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Diffstat (limited to 'source/blender/io/usd/intern/usd_reader_prim.h')
-rw-r--r-- | source/blender/io/usd/intern/usd_reader_prim.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/source/blender/io/usd/intern/usd_reader_prim.h b/source/blender/io/usd/intern/usd_reader_prim.h new file mode 100644 index 00000000000..5aff52f011f --- /dev/null +++ b/source/blender/io/usd/intern/usd_reader_prim.h @@ -0,0 +1,131 @@ +/* + * 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. + * + * Adapted from the Blender Alembic importer implementation. + * + * Modifications Copyright (C) 2021 Tangent Animation. + * All rights reserved. + */ +#pragma once + +#include "usd.h" + +#include <pxr/usd/usd/prim.h> + +struct Main; +struct Object; + +namespace blender::io::usd { + +struct ImportSettings { + bool do_convert_mat; + float conversion_mat[4][4]; + + int from_up; + int from_forward; + float scale; + bool is_sequence; + bool set_frame_range; + + /* Length and frame offset of file sequences. */ + int sequence_len; + int sequence_offset; + + /* From MeshSeqCacheModifierData.read_flag */ + int read_flag; + + bool validate_meshes; + + CacheFile *cache_file; + + ImportSettings() + : do_convert_mat(false), + from_up(0), + from_forward(0), + scale(1.0f), + is_sequence(false), + set_frame_range(false), + sequence_len(1), + sequence_offset(0), + read_flag(0), + validate_meshes(false), + cache_file(NULL) + { + } +}; + +/* Most generic USD Reader. */ + +class USDPrimReader { + + protected: + std::string name_; + std::string prim_path_; + Object *object_; + pxr::UsdPrim prim_; + const USDImportParams &import_params_; + USDPrimReader *parent_reader_; + const ImportSettings *settings_; + int refcount_; + + public: + USDPrimReader(const pxr::UsdPrim &prim, + const USDImportParams &import_params, + const ImportSettings &settings); + virtual ~USDPrimReader(); + + const pxr::UsdPrim &prim() const; + + virtual bool valid() const; + + virtual void create_object(Main *bmain, double motionSampleTime) = 0; + virtual void read_object_data(Main * /* bmain */, double /* motionSampleTime */){}; + + Object *object() const; + void object(Object *ob); + + USDPrimReader *parent() const + { + return parent_reader_; + } + void parent(USDPrimReader *parent) + { + parent_reader_ = parent; + } + + /* Since readers might be referenced through handles + * maintained by modifiers and constraints, we provide + * a reference count to facilitate managing the object + * lifetime. + * TODO(makowalski): investigate transitioning to using + * smart pointers for readers, or, alternatively look into + * making the lifetime management more robust, e.g., by + * making the destructors protected and implementing deletion + * in decref(), etc. */ + int refcount() const; + void incref(); + void decref(); + + const std::string &name() const + { + return name_; + } + const std::string &prim_path() const + { + return prim_path_; + } +}; + +} // namespace blender::io::usd |