RaiseSphere.cs

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 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
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using System;
using OpenSim.Region.Framework.Interfaces;

namespace OpenSim.Region.CoreModules.World.Terrain.PaintBrushes
{
    public class RaiseSphere : ITerrainPaintableEffect
    {
        #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)
        {
            int s = (int) (Math.Pow(2, strength) + 0.5);

            int x,y;

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

                    // Calculate a cos-sphere and add it to the heighmap
                    double r = Math.Sqrt((x - rx) * (x - rx) + ((y - ry) * (y - ry)));
                    double z = Math.Cos(r * Math.PI / (s * 2));
                    if (z > 0.0)
                        map[x, y] += z * duration;
                }
            }
        }

        #endregion
    }
}