Fem/Mesh: force update of shape nodes when changing the transparencies of a color plot

src/Mod/Fem/Gui/ViewProviderFemPostObject.cpp

@@ -543,7 +543,10 @@ void ViewProviderFemPostObject::WriteColorData(bool ResetColorBarRange) {
     m_material->diffuseColor.finishEditing();
     m_material->transparency.finishEditing();
     m_materialBinding->value = SoMaterialBinding::PER_VERTEX_INDEXED;
-    m_materialBinding->touch();
+
+    // In order to apply the transparency changes the shape nodes must be touched
+    m_faces->touch();
+    m_triangleStrips->touch();
 }
 
 void ViewProviderFemPostObject::WriteTransparency() {

src/Mod/Mesh/Gui/ViewProviderCurvature.cpp

@@ -25,6 +25,7 @@
 
 #ifndef _PreComp_
 # include <Inventor/SoPickedPoint.h>
+# include <Inventor/actions/SoSearchAction.h>
 # include <Inventor/details/SoFaceDetail.h>
 # include <Inventor/details/SoPointDetail.h>
 # include <Inventor/events/SoMouseButtonEvent.h>
@@ -357,6 +358,21 @@ void ViewProviderMeshCurvature::setVertexCurvatureMode(int mode)
 
     pcColorMat->diffuseColor.finishEditing();
     pcColorMat->transparency.finishEditing();
+
+    // In order to apply the transparency changes the IndexFaceSet node must be touched
+    touchShapeNode();
+}
+
+void ViewProviderMeshCurvature::touchShapeNode()
+{
+    SoSearchAction searchAction;
+    searchAction.setType(SoIndexedFaceSet::getClassTypeId());
+    searchAction.setInterest(SoSearchAction::FIRST);
+    searchAction.apply(pcLinkRoot);
+    SoPath* selectionPath = searchAction.getPath();
+    if (selectionPath) {
+        selectionPath->getTail()->touch();
+    }
 }
 
 QIcon ViewProviderMeshCurvature::getIcon() const

src/Mod/Mesh/Gui/ViewProviderCurvature.h

@@ -97,6 +97,7 @@ protected:
     void onChanged(const App::Property* prop);
     void setVertexCurvatureMode(int mode);
     std::string curvatureInfo(bool detail, int index1, int index2, int index3) const;
+    void touchShapeNode();
 
 private:
     void init(const Mesh::PropertyCurvatureList *prop);