Graphics.PDF.Coordinates

Coordinates for a PDF document

Documentation

module Data.Complex

Geometry

Types

data Angle

Angle

Constructors

Degree !PDFFloat

Angle in degrees

Radian !PDFFloat

Angle in radians

type Point = Complex PDFFloat

data Matrix

A transformation matrix. An affine transformation a b c d e f

a b 0
c d 0
e f 1

Constructors

Matrix !PDFFloat !PDFFloat !PDFFloat !PDFFloat !PDFFloat !PDFFloat

Instances

Eq Matrix

Num Matrix

Show Matrix

Transformations

toRadian :: Angle -> PDFFloat

dot :: RealFloat t => Complex t -> Complex t -> t

Dot product of two points 'dot (x :+ y) (a :+ b) == x * a + y * b' 'dot z w == magnitude z * magnitude w * cos (phase z - phase w)'

scalePt :: RealFloat t => t -> Complex t -> Complex t

project :: RealFloat t => Complex t -> Complex t -> Complex t

projects the first point onto the second

projectX :: RealFloat t => Complex t -> Complex t

projects a point onto the x-axis

projectY :: RealFloat t => Complex t -> Complex t

projects a point onto the y-axis

pointMatrix

Arguments

:: Point

X component

-> Point

Y component

-> Point

translation component

-> Matrix

Specifies a matrix as three points

transform :: Matrix -> Point -> Point

Applies a matrix to a point

identity :: Matrix

Identity matrix

rotate

Arguments

:: Angle

Rotation angle

-> Matrix

Rotation matrix

translate :: Point -> Matrix

Translation matrix 'transform (translate z) w == z + w'

scale

Arguments

:: PDFFloat

Horizontal scaling

-> PDFFloat

Horizontal scaling

-> Matrix

Scaling matrix

spiral :: Point -> Matrix