D1886: GPencil - Add smooth iterations parameter to get better quality

After some test, a new iteration parameter has been added in order to
apply repetitive smoothing to the stroke. By default 1 iteration is applied,
but can used any number between 1 and 3.

The repetition uses different levels of intensity from 100% of the defined smooth
factor for the first loop, 50% for the second and 25% for the third. We use in each
loop a smaller value in order to avoid deform too much the stroke.

1 files changed, 7 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_gpencil.c b/source/blender/makesrna/intern/rna_gpencil.c
index 10d7efe9374..0aebca8f56b 100644
--- a/source/blender/makesrna/intern/rna_gpencil.c
+++ b/source/blender/makesrna/intern/rna_gpencil.c
@@ -810,6 +810,13 @@ static void rna_def_gpencil_layer(BlenderRNA *brna)
 	RNA_def_property_ui_text(prop, "Smooth", "Amount of smoothing to apply to newly created strokes, to reduce jitter/noise");
 	RNA_def_property_update(prop, NC_GPENCIL | ND_DATA, "rna_GPencil_update");
 	
+	/* Iterations of the Smoothing factor */
+	prop = RNA_def_property(srna, "pen_smooth_steps", PROP_INT, PROP_NONE);
+	RNA_def_property_int_sdna(prop, NULL, "draw_smoothlvl");
+	RNA_def_property_range(prop, 1, 3);
+	RNA_def_property_ui_text(prop, "Iterations", "Number of times to smooth newly created strokes [+ reason/effect of using higher values of this property]");
+	RNA_def_property_update(prop, NC_GPENCIL | ND_DATA, "rna_GPencil_update");
+
 	/* Subdivision level for new strokes */
 	prop = RNA_def_property(srna, "pen_subdivision_steps", PROP_INT, PROP_NONE);
 	RNA_def_property_int_sdna(prop, NULL, "sublevel");