Graphics.Gloss.Data.Point.Arithmetic

Point and vector arithmetic

Vectors aren't numbers according to Haskell, because they don't support all numeric operations sensibly. We define component-wise addition, subtraction, and negation along with scalar multiplication in this module, which is intended to be imported qualified.

Documentation

type Point = (Float, Float)

A point on the x-y plane.

(+) :: Point -> Point -> Point infixl 6

Add two vectors, or add a vector to a point.

(-) :: Point -> Point -> Point infixl 6

Subtract two vectors, or subtract a vector from a point.

(*) :: Float -> Point -> Point infixl 7

Multiply a scalar by a vector.

negate :: Point -> Point

Negate a vector.