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6.7.4 Paths

Paths are represented by lists of connected points. Paths can be open, where the first and last points in the list are not considered connected, or closed, where the first and last points are considered connected.

Values of type path are specified using the following syntax:

( ( x1 , y1 ) , ... , ( xn , yn ) )
[ ( x1 , y1 ) , ... , ( xn , yn ) ]
  ( x1 , y1 ) , ... , ( xn , yn )
  ( x1 , y1   , ... ,   xn , yn )
    x1 , y1   , ... ,   xn , yn

where the points are the end points of the line segments comprising the path. Square brackets ([]) indicate an open path, while parentheses (()) indicate a closed path.

Paths are output using the first syntax.