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Graphics.HGL.Draw.Picture

Portability | non-portable (requires concurrency)
Stability | provisional
Maintainer | libraries@haskell.org

Description
Drawing various shapes.
Synopsis

arc :: Point -> Point -> Angle -> Angle -> Graphic
ellipse :: Point -> Point -> Graphic
shearEllipse :: Point -> Point -> Point -> Graphic
line :: Point -> Point -> Graphic
polyline :: [Point] -> Graphic
polygon :: [Point] -> Graphic
polyBezier :: [Point] -> Graphic

Documentation
arc

:: Point | a corner of the rectangle bounding the ellipse.
-> Point | the opposite corner of the rectangle bounding the ellipse.
-> Angle | the start angle of the arc, measured counter-clockwise from the horizontal.
-> Angle | the extent of the arc, measured counter-clockwise from the start angle.
-> Graphic | a filled shape
A filled arc from an ellipse.

ellipse

:: Point | a corner of the rectangle bounding the ellipse.
-> Point | the opposite corner of the rectangle bounding the ellipse.
-> Graphic | a filled shape
A filled ellipse that fits inside a rectangle defined by two `Point`s on the window.

shearEllipse

:: Point | a corner of the bounding parallelogram.
-> Point | another corner of the parallelogram, adjacent to the first.
-> Point | another corner of the parallelogram, adjacent to the first and thus opposite to the second.
-> Graphic | a filled shape
A filled sheared ellipse that fits inside a parallelogram defined by three `Point`s on the window. This function is implemented using polygons on both Win32 and X11.

line :: Point -> Point -> Graphic
A line between two `Point`s.
polyline :: [Point] -> Graphic
A series of lines through a list of `Point`s.
polygon :: [Point] -> Graphic
A filled polygon defined by a list of `Point`s.
polyBezier :: [Point] -> Graphic
A series of (unfilled) Bezier curves defined by a list of 3n+1 control `Point`s. This function is not supported on X11 (it yields an error message and a `polyline`).
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