Safe Haskell	None

Graphics.Gloss.Accelerate.Data.Point

Contents

Point data type
Point creation
Testing points

Synopsis

Point data type

type Point = XY Float Source

An abstract point value on the xy-plane.

Point creation

makePoint Source

Arguments

:: Exp Float	x-coordinate
-> Exp Float	y-coordinate
-> Exp Point

Make a custom point

xyOfPoint :: Exp Point -> (Exp Float, Exp Float)Source

Take the components of a point

pointOfIndex Source

Arguments

:: Int	width
-> Int	height
-> Exp DIM2
-> Exp Point

Convert a two-dimensional index into a point centered in a plane of the given width and height.

Testing points

pointInBox Source

Arguments

:: Exp Point	point to test
-> Exp Point	corner of box
-> Exp Point	opposite corner of box
-> Exp Bool

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