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Diffstat (limited to 'source/blender/io/usd/intern/usd_reader_prim.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.
+ *
+ * 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