Copyright	[2013..2020] Trevor L. McDonell
License	BSD3
Maintainer	Trevor L. McDonell <trevor.mcdonell@gmail.com>
Stability	experimental
Portability	non-portable (GHC extensions)
Safe Haskell	None
Language	Haskell2010

Graphics.Gloss.Accelerate.Data.Point

Contents

Point data type
Point creation
Testing points

Description

Synopsis

type Point = V2 Float
makePoint :: Exp Float -> Exp Float -> Exp Point
xyOfPoint :: Exp Point -> (Exp Float, Exp Float)
pointOfIndex :: Int -> Int -> Exp DIM2 -> Exp Point
pointInBox :: Exp Point -> Exp Point -> Exp Point -> Exp Bool

Point data type

type Point = V2 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