add assimp submodule

1 files changed, 384 insertions, 0 deletions

diff --git a/src/mesh/assimp-master/code/PostProcessing/ConvertToLHProcess.cpp b/src/mesh/assimp-master/code/PostProcessing/ConvertToLHProcess.cpp
new file mode 100644
index 0000000..4ded0fc
--- /dev/null
+++ b/src/mesh/assimp-master/code/PostProcessing/ConvertToLHProcess.cpp
@@ -0,0 +1,384 @@
+/*
+---------------------------------------------------------------------------
+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  MakeLeftHandedProcess.cpp
+ *  @brief Implementation of the post processing step to convert all
+ *  imported data to a left-handed coordinate system.
+ *
+ *  Face order & UV flip are also implemented here, for the sake of a
+ *  better location.
+ */
+
+#include "ConvertToLHProcess.h"
+#include <assimp/postprocess.h>
+#include <assimp/scene.h>
+#include <assimp/DefaultLogger.hpp>
+
+using namespace Assimp;
+
+#ifndef ASSIMP_BUILD_NO_MAKELEFTHANDED_PROCESS
+
+namespace {
+
+template <typename aiMeshType>
+void flipUVs(aiMeshType *pMesh) {
+    if (pMesh == nullptr) {
+        return;
+    }
+    // mirror texture y coordinate
+    for (unsigned int tcIdx = 0; tcIdx < AI_MAX_NUMBER_OF_TEXTURECOORDS; tcIdx++) {
+        if (!pMesh->HasTextureCoords(tcIdx)) {
+            break;
+        }
+
+        for (unsigned int vIdx = 0; vIdx < pMesh->mNumVertices; vIdx++) {
+            pMesh->mTextureCoords[tcIdx][vIdx].y = 1.0f - pMesh->mTextureCoords[tcIdx][vIdx].y;
+        }
+    }
+}
+
+} // namespace
+
+// ------------------------------------------------------------------------------------------------
+// Constructor to be privately used by Importer
+MakeLeftHandedProcess::MakeLeftHandedProcess() :
+        BaseProcess() {
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+// Destructor, private as well
+MakeLeftHandedProcess::~MakeLeftHandedProcess() {
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+// Returns whether the processing step is present in the given flag field.
+bool MakeLeftHandedProcess::IsActive(unsigned int pFlags) const {
+    return 0 != (pFlags & aiProcess_MakeLeftHanded);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Executes the post processing step on the given imported data.
+void MakeLeftHandedProcess::Execute(aiScene *pScene) {
+    // Check for an existent root node to proceed
+    ai_assert(pScene->mRootNode != nullptr);
+    ASSIMP_LOG_DEBUG("MakeLeftHandedProcess begin");
+
+    // recursively convert all the nodes
+    ProcessNode(pScene->mRootNode, aiMatrix4x4());
+
+    // process the meshes accordingly
+    for (unsigned int a = 0; a < pScene->mNumMeshes; ++a) {
+        ProcessMesh(pScene->mMeshes[a]);
+    }
+
+    // process the materials accordingly
+    for (unsigned int a = 0; a < pScene->mNumMaterials; ++a) {
+        ProcessMaterial(pScene->mMaterials[a]);
+    }
+
+    // transform all animation channels as well
+    for (unsigned int a = 0; a < pScene->mNumAnimations; a++) {
+        aiAnimation *anim = pScene->mAnimations[a];
+        for (unsigned int b = 0; b < anim->mNumChannels; b++) {
+            aiNodeAnim *nodeAnim = anim->mChannels[b];
+            ProcessAnimation(nodeAnim);
+        }
+    }
+    ASSIMP_LOG_DEBUG("MakeLeftHandedProcess finished");
+}
+
+// ------------------------------------------------------------------------------------------------
+// Recursively converts a node, all of its children and all of its meshes
+void MakeLeftHandedProcess::ProcessNode(aiNode *pNode, const aiMatrix4x4 &pParentGlobalRotation) {
+    // mirror all base vectors at the local Z axis
+    pNode->mTransformation.c1 = -pNode->mTransformation.c1;
+    pNode->mTransformation.c2 = -pNode->mTransformation.c2;
+    pNode->mTransformation.c3 = -pNode->mTransformation.c3;
+    pNode->mTransformation.c4 = -pNode->mTransformation.c4;
+
+    // now invert the Z axis again to keep the matrix determinant positive.
+    // The local meshes will be inverted accordingly so that the result should look just fine again.
+    pNode->mTransformation.a3 = -pNode->mTransformation.a3;
+    pNode->mTransformation.b3 = -pNode->mTransformation.b3;
+    pNode->mTransformation.c3 = -pNode->mTransformation.c3;
+    pNode->mTransformation.d3 = -pNode->mTransformation.d3; // useless, but anyways...
+
+    // continue for all children
+    for (size_t a = 0; a < pNode->mNumChildren; ++a) {
+        ProcessNode(pNode->mChildren[a], pParentGlobalRotation * pNode->mTransformation);
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+// Converts a single mesh to left handed coordinates.
+void MakeLeftHandedProcess::ProcessMesh(aiMesh *pMesh) {
+    if (nullptr == pMesh) {
+        ASSIMP_LOG_ERROR("Nullptr to mesh found.");
+        return;
+    }
+    // mirror positions, normals and stuff along the Z axis
+    for (size_t a = 0; a < pMesh->mNumVertices; ++a) {
+        pMesh->mVertices[a].z *= -1.0f;
+        if (pMesh->HasNormals()) {
+            pMesh->mNormals[a].z *= -1.0f;
+        }
+        if (pMesh->HasTangentsAndBitangents()) {
+            pMesh->mTangents[a].z *= -1.0f;
+            pMesh->mBitangents[a].z *= -1.0f;
+        }
+    }
+
+    // mirror anim meshes positions, normals and stuff along the Z axis
+    for (size_t m = 0; m < pMesh->mNumAnimMeshes; ++m) {
+        for (size_t a = 0; a < pMesh->mAnimMeshes[m]->mNumVertices; ++a) {
+            pMesh->mAnimMeshes[m]->mVertices[a].z *= -1.0f;
+            if (pMesh->mAnimMeshes[m]->HasNormals()) {
+                pMesh->mAnimMeshes[m]->mNormals[a].z *= -1.0f;
+            }
+            if (pMesh->mAnimMeshes[m]->HasTangentsAndBitangents()) {
+                pMesh->mAnimMeshes[m]->mTangents[a].z *= -1.0f;
+                pMesh->mAnimMeshes[m]->mBitangents[a].z *= -1.0f;
+            }
+        }
+    }
+
+    // mirror offset matrices of all bones
+    for (size_t a = 0; a < pMesh->mNumBones; ++a) {
+        aiBone *bone = pMesh->mBones[a];
+        bone->mOffsetMatrix.a3 = -bone->mOffsetMatrix.a3;
+        bone->mOffsetMatrix.b3 = -bone->mOffsetMatrix.b3;
+        bone->mOffsetMatrix.d3 = -bone->mOffsetMatrix.d3;
+        bone->mOffsetMatrix.c1 = -bone->mOffsetMatrix.c1;
+        bone->mOffsetMatrix.c2 = -bone->mOffsetMatrix.c2;
+        bone->mOffsetMatrix.c4 = -bone->mOffsetMatrix.c4;
+    }
+
+    // mirror bitangents as well as they're derived from the texture coords
+    if (pMesh->HasTangentsAndBitangents()) {
+        for (unsigned int a = 0; a < pMesh->mNumVertices; a++)
+            pMesh->mBitangents[a] *= -1.0f;
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+// Converts a single material to left handed coordinates.
+void MakeLeftHandedProcess::ProcessMaterial(aiMaterial *_mat) {
+    if (nullptr == _mat) {
+        ASSIMP_LOG_ERROR("Nullptr to aiMaterial found.");
+        return;
+    }
+
+    aiMaterial *mat = (aiMaterial *)_mat;
+    for (unsigned int a = 0; a < mat->mNumProperties; ++a) {
+        aiMaterialProperty *prop = mat->mProperties[a];
+
+        // Mapping axis for UV mappings?
+        if (!::strcmp(prop->mKey.data, "$tex.mapaxis")) {
+            ai_assert(prop->mDataLength >= sizeof(aiVector3D)); // something is wrong with the validation if we end up here
+            aiVector3D *pff = (aiVector3D *)prop->mData;
+            pff->z *= -1.f;
+        }
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+// Converts the given animation to LH coordinates.
+void MakeLeftHandedProcess::ProcessAnimation(aiNodeAnim *pAnim) {
+    // position keys
+    for (unsigned int a = 0; a < pAnim->mNumPositionKeys; a++)
+        pAnim->mPositionKeys[a].mValue.z *= -1.0f;
+
+    // rotation keys
+    for (unsigned int a = 0; a < pAnim->mNumRotationKeys; a++) {
+        /* That's the safe version, but the float errors add up. So we try the short version instead
+        aiMatrix3x3 rotmat = pAnim->mRotationKeys[a].mValue.GetMatrix();
+        rotmat.a3 = -rotmat.a3; rotmat.b3 = -rotmat.b3;
+        rotmat.c1 = -rotmat.c1; rotmat.c2 = -rotmat.c2;
+        aiQuaternion rotquat( rotmat);
+        pAnim->mRotationKeys[a].mValue = rotquat;
+        */
+        pAnim->mRotationKeys[a].mValue.x *= -1.0f;
+        pAnim->mRotationKeys[a].mValue.y *= -1.0f;
+    }
+}
+
+#endif // !!  ASSIMP_BUILD_NO_MAKELEFTHANDED_PROCESS
+#ifndef ASSIMP_BUILD_NO_FLIPUVS_PROCESS
+// # FlipUVsProcess
+
+// ------------------------------------------------------------------------------------------------
+// Constructor to be privately used by Importer
+FlipUVsProcess::FlipUVsProcess() {}
+
+// ------------------------------------------------------------------------------------------------
+// Destructor, private as well
+FlipUVsProcess::~FlipUVsProcess() {}
+
+// ------------------------------------------------------------------------------------------------
+// Returns whether the processing step is present in the given flag field.
+bool FlipUVsProcess::IsActive(unsigned int pFlags) const {
+    return 0 != (pFlags & aiProcess_FlipUVs);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Executes the post processing step on the given imported data.
+void FlipUVsProcess::Execute(aiScene *pScene) {
+    ASSIMP_LOG_DEBUG("FlipUVsProcess begin");
+    for (unsigned int i = 0; i < pScene->mNumMeshes; ++i)
+        ProcessMesh(pScene->mMeshes[i]);
+
+    for (unsigned int i = 0; i < pScene->mNumMaterials; ++i)
+        ProcessMaterial(pScene->mMaterials[i]);
+    ASSIMP_LOG_DEBUG("FlipUVsProcess finished");
+}
+
+// ------------------------------------------------------------------------------------------------
+// Converts a single material
+void FlipUVsProcess::ProcessMaterial(aiMaterial *_mat) {
+    aiMaterial *mat = (aiMaterial *)_mat;
+    for (unsigned int a = 0; a < mat->mNumProperties; ++a) {
+        aiMaterialProperty *prop = mat->mProperties[a];
+        if (!prop) {
+            ASSIMP_LOG_VERBOSE_DEBUG("Property is null");
+            continue;
+        }
+
+        // UV transformation key?
+        if (!::strcmp(prop->mKey.data, "$tex.uvtrafo")) {
+            ai_assert(prop->mDataLength >= sizeof(aiUVTransform)); // something is wrong with the validation if we end up here
+            aiUVTransform *uv = (aiUVTransform *)prop->mData;
+
+            // just flip it, that's everything
+            uv->mTranslation.y *= -1.f;
+            uv->mRotation *= -1.f;
+        }
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+// Converts a single mesh
+void FlipUVsProcess::ProcessMesh(aiMesh *pMesh) {
+    flipUVs(pMesh);
+    for (unsigned int idx = 0; idx < pMesh->mNumAnimMeshes; idx++) {
+        flipUVs(pMesh->mAnimMeshes[idx]);
+    }
+}
+
+#endif // !ASSIMP_BUILD_NO_FLIPUVS_PROCESS
+#ifndef ASSIMP_BUILD_NO_FLIPWINDING_PROCESS
+// # FlipWindingOrderProcess
+
+// ------------------------------------------------------------------------------------------------
+// Constructor to be privately used by Importer
+FlipWindingOrderProcess::FlipWindingOrderProcess() {}
+
+// ------------------------------------------------------------------------------------------------
+// Destructor, private as well
+FlipWindingOrderProcess::~FlipWindingOrderProcess() {}
+
+// ------------------------------------------------------------------------------------------------
+// Returns whether the processing step is present in the given flag field.
+bool FlipWindingOrderProcess::IsActive(unsigned int pFlags) const {
+    return 0 != (pFlags & aiProcess_FlipWindingOrder);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Executes the post processing step on the given imported data.
+void FlipWindingOrderProcess::Execute(aiScene *pScene) {
+    ASSIMP_LOG_DEBUG("FlipWindingOrderProcess begin");
+    for (unsigned int i = 0; i < pScene->mNumMeshes; ++i)
+        ProcessMesh(pScene->mMeshes[i]);
+    ASSIMP_LOG_DEBUG("FlipWindingOrderProcess finished");
+}
+
+// ------------------------------------------------------------------------------------------------
+// Converts a single mesh
+void FlipWindingOrderProcess::ProcessMesh(aiMesh *pMesh) {
+    // invert the order of all faces in this mesh
+    for (unsigned int a = 0; a < pMesh->mNumFaces; a++) {
+        aiFace &face = pMesh->mFaces[a];
+        for (unsigned int b = 0; b < face.mNumIndices / 2; b++) {
+            std::swap(face.mIndices[b], face.mIndices[face.mNumIndices - 1 - b]);
+        }
+    }
+
+    // invert the order of all components in this mesh anim meshes
+    for (unsigned int m = 0; m < pMesh->mNumAnimMeshes; m++) {
+        aiAnimMesh *animMesh = pMesh->mAnimMeshes[m];
+        unsigned int numVertices = animMesh->mNumVertices;
+        if (animMesh->HasPositions()) {
+            for (unsigned int a = 0; a < numVertices; a++) {
+                std::swap(animMesh->mVertices[a], animMesh->mVertices[numVertices - 1 - a]);
+            }
+        }
+        if (animMesh->HasNormals()) {
+            for (unsigned int a = 0; a < numVertices; a++) {
+                std::swap(animMesh->mNormals[a], animMesh->mNormals[numVertices - 1 - a]);
+            }
+        }
+        for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; i++) {
+            if (animMesh->HasTextureCoords(i)) {
+                for (unsigned int a = 0; a < numVertices; a++) {
+                    std::swap(animMesh->mTextureCoords[i][a], animMesh->mTextureCoords[i][numVertices - 1 - a]);
+                }
+            }
+        }
+        if (animMesh->HasTangentsAndBitangents()) {
+            for (unsigned int a = 0; a < numVertices; a++) {
+                std::swap(animMesh->mTangents[a], animMesh->mTangents[numVertices - 1 - a]);
+                std::swap(animMesh->mBitangents[a], animMesh->mBitangents[numVertices - 1 - a]);
+            }
+        }
+        for (unsigned int v = 0; v < AI_MAX_NUMBER_OF_COLOR_SETS; v++) {
+            if (animMesh->HasVertexColors(v)) {
+                for (unsigned int a = 0; a < numVertices; a++) {
+                    std::swap(animMesh->mColors[v][a], animMesh->mColors[v][numVertices - 1 - a]);
+                }
+            }
+        }
+    }
+}
+
+#endif // !! ASSIMP_BUILD_NO_FLIPWINDING_PROCESS