/// <summary>
/// Determines if a given entity is on a free line of sight.
/// </summary>
public bool IsInView(IMyEntity Target, out Vector3D?HitPosition)
{
HitPosition = null;
try
{
float RayPower = Radar.ActiveRadar ? Radar.PowerModule.EffectiveRadarPower : 800;
if (Radar.MyRadarGrid == null || Radar.MyRadarGrid.Grid == null)
{
RadarCore.LogError("IsInView", new Exception("Radar's RadarableGrid is null!"), IsExcessive: true);
return(false);
}
LineD LineRay = new LineD(Radar.Position, Target.GetPosition());
if (LineRay.Length <= RadarCore.GuaranteedDetectionRange)
{
return(true);
}
List <MyLineSegmentOverlapResult <MyEntity> > Overlaps = new List <MyLineSegmentOverlapResult <MyEntity> >();
MyGamePruningStructure.GetTopmostEntitiesOverlappingRay(ref LineRay, Overlaps);
if (Overlaps == null || Overlaps.Count == 0)
{
return(false);
}
var TargetTop = Target.GetTopMostParent();
if (TargetTop == null)
{
RadarCore.LogError("IsInView", new Exception("Target's topmost parent is null!"));
return(false);
}
var RadarTop = Radar.MyRadarGrid.Grid.GetTopMostParent();
if (TargetTop == null)
{
RadarCore.LogError("IsInView", new Exception("Radar's topmost parent is null!"));
return(false);
}
foreach (var Overlap in Overlaps)
{
try
{
if (Overlap.Element == null || Overlap.Element.Physics == null)
{
continue;
}
LineD Intersect;
var Entity = Overlap.Element as IMyEntity;
if (!Entity.WorldAABB.Valid)
{
RadarCore.DebugWrite("IsInView.Iterate", "Found an entity with invalid WorldAABB. Skipping.", IsExcessive: true);
continue;
}
if (Entity is IMyCubeGrid)
{
Entity.WorldAABB.Intersect(ref LineRay, out Intersect);
}
else
{
Entity.WorldVolume.Intersect(ref LineRay, out Intersect);
}
var OverlapTop = Entity.GetTopMostParent();
if (OverlapTop == null)
{
RadarCore.DebugWrite("IsInView.Iterate", "Found an entity with invalid topmost parent. Skipping.", IsExcessive: true);
continue;
}
if (OverlapTop is MyPlanet)
{
MyPlanet Planet = OverlapTop as MyPlanet;
if (Planet.HasAtmosphere)
{
BoundingSphereD Atmosphere = new BoundingSphereD(Planet.PositionComp.GetPosition(), Planet.AtmosphereRadius);
LineD AtmoIntersect;
Atmosphere.Intersect(ref LineRay, out AtmoIntersect);
float Diminish = (float)(AtmoIntersect.Length * RadarCore.AtmoRayDiminishingCoefficient);
RayPower -= Diminish;
if (RayPower <= 0)
{
return(false);
}
}
Vector3D TargetPos = Target.GetPosition();
if (Vector3D.DistanceSquared(Planet.GetClosestSurfacePointGlobal(ref TargetPos), TargetPos) < 1000 * 1000)
{
return(false);
}
}
else if (OverlapTop == TargetTop)
{
HitPosition = Intersect.From;
return(true);
}
else if (OverlapTop == RadarTop)
{
if (OverlapTop.GetPosition().DistanceTo(Radar.Position) > 1000)
{
List <Vector3I> GridHits = new List <Vector3I>();
Radar.MyRadarGrid.Grid.RayCastCells(Radar.Position, LineRay.To, GridHits);
if (GridHits == null || GridHits.Count == 0)
{
continue;
}
if (GridHits.Contains(Radar.GridPosition))
{
GridHits.Remove(Radar.GridPosition);
}
float Diminish = GridHits.Count * (Radar.MyRadarGrid.Grid.GridSizeEnum == MyCubeSize.Large ? 2.5f : 0.5f) * RadarCore.RayDiminishingCoefficient;
RayPower -= Diminish;
if (RayPower <= 0)
{
return(false);
}
}
}
else
{
float Diminish = (float)(Intersect.Length * RadarCore.RayDiminishingCoefficient);
RayPower -= Diminish;
if (RayPower <= 0)
{
return(false);
}
}
}
catch (Exception Scrap)
{
RadarCore.LogError("IsInView.Iterate", Scrap, IsExcessive: true);
}
}
}
catch (Exception Scrap)
{
RadarCore.LogError("IsInView", Scrap);
}
return(false);
}