[OpenSCAD] General approach

arnholm at arnholm.org arnholm at arnholm.org
Mon Jul 8 11:49:46 EDT 2019

On 2019-07-08 15:47, Alan Cox wrote:
>> using STL than the difference between double precision and 'rational
>> numbers'. Single precision is equivalent to just 6-7 significant 
>> digits.
> But if you are speed obsessed you can just fixed point, which is more
> stable, means all your operations occur on fixed sized cubes that don't
> change with position, and is somewhat easier to vectorise, especially 
> on
> low end processors.
> Alternatively you use the GPU to do the work.
> Alan

STL format has nothing to do with speed. You can use whatever method you 
think will work (whether it does or not), but if you export to STL you 
must adhere to the definition of that file format. In binary form that 
means single precision with just 6-7 significant digits. This is 
unrelated to computations employed, with or without obsessions.

Carsten Arnholm

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