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change the GetFallbackRegions sort code

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UbitUmarov
2021-09-02 17:22:59 +01:00
parent 58df13587f
commit 9b840f1f9e
6 changed files with 41 additions and 40 deletions
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30
OpenSim/Data/IRegionData.cs
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@@ -84,29 +84,39 @@ namespace OpenSim.Data
List<RegionData> GetDefaultRegions(UUID scopeID);
List<RegionData> GetDefaultHypergridRegions(UUID scopeID);
List<RegionData> GetFallbackRegions(UUID scopeID, int x, int y);
List<RegionData> GetFallbackRegions(UUID scopeID);
List<RegionData> GetHyperlinks(UUID scopeID);
}
public class RegionDataDistanceCompare : IComparer<RegionData>
{
private Vector2 m_origin;
private float m_originX;
private float m_originY;
public RegionDataDistanceCompare(int x, int y)
{
m_origin = new Vector2(x, y);
m_originX = x;
m_originY = y;
}
public int Compare(RegionData regionA, RegionData regionB)
{
Vector2 vectorA = new Vector2(regionA.posX, regionA.posY);
Vector2 vectorB = new Vector2(regionB.posX, regionB.posY);
return Math.Sign(VectorDistance(m_origin, vectorA) - VectorDistance(m_origin, vectorB));
}
float dx = regionA.posX - m_originX;
if (dx < 0)
dx += regionA.sizeX - 1;
float dy = regionA.posY - m_originY;
if (dy < 0)
dy += regionA.sizeY - 1;
float da = dx * dx - dy * dy;
private float VectorDistance(Vector2 x, Vector2 y)
{
return (x - y).Length();
dx = regionB.posX - m_originX;
if (dx < 0)
dx += regionB.sizeX - 1;
dy = regionB.posY - m_originY;
if (dy < 0)
dy += regionB.sizeY - 1;
float db = dx * dx - dy * dy;
return da.CompareTo(db);
}
}
}