From 8f6f85e530b84217d14aa9f9c198e7ad14f18c03 Mon Sep 17 00:00:00 2001
From: Adam Frisby
Date: Sat, 8 Mar 2008 19:11:22 +0000
Subject: * Implemented 'Revert' channel in Terrain Module. * Added Revert
 Area, flood brush. * Added Revert Sphere, paint brush.

---
 .../Modules/Terrain/PaintBrushes/RevertSphere.cs   | 75 ++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 OpenSim/Region/Environment/Modules/Terrain/PaintBrushes/RevertSphere.cs

(limited to 'OpenSim/Region/Environment/Modules/Terrain/PaintBrushes')

diff --git a/OpenSim/Region/Environment/Modules/Terrain/PaintBrushes/RevertSphere.cs b/OpenSim/Region/Environment/Modules/Terrain/PaintBrushes/RevertSphere.cs
new file mode 100644
index 0000000..e7ce68e
--- /dev/null
+++ b/OpenSim/Region/Environment/Modules/Terrain/PaintBrushes/RevertSphere.cs
@@ -0,0 +1,75 @@
+/*
+* 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.Terrain.PaintBrushes
+{
+    public class RevertSphere : ITerrainPaintableEffect
+    {
+        ITerrainChannel m_revertmap;
+
+        public RevertSphere(ITerrainChannel revertmap)
+        {
+            m_revertmap = revertmap;
+        }
+
+        #region ITerrainPaintableEffect Members
+
+        public void PaintEffect(ITerrainChannel map, double rx, double ry, double strength, double duration)
+        {
+            int x, y;
+            for (x = 0; x < map.Width; x++)
+            {
+                // Skip everything unlikely to be affected
+                if (Math.Abs(x - rx) > strength * 1.1)
+                    continue;
+
+                for (y = 0; y < map.Height; y++)
+                {
+                    // Skip everything unlikely to be affected
+                    if (Math.Abs(y - ry) > strength * 1.1)
+                        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
+    }
+}
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