document compute_shadow_function

docs/source/astro.rst

@@ -25,6 +25,7 @@ The other modules make extensive use of the functionality exposed here.
    two_body_dynamics
    polyhedron_utilities
    gravitation
+   fundamentals
 
 
 

docs/source/fundamentals.rst

@@ -0,0 +1,27 @@
+``fundamentals``
+===============
+Functions for fundamental astrodynamic calculations
+
+
+This module contains a list of functions for fundamental astrodynamic calculations.
+These functions are used in the other modules to perform more complex calculations,
+but can also be used on their own for standalone calculations.
+
+.. note:: The functions in this module are expected to be reorganized in the future.
+
+
+
+Functions
+---------
+.. currentmodule:: tudatpy.astro.fundamentals
+
+.. autosummary::
+
+   compute_shadow_function
+
+
+
+.. autofunction:: tudatpy.astro.fundamentals.compute_shadow_function
+
+
+

tudatpy/kernel/docstrings.h

@@ -2721,6 +2721,51 @@ tuple[numpy.ndarray, numpy.ndarray]
 
 
 
+namespace fundamentals{
+
+static inline std::string get_docstring(std::string name) {
+
+    if (name == "test") {
+        return "test";
+
+
+    } else if(name == "compute_shadow_function" ) {
+        return R"(
+
+Compute the shadow function.
+
+Returns the value of of the shadow function. Returns 0 if the satellite is in umbra, 1 if the
+satellite is fully exposed and a value between 0 and 1 if the satellite is in penumbra or antumbra.
+
+The point of view is from the satellite. The occulting body (for example the Earth) is the body
+that blocks the light from the occulted body (for example the Sun).
+
+Reference: Section 3.4 from ( Montebruck O, Gill E., 2005) and Fig. 5 from (Zhang et al., 2019).
+
+Parameters
+----------
+occulted_body_position : numpy.ndarray
+    Vector containing Cartesian coordinates of the occulted body.
+occulted_body_radius : float
+    Mean radius of occulted body.
+occulting_body_position : numpy.ndarray
+    Vector containing Cartesian coordinates of the occulting body.
+occulting_body_radius : float
+    Mean radius of occulting body.
+satellite_position : numpy.ndarray
+    Vector containing Cartesian coordinates of the satellite.
+Returns
+-------
+float
+    Shadow function value
+
+    )";
+
+    } else {
+        return "No documentation found.";
+    }
+
+}
 
 }
 

tudatpy/kernel/expose_astro/expose_fundamentals.cpp

@@ -30,7 +30,8 @@ namespace fundamentals {
               py::arg("occulted_body_radius"),
               py::arg("occulting_body_position"),
               py::arg("occulting_body_radius"),
-              py::arg("satellite_position"));
+              py::arg("satellite_position"),
+              get_docstring("compute_shadow_function").c_str());
 
     }