1 files changed, 101 insertions, 0 deletions
diff --git a/source/blender/io/alembic/exporter/abc_writer_abstract.cc b/source/blender/io/alembic/exporter/abc_writer_abstract.cc
new file mode 100644
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+++ b/source/blender/io/alembic/exporter/abc_writer_abstract.cc
@@ -0,0 +1,101 @@
+/*
+ * 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) 2020 Blender Foundation.
+ * All rights reserved.
+ */
+#include "abc_writer_abstract.h"
+#include "abc_hierarchy_iterator.h"
+
+#include "BKE_animsys.h"
+#include "BKE_key.h"
+#include "BKE_object.h"
+
+#include "DNA_modifier_types.h"
+
+#include "CLG_log.h"
+static CLG_LogRef LOG = {"io.alembic"};
+
+namespace blender {
+namespace io {
+namespace alembic {
+
+using Alembic::Abc::OObject;
+using Alembic::Abc::TimeSamplingPtr;
+
+ABCAbstractWriter::ABCAbstractWriter(const ABCWriterConstructorArgs &args)
+    : args_(args),
+      frame_has_been_written_(false),
+      is_animated_(false),
+      timesample_index_(args_.abc_archive->time_sampling_index_shapes())
+{
+}
+
+ABCAbstractWriter::~ABCAbstractWriter()
+{
+}
+
+bool ABCAbstractWriter::is_supported(const HierarchyContext * /*context*/) const
+{
+  return true;
+}
+
+void ABCAbstractWriter::write(HierarchyContext &context)
+{
+  if (!frame_has_been_written_) {
+    is_animated_ = (args_.export_params->frame_start != args_.export_params->frame_end) &&
+                   check_is_animated(context);
+  }
+  else if (!is_animated_) {
+    /* A frame has already been written, and without animation one frame is enough. */
+    return;
+  }
+
+  do_write(context);
+
+  frame_has_been_written_ = true;
+}
+
+const Imath::Box3d &ABCAbstractWriter::bounding_box() const
+{
+  return bounding_box_;
+}
+
+void ABCAbstractWriter::update_bounding_box(Object *object)
+{
+  BoundBox *bb = BKE_object_boundbox_get(object);
+
+  if (!bb) {
+    if (object->type != OB_CAMERA) {
+      CLOG_WARN(&LOG, "Bounding box is null!\n");
+    }
+    bounding_box_.min.x = bounding_box_.min.y = bounding_box_.min.z = 0;
+    bounding_box_.max.x = bounding_box_.max.y = bounding_box_.max.z = 0;
+    return;
+  }
+
+  /* Convert Z-up to Y-up. This also changes which vector goes into which min/max property. */
+  bounding_box_.min.x = bb->vec[0][0];
+  bounding_box_.min.y = bb->vec[0][2];
+  bounding_box_.min.z = -bb->vec[6][1];
+
+  bounding_box_.max.x = bb->vec[6][0];
+  bounding_box_.max.y = bb->vec[6][2];
+  bounding_box_.max.z = -bb->vec[0][1];
+}
+
+}  // namespace alembic
+}  // namespace io
+}  // namespace blender