[OpenSCAD] User Poll: What do you want to see from OpenSCAD development?

david vanhorn kc6ete at gmail.com
Tue Nov 12 20:26:12 EST 2019


I'd like to see clipping planes

On Tue, Nov 12, 2019, 5:26 PM Adam Purdie <adam at symmetry.ninja> wrote:

> This suggestions thread is being hijacked by this argument, how about
> people make suggestions and the OpenSCAD people decide what to include and
> we just leave disagreements to Twitter, Facebook and other social media.
>
> On Wed, 13 Nov 2019, 11:12 am Jordan Brown, <openscad at jordan.maileater.net>
> wrote:
>
>> On 11/12/2019 3:15 PM, nop head wrote:
>>
>> It would mean I could accidentally design non-printable object instead of
>> being told it was non-manifold.
>>
>>
>> Why should OpenSCAD concern itself with printability?  If it does,
>> shouldn't it also reject ludicrously large objects or ludicrously small
>> ones?  Shouldn't it insist that all values be multiples of the print
>> resolution?
>>
>> Maybe it's algorithmically impossible to disambiguate triangle-soup
>> representations that have shared edges.  (I don't know one way or
>> another.)  If so, that should prevent exports of such objects to
>> triangle-soup file formats, but shouldn't prevent it for file formats where
>> there's no problem.
>>
>> If your slicer can't handle such an object... then that's on the slicer.
>>
>> OpenSCAD can't represents objects with more than 3 dimensions, with
>> dimensions of zero or infinity or imaginary numbers. All of these are
>> mathematically possible by why spend time extending OpenSCAD to generate
>> them when they are not physically possible?
>>
>>
>> See, what we're disagreeing on is whether the objects being discussed are
>> physically impossible, *within the approximations implicit in 3D printing,
>> and in the real world at the microscopic and atomic levels*.
>>
>> I contend that for all practical purposes they are possible, and that
>> they are certainly no more impossible than objects separated by epsilon or
>> overlapping by epsilon.
>>
>> I don't remember:  were you one of the people who was arguing that
>> malformed polyhedra (disconnected faces, et cetera) should be allowed?
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>>
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