opensim – Rev 1
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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 OpenSim.Framework;
using OpenSim.Region.Framework.Scenes;
using OpenSim.Services.Interfaces;
using GridRegion = OpenSim.Services.Interfaces.GridRegion;
using OpenMetaverse;
using log4net;
namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Grid
{
public class RegionCache
{
private static readonly ILog m_log =
LogManager.GetLogger(
MethodBase.GetCurrentMethod().DeclaringType);
private Scene m_scene;
private Dictionary<ulong, GridRegion> m_neighbours = new Dictionary<ulong, GridRegion>();
public string RegionName
{
get { return m_scene.RegionInfo.RegionName; }
}
public RegionCache(Scene s)
{
m_scene = s;
m_scene.EventManager.OnRegionUp += OnRegionUp;
}
private void OnRegionUp(GridRegion otherRegion)
{
// This shouldn't happen
if (otherRegion == null)
return;
m_log.DebugFormat("[REGION CACHE]: (on region {0}) Region {1} is up @ {2}-{3}",
m_scene.RegionInfo.RegionName, otherRegion.RegionName, Util.WorldToRegionLoc((uint)otherRegion.RegionLocX), Util.WorldToRegionLoc((uint)otherRegion.RegionLocY));
m_neighbours[otherRegion.RegionHandle] = otherRegion;
}
public void Clear()
{
m_scene.EventManager.OnRegionUp -= OnRegionUp;
m_neighbours.Clear();
}
public List<GridRegion> GetNeighbours()
{
return new List<GridRegion>(m_neighbours.Values);
}
// Get a region given its base coordinates (in meters).
// NOTE: this is NOT 'get a region by some point in the region'. The coordinate MUST
// be the base coordinate of the region.
// The snapping is technically unnecessary but is harmless because regions are always
// multiples of the legacy region size (256).
public GridRegion GetRegionByPosition(int x, int y)
{
uint xsnap = (uint)(x / Constants.RegionSize) * Constants.RegionSize;
uint ysnap = (uint)(y / Constants.RegionSize) * Constants.RegionSize;
ulong handle = Util.RegionWorldLocToHandle(xsnap, ysnap);
if (m_neighbours.ContainsKey(handle))
return m_neighbours[handle];
return null;
}
}
}