Data.PlanarGraph

Data type for representing connected planar graphs

Documentation

>>> :{
let dart i s = Dart (Arc i) (read s)
    (aA:aB:aC:aD:aE:aG:_) = take 6 [Arc 0..]
    myGraph :: PlanarGraph () Primal () String ()
    myGraph = planarGraph [ [ (Dart aA Negative, "a-")
                            , (Dart aC Positive, "c+")
                            , (Dart aB Positive, "b+")
                            , (Dart aA Positive, "a+")
                            ]
                          , [ (Dart aE Negative, "e-")
                            , (Dart aB Negative, "b-")
                            , (Dart aD Negative, "d-")
                            , (Dart aG Positive, "g+")
                            ]
                          , [ (Dart aE Positive, "e+")
                            , (Dart aD Positive, "d+")
                            , (Dart aC Negative, "c-")
                            ]
                          , [ (Dart aG Negative, "g-")
                            ]
                          ]
:}

This represents the following graph. Note that the graph is undirected, the arrows are just to indicate what the Positive direction of the darts is.

data PlanarGraph s (w :: World) v e f

A *connected* Planar graph with bidirected edges. I.e. the edges (darts) are directed, however, for every directed edge, the edge in the oposite direction is also in the graph.

The types v, e, and f are the are the types of the data associated with the vertices, edges, and faces, respectively.

The orbits in the embedding are assumed to be in counterclockwise order. Therefore, every dart directly bounds the face to its right.

Instances

(Eq v, Eq e, Eq f) => Eq (PlanarGraph s w v e f)

Defined in Data.PlanarGraph.Core

Methods

(==) :: PlanarGraph s w v e f -> PlanarGraph s w v e f -> Bool

(/=) :: PlanarGraph s w v e f -> PlanarGraph s w v e f -> Bool

(Show v, Show e, Show f) => Show (PlanarGraph s w v e f)

Defined in Data.PlanarGraph.Core

Methods

showsPrec :: Int -> PlanarGraph s w v e f -> ShowS

show :: PlanarGraph s w v e f -> String

showList :: [PlanarGraph s w v e f] -> ShowS

Generic (PlanarGraph s w v e f)

Defined in Data.PlanarGraph.Core

Associated Types

type Rep (PlanarGraph s w v e f) :: Type -> Type

Methods

from :: PlanarGraph s w v e f -> Rep (PlanarGraph s w v e f) x

to :: Rep (PlanarGraph s w v e f) x -> PlanarGraph s w v e f

(ToJSON v, ToJSON e, ToJSON f) => ToJSON (PlanarGraph s w v e f)

Defined in Data.PlanarGraph.IO

Methods

toJSON :: PlanarGraph s w v e f -> Value

toEncoding :: PlanarGraph s w v e f -> Encoding

toJSONList :: [PlanarGraph s w v e f] -> Value

toEncodingList :: [PlanarGraph s w v e f] -> Encoding

(FromJSON v, FromJSON e, FromJSON f) => FromJSON (PlanarGraph s Primal v e f)

Defined in Data.PlanarGraph.IO

Methods

parseJSON :: Value -> Parser (PlanarGraph s Primal v e f)

parseJSONList :: Value -> Parser [PlanarGraph s Primal v e f]

HasDataOf (PlanarGraph s w v e f) (Dart s)

Defined in Data.PlanarGraph.Core

Associated Types

type DataOf (PlanarGraph s w v e f) (Dart s) :: Type

Methods

dataOf :: Dart s -> Lens' (PlanarGraph s w v e f) (DataOf (PlanarGraph s w v e f) (Dart s))

HasDataOf (PlanarGraph s w v e f) (FaceId s w)

Defined in Data.PlanarGraph.Core

Associated Types

type DataOf (PlanarGraph s w v e f) (FaceId s w) :: Type

Methods

dataOf :: FaceId s w -> Lens' (PlanarGraph s w v e f) (DataOf (PlanarGraph s w v e f) (FaceId s w))

HasDataOf (PlanarGraph s w v e f) (VertexId s w)

Defined in Data.PlanarGraph.Core

Associated Types

type DataOf (PlanarGraph s w v e f) (VertexId s w) :: Type

Methods

dataOf :: VertexId s w -> Lens' (PlanarGraph s w v e f) (DataOf (PlanarGraph s w v e f) (VertexId s w))

type Rep (PlanarGraph s w v e f)

Defined in Data.PlanarGraph.Core

type Rep (PlanarGraph s w v e f) = D1 (MetaData "PlanarGraph" "Data.PlanarGraph.Core" "hgeometry-combinatorial-0.10.0.0-KBhA9TX8xzkAsPm57THGXk" False) (C1 (MetaCons "PlanarGraph" PrefixI True) ((S1 (MetaSel (Just "_embedding") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 (Permutation (Dart s))) :*: S1 (MetaSel (Just "_vertexData") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 (Vector v))) :*: (S1 (MetaSel (Just "_rawDartData") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 (Vector e)) :*: (S1 (MetaSel (Just "_faceData") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 (Vector f)) :*: S1 (MetaSel (Just "_dual") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 (PlanarGraph s (DualOf w) f e v))))))

type DataOf (PlanarGraph s w v e f) (Dart s)

Defined in Data.PlanarGraph.Core

type DataOf (PlanarGraph s w v e f) (Dart s) = e

type DataOf (PlanarGraph s w v e f) (FaceId s w)

Defined in Data.PlanarGraph.Core

type DataOf (PlanarGraph s w v e f) (FaceId s w) = f

type DataOf (PlanarGraph s w v e f) (VertexId s w)

Defined in Data.PlanarGraph.Core

type DataOf (PlanarGraph s w v e f) (VertexId s w) = v

embedding :: Getter (PlanarGraph s w v e f) (Permutation (Dart s))

Get the embedding, reprsented as a permutation of the darts, of this graph.

vertexData :: Lens (PlanarGraph s w v e f) (PlanarGraph s w v' e f) (Vector v) (Vector v')

dartData :: Lens (PlanarGraph s w v e f) (PlanarGraph s w v e' f) (Vector (Dart s, e)) (Vector (Dart s, e'))

lens to access the Dart Data

faceData :: Lens (PlanarGraph s w v e f) (PlanarGraph s w v e f') (Vector f) (Vector f')

rawDartData :: Lens (PlanarGraph s w v e f) (PlanarGraph s w v e' f) (Vector e) (Vector e')

edgeData :: Lens (PlanarGraph s w v e f) (PlanarGraph s w v e' f) (Vector (Dart s, e)) (Vector (Dart s, e'))

edgeData is just an alias for dartData

data World

The world in which the graph lives

Constructors

Primal

Dual

Instances

Eq World

Defined in Data.PlanarGraph.Core

Methods

(==) :: World -> World -> Bool

(/=) :: World -> World -> Bool

Show World

Defined in Data.PlanarGraph.Core

Methods

showsPrec :: Int -> World -> ShowS

show :: World -> String

showList :: [World] -> ShowS

type family DualOf (sp :: World) where ...

We can take the dual of a world. For the Primal this gives us the Dual, for the Dual this gives us the Primal.

Equations

DualOf Primal = Dual

DualOf Dual = Primal

Representing edges: Arcs and Darts

newtype Arc s

An Arc is a directed edge in a planar graph. The type s is used to tie this arc to a particular graph.

Constructors

Arc

Fields

• _unArc :: Int

Instances

Bounded (Arc s)

Defined in Data.PlanarGraph.Dart

Methods

minBound :: Arc s

maxBound :: Arc s

Enum (Arc s)

Defined in Data.PlanarGraph.Dart

Methods

succ :: Arc s -> Arc s

pred :: Arc s -> Arc s

toEnum :: Int -> Arc s

fromEnum :: Arc s -> Int

enumFrom :: Arc s -> [Arc s]

enumFromThen :: Arc s -> Arc s -> [Arc s]

enumFromTo :: Arc s -> Arc s -> [Arc s]

enumFromThenTo :: Arc s -> Arc s -> Arc s -> [Arc s]

Eq (Arc s)

Defined in Data.PlanarGraph.Dart

Methods

(==) :: Arc s -> Arc s -> Bool

(/=) :: Arc s -> Arc s -> Bool

Ord (Arc s)

Defined in Data.PlanarGraph.Dart

Methods

compare :: Arc s -> Arc s -> Ordering

(<) :: Arc s -> Arc s -> Bool

(<=) :: Arc s -> Arc s -> Bool

(>) :: Arc s -> Arc s -> Bool

(>=) :: Arc s -> Arc s -> Bool

max :: Arc s -> Arc s -> Arc s

min :: Arc s -> Arc s -> Arc s

Show (Arc s)

Defined in Data.PlanarGraph.Dart

Methods

showsPrec :: Int -> Arc s -> ShowS

show :: Arc s -> String

showList :: [Arc s] -> ShowS

Generic (Arc s)

Defined in Data.PlanarGraph.Dart

Associated Types

type Rep (Arc s) :: Type -> Type

Methods

from :: Arc s -> Rep (Arc s) x

to :: Rep (Arc s) x -> Arc s

Arbitrary (Arc s)

Defined in Data.PlanarGraph.Dart

Methods

arbitrary :: Gen (Arc s)

shrink :: Arc s -> [Arc s]

NFData (Arc s)

Defined in Data.PlanarGraph.Dart

Methods

rnf :: Arc s -> ()

type Rep (Arc s)

Defined in Data.PlanarGraph.Dart

type Rep (Arc s) = D1 (MetaData "Arc" "Data.PlanarGraph.Dart" "hgeometry-combinatorial-0.10.0.0-KBhA9TX8xzkAsPm57THGXk" True) (C1 (MetaCons "Arc" PrefixI True) (S1 (MetaSel (Just "_unArc") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 Int)))

data Direction

Darts have a direction which is either Positive or Negative (shown as +1 or -1, respectively).

Constructors

Negative

Positive

Instances

Bounded Direction

Defined in Data.PlanarGraph.Dart

Methods

minBound :: Direction

maxBound :: Direction

Enum Direction

Defined in Data.PlanarGraph.Dart

Methods

succ :: Direction -> Direction

pred :: Direction -> Direction

toEnum :: Int -> Direction

fromEnum :: Direction -> Int

enumFrom :: Direction -> [Direction]

enumFromThen :: Direction -> Direction -> [Direction]

enumFromTo :: Direction -> Direction -> [Direction]

enumFromThenTo :: Direction -> Direction -> Direction -> [Direction]

Eq Direction

Defined in Data.PlanarGraph.Dart

Methods

(==) :: Direction -> Direction -> Bool

(/=) :: Direction -> Direction -> Bool

Ord Direction

Defined in Data.PlanarGraph.Dart

Methods

compare :: Direction -> Direction -> Ordering

(<) :: Direction -> Direction -> Bool

(<=) :: Direction -> Direction -> Bool

(>) :: Direction -> Direction -> Bool

(>=) :: Direction -> Direction -> Bool

max :: Direction -> Direction -> Direction

min :: Direction -> Direction -> Direction

Read Direction

Defined in Data.PlanarGraph.Dart

Methods

readsPrec :: Int -> ReadS Direction

readList :: ReadS [Direction]

readPrec :: ReadPrec Direction

readListPrec :: ReadPrec [Direction]

Show Direction

Defined in Data.PlanarGraph.Dart

Methods

showsPrec :: Int -> Direction -> ShowS

show :: Direction -> String

showList :: [Direction] -> ShowS

Generic Direction

Defined in Data.PlanarGraph.Dart

Associated Types

type Rep Direction :: Type -> Type

Methods

from :: Direction -> Rep Direction x

to :: Rep Direction x -> Direction

Arbitrary Direction

Defined in Data.PlanarGraph.Dart

Methods

arbitrary :: Gen Direction

shrink :: Direction -> [Direction]

NFData Direction

Defined in Data.PlanarGraph.Dart

Methods

rnf :: Direction -> ()

type Rep Direction

Defined in Data.PlanarGraph.Dart

type Rep Direction = D1 (MetaData "Direction" "Data.PlanarGraph.Dart" "hgeometry-combinatorial-0.10.0.0-KBhA9TX8xzkAsPm57THGXk" False) (C1 (MetaCons "Negative" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "Positive" PrefixI False) (U1 :: Type -> Type))

rev :: Direction -> Direction

Reverse the direcion

data Dart s

A dart represents a bi-directed edge. I.e. a dart has a direction, however the dart of the oposite direction is always present in the planar graph as well.

Constructors

Dart

Fields

• _arc :: !(Arc s)
• _direction :: !Direction

Instances

Enum (Dart s)

Defined in Data.PlanarGraph.Dart

Methods

succ :: Dart s -> Dart s

pred :: Dart s -> Dart s

toEnum :: Int -> Dart s

fromEnum :: Dart s -> Int

enumFrom :: Dart s -> [Dart s]

enumFromThen :: Dart s -> Dart s -> [Dart s]

enumFromTo :: Dart s -> Dart s -> [Dart s]

enumFromThenTo :: Dart s -> Dart s -> Dart s -> [Dart s]

Eq (Dart s)

Defined in Data.PlanarGraph.Dart

Methods

(==) :: Dart s -> Dart s -> Bool

(/=) :: Dart s -> Dart s -> Bool

Ord (Dart s)

Defined in Data.PlanarGraph.Dart

Methods

compare :: Dart s -> Dart s -> Ordering

(<) :: Dart s -> Dart s -> Bool

(<=) :: Dart s -> Dart s -> Bool

(>) :: Dart s -> Dart s -> Bool

(>=) :: Dart s -> Dart s -> Bool

max :: Dart s -> Dart s -> Dart s

min :: Dart s -> Dart s -> Dart s

Show (Dart s)

Defined in Data.PlanarGraph.Dart

Methods

showsPrec :: Int -> Dart s -> ShowS

show :: Dart s -> String

showList :: [Dart s] -> ShowS

Generic (Dart s)

Defined in Data.PlanarGraph.Dart

Associated Types

type Rep (Dart s) :: Type -> Type

Methods

from :: Dart s -> Rep (Dart s) x

to :: Rep (Dart s) x -> Dart s

Arbitrary (Dart s)

Defined in Data.PlanarGraph.Dart

Methods

arbitrary :: Gen (Dart s)

shrink :: Dart s -> [Dart s]

NFData (Dart s)

Defined in Data.PlanarGraph.Dart

Methods

rnf :: Dart s -> ()

HasDataOf (PlanarGraph s w v e f) (Dart s)

Defined in Data.PlanarGraph.Core

Associated Types

type DataOf (PlanarGraph s w v e f) (Dart s) :: Type

Methods

dataOf :: Dart s -> Lens' (PlanarGraph s w v e f) (DataOf (PlanarGraph s w v e f) (Dart s))

type Rep (Dart s)

Defined in Data.PlanarGraph.Dart

type Rep (Dart s) = D1 (MetaData "Dart" "Data.PlanarGraph.Dart" "hgeometry-combinatorial-0.10.0.0-KBhA9TX8xzkAsPm57THGXk" False) (C1 (MetaCons "Dart" PrefixI True) (S1 (MetaSel (Just "_arc") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 (Arc s)) :*: S1 (MetaSel (Just "_direction") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 Direction)))

type DataOf (PlanarGraph s w v e f) (Dart s)

Defined in Data.PlanarGraph.Core

type DataOf (PlanarGraph s w v e f) (Dart s) = e

arc :: forall s s. Lens (Dart s) (Dart s) (Arc s) (Arc s)

direction :: forall s. Lens' (Dart s) Direction

twin :: Dart s -> Dart s

Get the twin of this dart (edge)

>>> twin (dart 0 "+1")
Dart (Arc 0) -1
>>> twin (dart 0 "-1")
Dart (Arc 0) +1

isPositive :: Dart s -> Bool

test if a dart is Positive

Vertices

newtype VertexId s (w :: World)

A vertex in a planar graph. A vertex is tied to a particular planar graph by the phantom type s, and to a particular world w.

Constructors

VertexId

Fields

• _unVertexId :: Int

Instances

Enum (VertexId s w)

Defined in Data.PlanarGraph.Core

Methods

succ :: VertexId s w -> VertexId s w

pred :: VertexId s w -> VertexId s w

toEnum :: Int -> VertexId s w

fromEnum :: VertexId s w -> Int

enumFrom :: VertexId s w -> [VertexId s w]

enumFromThen :: VertexId s w -> VertexId s w -> [VertexId s w]

enumFromTo :: VertexId s w -> VertexId s w -> [VertexId s w]

enumFromThenTo :: VertexId s w -> VertexId s w -> VertexId s w -> [VertexId s w]

Eq (VertexId s w)

Defined in Data.PlanarGraph.Core

Methods

(==) :: VertexId s w -> VertexId s w -> Bool

(/=) :: VertexId s w -> VertexId s w -> Bool

Ord (VertexId s w)

Defined in Data.PlanarGraph.Core

Methods

compare :: VertexId s w -> VertexId s w -> Ordering

(<) :: VertexId s w -> VertexId s w -> Bool

(<=) :: VertexId s w -> VertexId s w -> Bool

(>) :: VertexId s w -> VertexId s w -> Bool

(>=) :: VertexId s w -> VertexId s w -> Bool

max :: VertexId s w -> VertexId s w -> VertexId s w

min :: VertexId s w -> VertexId s w -> VertexId s w

Show (VertexId s w)

Defined in Data.PlanarGraph.Core

Methods

showsPrec :: Int -> VertexId s w -> ShowS

show :: VertexId s w -> String

showList :: [VertexId s w] -> ShowS

Generic (VertexId s w)

Defined in Data.PlanarGraph.Core

Associated Types

type Rep (VertexId s w) :: Type -> Type

Methods

from :: VertexId s w -> Rep (VertexId s w) x

to :: Rep (VertexId s w) x -> VertexId s w

ToJSON (VertexId s w)

Defined in Data.PlanarGraph.Core

Methods

toJSON :: VertexId s w -> Value

toEncoding :: VertexId s w -> Encoding

toJSONList :: [VertexId s w] -> Value

toEncodingList :: [VertexId s w] -> Encoding

FromJSON (VertexId s w)

Defined in Data.PlanarGraph.Core

Methods

parseJSON :: Value -> Parser (VertexId s w)

parseJSONList :: Value -> Parser [VertexId s w]

NFData (VertexId s w)

Defined in Data.PlanarGraph.Core

Methods

rnf :: VertexId s w -> ()

HasDataOf (PlanarGraph s w v e f) (VertexId s w)

Defined in Data.PlanarGraph.Core

Associated Types

type DataOf (PlanarGraph s w v e f) (VertexId s w) :: Type

Methods

dataOf :: VertexId s w -> Lens' (PlanarGraph s w v e f) (DataOf (PlanarGraph s w v e f) (VertexId s w))

type Rep (VertexId s w)

Defined in Data.PlanarGraph.Core

type Rep (VertexId s w) = D1 (MetaData "VertexId" "Data.PlanarGraph.Core" "hgeometry-combinatorial-0.10.0.0-KBhA9TX8xzkAsPm57THGXk" True) (C1 (MetaCons "VertexId" PrefixI True) (S1 (MetaSel (Just "_unVertexId") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 Int)))

type DataOf (PlanarGraph s w v e f) (VertexId s w)

Defined in Data.PlanarGraph.Core

type DataOf (PlanarGraph s w v e f) (VertexId s w) = v

type VertexId' s = VertexId s Primal

Shorthand for vertices in the primal.

Building a planar graph

planarGraph :: [[(Dart s, e)]] -> PlanarGraph s Primal () e ()

Construct a planar graph, given the darts in cyclic order around each vertex.

running time: \(O(n)\).

planarGraph' :: Permutation (Dart s) -> PlanarGraph s w () () ()

Construct a planar graph

running time: \(O(n)\).

fromAdjacencyLists :: forall s w h. (Foldable h, Functor h) => [(VertexId s w, h (VertexId s w))] -> PlanarGraph s w () () ()

Construct a planar graph from a adjacency matrix. For every vertex, all vertices should be given in counter-clockwise order.

pre: No self-loops, and no multi-edges

running time: \(O(n)\).

toAdjacencyLists :: PlanarGraph s w v e f -> [(VertexId s w, Vector (VertexId s w))]

Produces the adjacencylists for all vertices in the graph. For every vertex, the adjacent vertices are given in counter clockwise order.

Note that in case a vertex u as a self loop, we have that this vertexId occurs twice in the list of neighbours, i.e.: u : [...,u,..,u,...]. Similarly, if there are multiple darts between a pair of edges they occur multiple times.

running time: \(O(n)\)

fromAdjRep :: proxy s -> Gr (Vtx v e) (Face f) -> PlanarGraph s Primal v e f

Read a planar graph, given in JSON format into a planar graph. The adjacencylists should be in counter clockwise order.

running time: \(O(n)\)

toAdjRep :: PlanarGraph s w v e f -> Gr (Vtx v e) (Face f)

Transforms the planar graph into a format that can be easily converted into JSON format. For every vertex, the adjacent vertices are given in counter-clockwise order.

See toAdjacencyLists for notes on how we handle self-loops.

running time: \(O(n)\)

Quering a planar graph

numVertices :: PlanarGraph s w v e f -> Int

Get the number of vertices

>>> numVertices myGraph
4

numDarts :: PlanarGraph s w v e f -> Int

Get the number of Darts

>>> numDarts myGraph
12

numEdges :: PlanarGraph s w v e f -> Int

Get the number of Edges

>>> numEdges myGraph
6

numFaces :: PlanarGraph s w v e f -> Int

Get the number of faces

>>> numFaces myGraph
4

darts' :: PlanarGraph s w v e f -> Vector (Dart s)

Enumerate all darts

darts :: PlanarGraph s w v e f -> Vector (Dart s, e)

Get all darts together with their data

>>> mapM_ print $ darts myGraph
(Dart (Arc 0) -1,"a-")
(Dart (Arc 2) +1,"c+")
(Dart (Arc 1) +1,"b+")
(Dart (Arc 0) +1,"a+")
(Dart (Arc 4) -1,"e-")
(Dart (Arc 1) -1,"b-")
(Dart (Arc 3) -1,"d-")
(Dart (Arc 5) +1,"g+")
(Dart (Arc 4) +1,"e+")
(Dart (Arc 3) +1,"d+")
(Dart (Arc 2) -1,"c-")
(Dart (Arc 5) -1,"g-")

edges' :: PlanarGraph s w v e f -> Vector (Dart s)

Enumerate all edges. We report only the Positive darts

edges :: PlanarGraph s w v e f -> Vector (Dart s, e)

Enumerate all edges with their edge data. We report only the Positive darts.

>>> mapM_ print $ edges myGraph
(Dart (Arc 2) +1,"c+")
(Dart (Arc 1) +1,"b+")
(Dart (Arc 0) +1,"a+")
(Dart (Arc 5) +1,"g+")
(Dart (Arc 4) +1,"e+")
(Dart (Arc 3) +1,"d+")

vertices' :: PlanarGraph s w v e f -> Vector (VertexId s w)

Enumerate all vertices

>>> vertices' myGraph
[VertexId 0,VertexId 1,VertexId 2,VertexId 3]

vertices :: PlanarGraph s w v e f -> Vector (VertexId s w, v)

Enumerate all vertices, together with their vertex data

faces' :: PlanarGraph s w v e f -> Vector (FaceId s w)

Enumerate all faces in the planar graph

faces :: PlanarGraph s w v e f -> Vector (FaceId s w, f)

All faces with their face data.

traverseVertices :: Applicative m => (VertexId s w -> v -> m v') -> PlanarGraph s w v e f -> m (PlanarGraph s w v' e f)

Traverse the vertices

(^.vertexData) $ traverseVertices (i x -> Just (i,x)) myGraph Just [(VertexId 0,()),(VertexId 1,()),(VertexId 2,()),(VertexId 3,())] >>> traverseVertices (i x -> print (i,x)) myGraph >> pure () (VertexId 0,()) (VertexId 1,()) (VertexId 2,()) (VertexId 3,())

traverseDarts :: Applicative m => (Dart s -> e -> m e') -> PlanarGraph s w v e f -> m (PlanarGraph s w v e' f)

Traverses the darts

>>> traverseDarts (\d x -> print (d,x)) myGraph >> pure ()
(Dart (Arc 0) +1,"a+")
(Dart (Arc 0) -1,"a-")
(Dart (Arc 1) +1,"b+")
(Dart (Arc 1) -1,"b-")
(Dart (Arc 2) +1,"c+")
(Dart (Arc 2) -1,"c-")
(Dart (Arc 3) +1,"d+")
(Dart (Arc 3) -1,"d-")
(Dart (Arc 4) +1,"e+")
(Dart (Arc 4) -1,"e-")
(Dart (Arc 5) +1,"g+")
(Dart (Arc 5) -1,"g-")

traverseFaces :: Applicative m => (FaceId s w -> f -> m f') -> PlanarGraph s w v e f -> m (PlanarGraph s w v e f')

Traverses the faces

>>> traverseFaces (\i x -> print (i,x)) myGraph >> pure ()
(FaceId 0,())
(FaceId 1,())
(FaceId 2,())
(FaceId 3,())

tailOf :: Dart s -> PlanarGraph s w v e f -> VertexId s w

The tail of a dart, i.e. the vertex this dart is leaving from

running time: \(O(1)\)

headOf :: Dart s -> PlanarGraph s w v e f -> VertexId s w

The vertex this dart is heading in to

running time: \(O(1)\)

endPoints :: Dart s -> PlanarGraph s w v e f -> (VertexId s w, VertexId s w)

endPoints d g = (tailOf d g, headOf d g)

running time: \(O(1)\)

incidentEdges :: VertexId s w -> PlanarGraph s w v e f -> Vector (Dart s)

All edges incident to vertex v, in counterclockwise order around v.

running time: \(O(k)\), where \(k\) is the output size

incomingEdges :: VertexId s w -> PlanarGraph s w v e f -> Vector (Dart s)

All incoming edges incident to vertex v, in counterclockwise order around v.

outgoingEdges :: VertexId s w -> PlanarGraph s w v e f -> Vector (Dart s)

All outgoing edges incident to vertex v, in counterclockwise order around v.

neighboursOf :: VertexId s w -> PlanarGraph s w v e f -> Vector (VertexId s w)

Gets the neighbours of a particular vertex, in counterclockwise order around the vertex.

running time: \(O(k)\), where \(k\) is the output size

nextIncidentEdge :: Dart s -> PlanarGraph s w v e f -> Dart s

Given a dart d that points into some vertex v, report the next dart in the cyclic order around v.

running time: \(O(1)\)

prevIncidentEdge :: Dart s -> PlanarGraph s w v e f -> Dart s

Given a dart d that points into some vertex v, report the next dart in the cyclic order around v.

running time: \(O(1)\)

Associated Data

class HasDataOf g i where

Associated Types

type DataOf g i

Methods

dataOf :: i -> Lens' g (DataOf g i)

get the data associated with the value i.

running time: \(O(1)\) to read the data, \(O(n)\) to write it.

Instances

HasDataOf (PlanarGraph s w v e f) (Dart s)

Defined in Data.PlanarGraph.Core

Associated Types

type DataOf (PlanarGraph s w v e f) (Dart s) :: Type

Methods

dataOf :: Dart s -> Lens' (PlanarGraph s w v e f) (DataOf (PlanarGraph s w v e f) (Dart s))

HasDataOf (PlanarGraph s w v e f) (FaceId s w)

Defined in Data.PlanarGraph.Core

Associated Types

type DataOf (PlanarGraph s w v e f) (FaceId s w) :: Type

Methods

dataOf :: FaceId s w -> Lens' (PlanarGraph s w v e f) (DataOf (PlanarGraph s w v e f) (FaceId s w))

HasDataOf (PlanarGraph s w v e f) (VertexId s w)

Defined in Data.PlanarGraph.Core

Associated Types

type DataOf (PlanarGraph s w v e f) (VertexId s w) :: Type

Methods

dataOf :: VertexId s w -> Lens' (PlanarGraph s w v e f) (DataOf (PlanarGraph s w v e f) (VertexId s w))

endPointDataOf :: Dart s -> Getter (PlanarGraph s w v e f) (v, v)

Data corresponding to the endpoints of the dart

endPointData :: Dart s -> PlanarGraph s w v e f -> (v, v)

Data corresponding to the endpoints of the dart

running time: \(O(1)\)

dual :: Getter (PlanarGraph s w v e f) (PlanarGraph s (DualOf w) f e v)

Get the dual graph of this graph.

Faces

newtype FaceId s w

The type to reprsent FaceId's

Constructors

FaceId

Fields

• _unFaceId :: VertexId s (DualOf w)

Instances

Enum (FaceId s w)

Defined in Data.PlanarGraph.Core

Methods

succ :: FaceId s w -> FaceId s w

pred :: FaceId s w -> FaceId s w

toEnum :: Int -> FaceId s w

fromEnum :: FaceId s w -> Int

enumFrom :: FaceId s w -> [FaceId s w]

enumFromThen :: FaceId s w -> FaceId s w -> [FaceId s w]

enumFromTo :: FaceId s w -> FaceId s w -> [FaceId s w]

enumFromThenTo :: FaceId s w -> FaceId s w -> FaceId s w -> [FaceId s w]

Eq (FaceId s w)

Defined in Data.PlanarGraph.Core

Methods

(==) :: FaceId s w -> FaceId s w -> Bool

(/=) :: FaceId s w -> FaceId s w -> Bool

Ord (FaceId s w)

Defined in Data.PlanarGraph.Core

Methods

compare :: FaceId s w -> FaceId s w -> Ordering

(<) :: FaceId s w -> FaceId s w -> Bool

(<=) :: FaceId s w -> FaceId s w -> Bool

(>) :: FaceId s w -> FaceId s w -> Bool

(>=) :: FaceId s w -> FaceId s w -> Bool

max :: FaceId s w -> FaceId s w -> FaceId s w

min :: FaceId s w -> FaceId s w -> FaceId s w

Show (FaceId s w)

Defined in Data.PlanarGraph.Core

Methods

showsPrec :: Int -> FaceId s w -> ShowS

show :: FaceId s w -> String

showList :: [FaceId s w] -> ShowS

ToJSON (FaceId s w)

Defined in Data.PlanarGraph.Core

Methods

toJSON :: FaceId s w -> Value

toEncoding :: FaceId s w -> Encoding

toJSONList :: [FaceId s w] -> Value

toEncodingList :: [FaceId s w] -> Encoding

FromJSON (FaceId s w)

Defined in Data.PlanarGraph.Core

Methods

parseJSON :: Value -> Parser (FaceId s w)

parseJSONList :: Value -> Parser [FaceId s w]

HasDataOf (PlanarGraph s w v e f) (FaceId s w)

Defined in Data.PlanarGraph.Core

Associated Types

type DataOf (PlanarGraph s w v e f) (FaceId s w) :: Type

Methods

dataOf :: FaceId s w -> Lens' (PlanarGraph s w v e f) (DataOf (PlanarGraph s w v e f) (FaceId s w))

type DataOf (PlanarGraph s w v e f) (FaceId s w)

Defined in Data.PlanarGraph.Core

type DataOf (PlanarGraph s w v e f) (FaceId s w) = f

type FaceId' s = FaceId s Primal

Shorthand for FaceId's in the primal.

leftFace :: Dart s -> PlanarGraph s w v e f -> FaceId s w

The face to the left of the dart

>>> leftFace (dart 1 "+1") myGraph
FaceId 1
>>> leftFace (dart 1 "-1") myGraph
FaceId 2
>>> leftFace (dart 2 "+1") myGraph
FaceId 2
>>> leftFace (dart 0 "+1") myGraph
FaceId 0

running time: \(O(1)\).

rightFace :: Dart s -> PlanarGraph s w v e f -> FaceId s w

The face to the right of the dart

>>> rightFace (dart 1 "+1") myGraph
FaceId 2
>>> rightFace (dart 1 "-1") myGraph
FaceId 1
>>> rightFace (dart 2 "+1") myGraph
FaceId 1
>>> rightFace (dart 0 "+1") myGraph
FaceId 1

running time: \(O(1)\).

boundaryDart :: FaceId s w -> PlanarGraph s w v e f -> Dart s

Gets a dart bounding this face. I.e. a dart d such that the face lies to the right of the dart.

boundary :: FaceId s w -> PlanarGraph s w v e f -> Vector (Dart s)

The darts bounding this face, for internal faces in clockwise order, for the outer face in counter clockwise order.

running time: \(O(k)\), where \(k\) is the output size.

boundary' :: Dart s -> PlanarGraph s w v e f -> Vector (Dart s)

Generates the darts incident to a face, starting with the given dart.

\(O(k)\), where \(k\) is the number of darts reported

boundaryVertices :: FaceId s w -> PlanarGraph s w v e f -> Vector (VertexId s w)

The vertices bounding this face, for internal faces in clockwise order, for the outer face in counter clockwise order.

running time: \(O(k)\), where \(k\) is the output size.

nextEdge :: Dart s -> PlanarGraph s w v e f -> Dart s

Get the next edge along the face

running time: \(O(1)\).

prevEdge :: Dart s -> PlanarGraph s w v e f -> Dart s

Get the previous edge along the face

running time: \(O(1)\).