Graphics.Craftwerk.Core.Figure

A Figure is a description of a 2D vector graphic. Affine transformations and styles apply to all subfigures. When a subfigure of a style node contains another style node the style properties will be overwritten where the deeper node specifies it.

Types and data types

type Point = (Double, Double)

type Vector = Point

type Line = [Point]

type Path = [Segment]

data Segment

Path creation

Constructors

MoveTo Point

LineSegment Point

ArcSegment Point Double Double Double

CurveSegment Point Point Point

Instances

Eq Segment

Show Segment

data Figure

The main datatype describing an arbitrary figure.

Constructors

Blank

Transform Transform Figure

Canvas Transform Figure

Composition [Figure]

Style StyleProperties Figure

Path Path

Circle Point Double

Grid Vector Double Double

Text String

NoDecorations Figure

Instances

Eq Figure

Show Figure

Monoid Figure

data Transform

Constructors

Rotate Double

Scale Vector

Translate Vector

Instances

Eq Transform

Show Transform

Primitive wrappers

blank :: Figure

canvas :: Figure -> Figure

Transforms a coordinate transformation 'Transform t f' into a canvas transformation 'Canvas t f'.

rotate :: Double -> Figure -> Figure

Applies a coordinate rotation.

scale :: Vector -> Figure -> Figure

Applies a coordinate scaling.

translate :: Vector -> Figure -> Figure

Applies a coordinate translation.

composition :: [Figure] -> Figure

Combines figures which are drawn in the order of the figures in the list.

style :: StyleProperties -> Figure -> Figure

Applies a style to the given figure

path :: Path -> Figure

Generate a figure from a path.

moveTo :: Point -> Segment

Generates a MoveTo segment

lineTo :: Point -> Segment

Generates a LineSegment segment.

arc

Arguments

:: Point

Draws a line to this point unless segment is the first element in the path.

-> Double

Start angle

-> Double

End angle

-> Double

Radius

-> Segment

Generates an ArcSegment segment.

curveTo

Arguments

:: Point

End point of the segment.

-> Point

Control point 1.

-> Point

Control point 2.

-> Segment

Generates a CurveSegment segment.

line :: Line -> Figure

Converts a line to a figure

circle :: Point -> Double -> Figure

Generate a circle figure at a point with given radius.

grid

Arguments

:: Vector

x,y

-> Vector

xs,ys

-> Figure

Generate a grid spanning from (0,0) to (x,y) taking steps (xs,ys).

text :: String -> Figure

Generate a text at (0,0)

Point generation

point :: Double -> Double -> Point

Path generation

lineToPath :: Line -> Path

rectangle

Arguments

:: Point

Origin

-> Vector

Extent

-> Line

Construct a rectangle path from origin and extent.

unitRectangle :: Line

Rectangle with origin (0,0) and extent (1,1)