/// <summary>
/// Checks that these coordinates are within a certain distance without any
/// entity that matches the collision mask obstructing them.
/// If the <paramref name="range"/> is zero or negative,
/// this method will only check if nothing obstructs the two sets of coordinates..
/// </summary>
/// <param name="coords">Set of coordinates to use.</param>
/// <param name="otherCoords">Other set of coordinates to use.</param>
/// <param name="range">maximum distance between the two sets of coordinates.</param>
/// <param name="collisionMask">the mask to check for collisions</param>
/// <param name="predicate">.</param>
/// <param name="mapManager">Map manager containing the two GridIds.</param>
/// <param name="insideBlockerValid">if coordinates inside obstructions count as obstructed or not</param>
/// <returns>True if the two points are within a given range without being obstructed.</returns>
public bool InRangeUnobstructed(MapCoordinates coords, Vector2 otherCoords, float range = InteractionRange,
int collisionMask = (int)CollisionGroup.Impassable, Func <IEntity, bool> predicate = null, bool insideBlockerValid = false)
{
var dir = otherCoords - coords.Position;
if (dir.LengthSquared.Equals(0f))
{
return(true);
}
if (range > 0f && !(dir.LengthSquared <= range * range))
{
return(false);
}
var ray = new CollisionRay(coords.Position, dir.Normalized, collisionMask);
var rayResults = _physicsManager.IntersectRayWithPredicate(coords.MapId, ray, dir.Length, predicate, true);
if (!rayResults.DidHitObject || (insideBlockerValid && rayResults.DidHitObject && (rayResults.HitPos - otherCoords).Length < 1f))
{
if (_mapManager.TryFindGridAt(coords, out var mapGrid) && mapGrid != null)
{
var srcPos = mapGrid.MapToGrid(coords);
var destPos = new GridCoordinates(otherCoords, mapGrid);
if (srcPos.InRange(_mapManager, destPos, range))
{
return(true);
}
}
}
return(false);
}
/// <summary>
/// Traces a ray from coords to otherCoords and returns the length
/// of the vector between coords and the ray's first hit.
/// </summary>
/// <param name="coords">Set of coordinates to use.</param>
/// <param name="otherCoords">Other set of coordinates to use.</param>
/// <param name="collisionMask">the mask to check for collisions</param>
/// <param name="predicate">A predicate to check whether to ignore an entity or not. If it returns true, it will be ignored.</param>
/// <returns>Length of resulting ray.</returns>
public float UnobstructedRayLength(MapCoordinates coords, MapCoordinates otherCoords,
int collisionMask = (int)CollisionGroup.Impassable, Func <IEntity, bool> predicate = null)
{
var dir = otherCoords.Position - coords.Position;
if (dir.LengthSquared.Equals(0f))
{
return(0f);
}
var ray = new CollisionRay(coords.Position, dir.Normalized, collisionMask);
var rayResults = _physicsManager.IntersectRayWithPredicate(coords.MapId, ray, dir.Length, predicate, returnOnFirstHit: false).ToList();
if (rayResults.Count == 0)
{
return(dir.Length);
}
return((rayResults[0].HitPos - coords.Position).Length);
}
/// <summary>
/// Traces a ray from coords to otherCoords and returns the length
/// of the vector between coords and the ray's first hit.
/// </summary>
/// <param name="origin">Set of coordinates to use.</param>
/// <param name="other">Other set of coordinates to use.</param>
/// <param name="collisionMask">the mask to check for collisions</param>
/// <param name="predicate">
/// A predicate to check whether to ignore an entity or not.
/// If it returns true, it will be ignored.
/// </param>
/// <returns>Length of resulting ray.</returns>
public float UnobstructedDistance(
MapCoordinates origin,
MapCoordinates other,
int collisionMask = (int)CollisionGroup.Impassable,
Ignored predicate = null)
{
var dir = other.Position - origin.Position;
if (dir.LengthSquared.Equals(0f))
{
return(0f);
}
predicate ??= _ => false;
var ray = new CollisionRay(origin.Position, dir.Normalized, collisionMask);
var rayResults = _physicsManager.IntersectRayWithPredicate(origin.MapId, ray, dir.Length, predicate.Invoke, false).ToList();
if (rayResults.Count == 0)
{
return(dir.Length);
}
return((rayResults[0].HitPos - origin.Position).Length);
}
/// <summary>
/// Checks that these coordinates are within a certain distance without any
/// entity that matches the collision mask obstructing them.
/// If the <paramref name="range"/> is zero or negative,
/// this method will only check if nothing obstructs the two sets of coordinates..
/// </summary>
/// <param name="coords">Set of coordinates to use.</param>
/// <param name="otherCoords">Other set of coordinates to use.</param>
/// <param name="range">maximum distance between the two sets of coordinates.</param>
/// <param name="collisionMask">the mask to check for collisions</param>
/// <param name="predicate">.</param>
/// <param name="insideBlockerValid">if coordinates inside obstructions count as obstructed or not</param>
/// <returns>True if the two points are within a given range without being obstructed.</returns>
public bool InRangeUnobstructed(MapCoordinates coords, MapCoordinates otherCoords, float range = InteractionRange,
int collisionMask = (int)CollisionGroup.Impassable, Func <IEntity, bool> predicate = null, bool insideBlockerValid = false)
{
if (!coords.InRange(otherCoords, range))
{
return(false);
}
var dir = otherCoords.Position - coords.Position;
if (dir.LengthSquared.Equals(0f))
{
return(true);
}
if (range > 0f && !(dir.LengthSquared <= range * range))
{
return(false);
}
var ray = new CollisionRay(coords.Position, dir.Normalized, collisionMask);
var rayResults = _physicsManager.IntersectRayWithPredicate(coords.MapId, ray, dir.Length, predicate).ToList();
return(rayResults.Count == 0 || (insideBlockerValid && rayResults.Count > 0 && (rayResults[0].HitPos - otherCoords.Position).Length < 1f));
}