Commit: 8c0a4324100efdc255317d4cd9bcf965bab1c457
Author: Kévin Dietrich
Date: Sat Jun 11 12:01:32 2016 +0200
Branches: alembic_basic_io
https://developer.blender.org/rB8c0a4324100efdc255317d4cd9bcf965bab1c457
Fix for accumulated camera specific transformations in a camera
hierarchy.
Only apply the transform to the root camera.
===================================================================
M source/blender/alembic/intern/abc_transform.cc
===================================================================
diff --git a/source/blender/alembic/intern/abc_transform.cc
b/source/blender/alembic/intern/abc_transform.cc
index 0a1a531..b7c9993 100644
--- a/source/blender/alembic/intern/abc_transform.cc
+++ b/source/blender/alembic/intern/abc_transform.cc
@@ -39,6 +39,23 @@ using Alembic::AbcGeom::OXform;
/* **************************************************************************
*/
+static bool has_parent_camera(Object *ob)
+{
+ if (!ob->parent) {
+ return false;
+ }
+
+ Object *parent = ob->parent;
+
+ if (parent->type == OB_CAMERA) {
+ return true;
+ }
+
+ return has_parent_camera(parent);
+}
+
+/* **************************************************************************
*/
+
AbcTransformWriter::AbcTransformWriter(Object *ob,
const OObject &abc_parent,
AbcTransformWriter *parent,
@@ -81,7 +98,8 @@ void AbcTransformWriter::do_write()
float mat[4][4];
create_transform_matrix(m_object, mat);
- if (m_object->type == OB_CAMERA) {
+ /* Only apply rotation to root camera, parenting will propagate it. */
+ if (m_object->type == OB_CAMERA && !has_parent_camera(m_object)) {
float rot_mat[4][4];
unit_m4(rot_mat);
rotate_m4(rot_mat, 'X', -M_PI_2);
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