138 lines
4.6 KiB
C++
138 lines
4.6 KiB
C++
/*
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Open Asset Import Library (assimp)
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----------------------------------------------------------------------
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Copyright (c) 2006-2018, assimp team
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All rights reserved.
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Redistribution and use of this software in source and binary forms,
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with or without modification, are permitted provided that the
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following conditions are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the
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following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other
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materials provided with the distribution.
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* Neither the name of the assimp team, nor the names of its
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contributors may be used to endorse or promote products
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derived from this software without specific prior
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written permission of the assimp team.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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----------------------------------------------------------------------
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*/
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/** @file FindInstancesProcess.h
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* @brief Declares the aiProcess_FindInstances post-process step
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*/
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#ifndef AI_FINDINSTANCES_H_INC
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#define AI_FINDINSTANCES_H_INC
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#include "BaseProcess.h"
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#include "ProcessHelper.h"
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class FindInstancesProcessTest;
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namespace Assimp {
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// -------------------------------------------------------------------------------
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/** @brief Get a pseudo(!)-hash representing a mesh.
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*
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* The hash is built from number of vertices, faces, primitive types,
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* .... but *not* from the real mesh data. The funcction is not a perfect hash.
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* @param in Input mesh
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* @return Hash.
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*/
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inline
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uint64_t GetMeshHash(aiMesh* in) {
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ai_assert(nullptr != in);
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// ... get an unique value representing the vertex format of the mesh
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const unsigned int fhash = GetMeshVFormatUnique(in);
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// and bake it with number of vertices/faces/bones/matidx/ptypes
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return ((uint64_t)fhash << 32u) | ((
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(in->mNumBones << 16u) ^ (in->mNumVertices) ^
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(in->mNumFaces<<4u) ^ (in->mMaterialIndex<<15) ^
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(in->mPrimitiveTypes<<28)) & 0xffffffff );
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}
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// -------------------------------------------------------------------------------
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/** @brief Perform a component-wise comparison of two arrays
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*
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* @param first First array
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* @param second Second array
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* @param size Size of both arrays
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* @param e Epsilon
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* @return true if the arrays are identical
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*/
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inline
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bool CompareArrays(const aiVector3D* first, const aiVector3D* second,
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unsigned int size, float e) {
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for (const aiVector3D* end = first+size; first != end; ++first,++second) {
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if ( (*first - *second).SquareLength() >= e)
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return false;
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}
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return true;
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}
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// and the same for colors ...
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inline bool CompareArrays(const aiColor4D* first, const aiColor4D* second,
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unsigned int size, float e)
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{
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for (const aiColor4D* end = first+size; first != end; ++first,++second) {
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if ( GetColorDifference(*first,*second) >= e)
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return false;
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}
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return true;
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}
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// ---------------------------------------------------------------------------
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/** @brief A post-processing steps to search for instanced meshes
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*/
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class FindInstancesProcess : public BaseProcess
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{
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public:
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FindInstancesProcess();
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~FindInstancesProcess();
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public:
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// -------------------------------------------------------------------
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// Check whether step is active in given flags combination
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bool IsActive( unsigned int pFlags) const;
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// -------------------------------------------------------------------
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// Execute step on a given scene
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void Execute( aiScene* pScene);
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// -------------------------------------------------------------------
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// Setup properties prior to executing the process
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void SetupProperties(const Importer* pImp);
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private:
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bool configSpeedFlag;
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}; // ! end class FindInstancesProcess
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} // ! end namespace Assimp
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#endif // !! AI_FINDINSTANCES_H_INC
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