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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demo.jar
