GP: Force Fill triangulation data recalc

Add a general parameter to force the recalc of the triangulation data because some modifiers could change the geometry and the filling triangles would not be right.

Now, the parameter is visible in UI panel because this option reduces FPS, but maybe in the future we can keep always ON and remove the parameter.

1 files changed, 13 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/gpencil_modifier.c b/source/blender/blenkernel/intern/gpencil_modifier.c
index d1c455f64e1..512f6f73927 100644
--- a/source/blender/blenkernel/intern/gpencil_modifier.c
+++ b/source/blender/blenkernel/intern/gpencil_modifier.c
@@ -403,6 +403,19 @@ void BKE_gpencil_stroke_modifiers(Depsgraph *depsgraph, Object *ob, bGPDlayer *g
 
 			if (mti && mti->deformStroke) {
 				mti->deformStroke(md, depsgraph, ob, gpl, gps);
+
+				/* some modifiers could require a recalc of fill triangulation data */
+				if (gpd->flag & GP_DATA_STROKE_FORCE_RECALC) {
+					if (ELEM(md->type,
+							eGpencilModifierType_Hook,
+							eGpencilModifierType_Lattice,
+							eGpencilModifierType_Noise,
+							eGpencilModifierType_Offset,
+							eGpencilModifierType_Smooth)) {
+
+						gps->flag |= GP_STROKE_RECALC_CACHES;
+					}
+				}
 			}
 		}
 	}