[OpenSCAD] Functional OpenSCAD, working with vertex data

Hans L thehans at gmail.com
Tue Jan 30 14:35:45 EST 2018


By the way, here is a relevant issue that looks like had a lot of work
done towards it but never completely finalized.

Lazy union (aka. no implicit union):
https://github.com/openscad/openscad/issues/350

On Tue, Jan 30, 2018 at 1:25 PM, jon <jon at jonbondy.com> wrote:
> I would welcome a switch that turned off implicit union, if the result was
> better performance.  I understand that I would need to alter my source code,
> and that I might need to modify library source code.
>
> Jon
>
>
>
> On 1/30/2018 2:05 PM, Carsten Arnholm wrote:
>>
>> On 30. jan. 2018 17:49, Jordan Brown wrote:
>>>
>>> Not knowing how hull( ) works, I wouldn't have expected there to be a
>>> difference.
>>>
>>> Good information, thanks.
>>
>>
>> The problem is not hull(), but implicit union. Hull only needs the points
>> in the input mesh(es). Applying [implicit] union() before applying hull() to
>> the result is like unknowingly driving with the hand brake engaged. You
>> perform a potentially costly computation (union()) only to immediately throw
>> away the result.
>>
>> One idea would be to provide an option to switch off implicit union, and
>> such issues will go away.
>>
>> Carsten Arnholm
>>
>> _______________________________________________
>> OpenSCAD mailing list
>> Discuss at lists.openscad.org
>> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
>>
>>
>
> --
> Sent from my desktop computer.
> I do not receive emails while away from my desk,
> nor do I receive texts on my main phone number
> (which is a land line).
> If you know that I am on the road, please text me.
> If you know that I am home, please email me.
>
>
> _______________________________________________
> 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