Graphics.PS.Query

Path query functions and related operations.

Documentation

startPt :: Path -> Maybe (Pt Double)

Locate the starting point of the path, which must begin with a MoveTo node.

startPt' :: Path -> Maybe (Pt Double)

Variant that allows the initial node to be a LineTo or CurveTo node.

mkValid :: Path -> Path

Ensure path begins with a MoveTo node.

endPt :: Path -> Maybe (Pt Double)

Locate the end point of the path.

close :: Path -> Path

Append a LineTo the start point of Path.

approx :: Double -> Path -> Path

Approximate curves as n straight line segments. That is replace CurveTo nodes with n LineTo nodes calculated using bezier4.

data Rect a

Rectangle, given as lower left and upper right points.

Constructors

Rect

Fields

• rect_ll :: Pt a
• rect_ur :: Pt a

Instances

Eq a => Eq (Rect a)

Methods

(==) :: Rect a -> Rect a -> Bool

(/=) :: Rect a -> Rect a -> Bool

Show a => Show (Rect a)

Methods

showsPrec :: Int -> Rect a -> ShowS

show :: Rect a -> String

showList :: [Rect a] -> ShowS

rect_sum :: Ord a => Rect a -> Rect a -> Rect a

Sum (join) of two Rect.

path_rect :: Path -> Rect Double

Rectangle bounding a (simple) Path.

rect_to_bbox :: RealFrac a => Rect a -> BBox

Translate Rect to BBox.

path_to_bbox :: Path -> BBox