Rendering: Add connections between entities

[LogicAndTrick]

Draw lines between triggers and their target entities.

[TeamSpen210]

This is somewhat of a subset of the line() "behavior" in Source FGDs, since it can be configured to produce this functionallity. It'd make sense to then just synthesize the definition in GoldSource FGDs.

[LogicAndTrick]

Interesting, I didn't know Source had behaviours for that, but it makes sense. It might just be a matter of automatically adding a line behaviour any class that has both targetname and target keys.

[TeamSpen210]

The syntax is pretty customisable, it goes like line(255 255 255, targetname, target). It'll read the target keyvalue on this entity and draw a line to the first entity with the matching targetname (or whatever keyvalues you specify)? You can also add a second pair to specify the other end of the line, so it goes between two entities instead of to the current one. (Useful for say env_beam.)