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-rw-r--r--OpenSim/Region/Environment/Modules/Terrain/PaintBrushes/FlattenSphere.cs125
1 files changed, 125 insertions, 0 deletions
diff --git a/OpenSim/Region/Environment/Modules/Terrain/PaintBrushes/FlattenSphere.cs b/OpenSim/Region/Environment/Modules/Terrain/PaintBrushes/FlattenSphere.cs
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1/*
2* Copyright (c) Contributors, http://opensimulator.org/
3* See CONTRIBUTORS.TXT for a full list of copyright holders.
4*
5* Redistribution and use in source and binary forms, with or without
6* modification, are permitted provided that the following conditions are met:
7* * Redistributions of source code must retain the above copyright
8* notice, this list of conditions and the following disclaimer.
9* * Redistributions in binary form must reproduce the above copyright
10* notice, this list of conditions and the following disclaimer in the
11* documentation and/or other materials provided with the distribution.
12* * Neither the name of the OpenSim Project nor the
13* names of its contributors may be used to endorse or promote products
14* derived from this software without specific prior written permission.
15*
16* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
17* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
20* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26*
27*/
28using OpenSim.Region.Environment.Interfaces;
29
30namespace OpenSim.Region.Environment.Modules.Terrain.PaintBrushes
31{
32 public class FlattenSphere : ITerrainPaintableEffect
33 {
34 private double SphericalFactor(double x, double y, double rx, double ry, double size)
35 {
36 double z = size * size - ((x - rx) * (x - rx) + (y - ry) * (y - ry));
37 return z;
38 }
39
40 private double GetBilinearInterpolate(double x, double y, ITerrainChannel map)
41 {
42 int w = map.Width;
43 int h = map.Height;
44
45 if (x > w - 2.0)
46 x = w - 2.0;
47 if (y > h - 2.0)
48 y = h - 2.0;
49 if (x < 0.0)
50 x = 0.0;
51 if (y < 0.0)
52 y = 0.0;
53
54 int stepSize = 1;
55 double h00 = map[(int)x, (int)y];
56 double h10 = map[(int)x + stepSize, (int)y];
57 double h01 = map[(int)x, (int)y + stepSize];
58 double h11 = map[(int)x + stepSize, (int)y + stepSize];
59 double h1 = h00;
60 double h2 = h10;
61 double h3 = h01;
62 double h4 = h11;
63 double a00 = h1;
64 double a10 = h2 - h1;
65 double a01 = h3 - h1;
66 double a11 = h1 - h2 - h3 + h4;
67 double partialx = x - (int)x;
68 double partialz = y - (int)y;
69 double hi = a00 + (a10 * partialx) + (a01 * partialz) + (a11 * partialx * partialz);
70 return hi;
71 }
72
73 #region ITerrainPaintableEffect Members
74
75 public void PaintEffect(ITerrainChannel map, double rx, double ry, double strength)
76 {
77 int x, y;
78 double[,] tweak = new double[map.Width, map.Height];
79
80 double n, l;
81 double area = strength;
82 double step = strength / 4.0;
83
84 double sum = 0.0;
85 double step2 = 0.0;
86 double avg = 0.0;
87
88 // compute delta map
89 for (x = 0; x < map.Width; x++)
90 {
91 for (y = 0; y < map.Height; y++)
92 {
93 double z = SphericalFactor(x, y, rx, ry, strength);
94
95 if (z > 0) // add in non-zero amount
96 {
97 sum += map[x, y] * z;
98 step2 += z;
99 }
100 }
101 }
102
103 avg = sum / step2;
104
105 // blend in map
106 for (x = 0; x < map.Width; x++)
107 {
108 for (y = 0; y < map.Height; y++)
109 {
110 double z = SphericalFactor(x, y, rx, ry, strength);
111
112 if (z > 0) // add in non-zero amount
113 {
114 if (z > 1.0)
115 z = 1.0;
116
117 map[x, y] = (map[x, y] * (1.0 - z)) + (avg * z);
118 }
119 }
120 }
121 }
122
123 #endregion
124 }
125} \ No newline at end of file