Thanks for your reply Justin
Well I'm working on a p3@800 wirh 512 Mb and a geForce 2 GTS with 64 Mb (with Win98), so I tryed the labelOverlayDemo sample and I get 1 or 2 FPS (do you have similar performance ?) I take a look at the overlay library and it is really a great job, and I don''t understand why I get this bad result
In the next days I'am going to see how it works with j3d 1.3
I used Jwindow to do some stuff but I need really to have some parts of my overlay transparent
I'd like to know how people who need overlays do, I need help !!!
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Justin Couch <[EMAIL PROTECTED]> wrote:
Enrique Dumas wrote:
> in fact in my app I don't need to handle some mouse events but only
> drawing the overlay.
>
> I tryed the scribble demo because when I used the overlayBase class ,
> nothing happened
The base class is not designed to operate standalone. It is supposed to
be derived for whatever custom functionality you wish to implement. To
see how it works, have a look at any of the other pre-built overlays
there. Probably the best one to look at is LabelOverlay as that shows
all the event buffering etc.
> I think I missed some things to do the job, I'd like to know if the
> overlayBase class is "fast"
I can't tell you. There is no definition of fast. Overlays place a
texture in front of the user and always retain it screen aligned. It
uses transparent textures and geometry. There's double buffering and all
sorts of other things going on. So much depends on your graphics
hardware. The only way you can work out whether it is suitable is to put
it into your code and measure the performance impact in your
application. Every time you add another polygon, texture, light etc it
will have some impact on the performance. Whether that is too much is
something only you can tell and not something that I can offer any
comment on.
--
Justin Couch http://www.vlc.com.au/~justin/
Java Architect & Bit Twiddler http://www.yumetech.com/
Author, Java 3D FAQ Maintainer http://www.j3d.org/
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Neither man nor woman is the measure of all things. Every organism
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all your brains, would be useless in a mouse's universe..."
- Greg Bear, Slant
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