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Re: gEDA-user: )(
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Kai-Martin Knaak wrote:
> On Sat, 03 Oct 2009 14:03:55 +0100, andrew whyte wrote:
>
>> but rather than going down the route of
>> needing schematics symbols, footprints and 3d models for each component
>> in a design, could we add a "height" attribute to the schematics (this
>> wouldn't be a big job for the designer using gattrib). Then if someone
>> could script something that takes the board outline, and adds block
>> shapes based on the PCB footprint (outline) and the height for each
>> component, the results would be a viable 3D skyline that would be
>> workable from a CAD perspective, low maintenance, and would also give
>> you an idea of the 3D system.
>
> This is good for most components. But some need more information to take
> full advantage from 3D. The models for connectors and switches should
> give the height and coordinates of the necessary holes. Components with a
> heatsink should hint, where they need to be screwed.
>
> Why not allow three levels of detail:
>
> 1) No 3D info given --> Guess some decent height from the silk of the
> footprint.
I won't recommend that. Guessing is a bad idea because if it's wrong,
bad things can happen: The PCB doesn't fit into the case.
>
> 2) Height info given --> Draw a rectangular solid based on outline and
> height
Why not extrude the silk screen outline? That would work for many
complicated parts like most heatsinks, capacitors, IC sockets.
>
> 3) Full 3D model present --> Add the model to the 3D representation of
> the board.
That's the best way -- but of course it's a lot of work to come into a
position where you have all the 'standard' parts you work with all day
in a perfect 3d model.
Do you know Eagle3D? They produce some PovRAY files from the Eagle PCB
files and render them.
http://www.matwei.de/doku.php?id=en:eagle3d:eagle3d
- - cl
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