At 09:59 PM 3/22/2003 +0100, you wrote:
Hello,
I would like to know if it is possible in MetaPost (in particular MetaFun) to get all the possible intersection points of the paths, with some kind of simple command, with a syntax like, say:
A[] := path1 intersections path2
(where the resulting list could be either a list of points or a list of time pairs, like for intersectiontimes).
Another possible syntax could be
path3 := path1 intersections path2
which would give a path for which times 0, 1, 2, 3, ... give the first, second, third, fourth, ... intersection point.
Anything like this?
not that i know, but assuming that those path have some distance, i can imagine dividing a path in parts and determining the intersectionpoints iof the pieces; delta := .25 ; for i=0 step delta upto length(p)-delta : if intersection_found(1,subpath(i,i+.1) of p) : store point fi ; endfor ; ..... Hans ------------------------------------------------------------------------- Hans Hagen | PRAGMA ADE | pragma@wxs.nl Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: +31 (0)38 477 53 69 | fax: +31 (0)38 477 53 74 | www.pragma-ade.com ------------------------------------------------------------------------- information: http://www.pragma-ade.com/roadmap.pdf documentation: http://www.pragma-ade.com/showcase.pdf -------------------------------------------------------------------------