From 9e1edcecbda56db0c0b8f1b353a72981d47448b9 Mon Sep 17 00:00:00 2001
From: Maximilian Reininghaus <maximilian.reininghaus@tu-dortmund.de>
Date: Mon, 11 Mar 2019 23:57:23 -0300
Subject: [PATCH] documentation for FlatExponential

---
 Environment/FlatExponential.h | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/Environment/FlatExponential.h b/Environment/FlatExponential.h
index 7f294bebd..ef8cdc9a3 100644
--- a/Environment/FlatExponential.h
+++ b/Environment/FlatExponential.h
@@ -20,7 +20,18 @@
 #include <corsika/units/PhysicalUnits.h>
 
 namespace corsika::environment {
-
+  
+  //clang-format off
+  /**
+   * flat exponential density distribution with
+   * \f[
+   *  \varrho(r) = \varrho_0 \exp\left( \frac{1}{\lambda} (r - p) \cdot
+   *    \vec{a} \right).
+   * \f]
+   * \f$ \vec{a} \f$ denotes the axis and should be normalized to avoid degeneracy
+   * with the scale parameter \f$ \lambda \f$.
+   */
+  //clang-format on
   template <class T>
   class FlatExponential : public BaseExponential<FlatExponential<T>>, public T {
     geometry::Vector<units::si::dimensionless_d> const fAxis;
-- 
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