Merge branch 'master' into gpencil-new-data-proposalgpencil-new-data-proposal

1 files changed, 26 insertions, 1 deletions

diff --git a/source/blender/modifiers/intern/MOD_ui_common.c b/source/blender/modifiers/intern/MOD_ui_common.c
index c027cae8cdb..e882435077a 100644
--- a/source/blender/modifiers/intern/MOD_ui_common.c
+++ b/source/blender/modifiers/intern/MOD_ui_common.c
@@ -326,8 +326,33 @@ static void modifier_panel_header(const bContext *C, Panel *panel)
     }
   } /* Tessellation point for curve-typed objects. */
   else if (ELEM(ob->type, OB_CURVES_LEGACY, OB_SURF, OB_FONT)) {
+    /* Smooth modifier can work with tessellated curves only (works on mesh edges explicitly). */
+    if (md->type == eModifierType_Smooth) {
+      /* Add button (appearing to be OFF) and add tip why this can't be changed. */
+      sub = uiLayoutRow(row, true);
+      uiBlock *block = uiLayoutGetBlock(sub);
+      static int apply_on_spline_always_off_hack = 0;
+      uiBut *but = uiDefIconButBitI(block,
+                                    UI_BTYPE_TOGGLE,
+                                    eModifierMode_ApplyOnSpline,
+                                    0,
+                                    ICON_SURFACE_DATA,
+                                    0,
+                                    0,
+                                    UI_UNIT_X - 2,
+                                    UI_UNIT_Y,
+                                    &apply_on_spline_always_off_hack,
+                                    0.0,
+                                    0.0,
+                                    0.0,
+                                    0.0,
+                                    TIP_("Apply on Spline"));
+      UI_but_disable(
+          but, TIP_("This modifier can only deform filled curve/surface, not the control points"));
+      buttons_number++;
+    }
     /* Some modifiers can work with pre-tessellated curves only. */
-    if (ELEM(md->type, eModifierType_Hook, eModifierType_Softbody, eModifierType_MeshDeform)) {
+    else if (ELEM(md->type, eModifierType_Hook, eModifierType_Softbody, eModifierType_MeshDeform)) {
       /* Add button (appearing to be ON) and add tip why this can't be changed. */
       sub = uiLayoutRow(row, true);
       uiBlock *block = uiLayoutGetBlock(sub);