Hi Friedrich, Thanks for your message.
On Thu, Feb 25, 2010 at 9:24 AM, Friedrich Romstedt <friedrichromst...@gmail.com> wrote: > I have worked in highschool on a project "Beam tracing" where I had to > subdivide triangles from a certain point of view with z-ordering and with > such a subdivision how they are covered by the viewing beam. This means > this engine you want to write already exists. See the following ascii > graphics: Of course many 3D engines do this already, but the problem is always the integration. Is your engine python based and is the code (freely) available? I would be interested in taking a look. Also, currently the native mpl structures are polygons instead of a triangles, so they will have to be decomposed. This will definitely cause some issues with line styles etc. that should not be applied to all edges. Cheers, Reinier > > +------------+ > | / > | 1 / > | / > | +-----/------+ > | \ 2 / / > | \ / / > | / 3 / > | / \ / > | / \ / > | / \/ > | / > |/ > > Say that 1 is in front of 2 + 3. Then the engine will leave 1 unchanged, > will discard 2, and will subdivide 3 into a number of sub-triangles, which > comprise 3 exactly. > > Don't know whether you are interested in the tringles at all or only in the > pathes of their contours. > > The engine assumes that the sets of points comprising the sufaces of the > triangles are disjoint. > > Friedrich > > 2010/2/25 Reinier Heeres <rein...@heeres.eu>: >> Hi all, >> >> I'll mention again that I intend to continue supporting mplot3d, >> although help would be greatly appreciated. >> >> I think the z-ordering issues are in the end quite hard to tackle, >> especially since we can have different kinds of structures in a plot, >> e.g. polygons and lines (or rather: curves). >> >> John's suggestion of a global polygon list would indeed be a good way >> forward, and I will think about implementing this soon. However, the >> next step of finding intersecting polygons and breaking them properly >> could be quite slow if implemented in pure python. So I'm not sure >> whether our goal should be to create a full 3d engine... >> >> Cheers, >> Reinier > > ------------------------------------------------------------------------------ > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > -- Reinier Heeres Tel: +31 6 10852639 ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
