add assimp submodule

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