Re: [JAVA3D] What do you want/need from Java3D?

I get the idea: "I'd like Java3D to be completely open sourced, but really I want someone to be a steward of the codebase to make sure that there is a central "reference" implementation to work with. " My application is simply to build a Gibsonian cyberspace online. If Java3D can be good for that

Re: [JAVA3D] [OFF-TOPIC?] 3D Support on the move (laptops)

I am using a Compaq Evo N800v. It has a 64MB ATI Radeon 7500. Performs well using Java/Java3D and VRML. You need the latest release of java (1.4.1_2) as 1.4.1 has some problem with DirectX/Direct3D (and I in one bug report it may also be releated to the ATI drivers) - nasty problem causing the wh

Re: [JAVA3D] [JAVA 3D] Performance Issues and Flickering

Also if you are using a very large model you may get precision issues (many old threads on this) in which case: 1) using doubles instead of floats can help 2) reducing the difference between front an back clip distance can help chris Alessandro Borges wrote: Check-list: * use a good video card (G

Re: [JAVA3D] Help please with multi tesxturing

n account) based on the file type. At 27/01/2003 13:28:00, you wrote: Also, I am using j2sdk1.4.1-b21 and Java3d 1.3 chris chris Thorne wrote: Hi, I am trying to apply one texture with transparency over another. The base texture does not show through where the top

Re: [JAVA3D] Help please with multi tesxturing

Also, I am using j2sdk1.4.1-b21 and Java3d 1.3 chris chris Thorne wrote: Hi, I am trying to apply one texture with transparency over another. The base texture does not show through where the top texture has transparency. Here is the simple test code fragment I am using to test it. Anyone

[JAVA3D] Help please with multi tesxturing

Hi, I am trying to apply one texture with transparency over another. The base texture does not show through where the top texture has transparency. Here is the simple test code fragment I am using to test it. Anyone spot the problem? thanks, chris ... // Create appearance object for te

Re: [JAVA3D] texture coordinate set

geom. using texCoords and the secound using texCoords2. I hope this makes sense. Cheers, Brad chris Thorne wrote: Can someone please explain the meaning and use of texture coordinate set (texCoordSet) for geometry arrays (in particular a triangular strip array)? The java doc does not ex

[JAVA3D] texture coordinate set

Can someone please explain the meaning and use of texture coordinate set (texCoordSet) for geometry arrays (in particular a triangular strip array)? The java doc does not explain it. thanks, chris === To unsubscribe, send e

Re: [JAVA3D] Texture Loading/Choppy Frame Rates

Hi Alex, just looking through old emails because I am trying texturing of terrain models and saw your thread. How did you get the frame rate up to 30 fps? Also, do you know how to combine a texture with a more detailed texture on a triangle strip array? thanks, and happy new year :) , chris

Re: [JAVA3D] Technic for projecting any jpeg or gif map over a 3D surface made from a DTED heights map

Hi ,  just saw this old message. I am trying to do something similar with grid data using an indexed TriangleStripArray. Did you find a solution?  Mine is not working at the moment - I am trying to set texture coordinates and it just displays blank. Happy christmas and new year, chris Illar

Re: [JAVA3D] Advanced terrain texturing - help needed

r to unroll > smoothly. Perhaps we could have the alpha mask texture as by-ref and modify > it at runtime each frame by masking out the edges? > > Any thoughts or suggestions would be appreciated! > > David Yazel > > ==

Re: [JAVA3D] bad striped appearance

"Copps, Kevin D" wrote: > Sometimes I am getting this stripe appearance (see attachment) when I have > different colored (yellow and green in the picture) geometries behind one > another and the geometry in front is sufficiently thin. It is worse when the > distance from the geometry to the viewe

Re: [JAVA3D] Java3D 1.3Beta

> intended solely for the addressee(s) named. If you have received this > information in error, or are advised that you have been posted this Email by > accident, please notify the sender by return Email, do not redistribute it, > delete the Email and keep no copies. > > > ======

Re: [JAVA3D] CAVES-give me one on a PC

Hi Justin, I have not forgotten you. I had two other little offline tasks to do that were urgent - the second I will finish niext week. I think I am over half way through with the tiledterraindata stuff. Had to do more thinking/coding on the Rez side to make it fit. Chris > Well, I wouldn't c

Re: [JAVA3D] AW: [JAVA3D] Drastic framerate drop between 1600x1200 and1280x1024

The Dell and the Toshiba both have GeForce4 with different designations.  I am not sure if the are both MX versiosions.  The Dell is a 440 Go - so based on the MX440 as you say.  I expect the Toshiba is the same only the Dell has 64MB versus the Toshiba 32 a

Re: [JAVA3D] AW: [JAVA3D] Drastic framerate drop between 1600x1200 and1280x1024

gt; > body > > of the message "signoff JAVA3D-INTEREST". For general help, send > email to > > [EMAIL PROTECTED] and include in the body of the message "help". > > ÿ > To unsubscribe, send email to [EMAIL PROTECTED] and include in the

Re: [JAVA3D] Edge clamping in direct-x

Dave, are you talking about darkened edges around separate textured polygons/suraface or where two textures join on one surface? I tried to find out from Sun engineers at siggraph 2000 if the first was an issue in Java3D. I was encountering it in VRML and wanted to know if Java3D would have t

Re: [JAVA3D] Developing the Imposter

gt; the appropriate elements and update the terrain > model? > > Anybody have suggestions? > > Alex > > === > To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > of the message &q

Re: [JAVA3D] Help: installation of java 3d on a notebook

On some systems I had to run it twice to get the installAnywhere to work (e.g. on my athlon with win98). First time it would just hang with a blank dialog box and I had to kill it off. Second time no problems. Chris Wilson Wen wrote: > I jsut downloaded (twice) the java 3d for Windows > (.exe

Re: [JAVA3D] Scenegraph Culling

Hi Michael, I missed your reply and just saw it. I am very interested in terrain modelling myself and auto-generate all mine (usually from GIS height grids). I expect to be doing something along the line of what you are trying. I was hoping to go into some detail on this stuff with David before

Re: [JAVA3D] Scenegraph Culling

Hi Michael, FYI below is the info I gathered on culling for  the Performance Sutras (I'll have to do an update).. As to actual stats on *how* efficient it is I can't say. cheers, Chris LODS/Switches and culling Application Culling    1.Using the application to cull nodes at a gross level (e.g. u

Re: [JAVA3D] heightfield, 2D-matrix --> 3D coordinate system

To Thomas, Corysia, Quoc and those who were interested in the height field stuff: With regrads to the Rez distribution, there are a lot of example batch and config files so to save you a little trouble you can look at the Asci2J3D.bat, Asci2J3dConfig.txt files for an example of how to configure/r

Re: [JAVA3D] heightfield, 2D-matrix --> 3D coordinate system

Justin Couch wrote: > ChrisThorne wrote: > > > As promised I have put up some code that will translate height fields > > into tristrips. > > Beat you by a couple of hours Chris :) Just commited very similar code > to the j3d.org code repository, but only the low-level heightfield -> > image -> he

Re: [JAVA3D] [Q] Mouse-rotation around fixed arbitrary axis

So you want quaternions: where you specify a vector (axis) [X Y Z] and an angle W to rotate about the axis. I don't have this code (I'm sure a few on this list do) but you can look at: http://www.cs.berkeley.edu/~laura/cs184/quat/quaternion.html http://skal.planet-d.net/demo/matrixfaq.htm#Q45 Thi

Re: [JAVA3D] [Q] Mouse-rotation around fixed arbitrary axis

Arbitrary axis or arbitrary point in space *and* a specified axis? Chris Kynn Jones wrote: > I need to map mouse-dragging motions to rotations around an arbitrary > axis (not necessarily through the origin). Does anybody know where I > can find code (preferably some extension of MouseRotate or

Re: [JAVA3D] Explanation request

Will, Re the precision problem I was not able to run your applet from the link, maybe it was the firewall. Can you please try using doubles not floats for your calculations and transforms and let me know how it goes. Single precision floats only give you 'reasonable' accuracy for 6-9 decimal d

Re: [JAVA3D] Interpretation of depth buffer values

I would also like to get a related question answered: If I set the front and back clip distances, during the rendering process when the depth at each pixel for each polygon is calculated does the entire range of depth buffer values (e.g. from 0 to MaxDepth) get mapped to this range from frontClip

Re: [JAVA3D] Test program (fwd) for Grafic card question

  Desiree, I have only just started to look at this but a few initial comments come to mind. These points will not help (much) but could make a little difference in similar applications. My points are not about Z buffer (that comes later) but are with respect to accurate positioning of objects in

Re: [JAVA3D] How to get the topology from Geometry?

>From memory in the triangle trip array the first three vertices make up the first triangle. The next vetex makes a triangle using itself and the previous two vertices. and so on... Chris ---

[JAVA3D] re Cosm

Hi David, There doesn't seem to be a way of posting questions to the FAQ on Cosm. Or is this to be arbitrarily through the message boards (which don't seem to be too active - what you all got day jobs or something? :) ). Chris --

Re: [JAVA3D] Grafic card question

  Desiree, As some may have said, if the range of coordinate values is very large then the z buffer tearing can be noticeable because of insufficient floating point precision (as identified by Justin). I.E. if two surfaces are overlapping and only 0.1 apart but your terrain models have coordinate

[JAVA3D] j3f doco?

Can someone please point me to documentation on the j3f format and what tools can import/export it, thanks, Chris This Email may contain

Re: [JAVA3D] FOV and Occlusion culling

David, This was from Doug and Shawn some time ago.  It is a little paraphrased as I modify posts to suit my Java3D Performance Sutras document. Chris Automatic - Java3D Culling If a Group that contains  nodes and Shape3Ds has a Bounds that is not in the view frustum, then the entire sub-graph

Re: [JAVA3D] Bad performance of overlaying planes

Artur, It is a long time since I studied what is being done with hidden surface removal but, if your card is doing a simple scanline hidden surface removal then your program seems like a worst-case nightmare for it! If the algorithm sorts polygons into z order and they don't intersect (in z) the

Re: [JAVA3D] [java3d] transparency

  I can't help you with this but you should update the date on your computer - it is dated last year and I only found your message by accident :) Chirs PLUG wrote: Hi! I have problems with objects transparency with textures. Already 5 days. Below Uma Sabada has written working (like) program. B

Re: [JAVA3D] Performance Problem: Creating Scene Graph andRotationBy Mouse

FYI I have been scanning performance content on the list and building a performance perls document. I'll put it up on the web if anyone is interested. I think the comment from Kevin Rushforth is the reference you are after: SetTransform 1.The setTransform(Transform3D t) method of the Transfo

Re: [JAVA3D] Performance Problem: Creating Scene Graph and RotationBy Mouse

  Geoff, FYI, it runs at 1.4fps on a PIII700 notebook with ATI Rage Mobility AGP 2x, 8MB and 12fps on an Athlon 900, AGP 4x, Gforce II GTS 32MB When I reduce the divisions to 4 the notebook fps goes up to 5.5. Chris Geoff Morris wrote: Hi: I've attached example code that generates and displays

Re: [JAVA3D] Texture problems

Zak, The intersection problem - where there is tearing and flashing at the intersection of two surfaces as you move around - is something I am familiar with in VRML - looks like you have a similar problem in Java3d. If this is what is happening it could be due to the precision of the depth calcu

Re: [JAVA3D] Image capturing (creation of movie using successivelysaved JPEGsnapshots)

Hi Petros, Just a guess : it looks like you are trying to write to it too quickly - before it is finished the last render. If so then you could look at double buffering. However the fact it takes longer to crash if you stop rendering to other canvases seems to indicate the problem lies elsewher

[JAVA3D] test - please ignore

Just a test - I've been getting duplicate messages This Email may contain confidential and/or privileged information and is intended solely f

[JAVA3D] background texture performance question

  I posted this with an incorrect subject line - (abuse of the reply-to) sorry, Chris chris thorne wrote: There was once a performance question on background texturing and I did not see an answer that resoloved the problem or showed a fix - see my mini-thread below: " When using an

Re: [JAVA3D] DirectX problem??

There was once a performance question on background texturing and I did not see an answer that resoloved the problem or showed a fix - see my mini-thread below: " When using an image background performance is reduced considerably! It became so slow that I had to use a simplestar geometry backgrou

Re: [JAVA3D] Performance, LOD and optimization

Hi Dave, can you tell me what the results of your texture experimets were? What is the "straight line syndrome " you refer to? regards, Chris "Yazel, David J." wrote: 5. I think I have finallly found the right "combination" for large terrain in Java3d. I have experimented with lots of differ

Re: [JAVA3D] Texture Map performance hit?

Hi Bob, can you please let me know what responses you got from this message - I did not see any on the list, thanks, Chris   Bob Gray wrote:   I created a simple scene is which I have 2 torus shapes.  I added a behavior to wake up every so many milliseconds and move the 2 objects around.  I get *

Re: [JAVA3D] performance comparisons?

Hi, Did you get any response to this? thanks, Chris Andy Kriger wrote: > Are there any available performance comparisons of Java3D versus OpenGL > wrappers like Magician or GL4Java? I am interested in seeing the speed of > similar performance-intensive tasks using these different APIs. > > I