add assimp submodule

1 files changed, 409 insertions, 0 deletions

diff --git a/src/mesh/assimp-master/code/PostProcessing/FindInvalidDataProcess.cpp b/src/mesh/assimp-master/code/PostProcessing/FindInvalidDataProcess.cpp
new file mode 100644
index 0000000..b42cbe9
--- /dev/null
+++ b/src/mesh/assimp-master/code/PostProcessing/FindInvalidDataProcess.cpp
@@ -0,0 +1,409 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2022, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* 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
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file Defines a post processing step to search an importer's output
+    for data that is obviously invalid  */
+
+#ifndef ASSIMP_BUILD_NO_FINDINVALIDDATA_PROCESS
+
+// internal headers
+#include "FindInvalidDataProcess.h"
+#include "ProcessHelper.h"
+
+#include <assimp/Exceptional.h>
+#include <assimp/qnan.h>
+
+using namespace Assimp;
+
+// ------------------------------------------------------------------------------------------------
+// Constructor to be privately used by Importer
+FindInvalidDataProcess::FindInvalidDataProcess() :
+        configEpsilon(0.0), mIgnoreTexCoods(false) {
+    // nothing to do here
+}
+
+// ------------------------------------------------------------------------------------------------
+// Destructor, private as well
+FindInvalidDataProcess::~FindInvalidDataProcess() {
+    // nothing to do here
+}
+
+// ------------------------------------------------------------------------------------------------
+// Returns whether the processing step is present in the given flag field.
+bool FindInvalidDataProcess::IsActive(unsigned int pFlags) const {
+    return 0 != (pFlags & aiProcess_FindInvalidData);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Setup import configuration
+void FindInvalidDataProcess::SetupProperties(const Importer *pImp) {
+    // Get the current value of AI_CONFIG_PP_FID_ANIM_ACCURACY
+    configEpsilon = (0 != pImp->GetPropertyFloat(AI_CONFIG_PP_FID_ANIM_ACCURACY, 0.f));
+    mIgnoreTexCoods = pImp->GetPropertyBool(AI_CONFIG_PP_FID_IGNORE_TEXTURECOORDS, false);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Update mesh references in the node graph
+void UpdateMeshReferences(aiNode *node, const std::vector<unsigned int> &meshMapping) {
+    if (node->mNumMeshes) {
+        unsigned int out = 0;
+        for (unsigned int a = 0; a < node->mNumMeshes; ++a) {
+
+            unsigned int ref = node->mMeshes[a];
+            if (UINT_MAX != (ref = meshMapping[ref])) {
+                node->mMeshes[out++] = ref;
+            }
+        }
+        // just let the members that are unused, that's much cheaper
+        // than a full array realloc'n'copy party ...
+        node->mNumMeshes = out;
+        if (0 == out) {
+            delete[] node->mMeshes;
+            node->mMeshes = nullptr;
+        }
+    }
+    // recursively update all children
+    for (unsigned int i = 0; i < node->mNumChildren; ++i) {
+        UpdateMeshReferences(node->mChildren[i], meshMapping);
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+// Executes the post processing step on the given imported data.
+void FindInvalidDataProcess::Execute(aiScene *pScene) {
+    ASSIMP_LOG_DEBUG("FindInvalidDataProcess begin");
+
+    bool out = false;
+    std::vector<unsigned int> meshMapping(pScene->mNumMeshes);
+    unsigned int real = 0;
+
+    // Process meshes
+    for (unsigned int a = 0; a < pScene->mNumMeshes; a++) {
+        int result = ProcessMesh(pScene->mMeshes[a]);
+        if (0 == result) {
+            out = true;
+        }
+        if (2 == result) {
+            // remove this mesh
+            delete pScene->mMeshes[a];
+            pScene->mMeshes[a] = nullptr;
+
+            meshMapping[a] = UINT_MAX;
+            out = true;
+            continue;
+        }
+
+        pScene->mMeshes[real] = pScene->mMeshes[a];
+        meshMapping[a] = real++;
+    }
+
+    // Process animations
+    for (unsigned int animIdx = 0; animIdx < pScene->mNumAnimations; ++animIdx) {
+        ProcessAnimation(pScene->mAnimations[animIdx]);
+    }
+
+    if (out) {
+        if (real != pScene->mNumMeshes) {
+            if (!real) {
+                throw DeadlyImportError("No meshes remaining");
+            }
+
+            // we need to remove some meshes.
+            // therefore we'll also need to remove all references
+            // to them from the scenegraph
+            UpdateMeshReferences(pScene->mRootNode, meshMapping);
+            pScene->mNumMeshes = real;
+        }
+
+        ASSIMP_LOG_INFO("FindInvalidDataProcess finished. Found issues ...");
+    } else {
+        ASSIMP_LOG_DEBUG("FindInvalidDataProcess finished. Everything seems to be OK.");
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+template <typename T>
+inline const char *ValidateArrayContents(const T * /*arr*/, unsigned int /*size*/,
+        const std::vector<bool> & /*dirtyMask*/, bool /*mayBeIdentical = false*/, bool /*mayBeZero = true*/) {
+    return nullptr;
+}
+
+// ------------------------------------------------------------------------------------------------
+template <>
+inline const char *ValidateArrayContents<aiVector3D>(const aiVector3D *arr, unsigned int size,
+        const std::vector<bool> &dirtyMask, bool mayBeIdentical, bool mayBeZero) {
+    bool b = false;
+    unsigned int cnt = 0;
+    for (unsigned int i = 0; i < size; ++i) {
+
+        if (dirtyMask.size() && dirtyMask[i]) {
+            continue;
+        }
+        ++cnt;
+
+        const aiVector3D &v = arr[i];
+        if (is_special_float(v.x) || is_special_float(v.y) || is_special_float(v.z)) {
+            return "INF/NAN was found in a vector component";
+        }
+        if (!mayBeZero && !v.x && !v.y && !v.z) {
+            return "Found zero-length vector";
+        }
+        if (i && v != arr[i - 1]) b = true;
+    }
+    if (cnt > 1 && !b && !mayBeIdentical) {
+        return "All vectors are identical";
+    }
+    return nullptr;
+}
+
+// ------------------------------------------------------------------------------------------------
+template <typename T>
+inline bool ProcessArray(T *&in, unsigned int num, const char *name,
+        const std::vector<bool> &dirtyMask, bool mayBeIdentical = false, bool mayBeZero = true) {
+    const char *err = ValidateArrayContents(in, num, dirtyMask, mayBeIdentical, mayBeZero);
+    if (err) {
+        ASSIMP_LOG_ERROR("FindInvalidDataProcess fails on mesh ", name, ": ", err);
+        delete[] in;
+        in = nullptr;
+        return true;
+    }
+    return false;
+}
+
+// ------------------------------------------------------------------------------------------------
+template <typename T>
+AI_FORCE_INLINE bool EpsilonCompare(const T &n, const T &s, ai_real epsilon);
+
+// ------------------------------------------------------------------------------------------------
+AI_FORCE_INLINE bool EpsilonCompare(ai_real n, ai_real s, ai_real epsilon) {
+    return std::fabs(n - s) > epsilon;
+}
+
+// ------------------------------------------------------------------------------------------------
+template <>
+bool EpsilonCompare<aiVectorKey>(const aiVectorKey &n, const aiVectorKey &s, ai_real epsilon) {
+    return EpsilonCompare(n.mValue.x, s.mValue.x, epsilon) &&
+           EpsilonCompare(n.mValue.y, s.mValue.y, epsilon) &&
+           EpsilonCompare(n.mValue.z, s.mValue.z, epsilon);
+}
+
+// ------------------------------------------------------------------------------------------------
+template <>
+bool EpsilonCompare<aiQuatKey>(const aiQuatKey &n, const aiQuatKey &s, ai_real epsilon) {
+    return EpsilonCompare(n.mValue.x, s.mValue.x, epsilon) &&
+           EpsilonCompare(n.mValue.y, s.mValue.y, epsilon) &&
+           EpsilonCompare(n.mValue.z, s.mValue.z, epsilon) &&
+           EpsilonCompare(n.mValue.w, s.mValue.w, epsilon);
+}
+
+// ------------------------------------------------------------------------------------------------
+template <typename T>
+inline bool AllIdentical(T *in, unsigned int num, ai_real epsilon) {
+    if (num <= 1) {
+        return true;
+    }
+
+    if (fabs(epsilon) > 0.f) {
+        for (unsigned int i = 0; i < num - 1; ++i) {
+            if (!EpsilonCompare(in[i], in[i + 1], epsilon)) {
+                return false;
+            }
+        }
+    } else {
+        for (unsigned int i = 0; i < num - 1; ++i) {
+            if (in[i] != in[i + 1]) {
+                return false;
+            }
+        }
+    }
+    return true;
+}
+
+// ------------------------------------------------------------------------------------------------
+// Search an animation for invalid content
+void FindInvalidDataProcess::ProcessAnimation(aiAnimation *anim) {
+    // Process all animation channels
+    for (unsigned int a = 0; a < anim->mNumChannels; ++a) {
+        ProcessAnimationChannel(anim->mChannels[a]);
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+void FindInvalidDataProcess::ProcessAnimationChannel(aiNodeAnim *anim) {
+    ai_assert(nullptr != anim);
+    if (anim->mNumPositionKeys == 0 && anim->mNumRotationKeys == 0 && anim->mNumScalingKeys == 0) {
+        ai_assert_entry();
+        return;
+    }
+
+    // Check whether all values in a tracks are identical - in this case
+    // we can remove al keys except one.
+    // POSITIONS
+    int i = 0;
+    if (anim->mNumPositionKeys > 1 && AllIdentical(anim->mPositionKeys, anim->mNumPositionKeys, configEpsilon)) {
+        aiVectorKey v = anim->mPositionKeys[0];
+
+        // Reallocate ... we need just ONE element, it makes no sense to reuse the array
+        delete[] anim->mPositionKeys;
+        anim->mPositionKeys = new aiVectorKey[anim->mNumPositionKeys = 1];
+        anim->mPositionKeys[0] = v;
+        i = 1;
+    }
+
+    // ROTATIONS
+    if (anim->mNumRotationKeys > 1 && AllIdentical(anim->mRotationKeys, anim->mNumRotationKeys, configEpsilon)) {
+        aiQuatKey v = anim->mRotationKeys[0];
+
+        // Reallocate ... we need just ONE element, it makes no sense to reuse the array
+        delete[] anim->mRotationKeys;
+        anim->mRotationKeys = new aiQuatKey[anim->mNumRotationKeys = 1];
+        anim->mRotationKeys[0] = v;
+        i = 1;
+    }
+
+    // SCALINGS
+    if (anim->mNumScalingKeys > 1 && AllIdentical(anim->mScalingKeys, anim->mNumScalingKeys, configEpsilon)) {
+        aiVectorKey v = anim->mScalingKeys[0];
+
+        // Reallocate ... we need just ONE element, it makes no sense to reuse the array
+        delete[] anim->mScalingKeys;
+        anim->mScalingKeys = new aiVectorKey[anim->mNumScalingKeys = 1];
+        anim->mScalingKeys[0] = v;
+        i = 1;
+    }
+    if (1 == i) {
+        ASSIMP_LOG_WARN("Simplified dummy tracks with just one key");
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+// Search a mesh for invalid contents
+int FindInvalidDataProcess::ProcessMesh(aiMesh *pMesh) {
+    bool ret = false;
+    std::vector<bool> dirtyMask(pMesh->mNumVertices, pMesh->mNumFaces != 0);
+
+    // Ignore elements that are not referenced by vertices.
+    // (they are, for example, caused by the FindDegenerates step)
+    for (unsigned int m = 0; m < pMesh->mNumFaces; ++m) {
+        const aiFace &f = pMesh->mFaces[m];
+
+        for (unsigned int i = 0; i < f.mNumIndices; ++i) {
+            dirtyMask[f.mIndices[i]] = false;
+        }
+    }
+
+    // Process vertex positions
+    if (pMesh->mVertices && ProcessArray(pMesh->mVertices, pMesh->mNumVertices, "positions", dirtyMask)) {
+        ASSIMP_LOG_ERROR("Deleting mesh: Unable to continue without vertex positions");
+
+        return 2;
+    }
+
+    // process texture coordinates
+    if (!mIgnoreTexCoods) {
+        for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS && pMesh->mTextureCoords[i]; ++i) {
+            if (ProcessArray(pMesh->mTextureCoords[i], pMesh->mNumVertices, "uvcoords", dirtyMask)) {
+                pMesh->mNumUVComponents[i] = 0;
+
+                // delete all subsequent texture coordinate sets.
+                for (unsigned int a = i + 1; a < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++a) {
+                    delete[] pMesh->mTextureCoords[a];
+                    pMesh->mTextureCoords[a] = nullptr;
+                    pMesh->mNumUVComponents[a] = 0;
+                }
+
+                ret = true;
+            }
+        }
+    }
+
+    // -- we don't validate vertex colors, it's difficult to say whether
+    // they are invalid or not.
+
+    // Normals and tangents are undefined for point and line faces.
+    if (pMesh->mNormals || pMesh->mTangents) {
+
+        if (aiPrimitiveType_POINT & pMesh->mPrimitiveTypes ||
+                aiPrimitiveType_LINE & pMesh->mPrimitiveTypes) {
+            if (aiPrimitiveType_TRIANGLE & pMesh->mPrimitiveTypes ||
+                    aiPrimitiveType_POLYGON & pMesh->mPrimitiveTypes) {
+                // We need to update the lookup-table
+                for (unsigned int m = 0; m < pMesh->mNumFaces; ++m) {
+                    const aiFace &f = pMesh->mFaces[m];
+
+                    if (f.mNumIndices < 3) {
+                        dirtyMask[f.mIndices[0]] = true;
+                        if (f.mNumIndices == 2) {
+                            dirtyMask[f.mIndices[1]] = true;
+                        }
+                    }
+                }
+            }
+            // Normals, tangents and bitangents are undefined for
+            // the whole mesh (and should not even be there)
+            else {
+                return ret;
+            }
+        }
+
+        // Process mesh normals
+        if (pMesh->mNormals && ProcessArray(pMesh->mNormals, pMesh->mNumVertices,
+                                       "normals", dirtyMask, true, false))
+            ret = true;
+
+        // Process mesh tangents
+        if (pMesh->mTangents && ProcessArray(pMesh->mTangents, pMesh->mNumVertices, "tangents", dirtyMask)) {
+            delete[] pMesh->mBitangents;
+            pMesh->mBitangents = nullptr;
+            ret = true;
+        }
+
+        // Process mesh bitangents
+        if (pMesh->mBitangents && ProcessArray(pMesh->mBitangents, pMesh->mNumVertices, "bitangents", dirtyMask)) {
+            delete[] pMesh->mTangents;
+            pMesh->mTangents = nullptr;
+            ret = true;
+        }
+    }
+    return ret ? 1 : 0;
+}
+
+#endif // !! ASSIMP_BUILD_NO_FINDINVALIDDATA_PROCESS