148 lines
4.6 KiB
C++
148 lines
4.6 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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int timesample_index;
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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 finalize the writing
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* to ABC). The following fields are all used to keep these references. */
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/* Mapping from UV map name to its ABC property, for the 2nd and subsequent UV maps; the primary
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* UV map is kept alive by the Alembic mesh sample itself. */
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std::map<std::string, Alembic::AbcGeom::OV2fGeomParam> abc_uv_maps;
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/* ORCO coordinates, aka Generated Coordinates. */
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Alembic::AbcGeom::OV3fGeomParam abc_orco;
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/* Mapping from vertex color layer name to its Alembic color data. */
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std::map<std::string, Alembic::AbcGeom::OC4fGeomParam> abc_vertex_colors;
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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_generated_coordinates(const OCompoundProperty &prop, CDStreamConfig &config);
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void read_generated_coordinates(const ICompoundProperty &prop,
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const CDStreamConfig &config,
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const Alembic::Abc::ISampleSelector &iss);
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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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typedef enum {
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ABC_UV_SCOPE_NONE,
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ABC_UV_SCOPE_LOOP,
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ABC_UV_SCOPE_VERTEX,
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} AbcUvScope;
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/**
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* UVs can be defined per-loop (one value per vertex per face), or per-vertex (one value per
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* vertex). The first case is the most common, as this is the standard way of storing this data
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* given that some vertices might be on UV seams and have multiple possible UV coordinates; the
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* second case can happen when the mesh is split according to the UV islands, in which case storing
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* a single UV value per vertex allows to de-duplicate data and thus to reduce the file size since
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* vertices are guaranteed to only have a single UV coordinate.
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*/
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AbcUvScope get_uv_scope(const Alembic::AbcGeom::GeometryScope scope,
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const CDStreamConfig &config,
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const Alembic::AbcGeom::UInt32ArraySamplePtr &indices);
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} // namespace blender::io::alembic
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