tchange sign on every 2nd value - 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 4ac1331a468e9543d1b7ec944b75aebe8d229065
 (DIR) parent ddf90fec75f449401838ada68084b5d2c4aea6a5
 (HTM) Author: Anders Damsgaard <anders.damsgaard@geo.au.dk>
       Date:   Fri, 20 Mar 2015 11:40:42 +0100
       
       change sign on every 2nd value
       
       Diffstat:
         M src/darcy.cuh                       |       6 +++---
       
       1 file changed, 3 insertions(+), 3 deletions(-)
       ---
 (DIR) diff --git a/src/darcy.cuh b/src/darcy.cuh
       t@@ -449,7 +449,7 @@ __global__ void findDarcyPorositiesLinear(
                                            s = weight(x3,
                                                    X + MAKE_FLOAT3( 0.5*dx, 0.0, 0.0),
                                                    dx, dy, dz);
       -                                    v_p_xp += s*vol_p*v3.x/(s*vol_p + 1.0e-16);
       +                                    v_p_xp += s*vol_p*v3.x/(s*vol_p - 1.0e-16);
        
                                            s = weight(x3,
                                                    X + MAKE_FLOAT3( 0.0, -0.5*dy, 0.0),
       t@@ -459,7 +459,7 @@ __global__ void findDarcyPorositiesLinear(
                                            s = weight(x3,
                                                    X + MAKE_FLOAT3( 0.0, 0.5*dy, 0.0),
                                                    dx, dy, dz);
       -                                    v_p_yp += s*vol_p*v3.y/(s*vol_p + 1.0e-16);
       +                                    v_p_yp += s*vol_p*v3.y/(s*vol_p - 1.0e-16);
        
                                            s = weight(x3,
                                                    X + MAKE_FLOAT3( 0.0, 0.0, -0.5*dz),
       t@@ -469,7 +469,7 @@ __global__ void findDarcyPorositiesLinear(
                                            s = weight(x3,
                                                    X + MAKE_FLOAT3( 0.0, 0.0, 0.5*dz),
                                                    dx, dy, dz);
       -                                    v_p_zp += s*vol_p*v3.z/(s*vol_p + 1.0e-16);
       +                                    v_p_zp += s*vol_p*v3.z/(s*vol_p - 1.0e-16);
                                        }
                                    }
                                }