tAdded void ratio function - sphere - GPU-based 3D discrete element method algorithm with optional fluid coupling
 (HTM) git clone git://src.adamsgaard.dk/sphere
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       ---
 (DIR) commit fd4911c71e33e2676faec3512d6fea2fba47a120
 (DIR) parent 4c584cfa1126b464c9df23690533d7e8758ee55d
 (HTM) Author: Anders Damsgaard <adc@geo.au.dk>
       Date:   Wed, 29 Aug 2012 13:56:47 +0200
       
       Added void ratio function
       
       Diffstat:
         M python/sphere.py                    |      15 +++++++++++++++
       
       1 file changed, 15 insertions(+), 0 deletions(-)
       ---
 (DIR) diff --git a/python/sphere.py b/python/sphere.py
       t@@ -730,6 +730,21 @@ class Spherebin:
            elif method == 'shearrate':
              return numpy.sum(self.es_dot)
        
       +  def voidRatio(self):
       +    """ Return the current void ratio
       +    """
       +
       +    # Find the bulk volume
       +    V_t = (self.L[0] - self.origo[0])
       +             *(self.L[1] - self.origo[1])
       +         *(self.w_x[0] - self.origo[2])
       +
       +    # Find the volume of solids
       +    V_s = numpy.sum(4.0/3.0 * math.pi * self.radius**3)
       +
       +    # Return the void ratio
       +    e = (V_t - V_s)/V_s
       +    return e
        
        def render(binary,
                   out = '~/img_out/rt-out',