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Diffstat (limited to 'src/mesh/assimp-master/code/PostProcessing/OptimizeMeshes.h')
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1 files changed, 186 insertions, 0 deletions
diff --git a/src/mesh/assimp-master/code/PostProcessing/OptimizeMeshes.h b/src/mesh/assimp-master/code/PostProcessing/OptimizeMeshes.h new file mode 100644 index 0000000..b80f98d --- /dev/null +++ b/src/mesh/assimp-master/code/PostProcessing/OptimizeMeshes.h @@ -0,0 +1,186 @@ +/* +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 OptimizeMeshes.h + * @brief Declares a post processing step to join meshes, if possible + */ +#ifndef AI_OPTIMIZEMESHESPROCESS_H_INC +#define AI_OPTIMIZEMESHESPROCESS_H_INC + +#include "Common/BaseProcess.h" + +#include <assimp/types.h> + +#include <vector> + +struct aiMesh; +struct aiNode; +class OptimizeMeshesProcessTest; + +namespace Assimp { + +// --------------------------------------------------------------------------- +/** @brief Postprocessing step to optimize mesh usage + * + * The implementation looks for meshes that could be joined and joins them. + * Usually this will reduce the number of drawcalls. + * + * @note Instanced meshes are currently not processed. + */ +class OptimizeMeshesProcess : public BaseProcess { +public: + /// @brief The class constructor. + OptimizeMeshesProcess(); + + /// @brief The class destructor. + ~OptimizeMeshesProcess(); + + /** @brief Internal utility to store additional mesh info + */ + struct MeshInfo { + MeshInfo() AI_NO_EXCEPT + : instance_cnt(0) + , vertex_format(0) + , output_id(0xffffffff) { + // empty + } + + //! Number of times this mesh is referenced + unsigned int instance_cnt; + + //! Vertex format id + unsigned int vertex_format; + + //! Output ID + unsigned int output_id; + }; + +public: + // ------------------------------------------------------------------- + bool IsActive( unsigned int pFlags) const; + + // ------------------------------------------------------------------- + void Execute( aiScene* pScene); + + // ------------------------------------------------------------------- + void SetupProperties(const Importer* pImp); + + + // ------------------------------------------------------------------- + /** @brief Specify whether you want meshes with different + * primitive types to be merged as well. + * + * IsActive() sets this property automatically to true if the + * aiProcess_SortByPType flag is found. + */ + void EnablePrimitiveTypeSorting(bool enable) { + pts = enable; + } + + // Getter + bool IsPrimitiveTypeSortingEnabled () const { + return pts; + } + + + // ------------------------------------------------------------------- + /** @brief Specify a maximum size of a single output mesh. + * + * If a single input mesh already exceeds this limit, it won't + * be split. + * @param verts Maximum number of vertices per mesh + * @param faces Maximum number of faces per mesh + */ + void SetPreferredMeshSizeLimit (unsigned int verts, unsigned int faces) + { + max_verts = verts; + max_faces = faces; + } + + +protected: + + // ------------------------------------------------------------------- + /** @brief Do the actual optimization on all meshes of this node + * @param pNode Node we're working with + */ + void ProcessNode( aiNode* pNode); + + // ------------------------------------------------------------------- + /** @brief Returns true if b can be joined with a + * + * @param verts Number of output verts up to now + * @param faces Number of output faces up to now + */ + bool CanJoin ( unsigned int a, unsigned int b, + unsigned int verts, unsigned int faces ); + + // ------------------------------------------------------------------- + /** @brief Find instanced meshes, for the moment we're excluding + * them from all optimizations + */ + void FindInstancedMeshes (aiNode* pNode); + +private: + + //! Scene we're working with + aiScene* mScene; + + //! Per mesh info + std::vector<MeshInfo> meshes; + + //! Output meshes + std::vector<aiMesh*> output; + + //! @see EnablePrimitiveTypeSorting + mutable bool pts; + + //! @see SetPreferredMeshSizeLimit + mutable unsigned int max_verts,max_faces; + + //! Temporary storage + std::vector<aiMesh*> merge_list; +}; + +} // end of namespace Assimp + +#endif // AI_CALCTANGENTSPROCESS_H_INC |