OpenSim-Test/OpenSim/Region/Environment/Modules/World/Terrain/PaintBrushes/RaiseSphere.cs

/*
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 * See CONTRIBUTORS.TXT for a full list of copyright holders.
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 * modification, are permitted provided that the following conditions are met:
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 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
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 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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 */

using System;
using OpenSim.Region.Environment.Interfaces;

namespace OpenSim.Region.Environment.Modules.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 s = (int) (Math.Pow(2, strength) + 0.5);

            int x;
            int xFrom = (int)(rx-s+0.5);
            int xTo   = (int)(rx+s+0.5) + 1;
            int yFrom = (int)(ry-s+0.5);
            int yTo   = (int)(ry+s+0.5) + 1;

            if (xFrom < 0)
                xFrom = 0;

            if (yFrom < 0)
                yFrom = 0;

            if (xTo > map.Width)
                xTo = map.Width;

            if (yTo > map.Width)
                yTo = map.Width;

            for (x = xFrom; x < xTo; x++)
            {
                int y;
                for (y = yFrom; y < yTo; 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
    }
}