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Diffstat (limited to 'libs/assimp/code/AssetLib/Blender/BlenderBMesh.cpp')
| -rw-r--r-- | libs/assimp/code/AssetLib/Blender/BlenderBMesh.cpp | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/libs/assimp/code/AssetLib/Blender/BlenderBMesh.cpp b/libs/assimp/code/AssetLib/Blender/BlenderBMesh.cpp new file mode 100644 index 0000000..be536eb --- /dev/null +++ b/libs/assimp/code/AssetLib/Blender/BlenderBMesh.cpp @@ -0,0 +1,184 @@ +/* +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 BlenderBMesh.cpp + * @brief Conversion of Blender's new BMesh stuff + */ + +#ifndef ASSIMP_BUILD_NO_BLEND_IMPORTER + +#include "BlenderBMesh.h" +#include "BlenderDNA.h" +#include "BlenderScene.h" +#include "BlenderTessellator.h" + +namespace Assimp { +template <> +const char *LogFunctions<BlenderBMeshConverter>::Prefix() { + static auto prefix = "BLEND_BMESH: "; + return prefix; +} +} // namespace Assimp + +using namespace Assimp; +using namespace Assimp::Blender; +using namespace Assimp::Formatter; + +// ------------------------------------------------------------------------------------------------ +BlenderBMeshConverter::BlenderBMeshConverter(const Mesh *mesh) : + BMesh(mesh), + triMesh(nullptr) { + ai_assert(nullptr != mesh); +} + +// ------------------------------------------------------------------------------------------------ +BlenderBMeshConverter::~BlenderBMeshConverter() { + DestroyTriMesh(); +} + +// ------------------------------------------------------------------------------------------------ +bool BlenderBMeshConverter::ContainsBMesh() const { + // TODO - Should probably do some additional verification here + return BMesh->totpoly && BMesh->totloop && BMesh->totvert; +} + +// ------------------------------------------------------------------------------------------------ +const Mesh *BlenderBMeshConverter::TriangulateBMesh() { + AssertValidMesh(); + AssertValidSizes(); + PrepareTriMesh(); + + for (int i = 0; i < BMesh->totpoly; ++i) { + const MPoly &poly = BMesh->mpoly[i]; + ConvertPolyToFaces(poly); + } + + return triMesh; +} + +// ------------------------------------------------------------------------------------------------ +void BlenderBMeshConverter::AssertValidMesh() { + if (!ContainsBMesh()) { + ThrowException("BlenderBMeshConverter requires a BMesh with \"polygons\" - please call BlenderBMeshConverter::ContainsBMesh to check this first"); + } +} + +// ------------------------------------------------------------------------------------------------ +void BlenderBMeshConverter::AssertValidSizes() { + if (BMesh->totpoly != static_cast<int>(BMesh->mpoly.size())) { + ThrowException("BMesh poly array has incorrect size"); + } + if (BMesh->totloop != static_cast<int>(BMesh->mloop.size())) { + ThrowException("BMesh loop array has incorrect size"); + } +} + +// ------------------------------------------------------------------------------------------------ +void BlenderBMeshConverter::PrepareTriMesh() { + if (triMesh) { + DestroyTriMesh(); + } + + triMesh = new Mesh(*BMesh); + triMesh->totface = 0; + triMesh->mface.clear(); +} + +// ------------------------------------------------------------------------------------------------ +void BlenderBMeshConverter::DestroyTriMesh() { + delete triMesh; + triMesh = nullptr; +} + +// ------------------------------------------------------------------------------------------------ +void BlenderBMeshConverter::ConvertPolyToFaces(const MPoly &poly) { + const MLoop *polyLoop = &BMesh->mloop[poly.loopstart]; + + if (poly.totloop == 3 || poly.totloop == 4) { + AddFace(polyLoop[0].v, polyLoop[1].v, polyLoop[2].v, poly.totloop == 4 ? polyLoop[3].v : 0); + + // UVs are optional, so only convert when present. + if (BMesh->mloopuv.size()) { + if ((poly.loopstart + poly.totloop) > static_cast<int>(BMesh->mloopuv.size())) { + ThrowException("BMesh uv loop array has incorrect size"); + } + const MLoopUV *loopUV = &BMesh->mloopuv[poly.loopstart]; + AddTFace(loopUV[0].uv, loopUV[1].uv, loopUV[2].uv, poly.totloop == 4 ? loopUV[3].uv : 0); + } + } else if (poly.totloop > 4) { +#if ASSIMP_BLEND_WITH_GLU_TESSELLATE + BlenderTessellatorGL tessGL(*this); + tessGL.Tessellate(polyLoop, poly.totloop, triMesh->mvert); +#elif ASSIMP_BLEND_WITH_POLY_2_TRI + BlenderTessellatorP2T tessP2T(*this); + tessP2T.Tessellate(polyLoop, poly.totloop, triMesh->mvert); +#endif + } +} + +// ------------------------------------------------------------------------------------------------ +void BlenderBMeshConverter::AddFace(int v1, int v2, int v3, int v4) { + MFace face; + face.v1 = v1; + face.v2 = v2; + face.v3 = v3; + face.v4 = v4; + face.flag = 0; + // TODO - Work out how materials work + face.mat_nr = 0; + triMesh->mface.push_back(face); + triMesh->totface = static_cast<int>(triMesh->mface.size()); +} + +// ------------------------------------------------------------------------------------------------ +void BlenderBMeshConverter::AddTFace(const float *uv1, const float *uv2, const float *uv3, const float *uv4) { + MTFace mtface; + memcpy(&mtface.uv[0], uv1, sizeof(float) * 2); + memcpy(&mtface.uv[1], uv2, sizeof(float) * 2); + memcpy(&mtface.uv[2], uv3, sizeof(float) * 2); + + if (uv4) { + memcpy(&mtface.uv[3], uv4, sizeof(float) * 2); + } + + triMesh->mtface.push_back(mtface); +} + +#endif // ASSIMP_BUILD_NO_BLEND_IMPORTER |