Subject:
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Re: I need insight/ideas for my new LDraw editor
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Newsgroups:
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lugnet.cad
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Date:
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Sat, 1 Jan 2011 15:27:22 GMT
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Viewed:
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16864 times
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In lugnet.cad, Anders Isaksson wrote:
> Roland Melkert wrote:
>
> > But how to implement visible grid/guide lines in a 3D perspective
> > display editing enviroment?
>
> I would suggest having a 'drop plane' which you place first - by clicking on
> an existing part or by just placing it, possibly adjusting its position and
> angle by numbers. Then all the parts you place are put on the drop plane,
> with or without snapping to the grid on the drop plane, but always snapping
> to the plane.
I was thinking along this approach too, this is how far I got during my summer
vacation:
http://www.ld4dstudio.nl/action/download/placement.png
The main problem I'm having is how to handle zero point of parts, as you can see
the part (like most) in the picture has it's zero point on top. So while placing
it (absolutely) it will end up below the grid plane. I could correct for that by
introducing e.g. relative/absolute placement mode's. But I feel that will
complicate things because when using relative I could imagine people want don't
always wan't it to the bottom, may be you want to place a brick with it's left
side against the grid for some reason. This will cause 6 relative modes, and 1
absolute mode.
Nothing wrong with options but how to control all these options/operation
without scaring the #$@$# out new LDraw users :)
> <snip>
>
> The visible size of the drop plane should be easy to change, also its center
> point, although for placement, it should be considered infinite.
I think it's basically the current frustum space in which the grid is
drawn/sized. But getting a good (fitting/efficient) frustum space during editing
is a challenge on it own imho.
>
> Those are my ideas for a next generation of BlockCAD, which will probably
> never even get started...
It's hard to find time indeed, especially when you're stuck on these kind of
interface questions.
Roland
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Message has 1 Reply:
Message is in Reply To:
 | | Re: I need insight/ideas for my new LDraw editor
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| (...) I would suggest having a 'drop plane' which you place first - by clicking on an existing part or by just placing it, possibly adjusting its position and angle by numbers. Then all the parts you place are put on the drop plane, with or without (...) (13 years ago, 31-Dec-10, to lugnet.cad)
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