Fix T64681: evaluate curves with generative modifiers and no keys.

Introduce a new function and use it everywhere, including
automatic curve deletion checks to guarantee consistency.

1 files changed, 4 insertions, 4 deletions

diff --git a/source/blender/blenkernel/intern/anim_sys.c b/source/blender/blenkernel/intern/anim_sys.c
index 663eb4027f6..ab7e59a059b 100644
--- a/source/blender/blenkernel/intern/anim_sys.c
+++ b/source/blender/blenkernel/intern/anim_sys.c
@@ -1894,7 +1894,7 @@ static void animsys_evaluate_fcurves(Depsgraph *depsgraph,
       continue;
     }
     /* Skip empty curves, as if muted. */
-    if (fcu->totvert == 0) {
+    if (BKE_fcurve_is_empty(fcu)) {
       continue;
     }
     PathResolvedRNA anim_rna;
@@ -2009,7 +2009,7 @@ void animsys_evaluate_action_group(PointerRNA *ptr, bAction *act, bActionGroup *
   /* calculate then execute each curve */
   for (fcu = agrp->channels.first; (fcu) && (fcu->grp == agrp); fcu = fcu->next) {
     /* check if this curve should be skipped */
-    if ((fcu->flag & (FCURVE_MUTED | FCURVE_DISABLED)) == 0 && fcu->totvert != 0) {
+    if ((fcu->flag & (FCURVE_MUTED | FCURVE_DISABLED)) == 0 && !BKE_fcurve_is_empty(fcu)) {
       PathResolvedRNA anim_rna;
       if (animsys_store_rna_setting(ptr, fcu->rna_path, fcu->array_index, &anim_rna)) {
         const float curval = calculate_fcurve(&anim_rna, fcu, ctime);
@@ -3105,7 +3105,7 @@ static void nlastrip_evaluate_actionclip(PointerRNA *ptr,
     if ((fcu->grp) && (fcu->grp->flag & AGRP_MUTED)) {
       continue;
     }
-    if (fcu->totvert == 0) {
+    if (BKE_fcurve_is_empty(fcu)) {
       continue;
     }
 
@@ -3334,7 +3334,7 @@ static void nla_eval_domain_action(PointerRNA *ptr,
     if ((fcu->grp) && (fcu->grp->flag & AGRP_MUTED)) {
       continue;
     }
-    if (fcu->totvert == 0) {
+    if (BKE_fcurve_is_empty(fcu)) {
       continue;
     }