The Ygdrasil User's Guide

userTrigger

The userTrigger responds to a user entering or leaving a space. userTriggers can be spherical or box-shaped, and are usually invisible. You can use the userTrigger to make a light turn on when you walk into a room, make a sound play when you walk out of it, or tell an object to start animating when you walk near it.


A user, a userTrigger, and a light.


When the user enters the radius around the trigger,
it sends a message to the light.

Node Reference

Derived from: ygSpace

Messages

Message	Parameters	Default	Description
volume	string volumeShape, float coordinates ... sphere x y z radius box x1 y1 z1 x2 y2 z2 cylinder x1 y1 z1 x2 y2 z2 radius point x y z infinite	infinite	defines the shape of the trigger's active area. the volumeShape can be one of the following: infinite: the trigger is active throughout the world sphere: x y z is the location of the trigger; radius is the radius of the sphere. box: x1 y1 z1 and x2 y2 z2 define two opposite corners of a box cylinder: x1 y1 z1 and x2 y2 z2 are centers of the ends of the cylinder; radius is the radius of the cylinder. point: x y z is the location of the trigger.

Events

Event	Variables	Description
enter	$user	a user has entered the space
exit	$user	a user has left the space
firstenter	$user	a user has entered the space
empty		all users have left the space

(c) Ben Chang