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Message #14170
Re: 3D-Viewer new rendering and contributions.
----- Original Message -----
> From: Mário Luzeiro <mrluzeiro@xxxxx>
> To: Cirilo Bernardo <cirilo_bernardo@xxxxxxxxx>; jp charras <jp.charras@xxxxxxxxxx>; "kicad-developers@xxxxxxxxxxxxxxxxxxx" <kicad-developers@xxxxxxxxxxxxxxxxxxx>
> Cc:
> Sent: Thursday, July 31, 2014 6:24 PM
> Subject: RE: [Kicad-developers] 3D-Viewer new rendering and contributions.
>
>> Any suggestions on how this can be unified will be welcome. One option
>> is to add a selection item to the VRML dialog to specify if the offset
>> is mm or inch. With that option I can also implement a good IDF solution.
>> - Cirilo
>
> I don't know how KiCad deals with unities.
> As a KiCad user I feel that the offset dialogue should be using the same mm/In
> mechanism selection.
>
> After that, maybe for historical reasons, the Wings3D unit size should be kept.
>
> You may have a look on the VRML 1 (format) models from 3D Content Central. They
> come with very small scale. I notice I had to scale it by 254 to make it the fit
> the correct size (sorry I didn't scientific investigated the math unities
> here). But, that it to point that different model sources will have different
> unities .. so I guess KiCad have to follow just one unity (the "Wings3D
> unity")
>
The VRML specification states that 1VRML unit = 1m, but this is not a requirement.
So KiCad used 1VRML = 0.1inch and many models on the internet use the VRML
recommendation.
> As a KiCad user, right now, I use the 3d Viewer mostly as an amusement feature
> rather than an mechanical aspects validation tool. So as long as it looks good,
> It will make me happy :)
> but it will be nice if we keep the "science visual validation" of the
> PCB/models.
>
I agree; it's eye-candy, but it is very impressive to people who are not
electronics engineers and it can help to get support for a project.
- Cirilo
References