Roy Ladner wrote:
> Just curious about platform and version of Java3D that you're using. Also, are
> you using the DDR or SDR GeForce? I'm thinking about getting this for a Java3D
> app under Windows 98 that has to deal with lots of geometry.
Java 1.3
Java3D 1.1.3 and Java3D 1.2beta1
SDR had been amazing, DDR should be even more...
My experience with JDK1.3 and Java3D 1.1.3 has been very close to native OpenGL
apps for complex scenes IF you geometry was built well i.e. appropriate
TriStripping, Appearance sharing etc. This is as expected in OpenGL apps as well,
that is to say, if it's good for OpenGL, it's good for Java3D.
At Full Sail, we teach two 3D programming classes. The first on uses a Java3D
engine that students access in C++ via the JNI. The second is pure OpenGL. The
difference in performance for our game level 3D models (low polys counts,
reasonable texture sizes)
is negligible. (really!)
Also, we have a 3D modeling class which uses Java3D as the visualization system.
Our tests for higher polygon models (>10,000) has beaten our SGI Onyx2 using
native code - Performer and OpenGL (it is an old machine I know, but it was our
previous benchmark)
One test machine uses the 3D Prophet GeForce 256 SDR card, dual 733 MHz PIII, 133
bus, 768M. Quite a beefy machine, but the graphics card is $269.00.
Another machine uses the same card, but is a PII 300 MHz with 64M and runs pure
graphics about 30% slower. The graphics card makes the machine - for graphics
apps. As a matter of fact, we are upgrading our entire workstation lab to use
GeForce hardware because it ran all of our test apps better than anything else we
could get our hands on - HP FX6, 3dfx, SGI cobalt, Intense3D, 3dLabs... A damn
game card beat all these guys workstation cards!
In Java3D we have an example terrain that is 79,202 polygons running at 25 Hz full
screen 1600x1200, shaded and moving. That's ~2,000,000 REAL polys/sec. Your
mileage may vary.
--
__________________________________________________________
Shawn Kendall Full Sail Real World Education
Course Director 3300 University BLVD
Real Time 3D for Gaming Winter Park FL 32792
[EMAIL PROTECTED] http://www.fullsail.com
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