[Soc-2014-dev] Weekly Report #9: NURBS Modernization

[Sergey Sharybin]

Seems to be rather nice progress. Would be cool if all the bits are
committed and some .blend in shared which demonstrates the stuff.


On Sat, Jul 19, 2014 at 4:31 PM, Jonathan deWerd <jjoonathan at gmail.com>
wrote:

> Progress:
> * Finished code to tessellate trim curves!
>         see:
> http://wiki.blender.org/index.php/User:Jjoonathan/NURBS_In_Blender
> * Rewrote knot code to match the conventions in the math literature,
> tested for compatibility by comparing meshes
> * Worked on adapting a better NURBS evaluation algorithm that can produce
> first and second derivatives (for normals and error bounds, respectively).
>         it's still buggy.
> * Worked further on the NurbEdge interface to handle imported trim curves
>         still working on code to match endpoints that are separated in UV
> space but coincide in R3 due to either wrapping in UV space (cyclic NURBS)
> or coving
>
> Todo:
> * Finish tracking down the NaN-producing bugs in the new surface evaluator
>         From there, should be easy to implement good normals
> * Finish NurbEdge so that it at least handles wrapping in UV space. This
> will allow importing of most .3dm files.
> * Implement revolution surfaces.
>         Demo Claas's hairdryer model!
>
> On Jul 12, 2014, at 11:14 AM, Jonathan deWerd <jjoonathan at gmail.com>
> wrote:
>
> > (Apologies if this is a duplicate email. I see a copy of this email in
> gmail's "sent" folder but I don't see one in my inbox, so I'm sending
> again.)
> >
> > Progress:
> > * Finished the code that traverses BReps from 3dm files and cuts them
> into surfaces
> > * 2D Trim curves import as Nurb objects that are appended to a NurbList
> in their parent surface
> >       Just curves currently, I still have to get multi-part loops working
> >       Also they don't seem to be preserved by DNA even after calling
> makesdna...
> > * Moved surf_gridmesh into bf_blenkernel, promoted curve.c to curve.cpp
> (for future OpenNurbs use), fixed a few small bugs that caused, moved the
> GLUT debug code into blender/tests, convinced CMake to build and link it
> > * Wrote, debugged the method that builds the displist from the gridmesh
> > * Timed it, see pretty graph a few emails back
> > * Started writing NurbEdge structure to handle in general the sewing of
> trim edges and cyclic edges (e.g. so that spheres don't have seams)
> >
> > Next up:
> > * I still need to finish the code that tessellates the trim curves. I
> didn't get much time to work on it today, so I'm planning to work on it
> tomorrow as well.
> > * Get trim curves to load/save from .blend files by figuring out what
> I'm doing wrong with makesdna
> > * Finish NurbEdge interface for defining edges to sew, get it in DNA as
> well
> > * Use NurbEdge to implement revolution surfaces
> >
>
> _______________________________________________
> Soc-2014-dev mailing list
> Soc-2014-dev at blender.org
> http://lists.blender.org/mailman/listinfo/soc-2014-dev
>



-- 
With best regards, Sergey Sharybin
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.blender.org/pipermail/soc-2014-dev/attachments/20140719/36d01dc3/attachment.htm