bab2260b59
Add an option to disable Alembic vertex interpolation. Bump subversion from 5 to 6. Alembic stores mesh samples at specific time keys; when a frame in Blender maps to a timecode between two samples, Blender will interpolate the mesh vertex positions. This interpolation only happens when the mesh has a constant topology, but sometimes this was not detected properly when the vertices change order, but the number of mesh elements remains the same. This would result in a mesh with jumbled up vertices (T71981). With this patch, users have the ability to disable vertex interpolation. An alternative would be to have better detection of topology changes, but that that'll cause a considerable slowdown. Maniphest Tasks: T71981 Differential Revision: https://developer.blender.org/D9041
116 lines
3.2 KiB
C++
116 lines
3.2 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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 this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2016 Kévin Dietrich.
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* All rights reserved.
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*/
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#pragma once
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/** \file
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* \ingroup balembic
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*/
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#include <Alembic/Abc/All.h>
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#include <Alembic/AbcGeom/All.h>
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#include <map>
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struct CustomData;
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struct MLoop;
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struct MLoopUV;
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struct MPoly;
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struct MVert;
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struct Mesh;
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using Alembic::Abc::ICompoundProperty;
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using Alembic::Abc::OCompoundProperty;
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namespace blender::io::alembic {
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struct UVSample {
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std::vector<Imath::V2f> uvs;
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std::vector<uint32_t> indices;
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};
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struct CDStreamConfig {
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MLoop *mloop;
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int totloop;
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MPoly *mpoly;
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int totpoly;
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MVert *mvert;
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int totvert;
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MLoopUV *mloopuv;
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CustomData *loopdata;
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bool pack_uvs;
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/* TODO(kevin): might need a better way to handle adding and/or updating
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* custom data such that it updates the custom data holder and its pointers properly. */
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Mesh *mesh;
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void *(*add_customdata_cb)(Mesh *mesh, const char *name, int data_type);
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float weight;
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float time;
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bool use_vertex_interpolation;
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Alembic::AbcGeom::index_t index;
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Alembic::AbcGeom::index_t ceil_index;
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const char **modifier_error_message;
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/* Alembic needs Blender to keep references to C++ objects (the destructors
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* finalize the writing to ABC). This map stores OV2fGeomParam objects for the
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* 2nd and subsequent UV maps; the primary UV map is kept alive by the Alembic
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* mesh sample itself. */
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std::map<std::string, Alembic::AbcGeom::OV2fGeomParam> abc_uv_maps;
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CDStreamConfig()
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: mloop(NULL),
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totloop(0),
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mpoly(NULL),
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totpoly(0),
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totvert(0),
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pack_uvs(false),
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mesh(NULL),
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add_customdata_cb(NULL),
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weight(0.0f),
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time(0.0f),
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index(0),
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ceil_index(0),
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modifier_error_message(NULL)
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{
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}
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};
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/* Get the UVs for the main UV property on a OSchema.
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* Returns the name of the UV layer.
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*
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* For now the active layer is used, maybe needs a better way to choose this. */
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const char *get_uv_sample(UVSample &sample, const CDStreamConfig &config, CustomData *data);
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void write_custom_data(const OCompoundProperty &prop,
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CDStreamConfig &config,
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CustomData *data,
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int data_type);
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void read_custom_data(const std::string &iobject_full_name,
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const ICompoundProperty &prop,
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const CDStreamConfig &config,
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const Alembic::Abc::ISampleSelector &iss);
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} // namespace blender::io::alembic
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