I have hundreds of (reasonably simple) objects in the scene, and rendering
was just fine until I pasted Text3D labels on all of 'em. So I wired in
a DistanceLOD on each Text3D to make it appear when you got close. (Also
a Billboard, looks cool, leaping into existence and swivelling around).
Work
I read today that the Sega dreamcast game box, which has frighteningly
high-performance 3d rendering, ships with a web browser, but not, alas,
with Java yet (apparently Planetweb only started building the browser
in May). Anyhow, consider J3D on a box like this... fun. -T.
==
I don't find anything in the API or the javadocs about thread-safety, which
is making me kind of nervous. I have a scene with keyboard navigation and
as the user moves around I want to splice things in front of him and remove
things behind him. (This capability is the maybe the strongest argumen
Dumb question: why can't you remove children just by passing in the Node
object, rather than having to know the index? I mean it's not hard to
write utility code to remove a child by ID, or to carry around
extra info about what indices the things you're interested in are at,
but the fact that the
Anyone have an example of a dashboard-style thing? I'm trying to add
status readouts to PlatformGeometry objects in the presence of a
KeyboardNavigator and having trouble producing any visible effect. -Tim
===
To unsubscribe
At 04:31 PM 9/22/99 -0400, Daniel Selman wrote:
>I have been developing a Java 3D scenegraph viewer for my book "Java 3D
>Programming". I have put quite a bit of time and effort into the tool
>[Java3DTree] and I feel that it will be generally useful to the Java 3D
>community.
For those of us who
I'm modeling an (effectively) infinitely large surface by cleverly
stitching things into the scene graph ahead of them and whipping them
out behind as the user moves around. Works OK, except the memory
usage seems to grow monotonically until after a couple minutes java
barfs on out-of-memory. OK
At 11:34 AM 9/24/99 -0400, Casteel, Don wrote:
>I've applied an appearance object to the QuadArray, but what I get is a
>single material layed over the box color.
>
>Is there any way to set up the material so it goes to the geometry and picks
>the ambient color from the surface which I can then sc
Sorry if this is FAQ, I've poked around the Sun site and tried the
plausible-sounding suggestion from Mitch Williams (reproduced below)
and failed to get j3d running in any browser on WinNT. Has anyone
actually done this or seen it done? Is there one working example
known to exist anywhere? I'v
The problem: you want to do something obvious like, say, texture mapping
or using specular color, and you find that neither the API spec nor the
javadoc nor the tutorial explain how. Yes, they enumerate the arguments and
give a one-line explanation, but nothing that actually outlines the concepts
I spent most of the weekend fighting this. Eventually I'll get around to
writing a real HOWTO, but maybe this will help some other folks out.
1. It can be done. I've run it under IE5 and Nav 4.61 on WinNT Workstation
and Win95. For now, I'm specializing on IE because the *right* way to
do this
At 09:44 AM 9/22/99 -0700, you wrote:
>I don't have any simple examples but the process is quite
>straightforward... ;-)
>
>Place all objects that you want to appear in display overlay (i.e. a
>HUD or dashboard) under the parent transform of the view you want them
>to appear in.
Since the rest of
The SimpleSound demo that comes with J3d has a complex setup where the
sound is enabled in a Behavior. I just wanted a simple background hum,
so did the following:
MediaContainer mc = new MediaContainer();
mc.setURL("url-of-my-.au-file");
BackgroundSound sound = new BackgroundSound(
Question: does setLoop() work? I have my BackgroundSound playing, but all
values of setLoop() are ignored. Hmm, I just went and recompiled
SimpleSounds.java in the demos and it seems like all values are ignored
there too. Is there some magic to getting Sound.setLoop() to work?
It seems like the
At 12:16 PM 10/7/99 -0400, Jaime Requena wrote:
>I'm wondering what kinds of problems Java 3D has
>with creating multiplayer games. Does Java 3D have good enough performance
>to do something like this?
With the current release, with current real-people-have-it hardware, no.
Presumably both the s
At 10:22 AM 10/11/99 +0400, Vladimir Olenin wrote:
>DG> Using either mm or m, you'll have to set up your view display your object
>DG> correctly. The examples are generally set up to display objects in the -1 -> 1
>DG> range around the origin.
>
>I wonder where i can set this range?
The idea is
At 09:59 AM 10/17/99 -0700, Dong-Woo Lee wrote:
>- UNCAUGHT EXCEPTION -
>javax.media.j3d.RestrictedAccessException: Group: only
>a BranchGroup node may be added
This is real easy to get. The way it happens to me is that I
I build a little piece of scene graph with a TransformGrou
At 10:54 AM 10/18/99 -0500, Andrew R. Thomas-Cramer wrote:
Thanks for the response! By thrashing, I mean the application is using near 100% of
CPU time, only when KeyNavigator is used.
Well, I subclassed KeyNavBehavior so I could do some stuff in the
processStimulus method to provide
Enough bugs have been fixed that if you now go download & install the
most recent Java 2 JRE & plugin, taking all the defaults, and you then go
download and install the most recent OpenGL J3d, taking all the defaults,
you can run J3D applets and they work! Belated applause to the J3d guys.
-Tim
At 12:46 PM 11/1/99 -0500, Casteel, Don wrote:
>Is it reasonable to assume I will see a significant improvement in speed if
>I take the time to convert everything that's double precision to float
>precision?
You'll suffer a significant *decrease* in the speed of writing your code
because of havin
At 12:44 PM 11/1/99 PST, you wrote:
>Probably very simple to most, but how do you create normals.
Use GeometryInfo and NormalGenerator. Look it up in either the
j3d demos or j3d tutorial examples directories. -Tim
===
To un
At 09:36 AM 11/2/99 -0500, Don Casteel wrote:
>I've been trying to implement the KeyNavigatorBehavior for the first time,
>and am going from the Java3D tutorial.
...
>Exception occurred during event dispatching:
>java.lang.UnsatisfiedLinkError: subclass
Look up the exception you got (Unsatisfied
At 08:31 AM 11/4/99 +1000, Olivier fillon wrote:
>I sometimes have a similar behaviour with my 2D text:
I've never got 2d text to render readably, it always looks terrible.
So I went to 3d text, a bit more work to set up, but it's always readable,
particularly if you put it in a billboard.
3d te
At 12:58 PM 11/6/99 -0500, you wrote:
>Hello everyone. I am attempting to attach a shape or an avatar to a
>ViewPlatform or ViewingPlatform (not sure which), so that as I move my
>position (using some basic MouseBehaviors I wrote), this object moves with
>the rest of the platform. (For those of
I have neat-looking haystack-y objects which use LineArray geometry. I'd like
to make some of them glow-y and others dim. Normally I'd use an emissiveColor
in a Material in an Appearance to achieve this effec, but it won't let
me set the Appearance on the Shape3D because I don't have normals. F
At 12:24 AM 11/12/99 -0500, wayne c deprince jr. wrote:
>ahoy all..
>maybe im missing something basic, but why does Locale have a
>Locale.removeBranchGroup(BranchGroup bg) method but Group doesn't have
>Group.removeChild(Node n) which allows you to remove a child without
>knowing its index in the
At 06:01 PM 11/15/99 -, Martin Baker wrote:
>Would anyone like to suggest the fastest code to load and array of floating
>point numbers, which does not allocate memory inside the loop, or use
>deprecated classes.
Obviously it helps if you know how many numbers you're going to get so
you don't
I want to modify KeyNavBehavior slightly, so I'm off reading
KeyNavigator.java from the utils source.
I suggest that it's bad coding practice for class member variables to
have names like "a". Other amusing variables are "dv", "dp", "mat",
and "nda" (oh, that's for the NonDisclosureAgreement).
I have a moderately big & complex j3d app which, like all such, is a
first-rate memory hog. I'm developing on a Win/NT 4.0 workstation (SP4)
box, 550 MHz with a good card and lotsa RAM, so performance is adequate :).
I run the app in a command-prompt (ie DOS command line) window, by typing
java
This NT problem that I posted about recently is getting stranger and
stranger. Now I have to reboot NT between every two runs of my app,
if I start it with "java arg arg arg arg arg" in a DOS window
Clue: it doesn't happen when running as an applet in IE5
Clue: NT Workstation 4.0 SP 4
Clue: it
At 01:54 PM 11/17/99 +0100, [EMAIL PROTECTED] wrote:
>I've taken Nvidias drivers (Viper 550
>WinNT4). They seemed to be faster and didn't get any memory problems. But
>shading was totally wrong :(
Urgh... how was it messed up? I kind of need shading. -Tim
===
At 11:48 AM 11/17/99 -, Andy Wilkinson wrote:
>>>Clue: Viper v770 32M video card
>
>I know several people who have had problems with memory leaks in a number of
>3D applications using a Viper video card. The problem appears to be
>connected with Diamond's drivers for the card as they have all
If I'm running in an applet, what are the sensible things to do, J3D-wise,
in the stop() and destroy() methods? In stop() presumably I want to
preserve my scene graph but tell all the J3D threads to stop running.
In particular things like KeyNavBehaviors with that are essentially polling.
Or will
At 09:30 AM 11/18/99 +0800, Justin Couch wrote:
>> In destroy(), I want to free up the scene graph - I guess doing
>> surgery on the SimpleUniverse() to detach my locales and viewing platform
>> is in order?
>The easiest thing to do is to take your Canvas3D and call startRender()
>and stopRender(
At 12:24 PM 11/23/99 -0500, David Charles Hirschfield wrote:
>I'm trying to do picking without extending PickMouseBehavior, but I
>haven't been able to get it to work.
>
>What I want to end up with is a method like:
>
>PickAt(x,y)
By a weird coincidence, I just finished getting this to work.
1.
In response to a user event, I want to jump from my j3d applet off to
another web page, i.e. mimic the effect of clicking on an in HTML.
I know how to do this in javascript, but I've never done it in an
applet, and came up empty after a quick tour of the Java 2 docs. Obviously
this must be possi
I stupidly wrote, 20 minutes into a javadoc search that turned out to
require 22 minutes:
>In response to a user event, I want to jump from my j3d applet off to
>another web page, i.e. mimic the effect of clicking on an in HTML.
Applet.getAppletContext();
==
Can I, from my mostly-J3D applet, find a way into the IE5 or NS4.x HTML
DOM so I can twiddle with stuff in the browser DHTML-style? -Tim
===
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
of the mess
At 08:14 PM 11/23/99 -0600, Adam Hill wrote:
>If you are using NS or IE and the Java Plugin, you will have to go
>through JSObject. JSObject is a finicky thing so it may or may not be
>problematic. You will have to plumb the depths of the Sun Java Plugin
>Page.
Yee-hah! it works... you can catch
At 08:46 AM 11/24/99 -0600, Adam Hill wrote:
>Could you run it in IE5 and let us know if it works? (or send a sample
>file we can test?)
Yeah, and if I don't write it up now I won't get around to it, so here goes.
Problem: based on some event in your J3D environment, which is running
in an apple
At 09:46 AM 11/29/99 -0800, Doug Gehringer wrote:
>> can someone point me to the formula such that:
>> given the 4 by 4 transform matrix, it calculates
>> the translation(x, y, z), rotation(x, y, z) and
>> the scale factor(x, y, z)?
>
>If you just want to get these values, see the Transform3D get(
At 04:05 PM 8/7/99 -0600, Steph wrote:
>I am in desperate need of help. I have written an application that
>creates a 3D bar chart. Now I want to save that to a .tif file.
I hesitate to suggest this, but if you don't need to do this a *lot*,
and you're on Windows, you can just it alt-PrintScree
From: Brett Porter <[EMAIL PROTECTED]>
> Also, as I move nearer or further away from a surface using
> KeyNavigatorBehavior, the texture jumps up and down a little.
I see this too, but the surface is not textured, so I don't think the
problem is texture-related.
-Tim
=
At 04:56 PM 1/10/00 +0100, Martijn Vastenburg wrote:
>If however you want to do several rotations at once, e.g. roll/pitch/yaw for
>an aircraft, you should use the
>Transform3D.setEuler(Vector3d) method.
er, why? The rotx/y/z method is a lot easier to understand. -Tim
==
At 10:26 PM 1/11/00 -0800, John A. Tenney wrote:
>I've looked, and haven't seen it. I've had such problems with memory leaks
>and poor performance when objects are added and removed from the scene, that
>I've been hoping for an update soon. Anybody have an idea when it will be
>available?
What he
At 08:45 AM 1/21/00 -, Daniel Selman wrote:
>I have attached a simple example that is no longer texture mapped on my
>system by default. Allen McPherson kindly suggested that I set the flag:
>j3d.sharedctx=false
er, "set the flag". Where... on the command line.. on the
VirtualUniverse object
At 09:40 AM 1/24/00 -0800, Doug Gehringer wrote:
>You want to make sure that
>
>back clip distance / front clip distance
>
>Is > 1000 or you can loose depth buffer resolution.
Er, should that be "<"?
===
To unsubscri
At 04:23 PM 1/25/00 -, Andrew Phelps wrote:
>Can anyone recommend a good IDE which allows good debugging of Java 2 and
>Java3D?
Real Programmers (tm) debug with System.err.println()
Trying to get the combination of j3d and the visual stuff working together
is IMHO not cost-effective. And I'
While we're talking about sound isses: I have a J3D app that uses a looped
background sound for ambient rumble. If the app crashes, or if it gets
real slow, I usually end up locking-up the sound card (SBLive on NT4) and
there's nothing I can do to get sound back but reboot. Is this a common
expe
At 11:38 AM 2/4/00 -0600, Steve Pietrowicz wrote:
>Since I'm in the process of rewriting this (and other) sections of the Java 3D
>FAQ, I want to know what other peoples *recent* experiences have been with
>running Java 3D in a browser.
I can confirm that with the current versions, if you downlo
At 12:53 PM 2/5/00 +0200, Rayan Jreije wrote:
>It is obvious that IndexedGeometryArrays consume less memory than
>GeometryArrays.
>How about Rendering Speed?Are IndexedGeometryArray in general slower to
>render than GeometryArrays?
>On the other hand, are TriangularArrays faster to render than Qu
At 11:35 PM 2/16/00 -0600, Evan Drumwright wrote:
>Just a quick note to those using the Diamond 770 Ultra- by using NVidia's
>TNT2 drivers rather than Diamond's drivers, the frame rate increased by 66%
>on my Java 3D app! This is not a fluke- I had similar results on a machine
>with the same grap
At 01:49 PM 3/15/00 PST, Carlos Proal wrote:
>I have read and apparently Billboard behaviour does the trick,
>anyone have examples about this or have ideas of how to solve my
>problem.
Billboard's a little tricky but I got it to work; I seem to recall that
the tutorial had good explanation. I se
>From: Hugh Fisher [mailto:[EMAIL PROTECTED]]
>BUG: Java3D rotations are expressed in the internal
>format of radians rather than degrees.
SOLUTION: static final public double sDegree = Math.PI / 180.0;
-Tim
===
To unsubs
At 12:14 PM 3/29/00 +0930, Andrew Fellows wrote:
>I can not believe how seriously this topic is being treated. In my opinion,
>anyone who needs to use physical models, understand and use mathemtical
>concepts such as rotation and translation should understand the need for
>radians, degrees is eye
I've had a problem for the longest time [you can see it back in the archives]
where my J3D app would intermittently just fail to run, apparently locking
up somewhere down in the video driver, rebooting Windows NT would fix it;
also running it as an applet under IE5 would work. Go figure. It was
So, I've got a j3d app that runs too slow. So I want to profile it; I've
tried a couple of permutations of
java -Xrunprof:yadda-yadda MyApp
but the output isn't very interesting. Any good hints? -Tim
===
To unsubscribe, s
I wrote:
>So, I've got a j3d app that runs too slow. So I want to profile it; I've
>tried a couple of permutations of
It runs beautifully and quite fast as an app. As an applet under IE5 it
runs *totally* slow, and the task manager shows 98% idle time, and this
is during time when it's doing J
At 01:15 PM 4/7/00 -0700, John A. Tenney wrote:
>What is the best way to do this? I'd like lines to be located on arbitrary
>spacings on a floor. Should this be done using textures?
I used a couple of QuadArrays, one for the floor, the other for the grid.
Worked OK. -T.
=
At 10:58 AM 4/10/00 -0700, Philip Taylor wrote:
>no.
>
>these are separate issues.
Just a thank-you to Mr. Taylor for wading in with a clear, unambiguous,
timely and and smoke-free answer. If more vendors would do this... -T.
=
ls and contact info, check out http://antarcti.ca and follow
the "We're hiring!" link.
Cheers, Tim Bray, Antarcti.ca Systems Inc.
===
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
of the me
61 matches
Mail list logo
