tonly add fluid force vectors if fluid=true - 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 21f1894e7c4390b1b3c1856bd7510ecda586c1e3
 (DIR) parent 0f1185f84c194087b38e96293082d0f4f73d5afa
 (HTM) Author: Anders Damsgaard <anders.damsgaard@geo.au.dk>
       Date:   Mon,  1 Sep 2014 10:47:59 +0200
       
       only add fluid force vectors if fluid=true
       
       Diffstat:
         M python/sphere.py                    |       9 +++++----
       
       1 file changed, 5 insertions(+), 4 deletions(-)
       ---
 (DIR) diff --git a/python/sphere.py b/python/sphere.py
       t@@ -691,10 +691,11 @@ class sim:
                self.ev     = numpy.append(self.ev, ev)
                self.p      = numpy.append(self.p, p) 
                self.color  = numpy.append(self.color, color)
       -        self.f_d    = numpy.append(self.f_d, [numpy.zeros(3)], axis=0)
       -        self.f_p    = numpy.append(self.f_p, [numpy.zeros(3)], axis=0)
       -        self.f_v    = numpy.append(self.f_v, [numpy.zeros(3)], axis=0)
       -        self.f_sum  = numpy.append(self.f_sum, [numpy.zeros(3)], axis=0)
       +        if self.fluid:
       +            self.f_d    = numpy.append(self.f_d, [numpy.zeros(3)], axis=0)
       +            self.f_p    = numpy.append(self.f_p, [numpy.zeros(3)], axis=0)
       +            self.f_v    = numpy.append(self.f_v, [numpy.zeros(3)], axis=0)
       +            self.f_sum  = numpy.append(self.f_sum, [numpy.zeros(3)], axis=0)
        
            def deleteParticle(self, i):
                '''