GP: Add new frame scale parameter to Time modifier

This new parameter allows to increase or decrease the animation speed to break animation patterns when reuse data blocks.

1 files changed, 7 insertions, 0 deletions

diff --git a/source/blender/gpencil_modifiers/intern/MOD_gpenciltime.c b/source/blender/gpencil_modifiers/intern/MOD_gpenciltime.c
index 521a398ee29..c72a20cc0e9 100644
--- a/source/blender/gpencil_modifiers/intern/MOD_gpenciltime.c
+++ b/source/blender/gpencil_modifiers/intern/MOD_gpenciltime.c
@@ -55,6 +55,7 @@ static void initData(GpencilModifierData *md)
 	TimeGpencilModifierData *gpmd = (TimeGpencilModifierData *)md;
 	gpmd->layername[0] = '\0';
 	gpmd->offset = 1;
+	gpmd->frame_scale = 1.0f;
 	gpmd->flag |= GP_TIME_KEEP_LOOP;
 }
 
@@ -88,6 +89,12 @@ static int remapTime(
 		}
 	}
 
+	/* apply frame scale */
+	cfra *= mmd->frame_scale;
+	if (cfra > efra) {
+		cfra = sfra + (cfra - ((cfra / efra) * efra));
+	}
+
 	if (mmd->flag & GP_TIME_KEEP_LOOP) {
 		/* if the sum of the cfra is out scene frame range, recalc */
 		if (cfra + mmd->offset < sfra) {