1 files changed, 74 insertions, 0 deletions
diff --git a/source/blender/io/alembic/exporter/abc_writer_instance.cc b/source/blender/io/alembic/exporter/abc_writer_instance.cc
new file mode 100644
index 00000000000..581d94ee961
--- /dev/null
+++ b/source/blender/io/alembic/exporter/abc_writer_instance.cc
@@ -0,0 +1,74 @@
+/*
+ * 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.
+ */
+
+/** \file
+ * \ingroup balembic
+ */
+
+#include "abc_writer_instance.h"
+#include "abc_hierarchy_iterator.h"
+
+#include "BLI_assert.h"
+
+#include "CLG_log.h"
+static CLG_LogRef LOG = {"io.alembic"};
+
+namespace blender {
+namespace io {
+namespace alembic {
+
+using Alembic::Abc::OObject;
+
+ABCInstanceWriter::ABCInstanceWriter(const ABCWriterConstructorArgs &args)
+    : ABCAbstractWriter(args)
+{
+}
+
+ABCInstanceWriter::~ABCInstanceWriter()
+{
+}
+
+void ABCInstanceWriter::create_alembic_objects(const HierarchyContext *context)
+{
+  OObject original = args_.hierarchy_iterator->get_alembic_object(context->original_export_path);
+  OObject abc_parent = args_.abc_parent;
+  if (!abc_parent.addChildInstance(original, args_.abc_name)) {
+    CLOG_WARN(&LOG, "unable to export %s as instance", args_.abc_path.c_str());
+    return;
+  }
+  CLOG_INFO(&LOG, 2, "exporting instance %s", args_.abc_path.c_str());
+}
+
+OObject ABCInstanceWriter::get_alembic_object() const
+{
+  /* There is no OObject for an instance. */
+  BLI_assert(!"ABCInstanceWriter cannot return its Alembic OObject");
+  return OObject();
+}
+
+bool ABCInstanceWriter::is_supported(const HierarchyContext *context) const
+{
+  return context->is_instance();
+}
+
+void ABCInstanceWriter::do_write(HierarchyContext & /*context*/)
+{
+  /* Instances don't have data to be written. Just creating them is enough. */
+}
+
+}  // namespace alembic
+}  // namespace io
+}  // namespace blender