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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 OpenSimulator 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 System.Collections.Generic;
- using System.Reflection;
- using log4net;
- using OpenMetaverse;
- using Mono.Addins;
- using OpenSim.Region.Framework.Interfaces;
- using OpenSim.Region.CoreModules.World.Wind;
- namespace OpenSim.Region.CoreModules.World.Wind.Plugins
- {
- [Extension(Path = "/OpenSim/WindModule", NodeName = "WindModel", Id = "ConfigurableWind")]
- class ConfigurableWind : Mono.Addins.TypeExtensionNode, IWindModelPlugin
- {
- private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
- private Vector2[] m_windSpeeds = new Vector2[16 * 16];
- //private Random m_rndnums = new Random(Environment.TickCount);
- private float m_avgStrength = 5.0f; // Average magnitude of the wind vector
- private float m_avgDirection = 0.0f; // Average direction of the wind in degrees
- private float m_varStrength = 5.0f; // Max Strength Variance
- private float m_varDirection = 30.0f;// Max Direction Variance
- private float m_rateChange = 1.0f; //
- private Vector2 m_curPredominateWind = new Vector2();
- #region IPlugin Members
- public string Version
- {
- get { return "1.0.0.0"; }
- }
- public string Name
- {
- get { return "ConfigurableWind"; }
- }
- public void Initialise()
- {
-
- }
- #endregion
- #region IDisposable Members
- public void Dispose()
- {
- m_windSpeeds = null;
- }
- #endregion
- #region IWindModelPlugin Members
- public void WindConfig(OpenSim.Region.Framework.Scenes.Scene scene, Nini.Config.IConfig windConfig)
- {
- if (windConfig != null)
- {
- // Uses strength value if avg_strength not specified
- m_avgStrength = windConfig.GetFloat("strength", 5.0F);
- m_avgStrength = windConfig.GetFloat("avg_strength", 5.0F);
- m_avgDirection = windConfig.GetFloat("avg_direction", 0.0F);
- m_varStrength = windConfig.GetFloat("var_strength", 5.0F);
- m_varDirection = windConfig.GetFloat("var_direction", 30.0F);
- m_rateChange = windConfig.GetFloat("rate_change", 1.0F);
- LogSettings();
- }
- }
- public void WindUpdate(uint frame)
- {
- double avgAng = m_avgDirection * (Math.PI/180.0f);
- double varDir = m_varDirection * (Math.PI/180.0f);
- // Prevailing wind algorithm
- // Inspired by Kanker Greenacre
- // TODO:
- // * This should probably be based on in-world time.
- // * should probably move all these local variables to class members and constants
- double time = DateTime.Now.TimeOfDay.Seconds / 86400.0f;
- double theta = time * (2 * Math.PI) * m_rateChange;
- double offset = Math.Sin(theta) * Math.Sin(theta*2) * Math.Sin(theta*9) * Math.Cos(theta*4);
- double windDir = avgAng + (varDir * offset);
- offset = Math.Sin(theta) * Math.Sin(theta*4) + (Math.Sin(theta*13) / 3);
- double windSpeed = m_avgStrength + (m_varStrength * offset);
- if (windSpeed<0)
- windSpeed=0;
- m_curPredominateWind.X = (float)Math.Cos(windDir);
- m_curPredominateWind.Y = (float)Math.Sin(windDir);
- m_curPredominateWind.Normalize();
- m_curPredominateWind.X *= (float)windSpeed;
- m_curPredominateWind.Y *= (float)windSpeed;
- for (int y = 0; y < 16; y++)
- {
- for (int x = 0; x < 16; x++)
- {
- m_windSpeeds[y * 16 + x] = m_curPredominateWind;
- }
- }
- }
- public Vector3 WindSpeed(float fX, float fY, float fZ)
- {
- return new Vector3(m_curPredominateWind, 0.0f);
- }
- public Vector2[] WindLLClientArray()
- {
- return m_windSpeeds;
- }
- public string Description
- {
- get
- {
- return "Provides a predominate wind direction that can change within configured variances for direction and speed.";
- }
- }
- public System.Collections.Generic.Dictionary<string, string> WindParams()
- {
- Dictionary<string, string> Params = new Dictionary<string, string>();
- Params.Add("avgStrength", "average wind strength");
- Params.Add("avgDirection", "average wind direction in degrees");
- Params.Add("varStrength", "allowable variance in wind strength");
- Params.Add("varDirection", "allowable variance in wind direction in +/- degrees");
- Params.Add("rateChange", "rate of change");
- return Params;
- }
- public void WindParamSet(string param, float value)
- {
- switch (param)
- {
- case "avgStrength":
- m_avgStrength = value;
- break;
- case "avgDirection":
- m_avgDirection = value;
- break;
- case "varStrength":
- m_varStrength = value;
- break;
- case "varDirection":
- m_varDirection = value;
- break;
- case "rateChange":
- m_rateChange = value;
- break;
- }
- }
- public float WindParamGet(string param)
- {
- switch (param)
- {
- case "avgStrength":
- return m_avgStrength;
- case "avgDirection":
- return m_avgDirection;
- case "varStrength":
- return m_varStrength;
- case "varDirection":
- return m_varDirection;
- case "rateChange":
- return m_rateChange;
- default:
- throw new Exception(String.Format("Unknown {0} parameter {1}", this.Name, param));
- }
- }
- #endregion
- private void LogSettings()
- {
- m_log.InfoFormat("[ConfigurableWind] Average Strength : {0}", m_avgStrength);
- m_log.InfoFormat("[ConfigurableWind] Average Direction : {0}", m_avgDirection);
- m_log.InfoFormat("[ConfigurableWind] Varience Strength : {0}", m_varStrength);
- m_log.InfoFormat("[ConfigurableWind] Varience Direction : {0}", m_varDirection);
- m_log.InfoFormat("[ConfigurableWind] Rate Change : {0}", m_rateChange);
- }
- #region IWindModelPlugin Members
- #endregion
- }
- }
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