private uint ComputeAngleDistancePriority(ScenePresence presence, ISceneEntity entity)
{
// And convert the distance to a priority queue, this computation gives queues
// at 10, 20, 40, 80, 160, 320, 640, and 1280m
// uint minpqueue = PriorityQueue.NumberOfImmediateQueues;
uint maxqueue = PriorityQueue.NumberOfQueues - PriorityQueue.NumberOfImmediateQueues - 1;
// uint pqueue = minpqueue;
uint pqueue = PriorityQueue.NumberOfImmediateQueues;
float distance;
Vector3 presencePos = presence.AbsolutePosition;
if (entity is ScenePresence)
{
ScenePresence sp = entity as ScenePresence;
distance = Vector3.Distance(presencePos, sp.AbsolutePosition);
distance *= 0.5f;
}
else
{
SceneObjectGroup group = (entity as SceneObjectPart).ParentGroup;
float bradius = group.GetBoundsRadius();
Vector3 grppos = group.AbsolutePosition + group.getBoundsCenter();
distance = Vector3.Distance(presencePos, grppos);
distance -= bradius;
distance *= group.getAreaFactor();
if (group.IsAttachment)
{
distance *= 0.5f;
}
else if (group.UsesPhysics)
{
distance *= 0.6f;
}
else if (group.GetSittingAvatarsCount() > 0)
{
distance *= 0.5f;
}
}
if (distance > 10f)
{
float tmp = (float)Math.Log(distance) * 1.442695f - 3.321928f;
// for a map identical to original:
// now
// 1st constant is 1/(log(2)) (natural log) so we get log2(distance)
// 2st constant makes it be log2(distance/10)
pqueue += (uint)tmp;
if (pqueue > maxqueue)
{
pqueue = maxqueue;
}
}
return(pqueue);
}
