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bangerth / helmholtz

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Milestone 1: Implement a way to scale STL geometry to SI units #1

Closed bangerth closed 3 years ago

bangerth commented 3 years ago

there is some confusion with units because the STL file does not use SI units but uses mm for lengths, whereas internally I use SI units)

When I send an STL file to someone, I usually tell them the units. Usually it's mm, sometimes it's inches. Then when the people import it into whatever CAD software they're using, they apply a scaling factor to represent it in whatever units they use in their CAD file.

So I suspect we'll need to have them provide the units used in the STL file, or perhaps a simple multiplicative value that will convert the units to meters.

bangerth commented 3 years ago

Fixed by 978aee1.

bangerth commented 3 years ago

Also d3bc8b3.