FEM: Add support for amplitudes with CalculiX (#22851)

src/Mod/Fem/App/FemConstraintForce.cpp

@@ -54,6 +54,16 @@ ConstraintForce::ConstraintForce()
 
     // by default use the null vector to indicate an invalid value
     naturalDirectionVector = Base::Vector3d(0, 0, 0);
+    ADD_PROPERTY_TYPE(EnableAmplitude,
+                      (false),
+                      "ConstraintForce",
+                      (App::PropertyType)(App::Prop_None),
+                      "Amplitude of the force load");
+    ADD_PROPERTY_TYPE(AmplitudeValues,
+                      (std::vector<std::string> {"0, 0", "1, 1"}),
+                      "ConstraintForce",
+                      (App::PropertyType)(App::Prop_None),
+                      "Amplitude values");
 }
 
 App::DocumentObjectExecReturn* ConstraintForce::execute()