chickadee » vectr » horizontal?

pointing-up? v <vectr>procedure
pointing-down? v <vectr>procedure
pointing-left? v <vectr>procedure
pointing-right? v <vectr>procedure
horizontal? v <vectr>procedure
vertical? v <vectr>procedure

Procedures returning booleans based on the "direction" of v as if it were to be drawn moving from its head to its tail on a standard Cartesian coordinate graph where positive x grows to the left and positive y grows up.