How to trigger something when looked at

I know (or think I know) that I read how to trigger something when the player looked at a particular entity, but danged if I can find it now. This is for single player, and I want to make sure something doesn't start until the player actually turns to look at an entity. Anyone know what the entity is?

Trigger_look, I believe, though I haven't tried to use it.

i once knew a girl who could make you erect with just a look.

/runs

You're right rof, I was thinking it was a point-based entity for some reason, and hadn't looked in the brush-based entities. It's official, I'm a careless idiot.

Thanks.

Orpheus, would that be a trigger_erect_look?

Chuckle