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/*
* Copyright (c) Contributors, http://opensimulator.org/
* See CONTRIBUTORS.TXT for a full list of copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of the OpenSim Project nor the
* 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
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
using System;
using OpenSim.Region.Environment.Interfaces;
namespace OpenSim.Region.Environment.Modules.World.Terrain.PaintBrushes
{
public class LowerSphere : 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)
{
double newz = map[x, y] - z * duration;
if (newz < 0.0)
map[x, y] = 0.0;
else
map[x, y] = newz;
}
}
}
}
#endregion
}
}
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