abc_customdata.h

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/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2016 Kévin Dietrich.
 * All rights reserved.
 */
#pragma once
 
#include <Alembic/Abc/All.h>
#include <Alembic/AbcGeom/All.h>
 
#include <map>
 
struct CustomData;
struct MLoop;
struct MLoopUV;
struct MPoly;
struct MVert;
struct Mesh;
 
using Alembic::Abc::ICompoundProperty;
using Alembic::Abc::OCompoundProperty;
namespace blender::io::alembic {
 
struct UVSample {
  std::vector<Imath::V2f> uvs;
  std::vector<uint32_t> indices;
};
 
struct CDStreamConfig {
  MLoop *mloop;
  int totloop;
 
  MPoly *mpoly;
  int totpoly;
 
  MVert *mvert;
  int totvert;
 
  MLoopUV *mloopuv;
 
  CustomData *loopdata;
 
  bool pack_uvs;
 
  /* TODO(kevin): might need a better way to handle adding and/or updating
   * custom data such that it updates the custom data holder and its pointers properly. */
  Mesh *mesh;
  void *(*add_customdata_cb)(Mesh *mesh, const char *name, int data_type);
 
  float weight;
  float time;
  bool use_vertex_interpolation;
  Alembic::AbcGeom::index_t index;
  Alembic::AbcGeom::index_t ceil_index;
 
  const char **modifier_error_message;
 
  /* Alembic needs Blender to keep references to C++ objects (the destructors
   * finalize the writing to ABC). This map stores OV2fGeomParam objects for the
   * 2nd and subsequent UV maps; the primary UV map is kept alive by the Alembic
   * mesh sample itself. */
  std::map<std::string, Alembic::AbcGeom::OV2fGeomParam> abc_uv_maps;
 
  CDStreamConfig()
      : mloop(NULL),
        totloop(0),
        mpoly(NULL),
        totpoly(0),
        totvert(0),
        pack_uvs(false),
        mesh(NULL),
        add_customdata_cb(NULL),
        weight(0.0f),
        time(0.0f),
        index(0),
        ceil_index(0),
        modifier_error_message(NULL)
  {
  }
};
 
/* Get the UVs for the main UV property on a OSchema.
 * Returns the name of the UV layer.
 *
 * For now the active layer is used, maybe needs a better way to choose this. */
const char *get_uv_sample(UVSample &sample, const CDStreamConfig &config, CustomData *data);
 
void write_custom_data(const OCompoundProperty &prop,
                       CDStreamConfig &config,
                       CustomData *data,
                       int data_type);
 
void read_custom_data(const std::string &iobject_full_name,
                      const ICompoundProperty &prop,
                      const CDStreamConfig &config,
                      const Alembic::Abc::ISampleSelector &iss);
 
}  // namespace blender::io::alembic