RevertSphere.cs

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

namespace OpenSim.Region.CoreModules.World.Terrain.PaintBrushes
{
    public class RevertSphere : ITerrainPaintableEffect
    {
        private readonly ITerrainChannel m_revertmap;

        public RevertSphere(ITerrainChannel revertmap)
        {
            m_revertmap = revertmap;
        }

        #region ITerrainPaintableEffect Members

        public void PaintEffect(ITerrainChannel map, bool[,] mask, double rx, double ry, double rz,
            double strength, double duration, int startX, int endX, int startY, int endY)
        {
            strength = TerrainUtil.MetersToSphericalStrength(strength);
            duration = 0.03; //MCP Should be read from ini file
 
            if (duration > 1.0)
                duration = 1.0;
            if (duration < 0)
                return;

            int x,y;
            for (x = startX; x <= endX; x++)
            {
                for (y = startY; y <= endY; y++)
                {
                    if (!mask[x, y])
                        continue;

                    // Calculate a sphere and add it to the heighmap
                    double z = strength;
                    z *= z;
                    z -= ((x - rx) * (x - rx)) + ((y - ry) * (y - ry));

                    if (z > 0.0)
                    {
                        z *= duration;
                        map[x, y] = (map[x, y] * (1.0 - z)) + (m_revertmap[x, y] * z);
                    }
                }
            }
        }

        #endregion
    }
}