vladislavbelov
ffc4a56b9f
Fixes #6846 Differential Revision: https://code.wildfiregames.com/D5185 This was SVN commit r27965.
123 lines
4.7 KiB
C++
123 lines
4.7 KiB
C++
/* Copyright (C) 2021 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INCLUDED_MIKKWRAP
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#define INCLUDED_MIKKWRAP
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#include "graphics/MeshManager.h"
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#include "graphics/ModelDef.h"
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#include "third_party/mikktspace/mikktspace.h"
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#include <vector>
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class MikkTSpace
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{
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public:
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MikkTSpace(const CModelDefPtr& m, std::vector<float>& v, bool gpuSkinning);
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void Generate();
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private:
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SMikkTSpaceInterface m_Interface;
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SMikkTSpaceContext m_Context;
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const CModelDefPtr& m_Model;
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std::vector<float>& m_NewVertices;
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bool m_GpuSkinning;
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/**
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* @param[in] pContext - Pointer to the MikkTSpace context.
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* @returns - the number of faces (triangles/quads) on the mesh to be processed.
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*/
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static int GetNumFaces(const SMikkTSpaceContext* pContext);
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/**
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* @param[in] pContext - Pointer to the MikkTSpace context.
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* @param[in] iFace - Number in the range { 0, 1, ..., getNumFaces() - 1 }.
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* @returns - the number of faces (triangles/quads) on the mesh to be processed.
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*/
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static int GetNumVerticesOfFace(const SMikkTSpaceContext* pContext, const int iFace);
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/**
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* @param[in] pContext - Pointer to the MikkTSpace context.
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* @returns - The MikkTSpace.
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*/
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static MikkTSpace* GetUserDataFromContext(const SMikkTSpaceContext* pContext);
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/**
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* @param[in] pContext - Pointer to the MikkTSpace context.
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* @param[in] iFace - Number in the range { 0, 1, ..., getNumFaces() - 1 }.
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* @param[in] iVert - Number in the range { 0, 1, 2 } for triangles and { 0, 1, 2, 3 } for quads.
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* @returns - The MikkTSpace.
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*/
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static SModelVertex GetVertex(const SMikkTSpaceContext* pContext, const int iFace, const int iVert);
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/**
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* @param[in] pContext - Pointer to the MikkTSpace context.
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* @param[out] fvPosOut - The array containing the face.
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* @param[in] iFace - Number in the range { 0, 1, ..., getNumFaces() - 1 }.
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* @param[in] iVert - Number in the range { 0, 1, 2 } for triangles and { 0, 1, 2, 3 } for quads.
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*/
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static void GetPosition(const SMikkTSpaceContext* pContext,
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float* fvPosOut, const int iFace, const int iVert);
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/**
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* @param[in] pContext - Pointer to the MikkTSpace context.
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* @param[out] fvNormOut iVert - The array containing the normal.
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* @param[in] iFace - Number in the range { 0, 1, ..., getNumFaces() - 1 }.
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* @param[in] iVert - Number in the range { 0, 1, 2 } for triangles and { 0, 1, 2, 3 } for quads.
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*/
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static void GetNormal(const SMikkTSpaceContext* pContext,
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float* fvNormOut, const int iFace, const int iVert);
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/**
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* @param[in] pContext - Pointer to the MikkTSpace context.
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* @param[out] fvTexcOut iVert - Array containing the UV.
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* @param[in] iFace - Number in the range { 0, 1, ..., getNumFaces() - 1 }.
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* @param[in] iVert - Number in the range { 0, 1, 2 } for triangles and { 0, 1, 2, 3 } for quads.
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*/
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static void GetTexCoord(const SMikkTSpaceContext* pContext,
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float* fvTexcOut, const int iFace, const int iVert);
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/**
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* @brief This function is used to return tangent space results to the application.
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* For normal maps it is sufficient to use the following simplified version of the bitangent which is generated at pixel/vertex level.
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* fSign = bIsOrientationPreserving ? 1.0f : (-1.0f);
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* bitangent = fSign * cross(vN, tangent);
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* @param[in] pContext - Pointer to the MikkTSpace context.
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* @param[in] fvTangent - fvTangent - The tangent vector.
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* @param[in] fvBiTangent - The "real" bitangent vector. Not be perpendicular to fvTangent. However, both are perpendicular to the vertex normal.
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* @param[in] fMagS - magniture of the fvTangent vector.
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* @param[in] fMagT - magniture of the fvBiTangent vector.
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* @param[in] bIsOrientationPreserving - Whether the orientation should be preserved.
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* @param[in] iFace - Number in the range {0,1,2} for triangles and {0,1,2,3} for quads.
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* @param[in] iVert - Array containing the position vector of the face.
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*/
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static void SetTSpace(const SMikkTSpaceContext* pContext, const float* fvTangent,
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const float* UNUSED(fvBiTangent), const float UNUSED(fMagS), const float UNUSED(fMagT),
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const tbool bIsOrientationPreserving, const int iFace, const int iVert);
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};
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#endif // INCLUDED_MIKKWRAP
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