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Diffstat (limited to 'libs/assimp/code/PostProcessing/TextureTransform.h')
| -rw-r--r-- | libs/assimp/code/PostProcessing/TextureTransform.h | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/libs/assimp/code/PostProcessing/TextureTransform.h b/libs/assimp/code/PostProcessing/TextureTransform.h new file mode 100644 index 0000000..c1cccf8 --- /dev/null +++ b/libs/assimp/code/PostProcessing/TextureTransform.h @@ -0,0 +1,232 @@ +/* +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 Definition of a helper step that processes texture transformations */ +#ifndef AI_TEXTURE_TRANSFORM_H_INCLUDED +#define AI_TEXTURE_TRANSFORM_H_INCLUDED + +#include <assimp/BaseImporter.h> +#include "Common/BaseProcess.h" + +#include <assimp/material.h> +#include <list> + +struct aiNode; +struct aiMaterial; + +namespace Assimp { + +#define AI_TT_UV_IDX_LOCK_TBD 0xffffffff +#define AI_TT_UV_IDX_LOCK_NONE 0xeeeeeeee + + +#define AI_TT_ROTATION_EPSILON ((float)AI_DEG_TO_RAD(0.5)) + +// --------------------------------------------------------------------------- +/** Small helper structure representing a shortcut into the material list + * to be able to update some values quickly. +*/ +struct TTUpdateInfo { + TTUpdateInfo() AI_NO_EXCEPT + : directShortcut(nullptr) + , mat(nullptr) + , semantic(0) + , index(0) { + // empty + } + + //! Direct shortcut, if available + unsigned int* directShortcut; + + //! Material + aiMaterial *mat; + + //! Texture type and index + unsigned int semantic, index; +}; + + +// --------------------------------------------------------------------------- +/** Helper class representing texture coordinate transformations +*/ +struct STransformVecInfo : public aiUVTransform { + STransformVecInfo() AI_NO_EXCEPT + : uvIndex(0) + , mapU(aiTextureMapMode_Wrap) + , mapV(aiTextureMapMode_Wrap) + , lockedPos(AI_TT_UV_IDX_LOCK_NONE) { + // empty + } + + //! Source texture coordinate index + unsigned int uvIndex; + + //! Texture mapping mode in the u, v direction + aiTextureMapMode mapU,mapV; + + //! Locked destination UV index + //! AI_TT_UV_IDX_LOCK_TBD - to be determined + //! AI_TT_UV_IDX_LOCK_NONE - none (default) + unsigned int lockedPos; + + //! Update info - shortcuts into all materials + //! that are referencing this transform setup + std::list<TTUpdateInfo> updateList; + + + // ------------------------------------------------------------------- + /** Compare two transform setups + */ + inline bool operator== (const STransformVecInfo& other) const + { + // We use a small epsilon here + const static float epsilon = 0.05f; + + if (std::fabs( mTranslation.x - other.mTranslation.x ) > epsilon || + std::fabs( mTranslation.y - other.mTranslation.y ) > epsilon) + { + return false; + } + + if (std::fabs( mScaling.x - other.mScaling.x ) > epsilon || + std::fabs( mScaling.y - other.mScaling.y ) > epsilon) + { + return false; + } + + if (std::fabs( mRotation - other.mRotation) > epsilon) + { + return false; + } + return true; + } + + inline bool operator!= (const STransformVecInfo& other) const + { + return !(*this == other); + } + + + // ------------------------------------------------------------------- + /** Returns whether this is an untransformed texture coordinate set + */ + inline bool IsUntransformed() const + { + return (1.0f == mScaling.x && 1.f == mScaling.y && + !mTranslation.x && !mTranslation.y && + mRotation < AI_TT_ROTATION_EPSILON); + } + + // ------------------------------------------------------------------- + /** Build a 3x3 matrix from the transformations + */ + inline void GetMatrix(aiMatrix3x3& mOut) + { + mOut = aiMatrix3x3(); + + if (1.0f != mScaling.x || 1.0f != mScaling.y) + { + aiMatrix3x3 mScale; + mScale.a1 = mScaling.x; + mScale.b2 = mScaling.y; + mOut = mScale; + } + if (mRotation) + { + aiMatrix3x3 mRot; + mRot.a1 = mRot.b2 = std::cos(mRotation); + mRot.a2 = mRot.b1 = std::sin(mRotation); + mRot.a2 = -mRot.a2; + mOut *= mRot; + } + if (mTranslation.x || mTranslation.y) + { + aiMatrix3x3 mTrans; + mTrans.a3 = mTranslation.x; + mTrans.b3 = mTranslation.y; + mOut *= mTrans; + } + } +}; + + +// --------------------------------------------------------------------------- +/** Helper step to compute final UV coordinate sets if there are scalings + * or rotations in the original data read from the file. +*/ +class TextureTransformStep : public BaseProcess +{ +public: + + TextureTransformStep(); + ~TextureTransformStep(); + +public: + + // ------------------------------------------------------------------- + bool IsActive( unsigned int pFlags) const; + + // ------------------------------------------------------------------- + void Execute( aiScene* pScene); + + // ------------------------------------------------------------------- + void SetupProperties(const Importer* pImp); + + +protected: + + + // ------------------------------------------------------------------- + /** Preprocess a specific UV transformation setup + * + * @param info Transformation setup to be preprocessed. + */ + void PreProcessUVTransform(STransformVecInfo& info); + +private: + + unsigned int configFlags; +}; + +} + +#endif //! AI_TEXTURE_TRANSFORM_H_INCLUDED |