* Added Navier Stokes computational fluid dynamics algorithms to libTerrain.Channel.

1 files changed, 32 insertions, 1 deletions

diff --git a/OpenSim/Region/Terrain.BasicTerrain/libTerrainBSD/Channel/Manipulators/NavierStokes.cs b/OpenSim/Region/Terrain.BasicTerrain/libTerrainBSD/Channel/Manipulators/NavierStokes.cs
index df42487..f01b2860 100644
--- a/OpenSim/Region/Terrain.BasicTerrain/libTerrainBSD/Channel/Manipulators/NavierStokes.cs
+++ b/OpenSim/Region/Terrain.BasicTerrain/libTerrainBSD/Channel/Manipulators/NavierStokes.cs
@@ -220,9 +220,40 @@ namespace libTerrain
             }

         }

 

-        private void nsSimulate(int N, int rounds, double dt, double diff, double visc, double force, double source)

+        private void nsSimulate(int N, int rounds, double dt, double diff, double visc)

         {

+            int size = (N * 2) * (N * 2);

 

+            double[] u          = new double[size]; // Force, X axis

+            double[] v          = new double[size]; // Force, Y axis

+            double[] u_prev     = new double[size];

+            double[] v_prev     = new double[size];

+            double[] dens       = (double[])map.Clone();

+            double[] dens_prev  = (double[])map.Clone();

+

+            for (int i = 0; i < rounds; i++)

+            {

+                u_prev = u;

+                v_prev = v;

+                dens_prev = dens;

+

+                nsVelStep(N, ref u, ref v, ref u_prev, ref v_prev, visc, dt);

+                nsDensStep(N, ref dens, ref dens_prev, ref u, ref v, diff, dt);

+            }

+

+            nsBufferToDoubles(ref dens, N, ref this.map);

+        }

+

+        /// <summary>

+        /// Performs computational fluid dynamics on a channel

+        /// </summary>

+        /// <param name="rounds">The number of steps to perform (Recommended: 20)</param>

+        /// <param name="dt">Delta Time - The time between steps</param>

+        /// <param name="diff">Fluid diffusion rate</param>

+        /// <param name="visc">Fluid viscosity</param>

+        public void navierStokes(int rounds, double dt, double diff, double visc)

+        {

+            nsSimulate(this.h, rounds, dt, diff, visc);

         }

     }

 }
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