From 91bf7a2e2371a321b3bd402810cfe3b2774e2777 Mon Sep 17 00:00:00 2001
From: Stan Seibert <stan@mtrr.org>
Date: Wed, 3 Aug 2011 13:44:24 -0400
Subject: GEANT4-based photon vertex generator.

Propagates a particle through a huge volume of some material and harvest
the photon vertices that are created for propagation with Chroma.

Relies on a patched version of g4py, plus a local boost.python module that
is built at import time if needed.  (Does not detect changes to rebuild,
however.)

Chroma materials can now have a density set, as well as an elemental
composition (by weight) that is used by this generator.
---
 geometry.py | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'geometry.py')

diff --git a/geometry.py b/geometry.py
index 5fdfa1f..ac71429 100644
--- a/geometry.py
+++ b/geometry.py
@@ -109,6 +109,8 @@ class Material(object):
         self.refractive_index = None
         self.absorption_length = None
         self.scattering_length = None
+        self.density = 0.0 # g/cm^3
+        self.composition = {} # by mass
 
     def set(self, name, value, wavelengths=standard_wavelengths):
         if np.iterable(value):
-- 
cgit