private void RefreshLineOfSight(ILineOfSightEntity lineOfSightEntity, int needRefreshBits)
{
if (!lineOfSightEntity.LineOfSightActive)
{
return;
}
MajorEmpire majorEmpire = lineOfSightEntity.Empire as MajorEmpire;
if (majorEmpire == null)
{
return;
}
short num = (short)(majorEmpire.Bits | lineOfSightEntity.EmpireInfiltrationBits);
if ((needRefreshBits & (int)num) == 0)
{
return;
}
lineOfSightEntity.LineOfSightDirty = false;
if (!lineOfSightEntity.WorldPosition.IsValid)
{
return;
}
WorldParameters worldParameters = this.world.WorldParameters;
int lineOfSightVisionRange = lineOfSightEntity.LineOfSightVisionRange;
int lineOfSightVisionHeight = lineOfSightEntity.LineOfSightVisionHeight;
int num2 = 0;
if (lineOfSightEntity.LineOfSightData == null)
{
lineOfSightEntity.LineOfSightData = new LineOfSightData();
}
LineOfSightData lineOfSightData = lineOfSightEntity.LineOfSightData;
if (lineOfSightVisionRange < 0)
{
return;
}
short num3 = (short)lineOfSightVisionRange;
if (this.tempRect == null)
{
this.tempRect = new WorldRect(lineOfSightEntity.WorldPosition, WorldOrientation.East, num3, num3, num3, num3, worldParameters);
}
else
{
this.tempRect.Update(lineOfSightEntity.WorldPosition, WorldOrientation.East, num3, num3, num3, num3, worldParameters);
}
this.rectVirtualPositions.Clear();
this.tempRect.FillVirtualWorldPositions(ref this.rectVirtualPositions);
VisibilityController.Position position = new VisibilityController.Position(WorldPosition.Invalid, WorldPosition.Invalid, -1);
for (int i = 0; i < this.rectVirtualPositions.Count; i++)
{
if (lineOfSightEntity.WorldPosition == WorldPosition.GetValidPosition(this.rectVirtualPositions[i], worldParameters))
{
position = new VisibilityController.Position(this.rectVirtualPositions[i], lineOfSightEntity.WorldPosition, 0);
break;
}
}
Diagnostics.Assert(position.ValidWorldPosition.IsValid);
this.potentialPositions.Clear();
for (int j = 0; j < this.rectVirtualPositions.Count; j++)
{
WorldPosition worldPosition = this.rectVirtualPositions[j];
WorldPosition validPosition = WorldPosition.GetValidPosition(worldPosition, worldParameters);
if (validPosition.IsValid)
{
int distance = WorldPosition.GetDistance(position.ValidWorldPosition, validPosition, worldParameters.IsCyclicWorld, worldParameters.Columns);
if (distance <= lineOfSightVisionRange)
{
this.potentialPositions.Add(new VisibilityController.Position(worldPosition, validPosition, distance));
}
}
}
this.potentialPositions.Sort((VisibilityController.Position position1, VisibilityController.Position position2) => position1.Distance.CompareTo(position2.Distance));
lineOfSightData.Arcs.Clear();
float radius = ((float)lineOfSightVisionRange + 0.1f) * 2f * Hexagon.One.Radius;
lineOfSightData.Arcs.AddFirst(new Arc(position.GeometryPosition, 0f, 6.28308535f, radius));
bool flag = this.EnableDetection;
if (flag)
{
num2 = lineOfSightEntity.LineOfSightDetectionRange;
flag &= (num2 > 0);
}
for (int k = 0; k < this.potentialPositions.Count; k++)
{
VisibilityController.Position obstaclePosition = this.potentialPositions[k];
bool flag2 = obstaclePosition.Distance > lineOfSightVisionRange || this.IsWorldPositionObstructingVision(position.ValidWorldPosition, obstaclePosition.ValidWorldPosition, lineOfSightVisionHeight, lineOfSightEntity.IgnoreFog);
if (flag && obstaclePosition.Distance > num2)
{
flag = false;
}
LinkedListNode <Arc> linkedListNode = lineOfSightData.Arcs.First;
while (linkedListNode != null)
{
Arc value = linkedListNode.Value;
linkedListNode = linkedListNode.Next;
if (flag2)
{
if (Helper.IsHexagonIntersectArc(value, obstaclePosition.GeometryPosition))
{
this.SplitArc(lineOfSightData, value, obstaclePosition);
this.SetWorldPositionAsExplored(obstaclePosition.ValidWorldPosition, majorEmpire, num);
}
}
else if (value.Contains(obstaclePosition.GeometryPosition))
{
if (flag)
{
this.SetWorldPositionAsDetected(obstaclePosition.ValidWorldPosition, majorEmpire, num, lineOfSightEntity.VisibilityAccessibilityLevel);
break;
}
this.SetWorldPositionAsVisible(obstaclePosition.ValidWorldPosition, majorEmpire, num, lineOfSightEntity.VisibilityAccessibilityLevel);
break;
}
}
}
}