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Diffstat (limited to 'libs/assimp/code/Common/ScenePreprocessor.cpp')
| -rw-r--r-- | libs/assimp/code/Common/ScenePreprocessor.cpp | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/libs/assimp/code/Common/ScenePreprocessor.cpp b/libs/assimp/code/Common/ScenePreprocessor.cpp new file mode 100644 index 0000000..2ef291e --- /dev/null +++ b/libs/assimp/code/Common/ScenePreprocessor.cpp @@ -0,0 +1,285 @@ +/* +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. + +---------------------------------------------------------------------- +*/ + +#include "ScenePreprocessor.h" +#include <assimp/ai_assert.h> +#include <assimp/scene.h> +#include <assimp/DefaultLogger.hpp> + +using namespace Assimp; + +// --------------------------------------------------------------------------------------------- +void ScenePreprocessor::ProcessScene() { + ai_assert(scene != nullptr); + + // Process all meshes + for (unsigned int i = 0; i < scene->mNumMeshes; ++i) { + if (nullptr == scene->mMeshes[i]) { + continue; + } + ProcessMesh(scene->mMeshes[i]); + } + + // - nothing to do for nodes for the moment + // - nothing to do for textures for the moment + // - nothing to do for lights for the moment + // - nothing to do for cameras for the moment + + // Process all animations + for (unsigned int i = 0; i < scene->mNumAnimations; ++i) { + if (nullptr == scene->mAnimations[i]) { + continue; + } + ProcessAnimation(scene->mAnimations[i]); + } + + // Generate a default material if none was specified + if (!scene->mNumMaterials && scene->mNumMeshes) { + scene->mMaterials = new aiMaterial *[2]; + aiMaterial *helper; + + aiString name; + + scene->mMaterials[scene->mNumMaterials] = helper = new aiMaterial(); + aiColor3D clr(0.6f, 0.6f, 0.6f); + helper->AddProperty(&clr, 1, AI_MATKEY_COLOR_DIFFUSE); + + // setup the default name to make this material identifiable + name.Set(AI_DEFAULT_MATERIAL_NAME); + helper->AddProperty(&name, AI_MATKEY_NAME); + + ASSIMP_LOG_DEBUG("ScenePreprocessor: Adding default material \'" AI_DEFAULT_MATERIAL_NAME "\'"); + + for (unsigned int i = 0; i < scene->mNumMeshes; ++i) { + if (nullptr == scene->mMeshes[i]) { + continue; + } + scene->mMeshes[i]->mMaterialIndex = scene->mNumMaterials; + } + + scene->mNumMaterials++; + } +} + +// --------------------------------------------------------------------------------------------- +void ScenePreprocessor::ProcessMesh(aiMesh *mesh) { + // If aiMesh::mNumUVComponents is *not* set assign the default value of 2 + for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) { + if (!mesh->mTextureCoords[i]) { + mesh->mNumUVComponents[i] = 0; + } else { + if (!mesh->mNumUVComponents[i]) { + mesh->mNumUVComponents[i] = 2; + } + + aiVector3D *p = mesh->mTextureCoords[i], *end = p + mesh->mNumVertices; + + // Ensure unused components are zeroed. This will make 1D texture channels work + // as if they were 2D channels .. just in case an application doesn't handle + // this case + if (2 == mesh->mNumUVComponents[i]) { + for (; p != end; ++p) { + p->z = 0.f; + } + } else if (1 == mesh->mNumUVComponents[i]) { + for (; p != end; ++p) { + p->z = p->y = 0.f; + } + } else if (3 == mesh->mNumUVComponents[i]) { + // Really 3D coordinates? Check whether the third coordinate is != 0 for at least one element + for (; p != end; ++p) { + if (p->z != 0) { + break; + } + } + if (p == end) { + ASSIMP_LOG_WARN("ScenePreprocessor: UVs are declared to be 3D but they're obviously not. Reverting to 2D."); + mesh->mNumUVComponents[i] = 2; + } + } + } + } + + // If the information which primitive types are there in the + // mesh is currently not available, compute it. + if (!mesh->mPrimitiveTypes) { + for (unsigned int a = 0; a < mesh->mNumFaces; ++a) { + aiFace &face = mesh->mFaces[a]; + switch (face.mNumIndices) { + case 3u: + mesh->mPrimitiveTypes |= aiPrimitiveType_TRIANGLE; + break; + + case 2u: + mesh->mPrimitiveTypes |= aiPrimitiveType_LINE; + break; + + case 1u: + mesh->mPrimitiveTypes |= aiPrimitiveType_POINT; + break; + + default: + mesh->mPrimitiveTypes |= aiPrimitiveType_POLYGON; + break; + } + } + } + + // If tangents and normals are given but no bitangents compute them + if (mesh->mTangents && mesh->mNormals && !mesh->mBitangents) { + mesh->mBitangents = new aiVector3D[mesh->mNumVertices]; + for (unsigned int i = 0; i < mesh->mNumVertices; ++i) { + mesh->mBitangents[i] = mesh->mNormals[i] ^ mesh->mTangents[i]; + } + } +} + +// --------------------------------------------------------------------------------------------- +void ScenePreprocessor::ProcessAnimation(aiAnimation *anim) { + double first = 10e10, last = -10e10; + for (unsigned int i = 0; i < anim->mNumChannels; ++i) { + aiNodeAnim *channel = anim->mChannels[i]; + + // If the exact duration of the animation is not given + // compute it now. + if (anim->mDuration == -1.) { + // Position keys + for (unsigned int j = 0; j < channel->mNumPositionKeys; ++j) { + aiVectorKey &key = channel->mPositionKeys[j]; + first = std::min(first, key.mTime); + last = std::max(last, key.mTime); + } + + // Scaling keys + for (unsigned int j = 0; j < channel->mNumScalingKeys; ++j) { + aiVectorKey &key = channel->mScalingKeys[j]; + first = std::min(first, key.mTime); + last = std::max(last, key.mTime); + } + + // Rotation keys + for (unsigned int j = 0; j < channel->mNumRotationKeys; ++j) { + aiQuatKey &key = channel->mRotationKeys[j]; + first = std::min(first, key.mTime); + last = std::max(last, key.mTime); + } + } + + // Check whether the animation channel has no rotation + // or position tracks. In this case we generate a dummy + // track from the information we have in the transformation + // matrix of the corresponding node. + if (!channel->mNumRotationKeys || !channel->mNumPositionKeys || !channel->mNumScalingKeys) { + // Find the node that belongs to this animation + aiNode *node = scene->mRootNode->FindNode(channel->mNodeName); + if (node) // ValidateDS will complain later if 'node' is nullptr + { + // Decompose the transformation matrix of the node + aiVector3D scaling, position; + aiQuaternion rotation; + + node->mTransformation.Decompose(scaling, rotation, position); + + // No rotation keys? Generate a dummy track + if (!channel->mNumRotationKeys) { + if (channel->mRotationKeys) { + delete[] channel->mRotationKeys; + channel->mRotationKeys = nullptr; + } + ai_assert(!channel->mRotationKeys); + channel->mNumRotationKeys = 1; + channel->mRotationKeys = new aiQuatKey[1]; + aiQuatKey &q = channel->mRotationKeys[0]; + + q.mTime = 0.; + q.mValue = rotation; + + ASSIMP_LOG_VERBOSE_DEBUG("ScenePreprocessor: Dummy rotation track has been generated"); + } else { + ai_assert(channel->mRotationKeys); + } + + // No scaling keys? Generate a dummy track + if (!channel->mNumScalingKeys) { + if (channel->mScalingKeys) { + delete[] channel->mScalingKeys; + channel->mScalingKeys = nullptr; + } + ai_assert(!channel->mScalingKeys); + channel->mNumScalingKeys = 1; + channel->mScalingKeys = new aiVectorKey[1]; + aiVectorKey &q = channel->mScalingKeys[0]; + + q.mTime = 0.; + q.mValue = scaling; + + ASSIMP_LOG_VERBOSE_DEBUG("ScenePreprocessor: Dummy scaling track has been generated"); + } else { + ai_assert(channel->mScalingKeys); + } + + // No position keys? Generate a dummy track + if (!channel->mNumPositionKeys) { + if (channel->mPositionKeys) { + delete[] channel->mPositionKeys; + channel->mPositionKeys = nullptr; + } + ai_assert(!channel->mPositionKeys); + channel->mNumPositionKeys = 1; + channel->mPositionKeys = new aiVectorKey[1]; + aiVectorKey &q = channel->mPositionKeys[0]; + + q.mTime = 0.; + q.mValue = position; + + ASSIMP_LOG_VERBOSE_DEBUG("ScenePreprocessor: Dummy position track has been generated"); + } else { + ai_assert(channel->mPositionKeys); + } + } + } + } + + if (anim->mDuration == -1.) { + ASSIMP_LOG_VERBOSE_DEBUG("ScenePreprocessor: Setting animation duration"); + anim->mDuration = last - std::min(first, 0.); + } +} |