From d0cc9b522dfb56e329f894d2c188bdcdfd175609 Mon Sep 17 00:00:00 2001
From: Cody Winchester <CodyWinch>
Date: Tue, 18 Feb 2020 16:28:02 +0100
Subject: Modifiers: Laplacian Smooth modifier add invert vgroup option

Adds the invert vgroup option to the Laplacian Smooth modifier.

Differential Revision: https://developer.blender.org/D6842
---
 source/blender/modifiers/intern/MOD_laplaciansmooth.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'source/blender/modifiers/intern/MOD_laplaciansmooth.c')

diff --git a/source/blender/modifiers/intern/MOD_laplaciansmooth.c b/source/blender/modifiers/intern/MOD_laplaciansmooth.c
index dbe776ed32a..ea788d3f72b 100644
--- a/source/blender/modifiers/intern/MOD_laplaciansmooth.c
+++ b/source/blender/modifiers/intern/MOD_laplaciansmooth.c
@@ -378,6 +378,7 @@ static void laplaciansmoothModifier_do(
   float w, wpaint;
   int i, iter;
   int defgrp_index;
+  const bool invert_vgroup = (smd->flag & MOD_LAPLACIANSMOOTH_INVERT_VGROUP) != 0;
 
   sys = init_laplacian_system(mesh->totedge, mesh->totpoly, mesh->totloop, numVerts);
   if (!sys) {
@@ -420,7 +421,8 @@ static void laplaciansmoothModifier_do(
       EIG_linear_solver_right_hand_side_add(sys->context, 2, i, vertexCos[i][2]);
       if (iter == 0) {
         if (dv) {
-          wpaint = defvert_find_weight(dv, defgrp_index);
+          wpaint = invert_vgroup ? 1.0f - defvert_find_weight(dv, defgrp_index) :
+                                   defvert_find_weight(dv, defgrp_index);
           dv++;
         }
         else {
-- 
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