >= iLen)
	{
		// :-) should not happen ...
		throw new ImportErrorException("Idiot ... learn coding!");
	}
	va_end(args);
	DefaultLogger::get()->warn("Validation warning: " + std::string(szBuffer,iLen));
}
// ------------------------------------------------------------------------------------------------
// Executes the post processing step on the given imported data.
void ValidateDSProcess::Execute( aiScene* pScene)
{
	this->mScene = pScene;
	DefaultLogger::get()->debug("ValidateDataStructureProcess begin");

	// validate all meshes
	if (pScene->mNumMeshes)
	{
		if (!pScene->mMeshes)
		{
			this->ReportError("aiScene::mMeshes is NULL (aiScene::mNumMeshes is %i)",
				pScene->mNumMeshes);
		}
		for (unsigned int i = 0; i < pScene->mNumMeshes;++i)
		{
			if (!pScene->mMeshes[i])
			{
				this->ReportError("aiScene::mMeshes[%i] is NULL (aiScene::mNumMeshes is %i)",
					i,pScene->mNumMeshes);
			}
			this->Validate(pScene->mMeshes[i]);
		}
	}
	else if (!(this->mScene->mFlags & AI_SCENE_FLAGS_ANIM_SKELETON_ONLY))
	{
		this->ReportError("aiScene::mNumMeshes is 0. At least one mesh must be there");
	}

	// validate all animations
	if (pScene->mNumAnimations)
	{
		if (!pScene->mAnimations)
		{
			this->ReportError("aiScene::mAnimations is NULL (aiScene::mNumAnimations is %i)",
				pScene->mNumAnimations);
		}
		for (unsigned int i = 0; i < pScene->mNumAnimations;++i)
		{
			if (!pScene->mAnimations[i])
			{
				this->ReportError("aiScene::mAnimations[%i] is NULL (aiScene::mNumAnimations is %i)",
					i,pScene->mNumAnimations);
			}
			this->Validate(pScene->mAnimations[i]);

			// check whether there are duplicate animation names
			for (unsigned int a = i+1; a < pScene->mNumAnimations;++a)
			{
				if (pScene->mAnimations[i]->mName == pScene->mAnimations[a]->mName)
				{
					this->ReportError("aiScene::mAnimations[%i] has the same name as "
						"aiScene::mAnimations[%i]",i,a);
				}
			}
		}
	}
	else if (this->mScene->mFlags & AI_SCENE_FLAGS_ANIM_SKELETON_ONLY)
	{
		this->ReportError("aiScene::mNumAnimations is 0 and the "
			"AI_SCENE_FLAGS_ANIM_SKELETON_ONLY flag is set.");
	}

	// validate all textures
	if (pScene->mNumTextures)
	{
		if (!pScene->mTextures)
		{
			this->ReportError("aiScene::mTextures is NULL (aiScene::mNumTextures is %i)",
				pScene->mNumTextures);
		}
		for (unsigned int i = 0; i < pScene->mNumTextures;++i)
		{
			if (!pScene->mTextures[i])
			{
				this->ReportError("aiScene::mTextures[%i] is NULL (aiScene::mNumTextures is %i)",
					i,pScene->mNumTextures);
			}
			this->Validate(pScene->mTextures[i]);
		}
	}

	// validate all materials
	if (pScene->mNumMaterials)
	{
		if (!pScene->mMaterials)
		{
			this->ReportError("aiScene::mMaterials is NULL (aiScene::mNumMaterials is %i)",
				pScene->mNumMaterials);
		}
		for (unsigned int i = 0; i < pScene->mNumMaterials;++i)
		{
			if (!pScene->mMaterials[i])
			{
				this->ReportError("aiScene::mMaterials[%i] is NULL (aiScene::mNumMaterials is %i)",
					i,pScene->mNumMaterials);
			}
			this->Validate(pScene->mMaterials[i]);
		}
	}
	else this->ReportError("aiScene::mNumMaterials is 0. At least one material must be there.");

	// validate the node graph of the scene
	this->Validate(pScene->mRootNode);

	DefaultLogger::get()->debug("ValidateDataStructureProcess end");
}
// ------------------------------------------------------------------------------------------------
void ValidateDSProcess::Validate( const aiMesh* pMesh)
{
	// validate the material index of the mesh
	if (pMesh->mMaterialIndex >= this->mScene->mNumMaterials)
	{
		this->ReportError("aiMesh::mMaterialIndex is invalid (value: %i maximum: %i)",
			pMesh->mMaterialIndex,this->mScene->mNumMaterials-1);
	}

	if (this->mScene->mFlags & AI_SCENE_FLAGS_ANIM_SKELETON_ONLY)
	{
		if (pMesh->mNumVertices || pMesh->mVertices ||
			pMesh->mNumFaces || pMesh->mFaces)
		{
			this->ReportWarning("The mesh contains vertices and faces although "
				"the AI_SCENE_FLAGS_ANIM_SKELETON_ONLY flag is set");
		}
	}
	else
	{
		// positions must always be there ...
		if (!pMesh->mNumVertices || !pMesh->mVertices)
		{
			this->ReportError("The mesh contains no vertices");
		}

		// faces, too
		if (!pMesh->mNumFaces || !pMesh->mFaces)
		{
			this->ReportError("The mesh contains no faces");
		}

		// now check whether the face indexing layout is correct:
		// unique vertices, pseudo-indexed.
		std::vector<bool> abRefList;
		abRefList.resize(pMesh->mNumVertices,false);
		for (unsigned int i = 0; i < pMesh->mNumFaces;++i)
		{
			aiFace& face = pMesh->mFaces[i];
			if (!face.mIndices)this->ReportError("aiMesh::mFaces[%i].mIndices is NULL",i);
			if (face.mNumIndices < 3)this->ReportError(
				"aiMesh::mFaces[%i].mIndices is not a triangle or polygon",i);

			for (unsigned int a = 0; a < face.mNumIndices;++a)
			{
				if (face.mIndices[a] >= pMesh->mNumVertices)
				{
					this->ReportError("aiMesh::mFaces[%i]::mIndices[%i] is out of range",i,a);
				}
				// the MSB flag is temporarily used by the extra verbose
				// mode to tell us that the JoinVerticesProcess might have 
				// been executed already.
				if ( !(this->mScene->mFlags & 0x80000000 ) && abRefList[face.mIndices[a]])
				{
					this->ReportError("aiMesh::mVertices[%i] is referenced twice - second "
						"time by aiMesh::mFaces[%i]::mIndices[%i]",face.mIndices[a],i,a);
				}
				abRefList[face.mIndices[a]] = true;
			}
		}
		// check whether there are vertices that aren't referenced by a face
		for (unsigned int i = 0; i < pMesh->mNumVertices;++i)
		{
			if (!abRefList[i])this->ReportError("aiMesh::mVertices[%i] is not referenced",i);
		}
		abRefList.clear();

		// texture channel 2 may not be set if channel 1 is zero ...
		{
			unsigned int i = 0;
			for (;i < AI_MAX_NUMBER_OF_TEXTURECOORDS;++i)
			{
				if (!pMesh->HasTextureCoords(i))break;
			}
			for (;i < AI_MAX_NUMBER_OF_TEXTURECOORDS;++i)
				if (pMesh->HasTextureCoords(i))
				{
					this->ReportError("Texture coordinate channel %i is existing, "
						"although the previous channel was NULL.",i);
				}
		}
		// the same for the vertex colors
		{
			unsigned int i = 0;
			for (;i < AI_MAX_NUMBER_OF_COLOR_SETS;++i)
			{
				if (!pMesh->HasVertexColors(i))break;
			}
			for (;i < AI_MAX_NUMBER_OF_COLOR_SETS;++i)
				if (pMesh->HasVertexColors(i))
				{
					this->ReportError("Vertex color channel %i is existing, "
						"although the previous channel was NULL.",i);
				}
		}
	}

	// now validate all bones
	if (pMesh->HasBones())
	{
		if (!pMesh->mBones)
		{
			this->ReportError("aiMesh::mBones is NULL (aiMesh::mNumBones is %i)",
				pMesh->mNumBones);
		}
		float* afSum = NULL;
		if (pMesh->mNumVertices)
		{
			afSum = new float[pMesh->mNumVertices];
			for (unsigned int i = 0; i < pMesh->mNumVertices;++i)
				afSum[i] = 0.0f;
		}

		// check whether there are duplicate bone names
		for (unsigned int i = 0; i < pMesh->mNumBones;++i)
		{
			if (!pMesh->mBones[i])
			{
				delete[] afSum;
				this->ReportError("aiMesh::mBones[%i] is NULL (aiMesh::mNumBones is %i)",
					i,pMesh->mNumBones);
			}
			this->Validate(pMesh,pMesh->mBones[i],afSum);

			for (unsigned int a = i+1; a < pMesh->mNumBones;++a)
			{
				if (pMesh->mBones[i]->mName == pMesh->mBones[a]->mName)
				{
					delete[] afSum;
					this->ReportError("aiMesh::mBones[%i] has the same name as "
						"aiMesh::mBones[%i]",i,a);
				}
			}
		}
		// check whether all bone weights for a vertex sum to 1.0 ...
		for (unsigned int i = 0; i < pMesh->mNumVertices;++i)
		{
			if (afSum[i] && (afSum[i] <= 0.995 || afSum[i] >= 1.005))
			{
				this->ReportWarning("aiMesh::mVertices[%i]: bone weight sum != 1.0 (sum is %f)",i,afSum[i]);
			}
		}
		delete[] afSum;
	}
}
// ------------------------------------------------------------------------------------------------
void ValidateDSProcess::Validate( const aiMesh* pMesh,
	const aiBone* pBone,float* afSum)
{
	this->Validate(&pBone->mName);

   	if (!pBone->mNumWeights)
	{
		this->ReportError("aiBone::mNumWeights is zero");
	}

	// check whether all vertices affected by this bone are valid
	for (unsigned int i = 0; i < pBone->mNumWeights;++i)
	{
		if (pBone->mWeights[i].mVertexId > pMesh->mNumVertices)
		{
			this->ReportError("aiBone::mWeights[%i].mVertexId is out of range",i);
		}
		else if (!pBone->mWeights[i].mWeight || pBone->mWeights[i].mWeight > 1.0f)
		{
			this->ReportWarning("aiBone::mWeights[%i].mWeight has an invalid value",i);
		}
		afSum[pBone->mWeights[i].mVertexId] += pBone->mWeights[i].mWeight;
	}
}
// ------------------------------------------------------------------------------------------------
void ValidateDSProcess::Validate( const aiAnimation* pAnimation)
{
	this->Validate(&pAnimation->mName);

	// validate all materials
	if (pAnimation->mNumBones)
	{
		if (!pAnimation->mBones)
		{
			this->ReportError("aiAnimation::mBones is NULL (aiAnimation::mNumBones is %i)",
				pAnimation->mBones);
		}
		for (unsigned int i = 0; i < pAnimation->mNumBones;++i)
		{
			if (!pAnimation->mBones[i])
			{
				this->ReportError("aiAnimation::mBones[%i] is NULL (aiAnimation::mNumBones is %i)",
					i,pAnimation->mNumBones);
			}
			this->Validate(pAnimation, pAnimation->mBones[i]);
		}
	}
	else this->ReportError("aiAnimation::mNumBones is 0. At least one bone animation channel must be there.");

	// Animation duration is allowed to be zero in cases where the anim contains only a single key frame.
	// if (!pAnimation->mDuration)this->ReportError("aiAnimation::mDuration is zero");
}
// ------------------------------------------------------------------------------------------------
void ValidateDSProcess::SearchForInvalidTextures(const aiMaterial* pMaterial,
	const char* szType)
{
	ai_assert(NULL != szType);

	// search all keys of the material ...
	// textures must be specified with rising indices (e.g. diffuse #2 may not be
	// specified if diffuse #1 is not there ...)

	// "$tex.file.<szType>[<index>]"
	char szBaseBuf[512];
	int iLen;
	iLen = ::sprintf(szBaseBuf,"$tex.file.%s",szType);
	if (0 >= iLen)return;

	int iNumIndices = 0;
	int iIndex = -1;
	for (unsigned int i = 0; i < pMaterial->mNumProperties;++i)
	{
		aiMaterialProperty* prop = pMaterial->mProperties[i];
		if (0 == ASSIMP_strincmp( prop->mKey.data, szBaseBuf, iLen ))
		{
			const char* sz = &prop->mKey.data[iLen];
			if (*sz)
			{
				++sz;
				iIndex = std::max(iIndex, (int)strtol10(sz,0));
				++iNumIndices;
			}

			if (aiPTI_String != prop->mType)
				this->ReportError("Material property %s is expected to be a string",prop->mKey.data);
		}
	}
	if (iIndex +1 != iNumIndices)
	{
		this->ReportError("%s #%i is set, but there are only %i %s textures",
			szType,iIndex,iNumIndices,szType);
	}

	// now check whether all UV indices are valid ...
	iLen = ::sprintf(szBaseBuf,"$tex.uvw.%s",szType);
	if (0 >= iLen)return;
	
	for (unsigned int i = 0; i < pMaterial->mNumProperties;++i)
	{
		aiMaterialProperty* prop = pMaterial->mProperties[i];
		if (0 == ASSIMP_strincmp( prop->mKey.data, szBaseBuf, iLen ))
		{
			if (aiPTI_Integer != prop->mType || sizeof(int) > prop->mDataLength)
				this->ReportError("Material property %s is expected to be an integer",prop->mKey.data);

			const char* sz = &prop->mKey.data[iLen];
			if (*sz)
			{
				++sz;
				iIndex = strtol10(sz,NULL);

				// ignore UV indices for texture channel that are not there ...
				if (iIndex >= iNumIndices)
				{
					// get the value
					iIndex = *((unsigned int*)prop->mData);

					// check whether there is a mesh using this material
					// which has not enough UV channels ...
					for (unsigned int a = 0; a < this->mScene->mNumMeshes;++a)
					{
						aiMesh* mesh = this->mScene->mMeshes[a];
						if(mesh->mMaterialIndex == (unsigned int)iIndex)
						{
							int iChannels = 0;
							while (mesh->HasTextureCoords(iChannels++));
							if (iIndex >= iChannels)
							{
								this->ReportError("Invalid UV index: %i (key %s). Mesh %i has only %i UV channels",
									iIndex,prop->mKey.data,a,iChannels);
							}
						}
					}
				}
			}
		}
	}
}
// ------------------------------------------------------------------------------------------------
void ValidateDSProcess::Validate( const aiMaterial* pMaterial)
{
	// check whether there are material keys that are obviously not legal
	for (unsigned int i = 0; i < pMaterial->mNumProperties;++i)
	{
		const aiMaterialProperty* prop = pMaterial->mProperties[i];
		if (!prop)
		{
			this->ReportError("aiMaterial::mProperties[%i] is NULL (aiMaterial::mNumProperties is %i)",
				i,pMaterial->mNumProperties);
		}
		if (!prop->mDataLength || !prop->mData)
		{
			this->ReportError("aiMaterial::mProperties[%i].mDataLength or "
				"aiMaterial::mProperties[%i].mData is 0",i,i);
		}
		// check all predefined types
		if (aiPTI_String == prop->mType)
		{
			// FIX: strings are now stored in a less expensive way ...
			if (prop->mDataLength < sizeof(size_t) + ((const aiString*)prop->mData)->length + 1)
			{
				this->ReportError("aiMaterial::mProperties[%i].mDataLength is "
					"too small to contain a string (%i, needed: %i)",
					i,prop->mDataLength,sizeof(aiString));
			}
			this->Validate((const aiString*)prop->mData);
		}
		else if (aiPTI_Float == prop->mType)
		{
			if (prop->mDataLength < sizeof(float))
			{
				this->ReportError("aiMaterial::mProperties[%i].mDataLength is "
					"too small to contain a float (%i, needed: %i)",
					i,prop->mDataLength,sizeof(float));
			}
		}
		else if (aiPTI_Integer == prop->mType)
		{
			if (prop->mDataLength < sizeof(int))
			{
				this->ReportError("aiMaterial::mProperties[%i].mDataLength is "
					"too small to contain an integer (%i, needed: %i)",
					i,prop->mDataLength,sizeof(int));
			}
		}
		// TODO: check whether there is a key with an unknown name ...
	}

	// make some more specific tests 
	float fTemp;
	int iShading;
	if (AI_SUCCESS == aiGetMaterialInteger( pMaterial,AI_MATKEY_SHADING_MODEL,&iShading))
	{
		switch ((aiShadingMode)iShading)
		{
		case aiShadingMode_Blinn:
		case aiShadingMode_CookTorrance:
		case aiShadingMode_Phong:

			if (AI_SUCCESS != aiGetMaterialFloat(pMaterial,AI_MATKEY_SHININESS,&fTemp))
			{
				this->ReportWarning("A specular shading model is specified but there is no "
					"AI_MATKEY_SHININESS key");
			}
			if (AI_SUCCESS == aiGetMaterialFloat(pMaterial,AI_MATKEY_SHININESS_STRENGTH,&fTemp) && !fTemp)
			{
				this->ReportWarning("A specular shading model is specified but the value of the "
					"AI_MATKEY_SHININESS_STRENGTH key is 0.0");
			}
			break;
		default: ;
		};
	}

	// check whether there are invalid texture keys
	SearchForInvalidTextures(pMaterial,"diffuse");
	SearchForInvalidTextures(pMaterial,"specular");
	SearchForInvalidTextures(pMaterial,"ambient");
	SearchForInvalidTextures(pMaterial,"emissive");
	SearchForInvalidTextures(pMaterial,"opacity");
	SearchForInvalidTextures(pMaterial,"shininess");
	SearchForInvalidTextures(pMaterial,"normals");
	SearchForInvalidTextures(pMaterial,"height");
}
// ------------------------------------------------------------------------------------------------
void ValidateDSProcess::Validate( const aiTexture* pTexture)
{
	// the data section may NEVER be NULL
	if (!pTexture->pcData)
	{
		this->ReportError("aiTexture::pcData is NULL");
	}
	if (pTexture->mHeight)
	{
		if (!pTexture->mWidth)this->ReportError("aiTexture::mWidth is zero "
			"(aiTexture::mHeight is %i, uncompressed texture)",pTexture->mHeight);
	}
	else 
	{
		if (!pTexture->mWidth)this->ReportError("aiTexture::mWidth is zero (compressed texture)");
		if ('.' == pTexture->achFormatHint[0])
		{
			char szTemp[5];
			szTemp[0] = pTexture->achFormatHint[0];
			szTemp[1] = pTexture->achFormatHint[1];
			szTemp[2] = pTexture->achFormatHint[2];
			szTemp[3] = pTexture->achFormatHint[3];
			szTemp[4] = '\0';

			this->ReportWarning("aiTexture::achFormatHint should contain a file extension "
				"without a leading dot (format hint: %s).",szTemp);
		}
	}

	const char* sz = pTexture->achFormatHint;
 	if (	sz[0] >= 'A' && sz[0] <= 'Z' ||
		sz[1] >= 'A' && sz[1] <= 'Z' ||
		sz[2] >= 'A' && sz[2] <= 'Z' ||
		sz[3] >= 'A' && sz[3] <= 'Z')
	{
		this->ReportError("aiTexture::achFormatHint contains non-lowercase characters");
	}
}
// ------------------------------------------------------------------------------------------------
void ValidateDSProcess::Validate( const aiAnimation* pAnimation,
	 const aiBoneAnim* pBoneAnim)
{
	this->Validate(&pBoneAnim->mBoneName);

#if 0
	// check whether there is a bone with this name ...
	unsigned int i = 0;
	for (; i < this->mScene->mNumMeshes;++i)
	{
		aiMesh* mesh = this->mScene->mMeshes[i];
		for (unsigned int a = 0; a < mesh->mNumBones;++a)
		{
			if (mesh->mBones[a]->mName == pBoneAnim->mBoneName)
				goto __break_out;
		}
	}
__break_out:
	if (i == this->mScene->mNumMeshes)
	{
		this->ReportWarning("aiBoneAnim::mBoneName is \"%s\". However, no bone with this name was found",
			pBoneAnim->mBoneName.data);
	}
	if (!pBoneAnim->mNumPositionKeys && !pBoneAnim->mNumRotationKeys && !pBoneAnim->mNumScalingKeys)
	{
		this->ReportWarning("A bone animation channel has no keys");
	}
#endif
	// otherwise check whether one of the keys exceeds the total duration of the animation
	if (pBoneAnim->mNumPositionKeys)
	{
		if (!pBoneAnim->mPositionKeys)
		{
			this->ReportError("aiBoneAnim::mPositionKeys is NULL (aiBoneAnim::mNumPositionKeys is %i)",
				pBoneAnim->mNumPositionKeys);
		}
		double dLast = -0.1;
		for (unsigned int i = 0; i < pBoneAnim->mNumPositionKeys;++i)
		{
			if (pBoneAnim->mPositionKeys[i].mTime > pAnimation->mDuration)
			{
				this->ReportError("aiBoneAnim::mPositionKeys[%i].mTime (%.5f) is larger "
					"than aiAnimation::mDuration (which is %.5f)",i,
					(float)pBoneAnim->mPositionKeys[i].mTime,
					(float)pAnimation->mDuration);
			}
			if (pBoneAnim->mPositionKeys[i].mTime <= dLast)
			{
				this->ReportWarning("aiBoneAnim::mPositionKeys[%i].mTime (%.5f) is smaller "
					"than aiAnimation::mPositionKeys[%i] (which is %.5f)",i,
					(float)pBoneAnim->mPositionKeys[i].mTime,
					i-1, (float)dLast);
			}
			dLast = pBoneAnim->mPositionKeys[i].mTime;
		}
	}
	// rotation keys
	if (pBoneAnim->mNumRotationKeys)
	{
		if (!pBoneAnim->mRotationKeys)
		{
			this->ReportError("aiBoneAnim::mRotationKeys is NULL (aiBoneAnim::mNumRotationKeys is %i)",
				pBoneAnim->mNumRotationKeys);
		}
		double dLast = -0.1;
		for (unsigned int i = 0; i < pBoneAnim->mNumRotationKeys;++i)
		{
			if (pBoneAnim->mRotationKeys[i].mTime > pAnimation->mDuration)
			{
				this->ReportError("aiBoneAnim::mRotationKeys[%i].mTime (%.5f) is larger "
					"than aiAnimation::mDuration (which is %.5f)",i,
					(float)pBoneAnim->mRotationKeys[i].mTime,
					(float)pAnimation->mDuration);
			}
			if (pBoneAnim->mRotationKeys[i].mTime <= dLast)
			{
				this->ReportWarning("aiBoneAnim::mRotationKeys[%i].mTime (%.5f) is smaller "
					"than aiAnimation::mRotationKeys[%i] (which is %.5f)",i,
					(float)pBoneAnim->mRotationKeys[i].mTime,
					i-1, (float)dLast);
			}
			dLast = pBoneAnim->mRotationKeys[i].mTime;
		}
	}
	// scaling keys
	if (pBoneAnim->mNumScalingKeys)
	{
		if (!pBoneAnim->mScalingKeys)
		{
			this->ReportError("aiBoneAnim::mScalingKeys is NULL (aiBoneAnim::mNumScalingKeys is %i)",
				pBoneAnim->mNumScalingKeys);
		}
		double dLast = -0.1;
		for (unsigned int i = 0; i < pBoneAnim->mNumScalingKeys;++i)
		{
			if (pBoneAnim->mScalingKeys[i].mTime > pAnimation->mDuration)
			{
				this->ReportError("aiBoneAnim::mScalingKeys[%i].mTime (%.5f) is larger "
					"than aiAnimation::mDuration (which is %.5f)",i,
					(float)pBoneAnim->mScalingKeys[i].mTime,
					(float)pAnimation->mDuration);
			}
			if (pBoneAnim->mScalingKeys[i].mTime <= dLast)
			{
				this->ReportWarning("aiBoneAnim::mScalingKeys[%i].mTime (%.5f) is smaller "
					"than aiAnimation::mScalingKeys[%i] (which is %.5f)",i,
					(float)pBoneAnim->mScalingKeys[i].mTime,
					i-1, (float)dLast);
			}
			dLast = pBoneAnim->mScalingKeys[i].mTime;
		}
	}
}
// ------------------------------------------------------------------------------------------------
void ValidateDSProcess::Validate( const aiNode* pNode)
{
	if (!pNode)this->ReportError("A node of the scenegraph is NULL");
	if (pNode != this->mScene->mRootNode && !pNode->mParent)
		this->ReportError("A node has no valid parent (aiNode::mParent is NULL)");

	this->Validate(&pNode->mName);

	// validate all meshes
	if (pNode->mNumMeshes)
	{
		if (!pNode->mMeshes)
		{
			this->ReportError("aiNode::mMeshes is NULL (aiNode::mNumMeshes is %i)",
				pNode->mNumMeshes);
		}
		std::vector<bool> abHadMesh;
		abHadMesh.resize(this->mScene->mNumMeshes,false);
		for (unsigned int i = 0; i < pNode->mNumMeshes;++i)
		{
			if (pNode->mMeshes[i] >= this->mScene->mNumMeshes)
			{
				this->ReportError("aiNode::mMeshes[%i] is out of range (maximum is %i)",
					pNode->mMeshes[i],this->mScene->mNumMeshes-1);
			}
			if (abHadMesh[pNode->mMeshes[i]])
			{
				this->ReportError("aiNode::mMeshes[%i] is already referenced by this node (value: %i)",
					i,pNode->mMeshes[i]);
			}
			abHadMesh[pNode->mMeshes[i]] = true;
		}
	}
	if (pNode->mNumChildren)
	{
		if (!pNode->mChildren)
		{
			this->ReportError("aiNode::mChildren is NULL (aiNode::mNumChildren is %i)",
				pNode->mNumChildren);
		}
		for (unsigned int i = 0; i < pNode->mNumChildren;++i)
		{
			this->Validate(pNode->mChildren[i]);
		}
	}
}
// ------------------------------------------------------------------------------------------------
void ValidateDSProcess::Validate( const aiString* pString)
{
	if (pString->length > MAXLEN)
	{
		this->ReportError("aiString::length is too large (%i, maximum is %i)",
			pString->length,MAXLEN);
	}
	const char* sz = pString->data;
	while (true)
	{
		if ('\0' == *sz)
		{
			if (pString->length != (unsigned int)(sz-pString->data))
				this->ReportError("aiString::data is invalid: the terminal zero is at a wrong offset");
			break;
		}
		else if (sz >= &pString->data[MAXLEN])
			this->ReportError("aiString::data is invalid. There is no terminal character");
		++sz;
	}
}