bb
157c6af18e
Avoid cases of filenames Update years in terms and other legal(ish) documents Don't update years in license headers, since change is not meaningful Will add linter rule in seperate commit Happy recompiling everyone! Original Patch By: Nescio Comment By: Gallaecio Differential Revision: D2620 This was SVN commit r27786.
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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