opensim-development – Blame information for rev 1

Subversion Repositories:
Rev:
Rev Author Line No. Line
1 eva 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 OpenSimulator 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  
28 using System;
29 using System.Collections.Generic;
30 using System.Reflection;
31  
32 using log4net;
33 using OpenMetaverse;
34 using Mono.Addins;
35  
36 using OpenSim.Region.Framework.Interfaces;
37 using OpenSim.Region.CoreModules.World.Wind;
38  
39 namespace OpenSim.Region.CoreModules.World.Wind.Plugins
40 {
41 [Extension(Path = "/OpenSim/WindModule", NodeName = "WindModel", Id = "ConfigurableWind")]
42 class ConfigurableWind : Mono.Addins.TypeExtensionNode, IWindModelPlugin
43 {
44 private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
45  
46 private Vector2[] m_windSpeeds = new Vector2[16 * 16];
47 //private Random m_rndnums = new Random(Environment.TickCount);
48  
49 private float m_avgStrength = 5.0f; // Average magnitude of the wind vector
50 private float m_avgDirection = 0.0f; // Average direction of the wind in degrees
51 private float m_varStrength = 5.0f; // Max Strength Variance
52 private float m_varDirection = 30.0f;// Max Direction Variance
53 private float m_rateChange = 1.0f; //
54  
55 private Vector2 m_curPredominateWind = new Vector2();
56  
57  
58  
59 #region IPlugin Members
60  
61 public string Version
62 {
63 get { return "1.0.0.0"; }
64 }
65  
66 public string Name
67 {
68 get { return "ConfigurableWind"; }
69 }
70  
71 public void Initialise()
72 {
73  
74 }
75  
76 #endregion
77  
78 #region IDisposable Members
79  
80 public void Dispose()
81 {
82 m_windSpeeds = null;
83 }
84  
85 #endregion
86  
87 #region IWindModelPlugin Members
88  
89 public void WindConfig(OpenSim.Region.Framework.Scenes.Scene scene, Nini.Config.IConfig windConfig)
90 {
91 if (windConfig != null)
92 {
93 // Uses strength value if avg_strength not specified
94 m_avgStrength = windConfig.GetFloat("strength", 5.0F);
95 m_avgStrength = windConfig.GetFloat("avg_strength", 5.0F);
96  
97 m_avgDirection = windConfig.GetFloat("avg_direction", 0.0F);
98 m_varStrength = windConfig.GetFloat("var_strength", 5.0F);
99 m_varDirection = windConfig.GetFloat("var_direction", 30.0F);
100 m_rateChange = windConfig.GetFloat("rate_change", 1.0F);
101  
102 LogSettings();
103 }
104 }
105  
106 public void WindUpdate(uint frame)
107 {
108 double avgAng = m_avgDirection * (Math.PI/180.0f);
109 double varDir = m_varDirection * (Math.PI/180.0f);
110  
111 // Prevailing wind algorithm
112 // Inspired by Kanker Greenacre
113  
114 // TODO:
115 // * This should probably be based on in-world time.
116 // * should probably move all these local variables to class members and constants
117 double time = DateTime.Now.TimeOfDay.Seconds / 86400.0f;
118  
119 double theta = time * (2 * Math.PI) * m_rateChange;
120  
121 double offset = Math.Sin(theta) * Math.Sin(theta*2) * Math.Sin(theta*9) * Math.Cos(theta*4);
122  
123 double windDir = avgAng + (varDir * offset);
124  
125 offset = Math.Sin(theta) * Math.Sin(theta*4) + (Math.Sin(theta*13) / 3);
126 double windSpeed = m_avgStrength + (m_varStrength * offset);
127  
128 if (windSpeed<0)
129 windSpeed=0;
130  
131  
132  
133 m_curPredominateWind.X = (float)Math.Cos(windDir);
134 m_curPredominateWind.Y = (float)Math.Sin(windDir);
135  
136 m_curPredominateWind.Normalize();
137 m_curPredominateWind.X *= (float)windSpeed;
138 m_curPredominateWind.Y *= (float)windSpeed;
139  
140 for (int y = 0; y < 16; y++)
141 {
142 for (int x = 0; x < 16; x++)
143 {
144 m_windSpeeds[y * 16 + x] = m_curPredominateWind;
145 }
146 }
147 }
148  
149 public Vector3 WindSpeed(float fX, float fY, float fZ)
150 {
151 return new Vector3(m_curPredominateWind, 0.0f);
152 }
153  
154 public Vector2[] WindLLClientArray()
155 {
156 return m_windSpeeds;
157 }
158  
159 public string Description
160 {
161 get
162 {
163 return "Provides a predominate wind direction that can change within configured variances for direction and speed.";
164 }
165 }
166  
167 public System.Collections.Generic.Dictionary<string, string> WindParams()
168 {
169 Dictionary<string, string> Params = new Dictionary<string, string>();
170  
171 Params.Add("avgStrength", "average wind strength");
172 Params.Add("avgDirection", "average wind direction in degrees");
173 Params.Add("varStrength", "allowable variance in wind strength");
174 Params.Add("varDirection", "allowable variance in wind direction in +/- degrees");
175 Params.Add("rateChange", "rate of change");
176  
177 return Params;
178 }
179  
180 public void WindParamSet(string param, float value)
181 {
182 switch (param)
183 {
184 case "avgStrength":
185 m_avgStrength = value;
186 break;
187 case "avgDirection":
188 m_avgDirection = value;
189 break;
190 case "varStrength":
191 m_varStrength = value;
192 break;
193 case "varDirection":
194 m_varDirection = value;
195 break;
196 case "rateChange":
197 m_rateChange = value;
198 break;
199 }
200 }
201  
202 public float WindParamGet(string param)
203 {
204 switch (param)
205 {
206 case "avgStrength":
207 return m_avgStrength;
208 case "avgDirection":
209 return m_avgDirection;
210 case "varStrength":
211 return m_varStrength;
212 case "varDirection":
213 return m_varDirection;
214 case "rateChange":
215 return m_rateChange;
216 default:
217 throw new Exception(String.Format("Unknown {0} parameter {1}", this.Name, param));
218  
219 }
220 }
221  
222  
223  
224 #endregion
225  
226  
227 private void LogSettings()
228 {
229 m_log.InfoFormat("[ConfigurableWind] Average Strength : {0}", m_avgStrength);
230 m_log.InfoFormat("[ConfigurableWind] Average Direction : {0}", m_avgDirection);
231 m_log.InfoFormat("[ConfigurableWind] Varience Strength : {0}", m_varStrength);
232 m_log.InfoFormat("[ConfigurableWind] Varience Direction : {0}", m_varDirection);
233 m_log.InfoFormat("[ConfigurableWind] Rate Change : {0}", m_rateChange);
234 }
235  
236 #region IWindModelPlugin Members
237  
238  
239 #endregion
240 }
241 }