/* * 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 OpenSim.Region.Framework.Interfaces; using OpenSim.Region.CoreModules.World.Wind; namespace OpenSim.Region.CoreModules.World.Wind.Plugins { 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; 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 WindParams() { Dictionary Params = new Dictionary(); 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 } }