i have a related question. i slightly modified the code you previously attached, Barend (see attachment).

- assume we have an intersection point C of a polygon with a segment/linestring. C lies on the segment defined by the pair of points A and B, which are stored in the polygon. is it possible to return A and B, not only C?
- is it possible to have a polygon made of segment, something like boost::geometry::model::polygon< segment > ?

questions not directly related to the thread's question, but related to the attached code (should i start a new topic?):
- i use a custom point class myPoint. how to register the getter and setter template methods (e.g. get<0>)?
- can i register std::shared_ptr<myPoint> instead of myPoint?
- why is boost::geometry::model::polygon< std::shared_ptr<point> > not working?

thanks
simon


On 08/19/2013 09:13 PM, Barend Gehrels wrote:

Hi,

On 16-8-2013 11:54, Hunk wrote:

hello sorry my example was wront

Indeed wrong ;-)

he cant do the intersection between segment and polygon.

That is correct, that combination is not yet possible. Will be done.
However, with a linestring with two points you can do exactly this.

It is possible to define lines with and origin point and a direction? not
only a segment?

No unless you make it yourself (you can easily create a function doing that). By default it is not supported.

And i want the intersection point on the border of the polygon not the
segment inside.

Intersection points, if any, should never be inside indeed, always on the border.

Attached my version of your program (now complete and compiling and working).

Regards, Barend

_______________________________________________
Geometry mailing list
Geometry@lists.boost.org
http://lists.boost.org/mailman/listinfo.cgi/geometry

_______________________________________________
Geometry mailing list
Geometry@lists.boost.org
http://lists.boost.org/mailman/listinfo.cgi/geometry