CGAL users discussion list

[Efi Fogel <>]

On Wed, Dec 3, 2014 at 4:45 PM, Lars Ole Belhage <> wrote:

Ok - thanks for a quick answer, spared me for trying in vain!

But the boolean operations takes generalized polygons ?

Indeed.
 

Many regards
Belhage

On Wed, 2014-12-03 at 12:46 +0200, Efi Fogel wrote:
> I'm afraid not.
>
> The input is restricted to a "standard" polygon (or polygon with
> holes), which can be represented by a sequence (or sequences if it has
> holes) of points for example.
>
> The output is what we call a generalized polygon (or a generalized
> polygon with wholes.) A generalized polygon must be represented by a
> sequence (or sequences if it has holes) of curves.
>
> Computing the Minkowski sum or even the offset of a generalized
> polygon, I think, is much more complicated.
>
>
>
>    ____  _        ____             _
>   /_____/_) o    /__________  __  //
>  (____ (   (    (    (_/ (_/-(-'_(/
>                          _/
>
>
>
>
> On Mon, Dec 1, 2014 at 10:42 PM, Lars Ole Belhage
> <> wrote:
>         Hello,
>
>         Running the many of the small test programs has convinced me
>         of the
>         versatility and elegance of the CGAL.
>
>         Now, I'm trying to find a way to run the output of
>         offset_polygon_2 into
>         another offset_polygon_2. But after browsing documentation,
>         I'm getting
>         a little worried - can the "offset" algorithms work with
>         polygons with
>         arcs (or splines) in them ?
>
>         If "yes", I will dig deeper and get the right traits to my
>         data (but an
>         simple extension of the the Minkowski_sum_2/exact_offset.cpp
>         to do the
>         sum several times, would of course be of great help)
>
>         If "no", well...
>
>         Great Salutions
>         Belhage
>
>
>
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