FlattenSphere.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;
using OpenSim.Region.Framework.Scenes;

namespace OpenSim.Region.CoreModules.World.Terrain.PaintBrushes
{
    public class FlattenSphere : 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)
        {
            strength = TerrainUtil.MetersToSphericalStrength(strength);

            int x, y;

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

                    double z;
                    if (duration < 4.0)
                    {
                        z = TerrainUtil.SphericalFactor(x, y, rx, ry, strength) * duration * 0.25;
                    }
                    else {
                        z = 1.0;
                    }

                    double delta = rz - map[x, y];
                    if (Math.Abs(delta) > 0.1)
                    {
                        if (z > 1.0)
                        {
                            z = 1.0;
                        }
                        else if (z < 0.0)
                        {
                            z = 0.0;
                        }
                        delta *= z;
                    }

                    if (delta != 0) // add in non-zero amount
                    {
                        map[x, y] += delta;
                    }
 
                }
            }
        }

        #endregion
    }
}