3 files changed, 85 insertions, 31 deletions

diff --git a/OpenSim/Region/Environment/Modules/World/Terrain/PaintBrushes/LowerSphere.cs b/OpenSim/Region/Environment/Modules/World/Terrain/PaintBrushes/LowerSphere.cs
index fe82396..745d3da 100644
--- a/OpenSim/Region/Environment/Modules/World/Terrain/PaintBrushes/LowerSphere.cs
+++ b/OpenSim/Region/Environment/Modules/World/Terrain/PaintBrushes/LowerSphere.cs
@@ -36,29 +36,49 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.PaintBrushes
 
         public void PaintEffect(ITerrainChannel map, bool[,] mask, double rx, double ry, double rz, double strength, double duration)
         {
-            strength = TerrainUtil.MetersToSphericalStrength(strength);
-            duration = 0.03; //MCP Should be read from ini file
- 
+            int s = (int) (Math.Pow(2, strength) + 0.5);
+
             int x;
-            for (x = 0; x < map.Width; 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 = 0; y < map.Height; y++)
+                for (y = yFrom; y < yTo; y++)
                 {
                     if (!mask[x,y])
                         continue;
 
-                    // Calculate a sphere and add it to the heighmap
-                    double z = strength;
-                    z *= z;
-                    z -= ((x - rx) * (x - rx)) + ((y - ry) * (y - ry));
-
+                    // 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;
+                    {
+                        double newz = map[x, y] - z * duration;
+                        if (newz < 0.0)
+                            map[x, y] = 0.0;
+                        else
+                            map[x, y] = newz;
+                    } 
                 }
             }
-        }
 
+        }
         #endregion
     }
 }
diff --git a/OpenSim/Region/Environment/Modules/World/Terrain/PaintBrushes/RaiseSphere.cs b/OpenSim/Region/Environment/Modules/World/Terrain/PaintBrushes/RaiseSphere.cs
index 92bac63..56813ab 100644
--- a/OpenSim/Region/Environment/Modules/World/Terrain/PaintBrushes/RaiseSphere.cs
+++ b/OpenSim/Region/Environment/Modules/World/Terrain/PaintBrushes/RaiseSphere.cs
@@ -37,23 +37,37 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.PaintBrushes
 
         public void PaintEffect(ITerrainChannel map, bool[,] mask, double rx, double ry, double rz, double strength, double duration)
         {
-            duration = 0.03; //MCP Should be read from ini file
-            strength = TerrainUtil.MetersToSphericalStrength(strength);
+            int s = (int) (Math.Pow(2, strength) + 0.5);
 
             int x;
-            for (x = 0; x < map.Width; 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 = 0; y < map.Height; y++)
+                for (y = yFrom; y < yTo; y++)
                 {
                     if (!mask[x,y])
                         continue;
 
-                    // Calculate a sphere and add it to the heighmap
-                    double z = strength;
-                    z *= z;
-                    z -= ((x - rx) * (x - rx)) + ((y - ry) * (y - ry));
-
+                    // 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;
                 }
diff --git a/OpenSim/Region/Environment/Modules/World/Terrain/Tests/TerrainTest.cs b/OpenSim/Region/Environment/Modules/World/Terrain/Tests/TerrainTest.cs
index 5b4bc8c..3511988 100644
--- a/OpenSim/Region/Environment/Modules/World/Terrain/Tests/TerrainTest.cs
+++ b/OpenSim/Region/Environment/Modules/World/Terrain/Tests/TerrainTest.cs
@@ -37,30 +37,50 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain.Tests
         [Test]
         public void BrushTest()
         {
-            TerrainChannel map = new TerrainChannel(256, 256);
-            bool[,] allowMask = new bool[map.Width,map.Height];
+            bool[,] allowMask = new bool[256, 256];
             int x;
             int y;
-            for (x=0; x<map.Width; x++)
+            for (x=0; x<128; x++)
             {
-                for (y=0; y<map.Height; y++)
+                for (y=0; y<256; y++)
                 {
                     allowMask[x,y] = true;
                 }
             }
 
+            //
+            // Test RaiseSphere
+            //
+            TerrainChannel map = new TerrainChannel(256, 256);
             ITerrainPaintableEffect effect = new RaiseSphere();
 
-            effect.PaintEffect(map, allowMask, 128.0, 128.0, 23.0, 100, 0.1);
-            Assert.That(map[128, 128] > 0.0, "Raise brush not raising values.");
-            Assert.That(map[0, 128] > 0.0, "Raise brush lowering edge values.");
+            effect.PaintEffect(map, allowMask, 128.0, 128.0, -1.0, 2, 0.1);
+            Assert.That(map[127, 128] > 0.0, "Raise brush should raising value at this point (127,128).");
+            Assert.That(map[124, 128] > 0.0, "Raise brush should raising value at this point (124,128).");
+            Assert.That(map[123, 128] == 0.0, "Raise brush should not change value at this point (123,128).");
+            Assert.That(map[128, 128] == 0.0, "Raise brush should not change value at this point (128,128).");
+            Assert.That(map[0, 128] == 0.0, "Raise brush should not change value at this point (0,128).");
 
+            //
+            // Test LowerSphere
+            //
             map = new TerrainChannel(256, 256);
+            for (x=0; x<map.Width; x++)
+            {
+                for (y=0; y<map.Height; y++)
+                {
+                    map[x,y] = 1.0;
+                }
+            }
             effect = new LowerSphere();
 
-            effect.PaintEffect(map, allowMask, 128.0, 128.0, -1, 100, 0.1);
-            Assert.That(map[128, 128] < 0.0, "Lower not lowering values.");
-            Assert.That(map[0, 128] < 0.0, "Lower brush affecting edge values.");
+            effect.PaintEffect(map, allowMask, 128.0, 128.0, -1.0, 2, 6.0);
+            Assert.That(map[127, 128] >= 0.0, "Lower should not lowering value below 0.0 at this point (127,128).");
+            Assert.That(map[127, 128] == 0.0, "Lower brush should lowering value to 0.0 at this point (127,128).");
+            Assert.That(map[124, 128] < 1.0, "Lower brush should lowering value at this point (124,128).");
+            Assert.That(map[123, 128] == 1.0, "Lower brush should not change value at this point (123,128).");
+            Assert.That(map[128, 128] == 1.0, "Lower brush should not change value at this point (128,128).");
+            Assert.That(map[0, 128] == 1.0, "Lower brush should not change value at this point (0,128).");
         }
 
         [Test]