**Name**

**flst_boundary** Find boundary of shape

**Command Synopsis**

**flst_boundary** *tree* *shape* *boundary*

tree: The tree of shapes

shape: The shape whose boundary is to be computed

boundary: boundary computed (output Flist)

**Function Summary**

Flist flst_boundary (pTree , pShape , pBoundary )

Shapes pTree ;

Shape pShape ;

Flist pBoundary ;

**Description**

This fills the field `boundary` of a `Shape` issued from a tree
(see `flst_boundary`). It is a list of 2-D points with integral
coordinates. The last point is equal to the first one if the shape is
closed. If the shape is open, the two extremal points are at the border of the
image. The shape is followed in counterclockwise direction, so that the shape
is on left hand side and the exterior on right hand side.

**See Also**

`ll_boundaries`, `ll_edges`, `ll_extract`.

**Version 1.0**

Last Modification date : Thu Nov 29 20:23:56 2001

**Author**

Pascal Monasse