Copyright  (c) 2011 diagramslib team (see LICENSE) 

License  BSDstyle (see LICENSE) 
Maintainer  diagramsdiscuss@googlegroups.com 
Safe Haskell  None 
Language  Haskell2010 
Paths in two dimensions are special since we may stroke them to create a 2D diagram, and (eventually) perform operations such as intersection and union. They also have a trace, whereas paths in higher dimensions do not.
 stroke :: (InSpace V2 n t, ToPath t, TypeableFloat n, Renderable (Path V2 n) b) => t > QDiagram b V2 n Any
 stroke' :: (InSpace V2 n t, ToPath t, TypeableFloat n, Renderable (Path V2 n) b, IsName a) => StrokeOpts a > t > QDiagram b V2 n Any
 strokePath :: (TypeableFloat n, Renderable (Path V2 n) b) => Path V2 n > QDiagram b V2 n Any
 strokeP :: (TypeableFloat n, Renderable (Path V2 n) b) => Path V2 n > QDiagram b V2 n Any
 strokePath' :: (TypeableFloat n, Renderable (Path V2 n) b, IsName a) => StrokeOpts a > Path V2 n > QDiagram b V2 n Any
 strokeP' :: (TypeableFloat n, Renderable (Path V2 n) b, IsName a) => StrokeOpts a > Path V2 n > QDiagram b V2 n Any
 strokeTrail :: (TypeableFloat n, Renderable (Path V2 n) b) => Trail V2 n > QDiagram b V2 n Any
 strokeT :: (TypeableFloat n, Renderable (Path V2 n) b) => Trail V2 n > QDiagram b V2 n Any
 strokeTrail' :: (TypeableFloat n, Renderable (Path V2 n) b, IsName a) => StrokeOpts a > Trail V2 n > QDiagram b V2 n Any
 strokeT' :: (TypeableFloat n, Renderable (Path V2 n) b, IsName a) => StrokeOpts a > Trail V2 n > QDiagram b V2 n Any
 strokeLine :: (TypeableFloat n, Renderable (Path V2 n) b) => Trail' Line V2 n > QDiagram b V2 n Any
 strokeLoop :: (TypeableFloat n, Renderable (Path V2 n) b) => Trail' Loop V2 n > QDiagram b V2 n Any
 strokeLocTrail :: (TypeableFloat n, Renderable (Path V2 n) b) => Located (Trail V2 n) > QDiagram b V2 n Any
 strokeLocT :: (TypeableFloat n, Renderable (Path V2 n) b) => Located (Trail V2 n) > QDiagram b V2 n Any
 strokeLocLine :: (TypeableFloat n, Renderable (Path V2 n) b) => Located (Trail' Line V2 n) > QDiagram b V2 n Any
 strokeLocLoop :: (TypeableFloat n, Renderable (Path V2 n) b) => Located (Trail' Loop V2 n) > QDiagram b V2 n Any
 data FillRule
 getFillRule :: FillRule > FillRule
 fillRule :: HasStyle a => FillRule > a > a
 _fillRule :: Lens' (Style V2 n) FillRule
 data StrokeOpts a = StrokeOpts {
 _vertexNames :: [[a]]
 _queryFillRule :: FillRule
 vertexNames :: forall a a'. Lens (StrokeOpts a) (StrokeOpts a') [[a]] [[a']]
 queryFillRule :: forall a. Lens' (StrokeOpts a) FillRule
 isInsideWinding :: RealFloat n => Point V2 n > Path V2 n > Bool
 isInsideEvenOdd :: RealFloat n => Point V2 n > Path V2 n > Bool
 newtype Clip n = Clip [Path V2 n]
 _Clip :: Iso (Clip n) (Clip n') [Path V2 n] [Path V2 n']
 _clip :: (Typeable n, OrderedField n) => Lens' (Style V2 n) [Path V2 n]
 clipBy :: (HasStyle a, V a ~ V2, N a ~ n, TypeableFloat n) => Path V2 n > a > a
 clipTo :: (TypeableFloat n, Renderable (Path V2 n) b) => Path V2 n > QDiagram b V2 n Any > QDiagram b V2 n Any
 clipped :: (TypeableFloat n, Renderable (Path V2 n) b) => Path V2 n > QDiagram b V2 n Any > QDiagram b V2 n Any
 intersectPoints :: (InSpace V2 n t, SameSpace t s, ToPath t, ToPath s, OrderedField n) => t > s > [P2 n]
 intersectPoints' :: (InSpace V2 n t, SameSpace t s, ToPath t, ToPath s, OrderedField n) => n > t > s > [P2 n]
 intersectPointsP :: OrderedField n => Path V2 n > Path V2 n > [P2 n]
 intersectPointsP' :: OrderedField n => n > Path V2 n > Path V2 n > [P2 n]
 intersectPointsT :: OrderedField n => Located (Trail V2 n) > Located (Trail V2 n) > [P2 n]
 intersectPointsT' :: OrderedField n => n > Located (Trail V2 n) > Located (Trail V2 n) > [P2 n]
Constructing pathbased diagrams
stroke :: (InSpace V2 n t, ToPath t, TypeableFloat n, Renderable (Path V2 n) b) => t > QDiagram b V2 n Any Source
stroke' :: (InSpace V2 n t, ToPath t, TypeableFloat n, Renderable (Path V2 n) b, IsName a) => StrokeOpts a > t > QDiagram b V2 n Any Source
A variant of stroke
that takes an extra record of options to
customize its behaviour. In particular:
 Names can be assigned to the path's vertices
StrokeOpts
is an instance of Default
, so stroke' (
syntax may be used.with
&
... )
strokePath :: (TypeableFloat n, Renderable (Path V2 n) b) => Path V2 n > QDiagram b V2 n Any Source
strokePath' :: (TypeableFloat n, Renderable (Path V2 n) b, IsName a) => StrokeOpts a > Path V2 n > QDiagram b V2 n Any Source
strokeP' :: (TypeableFloat n, Renderable (Path V2 n) b, IsName a) => StrokeOpts a > Path V2 n > QDiagram b V2 n Any Source
strokeTrail :: (TypeableFloat n, Renderable (Path V2 n) b) => Trail V2 n > QDiagram b V2 n Any Source
strokeTrail' :: (TypeableFloat n, Renderable (Path V2 n) b, IsName a) => StrokeOpts a > Trail V2 n > QDiagram b V2 n Any Source
A composition of stroke'
and pathFromTrail
for conveniently
converting a trail directly into a diagram.
strokeT' :: (TypeableFloat n, Renderable (Path V2 n) b, IsName a) => StrokeOpts a > Trail V2 n > QDiagram b V2 n Any Source
Deprecated synonym for strokeTrail'
.
strokeLine :: (TypeableFloat n, Renderable (Path V2 n) b) => Trail' Line V2 n > QDiagram b V2 n Any Source
strokeLoop :: (TypeableFloat n, Renderable (Path V2 n) b) => Trail' Loop V2 n > QDiagram b V2 n Any Source
strokeLocTrail :: (TypeableFloat n, Renderable (Path V2 n) b) => Located (Trail V2 n) > QDiagram b V2 n Any Source
A convenience function for converting a Located Trail
directly
into a diagram; strokeLocTrail = stroke . trailLike
.
strokeLocT :: (TypeableFloat n, Renderable (Path V2 n) b) => Located (Trail V2 n) > QDiagram b V2 n Any Source
Deprecated synonym for strokeLocTrail
.
strokeLocLine :: (TypeableFloat n, Renderable (Path V2 n) b) => Located (Trail' Line V2 n) > QDiagram b V2 n Any Source
A convenience function for converting a Located
line directly
into a diagram; strokeLocLine = stroke . trailLike . mapLoc wrapLine
.
strokeLocLoop :: (TypeableFloat n, Renderable (Path V2 n) b) => Located (Trail' Loop V2 n) > QDiagram b V2 n Any Source
A convenience function for converting a Located
loop directly
into a diagram; strokeLocLoop = stroke . trailLike . mapLoc wrapLoop
.
Stroke options
Enumeration of algorithms or "rules" for determining which points lie in the interior of a (possibly selfintersecting) path.
Winding  Interior points are those with a nonzero winding number. See http://en.wikipedia.org/wiki/Nonzerorule. 
EvenOdd  Interior points are those where a ray extended infinitely in a particular direction crosses the path an odd number of times. See http://en.wikipedia.org/wiki/Evenodd_rule. 
getFillRule :: FillRule > FillRule Source
Extract the fill rule from a FillRuleA
attribute.
fillRule :: HasStyle a => FillRule > a > a Source
Specify the fill rule that should be used for determining which points are inside a path.
data StrokeOpts a Source
A record of options that control how a path is stroked.
StrokeOpts
is an instance of Default
, so a StrokeOpts
records can be created using
notation.with
{ ... }
StrokeOpts  

Default (StrokeOpts a) Source 
vertexNames :: forall a a'. Lens (StrokeOpts a) (StrokeOpts a') [[a]] [[a']] Source
Atomic names that should be assigned to the vertices of the path so that they can be referenced later. If there are not enough names, the extra vertices are not assigned names; if there are too many, the extra names are ignored. Note that this is a list of lists of names, since paths can consist of multiple trails. The first list of names are assigned to the vertices of the first trail, the second list to the second trail, and so on.
The default value is the empty list.
queryFillRule :: forall a. Lens' (StrokeOpts a) FillRule Source
Inside/outside testing
isInsideWinding :: RealFloat n => Point V2 n > Path V2 n > Bool Source
Test whether the given point is inside the given path,
by testing whether the point's winding number is nonzero. Note
that False
is always returned for paths consisting of lines
(as opposed to loops), regardless of the winding number.
isInsideEvenOdd :: RealFloat n => Point V2 n > Path V2 n > Bool Source
Test whether the given point is inside the given path,
by testing whether a ray extending from the point in the positive
x direction crosses the path an even (outside) or odd (inside)
number of times. Note that False
is always returned for
paths consisting of lines (as opposed to loops), regardless of
the number of crossings.
Clipping
Clip
tracks the accumulated clipping paths applied to a
diagram. Note that the semigroup structure on Clip
is list
concatenation, so applying multiple clipping paths is sensible.
The clipping region is the intersection of all the applied
clipping paths.
Semigroup (Clip n) Source  
Typeable * n => AttributeClass (Clip n) Source  
OrderedField n => Transformable (Clip n) Source  
AsEmpty (Clip n) Source  
Wrapped (Clip n) Source  
(~) * (Clip n1) t0 => Rewrapped (Clip n) t Source  
type V (Clip n) = V2 Source  
type N (Clip n) = n Source  
type Unwrapped (Clip n0) = [Path V2 n0] Source 
_clip :: (Typeable n, OrderedField n) => Lens' (Style V2 n) [Path V2 n] Source
Lens onto the Clip in a style. An empty list means no clipping.
clipBy :: (HasStyle a, V a ~ V2, N a ~ n, TypeableFloat n) => Path V2 n > a > a Source
Clip a diagram by the given path:
 Only the parts of the diagram which lie in the interior of the path will be drawn.
 The envelope of the diagram is unaffected.
clipTo :: (TypeableFloat n, Renderable (Path V2 n) b) => Path V2 n > QDiagram b V2 n Any > QDiagram b V2 n Any Source
Clip a diagram to the given path setting its envelope to the pointwise minimum of the envelopes of the diagram and path. The trace consists of those parts of the original diagram's trace which fall within the clipping path, or parts of the path's trace within the original diagram.
clipped :: (TypeableFloat n, Renderable (Path V2 n) b) => Path V2 n > QDiagram b V2 n Any > QDiagram b V2 n Any Source
Clip a diagram to the clip path taking the envelope and trace of the clip path.
Intersections
intersectPoints :: (InSpace V2 n t, SameSpace t s, ToPath t, ToPath s, OrderedField n) => t > s > [P2 n] Source
Find the intersect points of two objects that can be converted to a path.
intersectPoints' :: (InSpace V2 n t, SameSpace t s, ToPath t, ToPath s, OrderedField n) => n > t > s > [P2 n] Source
Find the intersect points of two objects that can be converted to a path within the given tolerance.
intersectPointsP :: OrderedField n => Path V2 n > Path V2 n > [P2 n] Source
Compute the intersect points between two paths.
intersectPointsP' :: OrderedField n => n > Path V2 n > Path V2 n > [P2 n] Source
Compute the intersect points between two paths within given tolerance.
intersectPointsT :: OrderedField n => Located (Trail V2 n) > Located (Trail V2 n) > [P2 n] Source
Compute the intersect points between two located trails.
intersectPointsT' :: OrderedField n => n > Located (Trail V2 n) > Located (Trail V2 n) > [P2 n] Source
Compute the intersect points between two located trails within the given tolerance.