make baseline and density settable for DPpropagator (#155)

* make baseline and density settable for DPpropagator

* also add python bindings

Author: ewanwm

nuTens/propagator/DP-propagator.hpp

@@ -24,6 +24,18 @@ class DPpropagator : public Propagator
 
     /// @{Setters
 
+    inline void setBaseline(float newBaseline) override
+    {
+        NT_PROFILE();
+
+        _baseline = newBaseline;
+    }
+    inline void setDensity(float newDensity)
+    {
+        NT_PROFILE();
+
+        _density = newDensity;
+    }
     inline void setTheta12(Tensor &newTheta12)
     {
         NT_PROFILE();

python/binding.cpp

@@ -311,6 +311,14 @@ void initPropagator(py::module &m)
             "set the parameters for the oscillation calculations",
             py::arg("new_theta12"), py::arg("new_theta23"), py::arg("new_theta13"), py::arg("new_deltaCP"), py::arg("new_deltamsq21"), py::arg("new_deltamsq31")
         )
+        .def("set_baseline", &DPpropagator::setBaseline,
+            "set the baseline",
+            py::arg("new_baseline")
+        )
+        .def("set_density", &DPpropagator::setDensity,
+            "set the density",
+            py::arg("new_density")
+        )
         .def("set_energies", &DPpropagator::setEnergies,
             "set the neutrino energies",
             py::arg("new_energies")