Gate

Boolean logic — AND, OR, NOT, XOR — on two inputs, or up to eight.

Output: boolean

Inputs

Handle	Type	Meaning
a	boolean	first condition
b	boolean	second condition (ignored by not)
c … h	boolean	extra conditions, added with + input (since 1.27)

Unwired a and b use the card values.

More than two inputs

Since 1.27 Gate takes up to eight inputs, named a to h. Press + input on the card to add a socket, and − on a row to remove that socket.

op	With more than two inputs
and	true when all wired inputs are true
or	true when any wired input is true
xor	true when an odd number of wired inputs are true

The extra inputs c to h have no value of their own: an input with no wire is skipped. Removing a socket moves the wires after it down one name (removing b turns c into b), one Ctrl+Z puts it all back, and groups around the node update their sockets too. Compare stays two-input.

Parameters

Parameter	Default	Options
op	and	and, or, not, xor

Practical example

A door that opens only when both pressure plates are occupied:

1. Set up two Proximity nodes, one per plate (each fed by two Object Selectors).
2. Add a Gate (op and); wire the Proximities into a and b.
3. Wire Gate → a Visibility node's on input, then Visibility → an Object Selector targeting the door barrier — the barrier shows only while both plates are active. Flip the Gate to or for either-plate behavior.

Tip

not is a simple inverter: it looks only at a and ignores b entirely — handy right before a Visibility to turn "near" into "hide".