FEM: Add ElectricInfinity- and CapacitanceMatrix- boundary condition for Elmer

src/Mod/Fem/Gui/Resources/ui/ElectrostaticPotential.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>400</width>
-    <height>300</height>
+    <height>154</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -17,15 +17,74 @@
    <property name="fieldGrowthPolicy">
     <enum>QFormLayout::AllNonFixedFieldsGrow</enum>
    </property>
-   <item row="1" column="0">
+   <item row="0" column="0">
     <widget class="QLabel" name="potentialLbl">
      <property name="text">
       <string>Potential:</string>
      </property>
     </widget>
    </item>
-   <item row="1" column="1">
-    <layout class="QHBoxLayout" name="horizontalLayout_2">
+   <item row="2" column="0" colspan="2">
+    <widget class="QCheckBox" name="potentialConstantBox">
+     <property name="text">
+      <string>Potential Constant</string>
+     </property>
+    </widget>
+   </item>
+   <item row="3" column="0" colspan="2">
+    <widget class="QCheckBox" name="electricInfinityBox">
+     <property name="enabled">
+      <bool>true</bool>
+     </property>
+     <property name="text">
+      <string>Farfield / Electric infinity</string>
+     </property>
+    </widget>
+   </item>
+   <item row="4" column="1">
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QCheckBox" name="capacitanceBodyBox">
+       <property name="text">
+        <string>unspecified</string>
+       </property>
+       <property name="checked">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QSpinBox" name="capacitanceBody_spinBox">
+       <property name="enabled">
+        <bool>true</bool>
+       </property>
+       <property name="maximumSize">
+        <size>
+         <width>55</width>
+         <height>16777215</height>
+        </size>
+       </property>
+       <property name="baseSize">
+        <size>
+         <width>1</width>
+         <height>0</height>
+        </size>
+       </property>
+       <property name="minimum">
+        <number>1</number>
+       </property>
+       <property name="value">
+        <number>1</number>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item row="0" column="1">
+    <layout class="QHBoxLayout" name="horizontalLayout_2" stretch="0,0">
+     <property name="spacing">
+      <number>0</number>
+     </property>
      <item>
       <widget class="Gui::InputField" name="potentialTxt">
        <property name="enabled">
@@ -51,10 +110,10 @@
      </item>
     </layout>
    </item>
-   <item row="4" column="0" colspan="2">
-    <widget class="QCheckBox" name="potentialConstantBox">
+   <item row="4" column="0">
+    <widget class="QLabel" name="capacityBody_label">
      <property name="text">
-      <string>Potential Constant</string>
+      <string extracomment="Enabled by 'Calculate Capacity Matrix' in Electrostatic equation">Capacity Body: </string>
      </property>
     </widget>
    </item>

src/Mod/Fem/femguiobjects/_ViewProviderFemConstraintElectrostaticPotential.py

@@ -120,6 +120,14 @@ class _TaskPanel(object):
         self._paramWidget.potentialConstantBox.setChecked(
             self._obj.PotentialConstant)
 
+        self._paramWidget.electricInfinityBox.setChecked(
+            self._obj.ElectricInfinity)
+                                                         
+        self._paramWidget.capacitanceBodyBox.setChecked(
+            not self._obj.CapacitanceBodyEnabled)
+        self._paramWidget.capacitanceBody_spinBox.setValue(
+            self._obj.CapacitanceBody)
+        
     def _applyWidgetChanges(self):
         unit = "V"
         self._obj.PotentialEnabled = \

src/Mod/Fem/femobjects/_FemConstraintElectrostaticPotential.py

@@ -44,4 +44,15 @@ class Proxy(FemConstraint.Proxy):
             "Parameter", "Potential Enabled"),
         obj.addProperty(
             "App::PropertyBool", "PotentialConstant",
-            "Parameter", "Potential Constant")
+            "Parameter", "Potential Constant"),
+        obj.addProperty(      # Howil added
+            "App::PropertyBool", "ElectricInfinity",
+            "Parameter", "Electric Infinity")
+        obj.addProperty(
+            "App::PropertyInteger", "CapacitanceBody",
+            "Parameter", "Capacitance Body")
+        obj.addProperty(
+            "App::PropertyBool", "CapacitanceBodyEnabled",
+            "Parameter", "Capacitance Body Enabled")
+        
+

src/Mod/Fem/femsolver/elmer/equations/electrostatic.py

@@ -54,10 +54,10 @@ class Proxy(linear.Proxy, equationbase.ElectrostaticProxy):
         obj.addProperty(
             "App::PropertyBool", "CalculateSurfaceCharge",
             "Electrostatic", "Select type of solver for linear system")
+        obj.addProperty(
+            "App::PropertyBool", "CalculateCapacitanceMatrix",
+            "Electrostatic", "Select type of solver for linear system")
         """
-        #obj.addProperty(
-            #"App::PropertyBool", "CalculateCapacitanceMatrix",
-            #"Electrostatic", "Select type of solver for linear system")
         #obj.addProperty(
             #"App::PropertyInteger", "CapacitanceBodies",
             #"Electrostatic", "Select type of solver for linear system")

src/Mod/Fem/femsolver/elmer/writer.py

@@ -362,6 +362,11 @@ class Writer(object):
                             self._boundary(name, "Potential", potential)
                     if obj.PotentialConstant:
                         self._boundary(name, "Potential Constant", True)
+                    if obj.ElectricInfinity:
+                        self._boundary(name, "Electric Infinity BC", True)
+                    if obj.CapacitanceBodyEnabled:
+                        if hasattr(obj, 'CapacitanceBody'):
+                            self._boundary(name, "Capacitance Body", obj.CapacitanceBody)        
                 self._handled(obj)
 
     def _handleFluxsolver(self):