add assimp submodule

1 files changed, 567 insertions, 0 deletions

diff --git a/src/mesh/assimp-master/code/PostProcessing/TextureTransform.cpp b/src/mesh/assimp-master/code/PostProcessing/TextureTransform.cpp
new file mode 100644
index 0000000..653506e
--- /dev/null
+++ b/src/mesh/assimp-master/code/PostProcessing/TextureTransform.cpp
@@ -0,0 +1,567 @@
+/*
+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 A helper class that processes texture transformations */
+
+
+
+#include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
+#include <assimp/DefaultLogger.hpp>
+#include <assimp/scene.h>
+
+#include "TextureTransform.h"
+#include <assimp/StringUtils.h>
+
+using namespace Assimp;
+
+// ------------------------------------------------------------------------------------------------
+// Constructor to be privately used by Importer
+TextureTransformStep::TextureTransformStep() :
+    configFlags()
+{
+    // nothing to do here
+}
+
+// ------------------------------------------------------------------------------------------------
+// Destructor, private as well
+TextureTransformStep::~TextureTransformStep()
+{
+    // nothing to do here
+}
+
+// ------------------------------------------------------------------------------------------------
+// Returns whether the processing step is present in the given flag field.
+bool TextureTransformStep::IsActive( unsigned int pFlags) const
+{
+    return  (pFlags & aiProcess_TransformUVCoords) != 0;
+}
+
+// ------------------------------------------------------------------------------------------------
+// Setup properties
+void TextureTransformStep::SetupProperties(const Importer* pImp)
+{
+    configFlags = pImp->GetPropertyInteger(AI_CONFIG_PP_TUV_EVALUATE,AI_UVTRAFO_ALL);
+}
+
+// ------------------------------------------------------------------------------------------------
+void TextureTransformStep::PreProcessUVTransform(STransformVecInfo& info)
+{
+    /*  This function tries to simplify the input UV transformation.
+     *  That's very important as it allows us to reduce the number
+     *  of output UV channels. The order in which the transformations
+     *  are applied is - as always - scaling, rotation, translation.
+     */
+
+	int rounded;
+	char szTemp[512];
+
+    /* Optimize the rotation angle. That's slightly difficult as
+     * we have an inprecise floating-point number (when comparing
+     * UV transformations we'll take that into account by using
+     * an epsilon of 5 degrees). If there is a rotation value, we can't
+     * perform any further optimizations.
+     */
+    if (info.mRotation)
+    {
+        float out = info.mRotation;
+        rounded = static_cast<int>((info.mRotation / static_cast<float>(AI_MATH_TWO_PI)));
+        if (rounded)
+        {
+            out -= rounded * static_cast<float>(AI_MATH_PI);
+            ASSIMP_LOG_INFO("Texture coordinate rotation ", info.mRotation, " can be simplified to ", out);
+        }
+
+        // Next step - convert negative rotation angles to positives
+        if (out < 0.f)
+            out = (float)AI_MATH_TWO_PI * 2 + out;
+
+        info.mRotation = out;
+        return;
+    }
+
+
+    /* Optimize UV translation in the U direction. To determine whether
+     * or not we can optimize we need to look at the requested mapping
+     * type (e.g. if mirroring is active there IS a difference between
+     * offset 2 and 3)
+     */
+    rounded = (int)info.mTranslation.x;
+    if (rounded) {
+        float out = 0.0f;
+        szTemp[0] = 0;
+        if (aiTextureMapMode_Wrap == info.mapU) {
+            // Wrap - simple take the fraction of the field
+            out = info.mTranslation.x-(float)rounded;
+			ai_snprintf(szTemp, 512, "[w] UV U offset %f can be simplified to %f", info.mTranslation.x, out);
+        }
+        else if (aiTextureMapMode_Mirror == info.mapU && 1 != rounded)  {
+            // Mirror
+            if (rounded % 2)
+                rounded--;
+            out = info.mTranslation.x-(float)rounded;
+
+            ai_snprintf(szTemp,512,"[m/d] UV U offset %f can be simplified to %f",info.mTranslation.x,out);
+        }
+        else if (aiTextureMapMode_Clamp == info.mapU || aiTextureMapMode_Decal == info.mapU)    {
+            // Clamp - translations beyond 1,1 are senseless
+            ai_snprintf(szTemp,512,"[c] UV U offset %f can be clamped to 1.0f",info.mTranslation.x);
+
+            out = 1.f;
+        }
+        if (szTemp[0])      {
+            ASSIMP_LOG_INFO(szTemp);
+            info.mTranslation.x = out;
+        }
+    }
+
+    /* Optimize UV translation in the V direction. To determine whether
+     * or not we can optimize we need to look at the requested mapping
+     * type (e.g. if mirroring is active there IS a difference between
+     * offset 2 and 3)
+     */
+    rounded = (int)info.mTranslation.y;
+    if (rounded) {
+        float out = 0.0f;
+        szTemp[0] = 0;
+        if (aiTextureMapMode_Wrap == info.mapV) {
+            // Wrap - simple take the fraction of the field
+            out = info.mTranslation.y-(float)rounded;
+            ::ai_snprintf(szTemp,512,"[w] UV V offset %f can be simplified to %f",info.mTranslation.y,out);
+        }
+        else if (aiTextureMapMode_Mirror == info.mapV  && 1 != rounded) {
+            // Mirror
+            if (rounded % 2)
+                rounded--;
+            out = info.mTranslation.x-(float)rounded;
+
+            ::ai_snprintf(szTemp,512,"[m/d] UV V offset %f can be simplified to %f",info.mTranslation.y,out);
+        }
+        else if (aiTextureMapMode_Clamp == info.mapV || aiTextureMapMode_Decal == info.mapV)    {
+            // Clamp - translations beyond 1,1 are senseless
+            ::ai_snprintf(szTemp,512,"[c] UV V offset %f can be clamped to 1.0f",info.mTranslation.y);
+
+            out = 1.f;
+        }
+        if (szTemp[0])  {
+            ASSIMP_LOG_INFO(szTemp);
+            info.mTranslation.y = out;
+        }
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+void UpdateUVIndex(const std::list<TTUpdateInfo>& l, unsigned int n)
+{
+    // Don't set if == 0 && wasn't set before
+    for (std::list<TTUpdateInfo>::const_iterator it = l.begin();it != l.end(); ++it) {
+        const TTUpdateInfo& info = *it;
+
+        if (info.directShortcut)
+            *info.directShortcut = n;
+        else if (!n)
+        {
+            info.mat->AddProperty<int>((int*)&n,1,AI_MATKEY_UVWSRC(info.semantic,info.index));
+        }
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+inline const char* MappingModeToChar(aiTextureMapMode map)
+{
+    if (aiTextureMapMode_Wrap == map)
+        return "-w";
+
+    if (aiTextureMapMode_Mirror == map)
+        return "-m";
+
+    return "-c";
+}
+
+// ------------------------------------------------------------------------------------------------
+void TextureTransformStep::Execute( aiScene* pScene)
+{
+    ASSIMP_LOG_DEBUG("TransformUVCoordsProcess begin");
+
+
+    /*  We build a per-mesh list of texture transformations we'll need
+     *  to apply. To achieve this, we iterate through all materials,
+     *  find all textures and get their transformations and UV indices.
+     *  Then we search for all meshes using this material.
+     */
+    typedef std::list<STransformVecInfo> MeshTrafoList;
+    std::vector<MeshTrafoList> meshLists(pScene->mNumMeshes);
+
+    for (unsigned int i = 0; i < pScene->mNumMaterials;++i) {
+
+        aiMaterial* mat = pScene->mMaterials[i];
+        for (unsigned int a = 0; a < mat->mNumProperties;++a)   {
+
+            aiMaterialProperty* prop = mat->mProperties[a];
+            if (!::strcmp( prop->mKey.data, "$tex.file"))   {
+                STransformVecInfo info;
+
+                // Setup a shortcut structure to allow for a fast updating
+                // of the UV index later
+                TTUpdateInfo update;
+                update.mat = (aiMaterial*) mat;
+                update.semantic = prop->mSemantic;
+                update.index = prop->mIndex;
+
+                // Get textured properties and transform
+                for (unsigned int a2 = 0; a2 < mat->mNumProperties;++a2)  {
+                    aiMaterialProperty* prop2 = mat->mProperties[a2];
+                    if (prop2->mSemantic != prop->mSemantic || prop2->mIndex != prop->mIndex) {
+                        continue;
+                    }
+
+                    if ( !::strcmp( prop2->mKey.data, "$tex.uvwsrc")) {
+                        info.uvIndex = *((int*)prop2->mData);
+
+                        // Store a direct pointer for later use
+                        update.directShortcut = (unsigned int*) prop2->mData;
+                    }
+
+                    else if ( !::strcmp( prop2->mKey.data, "$tex.mapmodeu")) {
+                        info.mapU = *((aiTextureMapMode*)prop2->mData);
+                    }
+                    else if ( !::strcmp( prop2->mKey.data, "$tex.mapmodev")) {
+                        info.mapV = *((aiTextureMapMode*)prop2->mData);
+                    }
+                    else if ( !::strcmp( prop2->mKey.data, "$tex.uvtrafo"))  {
+                        // ValidateDS should check this
+                        ai_assert(prop2->mDataLength >= 20);
+                        ::memcpy(&info.mTranslation.x,prop2->mData,sizeof(float)*5);
+
+                        // Directly remove this property from the list
+                        mat->mNumProperties--;
+                        for (unsigned int a3 = a2; a3 < mat->mNumProperties;++a3) {
+                            mat->mProperties[a3] = mat->mProperties[a3+1];
+                        }
+
+                        delete prop2;
+
+                        // Warn: could be an underflow, but this does not invoke undefined behaviour
+                        --a2;
+                    }
+                }
+
+                // Find out which transformations are to be evaluated
+                if (!(configFlags & AI_UVTRAFO_ROTATION)) {
+                    info.mRotation = 0.f;
+                }
+                if (!(configFlags & AI_UVTRAFO_SCALING)) {
+                    info.mScaling = aiVector2D(1.f,1.f);
+                }
+                if (!(configFlags & AI_UVTRAFO_TRANSLATION)) {
+                    info.mTranslation = aiVector2D(0.f,0.f);
+                }
+
+                // Do some preprocessing
+                PreProcessUVTransform(info);
+                info.uvIndex = std::min(info.uvIndex,AI_MAX_NUMBER_OF_TEXTURECOORDS -1u);
+
+                // Find out whether this material is used by more than
+                // one mesh. This will make our task much, much more difficult!
+                unsigned int cnt = 0;
+                for (unsigned int n = 0; n < pScene->mNumMeshes;++n)    {
+                    if (pScene->mMeshes[n]->mMaterialIndex == i)
+                        ++cnt;
+                }
+
+                if (!cnt)
+                    continue;
+                else if (1 != cnt)  {
+                    // This material is referenced by more than one mesh!
+                    // So we need to make sure the UV index for the texture
+                    // is identical for each of it ...
+                    info.lockedPos = AI_TT_UV_IDX_LOCK_TBD;
+                }
+
+                // Get all corresponding meshes
+                for (unsigned int n = 0; n < pScene->mNumMeshes;++n)    {
+                    aiMesh* mesh = pScene->mMeshes[n];
+                    if (mesh->mMaterialIndex != i || !mesh->mTextureCoords[0])
+                        continue;
+
+                    unsigned int uv = info.uvIndex;
+                    if (!mesh->mTextureCoords[uv])  {
+                        // If the requested UV index is not available, take the first one instead.
+                        uv = 0;
+                    }
+
+                    if (mesh->mNumUVComponents[info.uvIndex] >= 3){
+                        ASSIMP_LOG_WARN("UV transformations on 3D mapping channels are not supported");
+                        continue;
+                    }
+
+                    MeshTrafoList::iterator it;
+
+                    // Check whether we have this transform setup already
+                    for (it = meshLists[n].begin();it != meshLists[n].end(); ++it)  {
+
+                        if ((*it) == info && (*it).uvIndex == uv)   {
+                            (*it).updateList.push_back(update);
+                            break;
+                        }
+                    }
+
+                    if (it == meshLists[n].end())   {
+                        meshLists[n].push_back(info);
+                        meshLists[n].back().uvIndex = uv;
+                        meshLists[n].back().updateList.push_back(update);
+                    }
+                }
+            }
+        }
+    }
+
+    char buffer[1024]; // should be sufficiently large
+    unsigned int outChannels = 0, inChannels = 0, transformedChannels = 0;
+
+    // Now process all meshes. Important: we don't remove unreferenced UV channels.
+    // This is a job for the RemoveUnreferencedData-Step.
+    for (unsigned int q = 0; q < pScene->mNumMeshes;++q)    {
+
+        aiMesh* mesh = pScene->mMeshes[q];
+        MeshTrafoList& trafo =  meshLists[q];
+
+        inChannels += mesh->GetNumUVChannels();
+
+        if (!mesh->mTextureCoords[0] || trafo.empty() ||  (trafo.size() == 1 && trafo.begin()->IsUntransformed())) {
+            outChannels += mesh->GetNumUVChannels();
+            continue;
+        }
+
+        // Move untransformed UV channels to the first position in the list ....
+        // except if we need a new locked index which should be as small as possible
+        bool veto = false, need = false;
+        unsigned int cnt = 0;
+        unsigned int untransformed = 0;
+
+        MeshTrafoList::iterator it,it2;
+        for (it = trafo.begin();it != trafo.end(); ++it,++cnt)  {
+
+            if (!(*it).IsUntransformed()) {
+                need = true;
+            }
+
+            if ((*it).lockedPos == AI_TT_UV_IDX_LOCK_TBD)   {
+                // Lock this index and make sure it won't be changed
+                (*it).lockedPos = cnt;
+                veto = true;
+                continue;
+            }
+
+            if (!veto && it != trafo.begin() && (*it).IsUntransformed())    {
+                for (it2 = trafo.begin();it2 != it; ++it2) {
+                    if (!(*it2).IsUntransformed())
+                        break;
+                }
+                trafo.insert(it2,*it);
+                trafo.erase(it);
+                break;
+            }
+        }
+        if (!need)
+            continue;
+
+        // Find all that are not at their 'locked' position and move them to it.
+        // Conflicts are possible but quite unlikely.
+        cnt = 0;
+        for (it = trafo.begin();it != trafo.end(); ++it,++cnt) {
+            if ((*it).lockedPos != AI_TT_UV_IDX_LOCK_NONE && (*it).lockedPos != cnt) {
+                it2 = trafo.begin();unsigned int t = 0;
+                while (t != (*it).lockedPos)
+                    ++it2;
+
+                if ((*it2).lockedPos != AI_TT_UV_IDX_LOCK_NONE) {
+                    ASSIMP_LOG_ERROR("Channel mismatch, can't compute all transformations properly [design bug]");
+                    continue;
+                }
+
+                std::swap(*it2,*it);
+                if ((*it).lockedPos == untransformed)
+                    untransformed = cnt;
+            }
+        }
+
+        // ... and add dummies for all unreferenced channels
+        // at the end of the list
+        bool ref[AI_MAX_NUMBER_OF_TEXTURECOORDS];
+        for (unsigned int n = 0; n < AI_MAX_NUMBER_OF_TEXTURECOORDS;++n)
+            ref[n] = !mesh->mTextureCoords[n];
+
+        for (it = trafo.begin();it != trafo.end(); ++it)
+            ref[(*it).uvIndex] = true;
+
+        for (unsigned int n = 0; n < AI_MAX_NUMBER_OF_TEXTURECOORDS;++n) {
+            if (ref[n])
+                continue;
+            trafo.push_back(STransformVecInfo());
+            trafo.back().uvIndex = n;
+        }
+
+        // Then check whether this list breaks the channel limit.
+        // The unimportant ones are at the end of the list, so
+        // it shouldn't be too worse if we remove them.
+        unsigned int size = (unsigned int)trafo.size();
+        if (size > AI_MAX_NUMBER_OF_TEXTURECOORDS) {
+
+            if (!DefaultLogger::isNullLogger()) {
+                ASSIMP_LOG_ERROR(static_cast<unsigned int>(trafo.size()), " UV channels required but just ",
+                    AI_MAX_NUMBER_OF_TEXTURECOORDS, " available");
+            }
+            size = AI_MAX_NUMBER_OF_TEXTURECOORDS;
+        }
+
+
+        aiVector3D* old[AI_MAX_NUMBER_OF_TEXTURECOORDS];
+        for (unsigned int n = 0; n < AI_MAX_NUMBER_OF_TEXTURECOORDS;++n)
+            old[n] = mesh->mTextureCoords[n];
+
+        // Now continue and generate the output channels. Channels
+        // that we're not going to need later can be overridden.
+        it = trafo.begin();
+        for (unsigned int n = 0; n < trafo.size();++n,++it) {
+
+            if (n >= size)  {
+                // Try to use an untransformed channel for all channels we threw over board
+                UpdateUVIndex((*it).updateList,untransformed);
+                continue;
+            }
+
+            outChannels++;
+
+            // Write to the log
+            if (!DefaultLogger::isNullLogger()) {
+                ::ai_snprintf(buffer,1024,"Mesh %u, channel %u: t(%.3f,%.3f), s(%.3f,%.3f), r(%.3f), %s%s",
+                    q,n,
+                    (*it).mTranslation.x,
+                    (*it).mTranslation.y,
+                    (*it).mScaling.x,
+                    (*it).mScaling.y,
+                    AI_RAD_TO_DEG( (*it).mRotation),
+                    MappingModeToChar ((*it).mapU),
+                    MappingModeToChar ((*it).mapV));
+
+                ASSIMP_LOG_INFO(buffer);
+            }
+
+            // Check whether we need a new buffer here
+            if (mesh->mTextureCoords[n])    {
+
+                it2 = it;++it2;
+                for (unsigned int m = n+1; m < size;++m, ++it2) {
+
+                    if ((*it2).uvIndex == n){
+                        it2 = trafo.begin();
+                        break;
+                    }
+                }
+                if (it2 == trafo.begin()){
+                    mesh->mTextureCoords[n] = new aiVector3D[mesh->mNumVertices];
+                }
+            }
+            else mesh->mTextureCoords[n] = new aiVector3D[mesh->mNumVertices];
+
+            aiVector3D* src = old[(*it).uvIndex];
+            aiVector3D* dest, *end;
+            dest = mesh->mTextureCoords[n];
+
+            ai_assert(nullptr != src);
+
+            // Copy the data to the destination array
+            if (dest != src)
+                ::memcpy(dest,src,sizeof(aiVector3D)*mesh->mNumVertices);
+
+            end = dest + mesh->mNumVertices;
+
+            // Build a transformation matrix and transform all UV coords with it
+            if (!(*it).IsUntransformed()) {
+                const aiVector2D& trl = (*it).mTranslation;
+                const aiVector2D& scl = (*it).mScaling;
+
+                // fixme: simplify ..
+                ++transformedChannels;
+                aiMatrix3x3 matrix;
+
+                aiMatrix3x3 m2,m3,m4,m5;
+
+                m4.a1 = scl.x;
+                m4.b2 = scl.y;
+
+                m2.a3 = m2.b3 = 0.5f;
+                m3.a3 = m3.b3 = -0.5f;
+
+                if ((*it).mRotation > AI_TT_ROTATION_EPSILON )
+                    aiMatrix3x3::RotationZ((*it).mRotation,matrix);
+
+                m5.a3 += trl.x; m5.b3 += trl.y;
+                matrix = m2 * m4 * matrix * m3 * m5;
+
+                for (src = dest; src != end; ++src) { /* manual homogeneous divide */
+                    src->z = 1.f;
+                    *src = matrix * *src;
+                    src->x /= src->z;
+                    src->y /= src->z;
+                    src->z = 0.f;
+                }
+            }
+
+            // Update all UV indices
+            UpdateUVIndex((*it).updateList,n);
+        }
+    }
+
+    // Print some detailed statistics into the log
+    if (!DefaultLogger::isNullLogger()) {
+
+        if (transformedChannels)    {
+            ASSIMP_LOG_INFO("TransformUVCoordsProcess end: ", outChannels, " output channels (in: ", inChannels, ", modified: ", transformedChannels,")");
+        } else {
+            ASSIMP_LOG_DEBUG("TransformUVCoordsProcess finished");
+        }
+    }
+}
+
+