1 files changed, 110 insertions, 0 deletions
diff --git a/source/blender/io/alembic/exporter/abc_writer_camera.cc b/source/blender/io/alembic/exporter/abc_writer_camera.cc
new file mode 100644
index 00000000000..7e7277cb4ea
--- /dev/null
+++ b/source/blender/io/alembic/exporter/abc_writer_camera.cc
@@ -0,0 +1,110 @@
+/*
+ * 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_camera.h"
+#include "abc_hierarchy_iterator.h"
+
+#include "BKE_camera.h"
+
+#include "BLI_assert.h"
+
+#include "DNA_camera_types.h"
+#include "DNA_scene_types.h"
+
+#include "CLG_log.h"
+static CLG_LogRef LOG = {"io.alembic"};
+
+namespace blender {
+namespace io {
+namespace alembic {
+
+using Alembic::AbcGeom::CameraSample;
+using Alembic::AbcGeom::OCamera;
+using Alembic::AbcGeom::OFloatProperty;
+
+ABCCameraWriter::ABCCameraWriter(const ABCWriterConstructorArgs &args) : ABCAbstractWriter(args)
+{
+}
+
+bool ABCCameraWriter::is_supported(const HierarchyContext *context) const
+{
+  Camera *camera = static_cast<Camera *>(context->object->data);
+  return camera->type == CAM_PERSP;
+}
+
+void ABCCameraWriter::create_alembic_objects(const HierarchyContext * /*context*/)
+{
+  CLOG_INFO(&LOG, 2, "exporting %s", args_.abc_path.c_str());
+  abc_camera_ = OCamera(args_.abc_parent, args_.abc_name, timesample_index_);
+  abc_camera_schema_ = abc_camera_.getSchema();
+
+  abc_custom_data_container_ = abc_camera_schema_.getUserProperties();
+  abc_stereo_distance_ = OFloatProperty(
+      abc_custom_data_container_, "stereoDistance", timesample_index_);
+  abc_eye_separation_ = OFloatProperty(
+      abc_custom_data_container_, "eyeSeparation", timesample_index_);
+}
+
+const Alembic::Abc::OObject ABCCameraWriter::get_alembic_object() const
+{
+  return abc_camera_;
+}
+
+void ABCCameraWriter::do_write(HierarchyContext &context)
+{
+  Camera *cam = static_cast<Camera *>(context.object->data);
+
+  abc_stereo_distance_.set(cam->stereo.convergence_distance);
+  abc_eye_separation_.set(cam->stereo.interocular_distance);
+
+  const double apperture_x = cam->sensor_x / 10.0;
+  const double apperture_y = cam->sensor_y / 10.0;
+  const double film_aspect = apperture_x / apperture_y;
+
+  CameraSample camera_sample;
+  camera_sample.setFocalLength(cam->lens);
+  camera_sample.setHorizontalAperture(apperture_x);
+  camera_sample.setVerticalAperture(apperture_y);
+  camera_sample.setHorizontalFilmOffset(apperture_x * cam->shiftx);
+  camera_sample.setVerticalFilmOffset(apperture_y * cam->shifty * film_aspect);
+  camera_sample.setNearClippingPlane(cam->clip_start);
+  camera_sample.setFarClippingPlane(cam->clip_end);
+
+  if (cam->dof.focus_object) {
+    Imath::V3f v(context.object->loc[0] - cam->dof.focus_object->loc[0],
+                 context.object->loc[1] - cam->dof.focus_object->loc[1],
+                 context.object->loc[2] - cam->dof.focus_object->loc[2]);
+    camera_sample.setFocusDistance(v.length());
+  }
+  else {
+    camera_sample.setFocusDistance(cam->dof.focus_distance);
+  }
+
+  /* Blender camera does not have an fstop param, so try to find a custom prop
+   * instead. */
+  camera_sample.setFStop(cam->dof.aperture_fstop);
+
+  camera_sample.setLensSqueezeRatio(1.0);
+  abc_camera_schema_.set(camera_sample);
+}
+
+}  // namespace alembic
+}  // namespace io
+}  // namespace blender