424 lines
15 KiB
C++
424 lines
15 KiB
C++
/*
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---------------------------------------------------------------------------
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Open Asset Import Library (assimp)
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---------------------------------------------------------------------------
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Copyright (c) 2006-2019, assimp team
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All rights reserved.
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Redistribution and use of this software in source and binary forms,
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with or without modification, are permitted provided that the following
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conditions are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the
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following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other
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materials provided with the distribution.
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* Neither the name of the assimp team, nor the names of its
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contributors may be used to endorse or promote products
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derived from this software without specific prior
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written permission of the assimp team.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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---------------------------------------------------------------------------
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*/
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/** @file Defines a post processing step to search an importer's output
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for data that is obviously invalid */
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#ifndef ASSIMP_BUILD_NO_FINDINVALIDDATA_PROCESS
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// internal headers
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#include "FindInvalidDataProcess.h"
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#include "ProcessHelper.h"
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#include <assimp/Macros.h>
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#include <assimp/Exceptional.h>
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#include <assimp/qnan.h>
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using namespace Assimp;
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// ------------------------------------------------------------------------------------------------
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// Constructor to be privately used by Importer
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FindInvalidDataProcess::FindInvalidDataProcess()
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: configEpsilon(0.0)
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, mIgnoreTexCoods( false ){
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// nothing to do here
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}
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// ------------------------------------------------------------------------------------------------
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// Destructor, private as well
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FindInvalidDataProcess::~FindInvalidDataProcess() {
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// nothing to do here
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}
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// ------------------------------------------------------------------------------------------------
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// Returns whether the processing step is present in the given flag field.
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bool FindInvalidDataProcess::IsActive( unsigned int pFlags) const {
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return 0 != (pFlags & aiProcess_FindInvalidData);
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}
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// ------------------------------------------------------------------------------------------------
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// Setup import configuration
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void FindInvalidDataProcess::SetupProperties(const Importer* pImp) {
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// Get the current value of AI_CONFIG_PP_FID_ANIM_ACCURACY
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configEpsilon = (0 != pImp->GetPropertyFloat(AI_CONFIG_PP_FID_ANIM_ACCURACY,0.f));
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mIgnoreTexCoods = pImp->GetPropertyBool(AI_CONFIG_PP_FID_IGNORE_TEXTURECOORDS, false);
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}
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// ------------------------------------------------------------------------------------------------
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// Update mesh references in the node graph
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void UpdateMeshReferences(aiNode* node, const std::vector<unsigned int>& meshMapping) {
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if (node->mNumMeshes) {
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unsigned int out = 0;
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for (unsigned int a = 0; a < node->mNumMeshes;++a) {
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unsigned int ref = node->mMeshes[a];
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if (UINT_MAX != (ref = meshMapping[ref])) {
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node->mMeshes[out++] = ref;
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}
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}
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// just let the members that are unused, that's much cheaper
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// than a full array realloc'n'copy party ...
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if(!(node->mNumMeshes = out)) {
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delete[] node->mMeshes;
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node->mMeshes = NULL;
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}
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}
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// recursively update all children
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for (unsigned int i = 0; i < node->mNumChildren;++i) {
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UpdateMeshReferences(node->mChildren[i],meshMapping);
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}
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}
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// ------------------------------------------------------------------------------------------------
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// Executes the post processing step on the given imported data.
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void FindInvalidDataProcess::Execute( aiScene* pScene) {
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ASSIMP_LOG_DEBUG("FindInvalidDataProcess begin");
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bool out = false;
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std::vector<unsigned int> meshMapping(pScene->mNumMeshes);
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unsigned int real = 0;
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// Process meshes
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for( unsigned int a = 0; a < pScene->mNumMeshes; a++) {
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int result;
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if ((result = ProcessMesh( pScene->mMeshes[a]))) {
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out = true;
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if (2 == result) {
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// remove this mesh
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delete pScene->mMeshes[a];
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AI_DEBUG_INVALIDATE_PTR(pScene->mMeshes[a]);
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meshMapping[a] = UINT_MAX;
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continue;
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}
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}
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pScene->mMeshes[real] = pScene->mMeshes[a];
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meshMapping[a] = real++;
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}
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// Process animations
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for (unsigned int a = 0; a < pScene->mNumAnimations;++a) {
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ProcessAnimation( pScene->mAnimations[a]);
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}
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if (out) {
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if ( real != pScene->mNumMeshes) {
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if (!real) {
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throw DeadlyImportError("No meshes remaining");
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}
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// we need to remove some meshes.
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// therefore we'll also need to remove all references
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// to them from the scenegraph
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UpdateMeshReferences(pScene->mRootNode,meshMapping);
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pScene->mNumMeshes = real;
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}
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ASSIMP_LOG_INFO("FindInvalidDataProcess finished. Found issues ...");
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} else {
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ASSIMP_LOG_DEBUG("FindInvalidDataProcess finished. Everything seems to be OK.");
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}
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}
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// ------------------------------------------------------------------------------------------------
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template <typename T>
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inline
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const char* ValidateArrayContents(const T* /*arr*/, unsigned int /*size*/,
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const std::vector<bool>& /*dirtyMask*/, bool /*mayBeIdentical = false*/, bool /*mayBeZero = true*/)
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{
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return nullptr;
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}
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// ------------------------------------------------------------------------------------------------
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template <>
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inline
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const char* ValidateArrayContents<aiVector3D>(const aiVector3D* arr, unsigned int size,
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const std::vector<bool>& dirtyMask, bool mayBeIdentical , bool mayBeZero ) {
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bool b = false;
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unsigned int cnt = 0;
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for (unsigned int i = 0; i < size;++i) {
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if (dirtyMask.size() && dirtyMask[i]) {
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continue;
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}
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++cnt;
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const aiVector3D& v = arr[i];
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if (is_special_float(v.x) || is_special_float(v.y) || is_special_float(v.z)) {
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return "INF/NAN was found in a vector component";
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}
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if (!mayBeZero && !v.x && !v.y && !v.z ) {
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return "Found zero-length vector";
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}
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if (i && v != arr[i-1])b = true;
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}
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if (cnt > 1 && !b && !mayBeIdentical) {
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return "All vectors are identical";
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}
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return nullptr;
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}
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// ------------------------------------------------------------------------------------------------
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template <typename T>
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inline
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bool ProcessArray(T*& in, unsigned int num,const char* name,
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const std::vector<bool>& dirtyMask, bool mayBeIdentical = false, bool mayBeZero = true) {
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const char* err = ValidateArrayContents(in,num,dirtyMask,mayBeIdentical,mayBeZero);
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if (err) {
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ASSIMP_LOG_ERROR_F( "FindInvalidDataProcess fails on mesh ", name, ": ", err);
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delete[] in;
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in = NULL;
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return true;
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}
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return false;
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}
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// ------------------------------------------------------------------------------------------------
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template <typename T>
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AI_FORCE_INLINE bool EpsilonCompare(const T& n, const T& s, ai_real epsilon);
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// ------------------------------------------------------------------------------------------------
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AI_FORCE_INLINE bool EpsilonCompare(ai_real n, ai_real s, ai_real epsilon) {
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return std::fabs(n-s)>epsilon;
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}
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// ------------------------------------------------------------------------------------------------
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template <>
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bool EpsilonCompare<aiVectorKey>(const aiVectorKey& n, const aiVectorKey& s, ai_real epsilon) {
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return
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EpsilonCompare(n.mValue.x,s.mValue.x,epsilon) &&
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EpsilonCompare(n.mValue.y,s.mValue.y,epsilon) &&
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EpsilonCompare(n.mValue.z,s.mValue.z,epsilon);
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}
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// ------------------------------------------------------------------------------------------------
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template <>
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bool EpsilonCompare<aiQuatKey>(const aiQuatKey& n, const aiQuatKey& s, ai_real epsilon) {
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return
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EpsilonCompare(n.mValue.x,s.mValue.x,epsilon) &&
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EpsilonCompare(n.mValue.y,s.mValue.y,epsilon) &&
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EpsilonCompare(n.mValue.z,s.mValue.z,epsilon) &&
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EpsilonCompare(n.mValue.w,s.mValue.w,epsilon);
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}
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// ------------------------------------------------------------------------------------------------
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template <typename T>
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inline
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bool AllIdentical(T* in, unsigned int num, ai_real epsilon) {
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if (num <= 1) {
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return true;
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}
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if (fabs(epsilon) > 0.f) {
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for (unsigned int i = 0; i < num-1;++i) {
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if (!EpsilonCompare(in[i],in[i+1],epsilon)) {
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return false;
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}
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}
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} else {
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for (unsigned int i = 0; i < num-1;++i) {
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if (in[i] != in[i+1]) {
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return false;
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}
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}
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}
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return true;
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}
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// ------------------------------------------------------------------------------------------------
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// Search an animation for invalid content
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void FindInvalidDataProcess::ProcessAnimation (aiAnimation* anim) {
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// Process all animation channels
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for ( unsigned int a = 0; a < anim->mNumChannels; ++a ) {
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ProcessAnimationChannel( anim->mChannels[a]);
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}
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}
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// ------------------------------------------------------------------------------------------------
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void FindInvalidDataProcess::ProcessAnimationChannel (aiNodeAnim* anim) {
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ai_assert( nullptr != anim );
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if (anim->mNumPositionKeys == 0 && anim->mNumRotationKeys == 0 && anim->mNumScalingKeys == 0) {
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ai_assert_entry();
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return;
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}
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// Check whether all values in a tracks are identical - in this case
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// we can remove al keys except one.
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// POSITIONS
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int i = 0;
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if (anim->mNumPositionKeys > 1 && AllIdentical(anim->mPositionKeys,anim->mNumPositionKeys,configEpsilon)) {
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aiVectorKey v = anim->mPositionKeys[0];
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// Reallocate ... we need just ONE element, it makes no sense to reuse the array
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delete[] anim->mPositionKeys;
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anim->mPositionKeys = new aiVectorKey[anim->mNumPositionKeys = 1];
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anim->mPositionKeys[0] = v;
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i = 1;
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}
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// ROTATIONS
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if (anim->mNumRotationKeys > 1 && AllIdentical(anim->mRotationKeys,anim->mNumRotationKeys,configEpsilon)) {
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aiQuatKey v = anim->mRotationKeys[0];
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// Reallocate ... we need just ONE element, it makes no sense to reuse the array
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delete[] anim->mRotationKeys;
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anim->mRotationKeys = new aiQuatKey[anim->mNumRotationKeys = 1];
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anim->mRotationKeys[0] = v;
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i = 1;
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}
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// SCALINGS
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if (anim->mNumScalingKeys > 1 && AllIdentical(anim->mScalingKeys,anim->mNumScalingKeys,configEpsilon)) {
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aiVectorKey v = anim->mScalingKeys[0];
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// Reallocate ... we need just ONE element, it makes no sense to reuse the array
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delete[] anim->mScalingKeys;
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anim->mScalingKeys = new aiVectorKey[anim->mNumScalingKeys = 1];
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anim->mScalingKeys[0] = v;
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i = 1;
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}
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if ( 1 == i ) {
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ASSIMP_LOG_WARN("Simplified dummy tracks with just one key");
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}
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}
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// ------------------------------------------------------------------------------------------------
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// Search a mesh for invalid contents
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int FindInvalidDataProcess::ProcessMesh(aiMesh* pMesh)
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{
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bool ret = false;
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std::vector<bool> dirtyMask(pMesh->mNumVertices, pMesh->mNumFaces != 0);
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// Ignore elements that are not referenced by vertices.
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// (they are, for example, caused by the FindDegenerates step)
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for (unsigned int m = 0; m < pMesh->mNumFaces; ++m) {
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const aiFace& f = pMesh->mFaces[m];
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for (unsigned int i = 0; i < f.mNumIndices; ++i) {
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dirtyMask[f.mIndices[i]] = false;
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}
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}
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// Process vertex positions
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if (pMesh->mVertices && ProcessArray(pMesh->mVertices, pMesh->mNumVertices, "positions", dirtyMask)) {
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ASSIMP_LOG_ERROR("Deleting mesh: Unable to continue without vertex positions");
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return 2;
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}
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// process texture coordinates
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if (!mIgnoreTexCoods) {
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for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS && pMesh->mTextureCoords[i]; ++i) {
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if (ProcessArray(pMesh->mTextureCoords[i], pMesh->mNumVertices, "uvcoords", dirtyMask)) {
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pMesh->mNumUVComponents[i] = 0;
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// delete all subsequent texture coordinate sets.
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for (unsigned int a = i + 1; a < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++a) {
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delete[] pMesh->mTextureCoords[a];
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pMesh->mTextureCoords[a] = NULL;
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pMesh->mNumUVComponents[a] = 0;
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}
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ret = true;
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}
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}
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}
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// -- we don't validate vertex colors, it's difficult to say whether
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// they are invalid or not.
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// Normals and tangents are undefined for point and line faces.
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if (pMesh->mNormals || pMesh->mTangents) {
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if (aiPrimitiveType_POINT & pMesh->mPrimitiveTypes ||
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aiPrimitiveType_LINE & pMesh->mPrimitiveTypes)
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{
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if (aiPrimitiveType_TRIANGLE & pMesh->mPrimitiveTypes ||
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aiPrimitiveType_POLYGON & pMesh->mPrimitiveTypes)
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{
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// We need to update the lookup-table
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for (unsigned int m = 0; m < pMesh->mNumFaces;++m) {
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const aiFace& f = pMesh->mFaces[ m ];
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if (f.mNumIndices < 3) {
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dirtyMask[f.mIndices[0]] = true;
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if (f.mNumIndices == 2) {
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dirtyMask[f.mIndices[1]] = true;
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}
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}
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}
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}
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// Normals, tangents and bitangents are undefined for
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// the whole mesh (and should not even be there)
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else {
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return ret;
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}
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}
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// Process mesh normals
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if (pMesh->mNormals && ProcessArray(pMesh->mNormals,pMesh->mNumVertices,
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"normals",dirtyMask,true,false))
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ret = true;
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// Process mesh tangents
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if (pMesh->mTangents && ProcessArray(pMesh->mTangents,pMesh->mNumVertices,"tangents",dirtyMask)) {
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delete[] pMesh->mBitangents; pMesh->mBitangents = NULL;
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ret = true;
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}
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// Process mesh bitangents
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if (pMesh->mBitangents && ProcessArray(pMesh->mBitangents,pMesh->mNumVertices,"bitangents",dirtyMask)) {
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delete[] pMesh->mTangents; pMesh->mTangents = NULL;
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ret = true;
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}
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}
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return ret ? 1 : 0;
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}
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#endif // !! ASSIMP_BUILD_NO_FINDINVALIDDATA_PROCESS
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