tdo not open png files, add perturbation - slidergrid - grid of elastic sliders on a frictional surface
 (HTM) git clone git://src.adamsgaard.dk/slidergrid
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       ---
 (DIR) commit 5420c99b87bf0d3a043aaf7d8ad2ba6dc972bfda
 (DIR) parent 2148944e1fe65b0eec1d0179e0ec41eb21f54eca
 (HTM) Author: Anders Damsgaard <anders.damsgaard@geo.au.dk>
       Date:   Thu, 17 Mar 2016 11:25:26 -0700
       
       do not open png files, add perturbation
       
       Diffstat:
         M plot_output.py                      |       2 +-
         M test.c                              |       4 +++-
       
       2 files changed, 4 insertions(+), 2 deletions(-)
       ---
 (DIR) diff --git a/plot_output.py b/plot_output.py
       t@@ -39,7 +39,7 @@ class sgvis:
        
            def plot_all_sliders(self):
                for filename in os.listdir(self.folder):
       -            if 'sliders' in filename:
       +            if 'sliders' in filename and '.png' not in filename:
                        self.read_sliders(filename)
                        self.plot_sliders()
        
 (DIR) diff --git a/test.c b/test.c
       t@@ -11,7 +11,7 @@ simulation setup_simulation()
        
            // initialize grid of sliders
            int nx = 4;
       -    int ny = 4;
       +    int ny = 1;
            int nz = 1;
            sim.N = nx*ny*nz;
            sim.sliders = create_regular_slider_grid(nx, ny, nz, 1.0, 1.0, 1.0);
       t@@ -26,6 +26,8 @@ simulation setup_simulation()
                sim.sliders[i].bond_parallel_stiffness = 1.0e5;
            }
        
       +    sim.sliders[i].vel.x = 1.0;
       +
            // set temporal parameters
            sim.time = 0.0;
            sim.time_end = 1.0;