[OpenSCAD] Functional OpenSCAD, working with vertex data

Hans L thehans at gmail.com
Tue Jan 30 12:05:32 EST 2018


I wonder if we could alleviate most of the slowdown of implicit union
by having group nodes do a simple bounding box check before passing to
CGAL, if no bounding boxes overlap then just skip it?


On Tue, Jan 30, 2018 at 10:49 AM, Jordan Brown
<openscad at jordan.maileater.net> wrote:
> On 1/30/2018 8:41 AM, Parkinbot wrote:
>
> JordanBrown wrote
>
> So you're saying it's better if the objects are simple and direct
> children of the hull, rather than being a union (through whatever
> mechanism) of those same objects?
>
> Exactly. Have a look at the CSG structures. Results of a for loop are
> represented as group node and processed as (implicit) union. And this needs
> to be done by CGAL.
>
>
> Not knowing how hull( ) works, I wouldn't have expected there to be a
> difference.
>
> Good information, thanks.
>
>
> _______________________________________________
> OpenSCAD mailing list
> Discuss at lists.openscad.org
> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
>




More information about the Discuss mailing list