One thing I have found is that if I make one large mesh and texture map it,
it renders more slowely than if I make multiple meshes and then tile them.
I think it is related to the texture. If you turn off texture mapping, and
go with color only does your framerate speed up?
Dave Yazel
> ----------
> From: Bobby Martin[SMTP:[EMAIL PROTECTED]]
> Reply To: Discussion list for Java 3D API
> Sent: Thursday, August 17, 2000 11:54 AM
> To: [EMAIL PROTECTED]
> Subject: [JAVA3D] Terrible frame rates
>
> <<File: demo.jar.zip>>
> I put up some questions here a couple of weeks ago about terrible frame
> rates I'm getting. Many people seem to have hardware acceleration up and
> going with no problems. Since this demo has failed to run at acceptable
> speeds on so many different PCs, I'd like to get someone who's sure that
> they have hardware acceleration to run the demo and tell me if they get
> the
> terrible frame rates (~2 frames a second, at best!) that I'm getting.
>
> Also, it does a few of the things that people have been requesting; i.e.
> the
> viewpoint maintains a set height over rough terrain as you move, and I
> calculate correct texture coordinates for tiling an image over the terrain
> surface.
>
> Also, it appears that my viewing distance is about 50 meters, even though
> I
> have added a ClipLeaf centered at the origin, with a bounds of 1000
> meters,
> and a back clip of 1000 meters. Bonus brownie points to anyone who can
> tell
> me why my clipping is wrong :)
>
> I have included all source, and you are welcome to use it however you
> like.
> If you fix bugs, please let me know.
>
> To run the demo, unjar it somewhere innocuous. From that somewhere, run
> "java com.navtools.cosmdemo.single.BrowseTerrain". (You have to unjar it
> to
> put the images somewhere it can find them.)
>
> You can use the number pad controls as in Doom (make sure the numlock is
> on). You can also use page down/page up to rotate the view by 90 degrees
> down/up around the x axis. You can hop up/down 10 meters by pressing the
> u/d key. If you try to move while in the air, you will be popped back
> down
> to the terrain surface.
>
> One more thing: it takes a little while (less than a minute, though) to
> come
> up since it randomly generates terrain every time. It's supposed to load
> the previous terrain when you run it after the first time, but that bugs
> out
> (I think due to an error in JDK1.3 serialization). You _must delete
> HeightField.dat_ before each run of the demo after the first.
>
> Oh yeah, and my apologies for the crappy sky background. I have a better
> one, but it's 16 times as big and I figured I'd save some bytes.
>
> Anyway, as I said above: if anyone can confirm that this runs
> quickly/slowly
> on a hardware accelerated machine (bonus points for telling me why), or
> can
> tell me what I'm doing wrong with my clipping, I would be very grateful.
>
> Thanks in advance,
> Bobby
>
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