From 7fff27f036a5a808b9015ff448fb7f1468f4caa7 Mon Sep 17 00:00:00 2001
From: "Zheng, Lei" <realthunder.dev@gmail.com>
Date: Sun, 10 Oct 2021 22:01:25 +0800
Subject: [PATCH] Part: sync ViewProviderExt::DiffuseColor on Transparency
 change

---
 src/Mod/Part/Gui/ViewProviderExt.cpp | 17 +++++------------
 1 file changed, 5 insertions(+), 12 deletions(-)

diff --git a/src/Mod/Part/Gui/ViewProviderExt.cpp b/src/Mod/Part/Gui/ViewProviderExt.cpp
index c43bb64fad..47257f6958 100644
--- a/src/Mod/Part/Gui/ViewProviderExt.cpp
+++ b/src/Mod/Part/Gui/ViewProviderExt.cpp
@@ -452,17 +452,10 @@ void ViewProviderPartExt::onChanged(const App::Property* prop)
         long value = (long)(100*Mat.transparency);
         if (value != Transparency.getValue()) {
             float trans = Transparency.getValue()/100.0f;
-            if (pcFaceBind->value.getValue() == SoMaterialBinding::PER_PART) {
-                int cnt = pcShapeMaterial->diffuseColor.getNum();
-                pcShapeMaterial->transparency.setNum(cnt);
-                float *t = pcShapeMaterial->transparency.startEditing();
-                for (int i=0; i<cnt; i++)
-                    t[i] = trans;
-                pcShapeMaterial->transparency.finishEditing();
-            }
-            else {
-                pcShapeMaterial->transparency = trans;
-            }
+            auto colors = DiffuseColor.getValues();
+            for (auto &c : colors)
+                c.a = Transparency.getValue()/100.0f;
+            DiffuseColor.setValues(colors);
 
             App::PropertyContainer* parent = ShapeMaterial.getContainer();
             ShapeMaterial.setContainer(0);
@@ -731,7 +724,7 @@ void ViewProviderPartExt::setHighlightedFaces(const std::vector<App::Color>& col
     else if (colors.size() == 1) {
         pcFaceBind->value = SoMaterialBinding::OVERALL;
         pcShapeMaterial->diffuseColor.setValue(colors[0].r, colors[0].g, colors[0].b);
-        //pcShapeMaterial->transparency = colors[0].a; do not get transparency from DiffuseColor in this case
+        pcShapeMaterial->transparency = Transparency.getValue()/100.f;
     }
 }