To deal with mutable materials such as a gas mixture, the GeoLogVol now has a...

To deal with mutable materials such as a gas mixture, the GeoLogVol now has a method to update the material

GeoModelCore/GeoModelKernel/GeoModelKernel/GeoLogVol.h

@@ -38,6 +38,11 @@ class GeoLogVol : public RCBase
      return m_material;
   }
   
+  //    In some cases (gases, liquids) materials be updated?
+  void setMaterial (const GeoMaterial *newMaterial) {
+    m_material=newMaterial;
+  }
+  
  protected:
   virtual ~GeoLogVol() = default;
   

GeoModelExamples/KitchenSinkPlugin/src/KitchenSinkPlugin.cxx

@@ -294,13 +294,14 @@ void KitchenSinkPlugin::create(GeoVPhysVol *world, bool /*publish*/) {
     double height=platformHeight/2.0+barThickness/2.0+flangeThickness/2.0+barThickness;
     double xHalfLength=leftRightLegSeparation/2.0-barWidth1/2.0-cutoutWidth/2.0-barWidth2/2.0 ;
     const GeoBox       *wBox  = new GeoBox(xHalfLength, cutoutDepth/2.0    ,barThickness/2.0);
-    const GeoLogVol    *wLog  = new GeoLogVol("WLog", wBox, Aluminium);
+    GeoLogVol    *wLog  = new GeoLogVol("WLog", wBox, Aluminium);
     GeoPhysVol         *wPhys = new GeoPhysVol(wLog);
     GeoTransform       *wTransform = new GeoTransform(
 							 GeoTrf::Translate3D(-(61.0+11.0/16.0+4.0)/2.0+xHalfLength+4,0,height)
 							 );
     world->add(wTransform);
     world->add(wPhys);
+    wLog->setMaterial(Stainless);
   }
   
   //--------------------------------------//