While using the existing (3D) sphere collider will work in a 2D game (it did for me at least) - just for cleanliness sake and to help me understand what was going on… adding the below methods to PlayerController.cs will do the job in 2D land.
Just add a call to InteractWithComponent2D() in the Update method on PlayerController.cs.
private bool InteractWithComponent2D()
{
RaycastHit2D[] hits = RaycastAllSorted2D();
foreach (RaycastHit2D hit in hits)
{
IRaycastable[] raycastables = hit.transform.GetComponents<IRaycastable>();
foreach (IRaycastable raycastable in raycastables)
{
if (raycastable.HandleRaycast(this))
{
SetCursor(raycastable.GetCursorType());
return true;
}
}
}
return false;
}
RaycastHit2D[] RaycastAllSorted2D()
{
var hits = Physics2D.CircleCastAll(GetMouseRay2D(), raycastRadius, Vector2.zero);
float[] distances = new float[hits.Length];
for (int i = 0; i < hits.Length; i++)
{
distances[i] = hits[i].distance;
}
Array.Sort(distances, hits);
return hits;
}
private static Vector2 GetMouseRay2D()
{
return Camera.main.ScreenToWorldPoint(Input.mousePosition);
}
I created an ‘Armour’ pickup with a Circle Collider 2D (mind the pixels!):
