Selector: Block Presence

Selector: Block Presence is a Number Spell Piece added by Psi. It will analyze the composition of a block at a given position. The possible values it can return are:
* 0: No block or a replaceable block exists at that position.
* 1: A non-solid block exists at that position.
* 2: A solid block exists at that position.
It is unlocked in the lesson "Detection & Focus."
== Parameters ==
* Position: Requires a vector.
== See also ==
* 
Category:PsiCategory:Spell Pieces