Project Pampa request: FCurves normalized display

Added two options to a header of FCurve editor:

- Normalize which makes it so every individual
  curve is fit into -1..1 space.

- Auto-normalize, which probably is to be called
  "Lock" which "locks" curve normalization scale.
  This is useful to prevent curves from jumping
  around when tweaking it.

It's debatable whether it need to be a button to
normalize curves n purpose only, and it's fully
depends on animator's workflow.

Here during Project Pampa we've got Francesco
who get used to auto-renormalization and Hjalti
who prefers locked behavior.

Docs are to be ready soon by Francesco.
Thanks Brecht for the review!

1 files changed, 10 insertions, 1 deletions

diff --git a/source/blender/editors/include/ED_anim_api.h b/source/blender/editors/include/ED_anim_api.h
index d23c57273ec..d98fa1fc32f 100644
--- a/source/blender/editors/include/ED_anim_api.h
+++ b/source/blender/editors/include/ED_anim_api.h
@@ -559,10 +559,19 @@ typedef enum eAnimUnitConv_Flags {
 	/* only touch selected vertices */
 	ANIM_UNITCONV_SELVERTS  = (1 << 3),
 	ANIM_UNITCONV_SKIPKNOTS  = (1 << 4),
+	/* Scale FCurve i a way it fits to -1..1 space */
+	ANIM_UNITCONV_NORMALIZE  = (1 << 5),
+	/* Only whennormalization is used: use scale factor from previous run,
+	 * prevents curves from jumping all over the place when tweaking them.
+	 */
+	ANIM_UNITCONV_NORMALIZE_FREEZE  = (1 << 6),
 } eAnimUnitConv_Flags;
 
+/* Normalizatin flags from Space Graph passing to ANIM_unit_mapping_get_factor */
+short ANIM_get_normalization_flags(bAnimContext *ac);
+
 /* Get unit conversion factor for given ID + F-Curve */
-float ANIM_unit_mapping_get_factor(struct Scene *scene, struct ID *id, struct FCurve *fcu, short restore);
+float ANIM_unit_mapping_get_factor(struct Scene *scene, struct ID *id, struct FCurve *fcu, short flag);
 
 /* ------------- Utility macros ----------------------- */