NoiseArea.cs

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using OpenSim.Framework;
using OpenSim.Region.Framework.Interfaces;
using OpenSim.Region.Framework.Scenes;

namespace OpenSim.Region.CoreModules.World.Terrain.FloodBrushes
{
    public class NoiseArea : ITerrainFloodEffect
    {
        #region ITerrainFloodEffect Members

        public void FloodEffect(ITerrainChannel map, bool[,] fillArea, double strength,
            int startX, int endX, int startY, int endY)
        {
            int x, y;
            for (x = startX; x <= endX; x++)
            {
                for (y = startY; y <= endY; y++)
                {
                    if (fillArea[x, y])
                    {
                        double noise = TerrainUtil.PerlinNoise2D((double) x / map.Width, (double) y / map.Height, 8, 1.0);
                        map[x, y] += noise * strength;
                    }
                }
            }
        }

        #endregion
    }
}