1 files changed, 76 insertions, 0 deletions
diff --git a/source/blender/io/alembic/intern/abc_reader_transform.cc b/source/blender/io/alembic/intern/abc_reader_transform.cc
new file mode 100644
index 00000000000..ce569a9ccb5
--- /dev/null
+++ b/source/blender/io/alembic/intern/abc_reader_transform.cc
@@ -0,0 +1,76 @@
+/*
+ * 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_reader_transform.h"
+#include "abc_util.h"
+
+extern "C" {
+#include "DNA_object_types.h"
+
+#include "BLI_utildefines.h"
+
+#include "BKE_object.h"
+}
+
+using Alembic::Abc::ISampleSelector;
+
+AbcEmptyReader::AbcEmptyReader(const Alembic::Abc::IObject &object, ImportSettings &settings)
+    : AbcObjectReader(object, settings)
+{
+  /* Empties have no data. It makes the import of Alembic files easier to
+   * understand when we name the empty after its name in Alembic. */
+  m_object_name = object.getName();
+
+  Alembic::AbcGeom::IXform xform(object, Alembic::AbcGeom::kWrapExisting);
+  m_schema = xform.getSchema();
+
+  get_min_max_time(m_iobject, m_schema, m_min_time, m_max_time);
+}
+
+bool AbcEmptyReader::valid() const
+{
+  return m_schema.valid();
+}
+
+bool AbcEmptyReader::accepts_object_type(
+    const Alembic::AbcCoreAbstract::ObjectHeader &alembic_header,
+    const Object *const ob,
+    const char **err_str) const
+{
+  if (!Alembic::AbcGeom::IXform::matches(alembic_header)) {
+    *err_str =
+        "Object type mismatch, Alembic object path pointed to XForm when importing, but not any "
+        "more.";
+    return false;
+  }
+
+  if (ob->type != OB_EMPTY) {
+    *err_str = "Object type mismatch, Alembic object path points to XForm.";
+    return false;
+  }
+
+  return true;
+}
+
+void AbcEmptyReader::readObjectData(Main *bmain, const ISampleSelector &UNUSED(sample_sel))
+{
+  m_object = BKE_object_add_only_object(bmain, OB_EMPTY, m_object_name.c_str());
+  m_object->data = NULL;
+}