Point package:gloss

type Point = (Float, Float)
gloss Graphics.Gloss.Data.Picture Graphics.Gloss.Data.Point Graphics.Gloss.Data.Point.Arithmetic
A point on the x-y plane.
module Graphics.Gloss.Data.Point
gloss
pointInBox :: Point -> Point -> Point -> Bool
gloss Graphics.Gloss.Data.Point
Test whether a point lies within a rectangular box that is oriented on the x-y plane. The points P1-P2 are opposing points of the box, but need not be in a particular order. 
P2 +-------+
|       |
| + P0  |
|       |
+-------+ P1
closestPointOnLine :: Point -> Point -> Point -> Point
gloss Graphics.Gloss.Geometry.Line
Given an infinite line which intersects P1 and P1, return the point on that line that is closest to P3
closestPointOnLineParam :: Point -> Point -> Point -> Float
gloss Graphics.Gloss.Geometry.Line
Given an infinite line which intersects P1 and P2, let P4 be the point on the line that is closest to P3. Return an indication of where on the line P4 is relative to P1 and P2. 
if P4 == P1 then 0
if P4 == P2 then 1
if P4 is halfway between P1 and P2 then 0.5

|
P1
|
P4 +---- P3
|
P2
|