/// <summary>
/// Move the given scene object into a new region depending on which region its absolute position has moved
/// into.
///
/// This method locates the new region handle and offsets the prim position for the new region
/// </summary>
/// <param name="attemptedPosition">the attempted out of region position of the scene object</param>
/// <param name="grp">the scene object that we're crossing</param>
public void Cross(SceneObjectGroup grp, Vector3 attemptedPosition, bool silent)
{
if (grp == null)
return;
if (grp.IsDeleted)
return;
Scene scene = grp.Scene;
if (scene == null)
return;
if (grp.RootPart.DIE_AT_EDGE)
{
// We remove the object here
try
{
scene.DeleteSceneObject(grp, false);
}
catch (Exception)
{
m_log.Warn("[DATABASE]: exception when trying to remove the prim that crossed the border.");
}
return;
}
int thisx = (int)scene.RegionInfo.RegionLocX;
int thisy = (int)scene.RegionInfo.RegionLocY;
Vector3 EastCross = new Vector3(0.1f, 0, 0);
Vector3 WestCross = new Vector3(-0.1f, 0, 0);
Vector3 NorthCross = new Vector3(0, 0.1f, 0);
Vector3 SouthCross = new Vector3(0, -0.1f, 0);
// use this if no borders were crossed!
ulong newRegionHandle
= Util.UIntsToLong((uint)((thisx) * Constants.RegionSize),
(uint)((thisy) * Constants.RegionSize));
Vector3 pos = attemptedPosition;
int changeX = 1;
int changeY = 1;
if (scene.TestBorderCross(attemptedPosition + WestCross, Cardinals.W))
{
if (scene.TestBorderCross(attemptedPosition + SouthCross, Cardinals.S))
{
Border crossedBorderx = scene.GetCrossedBorder(attemptedPosition + WestCross, Cardinals.W);
if (crossedBorderx.BorderLine.Z > 0)
{
pos.X = ((pos.X + crossedBorderx.BorderLine.Z));
changeX = (int)(crossedBorderx.BorderLine.Z / (int)Constants.RegionSize);
}
else
pos.X = ((pos.X + Constants.RegionSize));
Border crossedBordery = scene.GetCrossedBorder(attemptedPosition + SouthCross, Cardinals.S);
//(crossedBorderx.BorderLine.Z / (int)Constants.RegionSize)
if (crossedBordery.BorderLine.Z > 0)
{
pos.Y = ((pos.Y + crossedBordery.BorderLine.Z));
changeY = (int)(crossedBordery.BorderLine.Z / (int)Constants.RegionSize);
}
else
pos.Y = ((pos.Y + Constants.RegionSize));
newRegionHandle
= Util.UIntsToLong((uint)((thisx - changeX) * Constants.RegionSize),
(uint)((thisy - changeY) * Constants.RegionSize));
// x - 1
// y - 1
}
else if (scene.TestBorderCross(attemptedPosition + NorthCross, Cardinals.N))
{
Border crossedBorderx = scene.GetCrossedBorder(attemptedPosition + WestCross, Cardinals.W);
if (crossedBorderx.BorderLine.Z > 0)
{
pos.X = ((pos.X + crossedBorderx.BorderLine.Z));
changeX = (int)(crossedBorderx.BorderLine.Z / (int)Constants.RegionSize);
}
else
pos.X = ((pos.X + Constants.RegionSize));
Border crossedBordery = scene.GetCrossedBorder(attemptedPosition + SouthCross, Cardinals.S);
//(crossedBorderx.BorderLine.Z / (int)Constants.RegionSize)
if (crossedBordery.BorderLine.Z > 0)
{
pos.Y = ((pos.Y + crossedBordery.BorderLine.Z));
changeY = (int)(crossedBordery.BorderLine.Z / (int)Constants.RegionSize);
}
else
pos.Y = ((pos.Y + Constants.RegionSize));
newRegionHandle
= Util.UIntsToLong((uint)((thisx - changeX) * Constants.RegionSize),
(uint)((thisy + changeY) * Constants.RegionSize));
// x - 1
// y + 1
}
else
{
Border crossedBorderx = scene.GetCrossedBorder(attemptedPosition + WestCross, Cardinals.W);
if (crossedBorderx.BorderLine.Z > 0)
{
pos.X = ((pos.X + crossedBorderx.BorderLine.Z));
changeX = (int)(crossedBorderx.BorderLine.Z / (int)Constants.RegionSize);
}
else
pos.X = ((pos.X + Constants.RegionSize));
newRegionHandle
= Util.UIntsToLong((uint)((thisx - changeX) * Constants.RegionSize),
(uint)(thisy * Constants.RegionSize));
// x - 1
}
}
else if (scene.TestBorderCross(attemptedPosition + EastCross, Cardinals.E))
{
if (scene.TestBorderCross(attemptedPosition + SouthCross, Cardinals.S))
{
pos.X = ((pos.X - Constants.RegionSize));
Border crossedBordery = scene.GetCrossedBorder(attemptedPosition + SouthCross, Cardinals.S);
//(crossedBorderx.BorderLine.Z / (int)Constants.RegionSize)
if (crossedBordery.BorderLine.Z > 0)
{
pos.Y = ((pos.Y + crossedBordery.BorderLine.Z));
changeY = (int)(crossedBordery.BorderLine.Z / (int)Constants.RegionSize);
}
else
pos.Y = ((pos.Y + Constants.RegionSize));
newRegionHandle
= Util.UIntsToLong((uint)((thisx + changeX) * Constants.RegionSize),
(uint)((thisy - changeY) * Constants.RegionSize));
// x + 1
// y - 1
}
else if (scene.TestBorderCross(attemptedPosition + NorthCross, Cardinals.N))
{
pos.X = ((pos.X - Constants.RegionSize));
pos.Y = ((pos.Y - Constants.RegionSize));
newRegionHandle
= Util.UIntsToLong((uint)((thisx + changeX) * Constants.RegionSize),
(uint)((thisy + changeY) * Constants.RegionSize));
// x + 1
// y + 1
}
else
{
pos.X = ((pos.X - Constants.RegionSize));
newRegionHandle
= Util.UIntsToLong((uint)((thisx + changeX) * Constants.RegionSize),
(uint)(thisy * Constants.RegionSize));
// x + 1
}
}
else if (scene.TestBorderCross(attemptedPosition + SouthCross, Cardinals.S))
{
Border crossedBordery = scene.GetCrossedBorder(attemptedPosition + SouthCross, Cardinals.S);
//(crossedBorderx.BorderLine.Z / (int)Constants.RegionSize)
if (crossedBordery.BorderLine.Z > 0)
{
pos.Y = ((pos.Y + crossedBordery.BorderLine.Z));
changeY = (int)(crossedBordery.BorderLine.Z / (int)Constants.RegionSize);
}
else
pos.Y = ((pos.Y + Constants.RegionSize));
newRegionHandle
= Util.UIntsToLong((uint)(thisx * Constants.RegionSize), (uint)((thisy - changeY) * Constants.RegionSize));
// y - 1
}
else if (scene.TestBorderCross(attemptedPosition + NorthCross, Cardinals.N))
{
pos.Y = ((pos.Y - Constants.RegionSize));
newRegionHandle
= Util.UIntsToLong((uint)(thisx * Constants.RegionSize), (uint)((thisy + changeY) * Constants.RegionSize));
// y + 1
}
// Offset the positions for the new region across the border
Vector3 oldGroupPosition = grp.RootPart.GroupPosition;
// If we fail to cross the border, then reset the position of the scene object on that border.
uint x = 0, y = 0;
Utils.LongToUInts(newRegionHandle, out x, out y);
GridRegion destination = scene.GridService.GetRegionByPosition(scene.RegionInfo.ScopeID, (int)x, (int)y);
if (destination == null || !CrossPrimGroupIntoNewRegion(destination, pos, grp, silent))
{
m_log.InfoFormat("[ENTITY TRANSFER MODULE] cross region transfer failed for object {0}",grp.UUID);
// We are going to move the object back to the old position so long as the old position
// is in the region
oldGroupPosition.X = Util.Clamp<float>(oldGroupPosition.X,1.0f,(float)Constants.RegionSize-1);
oldGroupPosition.Y = Util.Clamp<float>(oldGroupPosition.Y,1.0f,(float)Constants.RegionSize-1);
oldGroupPosition.Z = Util.Clamp<float>(oldGroupPosition.Z,1.0f,4096.0f);
grp.RootPart.GroupPosition = oldGroupPosition;
// Need to turn off the physics flags, otherwise the object will continue to attempt to
// move out of the region creating an infinite loop of failed attempts to cross
grp.UpdatePrimFlags(grp.RootPart.LocalId,false,grp.IsTemporary,grp.IsPhantom,false);
grp.ScheduleGroupForFullUpdate();
}
}
