----- Original Message -----
From: Dvorak, Daniel J. <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, June 19, 2000 5:26 PM
Subject: Re: [JAVA3D] many shape3d objects
> So you can change the color of a polygon face by changing the color of the
> vertices?
Yes!
Do you still need a reference to an appearance so the face will
> be drawn?
No, when you use color vertices you dont have to use Coloring
Attrbutes...but you still have to use PolygonAttributes for the polygons to
be drawn the way you want...for back-face culling purposes, for instances...
Did the memory requirement go down significantly when you put all
> the polygons into one Shape3D?
Yes, as you can imagine the graph is much smaller with 1 shape3D, 1 geometry
and 1 appearance node than with 30000..:o)))
so the memory requirements are much smaller...
> Daniel
>
> -----Original Message-----
> From: Bruno Sousa Caiado [mailto:[EMAIL PROTECTED]]
> Sent: Monday, June 19, 2000 11:30 AM
> To: [EMAIL PROTECTED]
> Subject: Re: [JAVA3D] many shape3d objects
>
>
> Hello,
> I had a similar problem with my project and i solved it using the Indexed
> geometry classes provided by j3d. With this classes you put as many
polygons
> as you want in one shape3D (check out the IndexedGeometryArray class in
the
> API)
>
> As far as changing the appearance of the individual polygons, you can
change
> their color if you�re able to know what are the vertices that belong to
the
> polygon in question. All you have to do is use an array to map the color
> onto the vertices (as opposed to using the appearance to set the color...)
> and then change the color at the specified indices of the array...
> Hope it helps...
> Good luck and good work...
>
> Bruno Caiado
>
> ----- Original Message -----
> From: Dvorak, Daniel J. <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Monday, June 19, 2000 3:38 PM
> Subject: [JAVA3D] many shape3d objects
>
>
> > In my project, I need to draw about 30000 polygons, each individually
> > pickable. When a polygon is picked, I change the color by changing the
> > appearance reference. Currently I create a Shape3D for each polygon,
and
> > this requires about 160Mb of RAM. I think the huge memory requirement
is
> > due to the number of Shape3D objects. Is there a way to create all my
> > geometry using one Shape3D and still have the ability to change
appearance
> > of individual polygons?
> >
> > Daniel
> >
> >
>
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>
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>
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