int event.tx, event.ty; int event.zone; int event.entity; int event.param;
event.tx, event.ty - Triggering tile coordinates of this event, if applicable.
event.zone - Triggering zone of an event.
event.entity - Refers to the entity who triggered the event as well as the entity being rendered when hooking an entity render.
event.param - Parameter meant to be defined in maped next to the entity or zone's script name. currently unimplemented in the editor.