Do other EDA tools allow model scaling? Altium doesn't even allow VRML import in the first place.
On Tue, Sep 29, 2020 at 1:10 PM Seth Hillbrand <s...@kipro-pcb.com> wrote: > Well, we've backed ourselves into a bit of a corner. VRML is specified in > meters, so if we're assuming inches, we're a bit off in left field. But do > we need three separate scale parameters? We could reduce to 1, correct? > > In the official footprint library, we have 7 footprints that specify > non-unity scaling. (Banana_Jack_[1-3], NS-Tech_Grove_1x04, Fuse_Blade_ATO, > Fuse_Blad_Mini, Oscillator_SMD_TXC0_G158). > > -Seth > > > > > On Tue, Sep 29, 2020 at 9:30 AM Ian McInerney <ian.s.mciner...@ieee.org> > wrote: > >> We can't remove the scaling option until we make the VRML importer handle >> proper unit selection. I have routinely run into the case where I go >> OpenSCAD -> Wings3D -> KiCad and design a model using mm in OpenSCAD >> because it makes for easier computations (all the datasheet values are >> nicely given in mm) and then have to apply a scaling factor of 0.3937 to >> all the axes in KiCad to make it the proper size because we seem to have a >> hardcoded assumption about what unit system the VRML file is in. >> >> In fact, the KLC says: WRL files do not specify absolute dimensions. >> KiCad normalizes model parameters to units of inches and the internal units >> (dimensionless) of the WRL model must be scaled accordingly. >> >> -Ian >> >> On Tue, Sep 29, 2020 at 4:50 PM Seth Hillbrand <s...@kipro-pcb.com> >> wrote: >> >>> There has been some discussion to removing the scale option here >>> altogether. The logic being that if you need the model scaled, you should >>> be doing this in your solid CAD not in your electronic CAD. I have come >>> around to this idea and it might be worth implementing rather than doing >>> the scale limiting. >>> >>> -Seth >>> >>> On Tue, Sep 29, 2020 at 4:52 AM Mário Luzeiro <mrluze...@ua.pt> wrote: >>> >>>> Hi all, >>>> >>>> I'm wondering if it is safe to limit the scale of shapes to be positive >>>> values? >>>> >>>> Applying negative scales will cause inverted shapes and render issues >>>> on the models. >>>> >>>> Could be that anyone in the world is using negative scale values? >>>> or should be safe to limit it? >>>> >>>> This is related with this issues: >>>> https://gitlab.com/kicad/code/kicad/-/issues/5817 >>>> >>>> Mario >>>> _______________________________________________ >>>> Mailing list: https://launchpad.net/~kicad-developers >>>> Post to : kicad-developers@lists.launchpad.net >>>> Unsubscribe : https://launchpad.net/~kicad-developers >>>> More help : https://help.launchpad.net/ListHelp >>>> >>> >>> >>> -- >>> [image: KiCad Services Corporation Logo] >>> Seth Hillbrand >>> *Lead Developer* >>> +1-530-302-5483 <+12126039372> >>> Davis, CA >>> www.kipro-pcb.com i...@kipro-pcb.com >>> _______________________________________________ >>> Mailing list: https://launchpad.net/~kicad-developers >>> Post to : kicad-developers@lists.launchpad.net >>> Unsubscribe : https://launchpad.net/~kicad-developers >>> More help : https://help.launchpad.net/ListHelp >>> >> > > -- > [image: KiCad Services Corporation Logo] > Seth Hillbrand > *Lead Developer* > +1-530-302-5483 <+12126039372> > Davis, CA > www.kipro-pcb.com i...@kipro-pcb.com > _______________________________________________ > Mailing list: https://launchpad.net/~kicad-developers > Post to : kicad-developers@lists.launchpad.net > Unsubscribe : https://launchpad.net/~kicad-developers > More help : https://help.launchpad.net/ListHelp >
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