tadd more DOF - slidergrid - grid of elastic sliders on a frictional surface
 (HTM) git clone git://src.adamsgaard.dk/slidergrid
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       ---
 (DIR) commit cc654a7b73a8bdb1f7771af8e6aa946262d7e0bd
 (DIR) parent d7ec81af4ae23fc6bc3614beb3f2f80dab6320af
 (HTM) Author: Anders Damsgaard <anders.damsgaard@geo.au.dk>
       Date:   Tue, 15 Mar 2016 12:58:32 -0700
       
       add more DOF
       
       Diffstat:
         M main.c                              |       1 -
         M slider.h                            |       3 +++
       
       2 files changed, 3 insertions(+), 1 deletion(-)
       ---
 (DIR) diff --git a/main.c b/main.c
       t@@ -12,7 +12,6 @@ int main(int argc, char** argv)
            slider* sliders = create_regular_slider_grid(nx, ny, nz, 1.0, 1.0, 1.0);
        
        
       -    print_slider_position(0);
        
            free(sliders);
            return EXIT_SUCCESS;
 (DIR) diff --git a/slider.h b/slider.h
       t@@ -5,6 +5,9 @@
        
        typedef struct {
            v3 pos;  // spatial position
       +    v3 vel;  // spatial velocity
       +    v3 acc;  // spatial acceleration
       +    v3 force;  // sum of forces
            Float bulk_modulus;  // elastic compressibility
            int neighbors[];  // indexes of sliders this one is bonded to
        } slider;