Add a Un-Bake FCurves operator

We already had the ability to bake fcurves but no way to convert the
baked result back without using python. This patch adds and operator
that is available now next to the bake operator in the drop down menu,

Reviewed By: Sybren

Differential Revision: http://developer.blender.org/D6379

3 files changed, 71 insertions, 0 deletions

diff --git a/source/blender/editors/space_graph/graph_edit.c b/source/blender/editors/space_graph/graph_edit.c
index b25a275a0ab..753e41b7ec7 100644
--- a/source/blender/editors/space_graph/graph_edit.c
+++ b/source/blender/editors/space_graph/graph_edit.c
@@ -1863,6 +1863,75 @@ void GRAPH_OT_bake(wmOperatorType *ot)
   /* TODO: add props for start/end frames (Joshua Leung 2009) */
 }
 
+/* ******************** Un-Bake F-Curve Operator *********************** */
+/* This operator unbakes the data of the selected F-Points to F-Curves. */
+
+/* Un-Bake F-Points into F-Curves. */
+static void unbake_graph_curves(bAnimContext *ac, int start, int end)
+{
+  ListBase anim_data = {NULL, NULL};
+  bAnimListElem *ale;
+
+  /* Filter data. */
+  const int filter = (ANIMFILTER_DATA_VISIBLE | ANIMFILTER_CURVE_VISIBLE | ANIMFILTER_SEL |
+                      ANIMFILTER_FOREDIT | ANIMFILTER_NODUPLIS);
+  ANIM_animdata_filter(ac, &anim_data, filter, ac->data, ac->datatype);
+
+  /* Loop through filtered data and add keys between selected keyframes on every frame. */
+  for (ale = anim_data.first; ale; ale = ale->next) {
+    FCurve *fcu = (FCurve *)ale->key_data;
+
+    fcurve_samples_to_keyframes(fcu, start, end);
+
+    ale->update |= ANIM_UPDATE_DEPS;
+  }
+
+  ANIM_animdata_update(ac, &anim_data);
+  ANIM_animdata_freelist(&anim_data);
+}
+
+/* ------------------- */
+
+static int graphkeys_unbake_exec(bContext *C, wmOperator *UNUSED(op))
+{
+  bAnimContext ac;
+  Scene *scene = NULL;
+  int start, end;
+
+  /* Get editor data. */
+  if (ANIM_animdata_get_context(C, &ac) == 0) {
+    return OPERATOR_CANCELLED;
+  }
+
+  scene = ac.scene;
+  start = PSFRA;
+  end = PEFRA;
+
+  /* Unbake keyframes. */
+  unbake_graph_curves(&ac, start, end);
+
+  /* Set notifier that keyframes have changed. */
+  /* NOTE: some distinction between order/number of keyframes and type should be made? */
+  WM_event_add_notifier(C, NC_ANIMATION | ND_KEYFRAME | NA_EDITED, NULL);
+
+  return OPERATOR_FINISHED;
+}
+
+void GRAPH_OT_unbake(wmOperatorType *ot)
+{
+  /* Identifiers */
+  ot->name = "Un-Bake Curve";
+  ot->idname = "GRAPH_OT_unbake";
+  ot->description = "Un-Bake selected F-Points to F-Curves";
+
+  /* API callbacks */
+  ot->exec = graphkeys_unbake_exec;
+  ot->poll = graphop_selected_fcurve_poll;
+
+  /* Flags */
+  ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
+}
+
 #ifdef WITH_AUDASPACE
 
 /* ******************** Sound Bake F-Curve Operator *********************** */
diff --git a/source/blender/editors/space_graph/graph_intern.h b/source/blender/editors/space_graph/graph_intern.h
index eaa14fedb93..7add2f7cbb8 100644
--- a/source/blender/editors/space_graph/graph_intern.h
+++ b/source/blender/editors/space_graph/graph_intern.h
@@ -103,6 +103,7 @@ void GRAPH_OT_clean(struct wmOperatorType *ot);
 void GRAPH_OT_decimate(struct wmOperatorType *ot);
 void GRAPH_OT_sample(struct wmOperatorType *ot);
 void GRAPH_OT_bake(struct wmOperatorType *ot);
+void GRAPH_OT_unbake(struct wmOperatorType *ot);
 void GRAPH_OT_sound_bake(struct wmOperatorType *ot);
 void GRAPH_OT_smooth(struct wmOperatorType *ot);
 void GRAPH_OT_euler_filter(struct wmOperatorType *ot);
diff --git a/source/blender/editors/space_graph/graph_ops.c b/source/blender/editors/space_graph/graph_ops.c
index fd68303e759..63acc2a1774 100644
--- a/source/blender/editors/space_graph/graph_ops.c
+++ b/source/blender/editors/space_graph/graph_ops.c
@@ -459,6 +459,7 @@ void graphedit_operatortypes(void)
   WM_operatortype_append(GRAPH_OT_easing_type);
   WM_operatortype_append(GRAPH_OT_sample);
   WM_operatortype_append(GRAPH_OT_bake);
+  WM_operatortype_append(GRAPH_OT_unbake);
   WM_operatortype_append(GRAPH_OT_sound_bake);
   WM_operatortype_append(GRAPH_OT_smooth);
   WM_operatortype_append(GRAPH_OT_clean);