Re: [K3d-development] Re: icons

[Timothy M. S. <ts...@k-...>]

Rene Jensen wrote:
> Good evening everybody.
> 
> All icons are here: http://www.averna.dk/projects/k3d/k3dicons.tar.gz
> except those for a handful of plugins which I couldn't figure out.

Rene:

Sorry for the slow replies, I've been recovering from a bad cold. 
Everything is in CVS, looks great!

As far as your questions go, subdivision surfaces are a type of smooth 
surface defined by a polyhedron - the smooth surface follows the 
"outline" of the polygons in an intuitive and useful way that has become 
very popular with modelers.  So "MakeSDS" is a filter that flags a mesh 
as a subdivision surface (SDS).  "SDSCrease" can be used to assign 
variable-sharpness creases to the edges of an SDS, "SDSCorner" does the 
same thing for individual points.  "SDSHole" tags individual polygons as 
"holes" that don't show up in the SDS, even though they contribute to 
its shape.

The CatmullClark filter is a polygon subdivison filter - you put 
polygons in, you get polygons out.  MakeSDS is converting from one 
geometric datatype (polyhedra) to another (SDS).  The distinction isn't 
obvious in the viewport, because our SDS preview has limited fidelity. 
If you render your scene though, you'll see that the SDS renders as a 
perfectly smooth shape, while the CatmullClark filter just produces more 
polygons.

Same thing for MakeCreases - it only affects geometry that has had 
creases applied with SDSCrease.

You'll have to pester Romain about QuadricDecimation.

Cheers,
Tim