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
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