Agnazzar's Scorcher, a spell from the Forgotten Realms Campaign Setting, reads as follows:
A jet of roaring flame bursts from your outstretched hand, scorching any creature in a 5-foot-wide path to the edge of the spell's range. Aganazzar's scorcher deals 1d8 points of damage per two caster levels, to a maximum of 5d8 points of damage.
I'm wondering - what are the rules regarding path spells? Does the path have to be a straight line? Is there any rule text on paths?