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List:       berlin-widget
Subject:    Re: [Fresco-devel] Fresco::Mesh
From:       Stefan Seefeld <stefan () fresco ! org>
Date:       2002-12-02 4:45:17
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Nick Lewycky wrote:

> I'd like to add another element to this struct which specifies whether 
> the model is solid or just a shell.

why should that be an attribute of the scene graph node and not the
DrawingKit ? I'm just wondering, because right now most of these are
pushed onto the DK state stack.

> At the moment we don't use Fresco::Mesh for any sort of intersection, 
> picking, or hit detection so there's no need to change any code to 
> handle the shell/solid distinction. If were are to ever do intersection 
> testing with Meshes, a figure entirely contained within a "shell" Mesh 
> should be considered non-intersecting, while it would be intersecting a 
>  "solid" Mesh with the same vertices.

ah, that answers the above question. There is more than rendering
that is affected by this...

> Can I have an opinion from the powers-that-be about making this change 
> to the core API? (Further, should we have a formalized process for 
> changing the public API bits? I like the idea just so that in the future 
> we have the mailing list thread to refer to.)

well, there aren't many people right now making educated suggestions
about interface changes, it's not a coordinator's nightmare just yet :)

so yes, that sounds like a sensible change. I'm fine with it.
By the way, we should add a new task about implementing a 3D capable
PickTraversal (i.e. with more than just 2D bounding box intersection).

Regards,
		Stefan


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