public static float distanceToObject(this Vector2 position, GameObject obj)
{
Vector2 center = obj.getCollectiveColliderCenter();
Vector2 dir = (center - position).normalized;
RaycastAnswer answer = Utility.RaycastAll(position, dir, (center - position).magnitude);
for (int i = 0; i < answer.count; i++)
{
RaycastHit2D rch2d = answer.rch2ds[i];
if (rch2d.collider.gameObject == obj)
{
return(rch2d.distance);
}
}
throw new UnityException("Object " + obj + "'s raycast not found! This should not be possible!");
}
/// <summary>
/// Determines whether the center of the first object has a direct line of sight to the center of the second object
/// </summary>
/// <param name="first"></param>
/// <param name="second"></param>
/// <returns></returns>
public static bool lineOfSight(this GameObject first, GameObject second)
{
Vector2 pos1 = first.transform.position;
Vector2 pos2 = second.transform.position;
RaycastAnswer answer = Utility.RaycastAll(pos1, pos2 - pos1, Vector2.Distance(pos1, pos2));
for (int i = 0; i < answer.count; i++)
{
RaycastHit2D rch2d = answer.rch2ds[i];
if (rch2d.collider.gameObject != first && rch2d.collider.gameObject != second)
{
return(false);
}
}
return(true);
}
/// <summary>
/// Returns true if the two colliders overlap
/// </summary>
/// <param name=""></param>
/// <param name="other"></param>
/// <returns></returns>
public static bool OverlapsCollider(this Collider2D coll, Collider2D other)
{
//If the bounds don't overlap
if (!coll.bounds.Intersects(other.bounds))
{
//then these colliders definitely don't overlap
return(false);
}
//Cast the first one to find if it has it
RaycastAnswer answer = coll.CastAnswer(Vector2.zero, 0, false);
for (int i = 0; i < answer.count; i++)
{
if (answer.rch2ds[i].collider == other)
{
return(true);
}
}
return(false);
}
/// <summary>
/// Determines whether the center of the first object has a direct line of sight to the center of the second object
/// </summary>
/// <param name="first"></param>
/// <param name="second"></param>
/// <returns></returns>
public static bool lineOfSight(this GameObject first, GameObject second)
{
Vector2 pos1 = first.transform.position;
Vector2 pos2 = second.transform.position;
RaycastAnswer answer = Utility.RaycastAll(pos1, pos2 - pos1, Vector2.Distance(pos1, pos2));
for (int i = 0; i < answer.count; i++)
{
RaycastHit2D rch2d = answer.rch2ds[i];
if (rch2d.collider.isTrigger)
{
//don't process triggers
continue;
}
GameObject collGO = rch2d.collider.gameObject;
if (!collGO.equalsHierarchy(first) && !collGO.equalsHierarchy(second))
{
return(false);
}
}
return(true);
}
