Robert Bradshaw wrote: > I don't believe we have anything like this yet, but it seems it could > be (relatively) easily built on top of the new and very cool 3d > implicit plotting functionality. >
Also, the region parameter should be very useful for this (which basically implements nice clipping of 3d objects). See http://trac.sagemath.org/sage_trac/ticket/5514 for a not-quite-finished patch. Jason > - Robert > > On May 15, 2009, at 1:42 AM, Jurgis Pralgauskis wrote: > > >> Hello, >> >> stereometry needs imagination or more experience, >> to understand cross-sections and so on >> >> I found some interactive example >> http://www.learner.org/courses/learningmath/geometry/session9/ >> part_c/index.html >> >> I'd like to have sage interact for solid construction and >> cutting_plane parameters >> and then view it around via jmol :) >> >> in school this is mostly needed for parallelepiped or pyramid solids: >> >> mysolid = SomeSolid(apex_points_3D) >> # and I can get, mysolid.surface_planes() >> #so I'd expect to have algorithms which detect >> >> intersection = Intersection(mysolid, cutting_plane) >> # we get some 2D polygon, >> # probably first analytically find intersection.lines >> # and then solve the >> # self.segmets = self.endpoints (self.lines , self.mysolid) >> # for conic would be some different approach ... >> >> intersection.fill() # or draw() would draw some lines or color to >> show it >> >> >> what does sage have already, and what would need to be hacked? >> >> Thanks in advance :) >> >> ps.: just for reference >> http://en.wikipedia.org/wiki/Cross_section_(geometry) >> http://en.wikipedia.org/wiki/Conic_section >> >> -- >> Jurgis Pralgauskis >> Don't worry, be happy and make things better ;) >> >> > > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sage-edu" group. To post to this group, send email to sage-edu@googlegroups.com To unsubscribe from this group, send email to sage-edu+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-edu?hl=en -~----------~----~----~----~------~----~------~--~---
