| /* |
| Open Asset Import Library (assimp) |
| ---------------------------------------------------------------------- |
| |
| Copyright (c) 2006-2017, 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 |
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| (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.h |
| * @brief Defines a bunch of post-processing steps to handle |
| * coordinate system conversions. |
| * |
| * - LH to RH |
| * - UV origin upper-left to lower-left |
| * - face order cw to ccw |
| */ |
| #ifndef AI_CONVERTTOLHPROCESS_H_INC |
| #define AI_CONVERTTOLHPROCESS_H_INC |
| |
| #include <assimp/types.h> |
| #include "BaseProcess.h" |
| |
| struct aiMesh; |
| struct aiNodeAnim; |
| struct aiNode; |
| struct aiMaterial; |
| |
| namespace Assimp { |
| |
| // ----------------------------------------------------------------------------------- |
| /** @brief The MakeLeftHandedProcess converts all imported data to a left-handed |
| * coordinate system. |
| * |
| * This implies a mirroring of the Z axis of the coordinate system. But to keep |
| * transformation matrices free from reflections we shift the reflection to other |
| * places. We mirror the meshes and adapt the rotations. |
| * |
| * @note RH-LH and LH-RH is the same, so this class can be used for both |
| */ |
| class MakeLeftHandedProcess : public BaseProcess |
| { |
| |
| |
| public: |
| MakeLeftHandedProcess(); |
| ~MakeLeftHandedProcess(); |
| |
| // ------------------------------------------------------------------- |
| bool IsActive( unsigned int pFlags) const; |
| |
| // ------------------------------------------------------------------- |
| void Execute( aiScene* pScene); |
| |
| protected: |
| |
| // ------------------------------------------------------------------- |
| /** Recursively converts a node and all of its children |
| */ |
| void ProcessNode( aiNode* pNode, const aiMatrix4x4& pParentGlobalRotation); |
| |
| // ------------------------------------------------------------------- |
| /** Converts a single mesh to left handed coordinates. |
| * This means that positions, normals and tangents are mirrored at |
| * the local Z axis and the order of all faces are inverted. |
| * @param pMesh The mesh to convert. |
| */ |
| void ProcessMesh( aiMesh* pMesh); |
| |
| // ------------------------------------------------------------------- |
| /** Converts a single material to left-handed coordinates |
| * @param pMat Material to convert |
| */ |
| void ProcessMaterial( aiMaterial* pMat); |
| |
| // ------------------------------------------------------------------- |
| /** Converts the given animation to LH coordinates. |
| * The rotation and translation keys are transformed, the scale keys |
| * work in local space and can therefore be left untouched. |
| * @param pAnim The bone animation to transform |
| */ |
| void ProcessAnimation( aiNodeAnim* pAnim); |
| }; |
| |
| |
| // --------------------------------------------------------------------------- |
| /** Postprocessing step to flip the face order of the imported data |
| */ |
| class FlipWindingOrderProcess : public BaseProcess |
| { |
| friend class Importer; |
| |
| public: |
| /** Constructor to be privately used by Importer */ |
| FlipWindingOrderProcess(); |
| |
| /** Destructor, private as well */ |
| ~FlipWindingOrderProcess(); |
| |
| // ------------------------------------------------------------------- |
| bool IsActive( unsigned int pFlags) const; |
| |
| // ------------------------------------------------------------------- |
| void Execute( aiScene* pScene); |
| |
| protected: |
| void ProcessMesh( aiMesh* pMesh); |
| }; |
| |
| // --------------------------------------------------------------------------- |
| /** Postprocessing step to flip the UV coordinate system of the import data |
| */ |
| class FlipUVsProcess : public BaseProcess |
| { |
| friend class Importer; |
| |
| public: |
| /** Constructor to be privately used by Importer */ |
| FlipUVsProcess(); |
| |
| /** Destructor, private as well */ |
| ~FlipUVsProcess(); |
| |
| // ------------------------------------------------------------------- |
| bool IsActive( unsigned int pFlags) const; |
| |
| // ------------------------------------------------------------------- |
| void Execute( aiScene* pScene); |
| |
| protected: |
| void ProcessMesh( aiMesh* pMesh); |
| void ProcessMaterial( aiMaterial* mat); |
| }; |
| |
| } // end of namespace Assimp |
| |
| #endif // AI_CONVERTTOLHPROCESS_H_INC |