Implement a user preference for the default Auto Handle Smoothing mode.

The default was changed with an initial implementation of the feature.

With the feedback from animators, having a behavior which affects curves
outside of a changing range is not convenient for professional animators
working on high quality character animation. On the other hand, automatic
smoothing is better for casual animation of object motion.

This change adds an ability to change the default via User Preferences.

Differential Revision: https://developer.blender.org/D5875

1 files changed, 10 insertions, 4 deletions

diff --git a/source/blender/blenloader/intern/versioning_userdef.c b/source/blender/blenloader/intern/versioning_userdef.c
index e769e72d8e1..3eaf45954f3 100644
--- a/source/blender/blenloader/intern/versioning_userdef.c
+++ b/source/blender/blenloader/intern/versioning_userdef.c
@@ -30,6 +30,7 @@
 #include "DNA_windowmanager_types.h"
 #include "DNA_scene_types.h"
 #include "DNA_space_types.h"
+#include "DNA_anim_types.h"
 
 #include "BKE_addon.h"
 #include "BKE_colorband.h"
@@ -624,15 +625,20 @@ void BLO_version_defaults_userpref_blend(Main *bmain, UserDef *userdef)
     userdef->filebrowser_display_type = USER_TEMP_SPACE_DISPLAY_WINDOW;
   }
 
+  if (!USER_VERSION_ATLEAST(281, 13)) {
+    userdef->auto_smoothing_new = FCURVE_SMOOTH_CONT_ACCEL;
+
+    if (userdef->file_space_data.display_type == FILE_DEFAULTDISPLAY) {
+      memcpy(
+          &userdef->file_space_data, &U_default.file_space_data, sizeof(userdef->file_space_data));
+    }
+  }
+
   /**
    * Include next version bump.
    */
   {
     /* pass */
-    if (userdef->file_space_data.display_type == FILE_DEFAULTDISPLAY) {
-      memcpy(
-          &userdef->file_space_data, &U_default.file_space_data, sizeof(userdef->file_space_data));
-    }
   }
 
   if (userdef->pixelsize == 0.0f) {