Cleanup: Alembic export, split function into two

Split the `ABCHierarchyIterator::create_data_writer()` function into two
functions. This is to prepare for the creation of writers not just by
object type, but also by goal, for example writers that reference other
Alembic data instead of writing their own (i.e. instancing).

No functional changes.

1 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/io/alembic/exporter/abc_hierarchy_iterator.h b/source/blender/io/alembic/exporter/abc_hierarchy_iterator.h
index bd7e3f27c67..b8abfd74c4c 100644
--- a/source/blender/io/alembic/exporter/abc_hierarchy_iterator.h
+++ b/source/blender/io/alembic/exporter/abc_hierarchy_iterator.h
@@ -36,6 +36,7 @@ namespace blender {
 namespace io {
 namespace alembic {
 
+class ABCAbstractWriter;
 class ABCHierarchyIterator;
 
 struct ABCWriterConstructorArgs {
@@ -85,6 +86,9 @@ class ABCHierarchyIterator : public AbstractHierarchyIterator {
   ABCWriterConstructorArgs writer_constructor_args(const HierarchyContext *context) const;
   void update_archive_bounding_box();
   void update_bounding_box_recursive(Imath::Box3d &bounds, const HierarchyContext *context);
+
+  ABCAbstractWriter *create_data_writer_for_object_type(
+      const HierarchyContext *context, const ABCWriterConstructorArgs &writer_args);
 };
 
 }  // namespace alembic