Thanks, Egon - good tip. Will consider, but first I have to tackle the issue of porting my main app to Win7 - see my post in the support section on memory issues. And then finding a way to export these structures to a standard 3D file format..

By the way, a modified version of this was used in a press conference by Chanel to support a launch of a new cosmetics product in middle of last year. This is supposed to improve the firmness of the skin by enhancing the structural elements of skin cells, which are believed to be based on the tensegrity principle. The application was used together with some physical models to show how this works to the journalists.

Hi, I am moving my application to my new Windows 7 64 bit system and have memory problems when using the HW renderer (sw rendering works fine). I am thinking this may have to do with 32bit libs. The error I am getting is after creating the HW FrameBuffer (which doesn't show anything except the background in the specified color):

Loading Texture...karoXY.jpg
Loading Texture...karoYZ.jpg
Loading Texture...karoXZ.jpg
Loading Texture...karobw.jpg
Loading Texture...envmap-alu.jpg
Java version is: 1.6.0_14
-> support for BufferedImage
Version helper for 1.2+ initialized!
-> using BufferedImage
Software renderer (OpenGL mode) initialized
Software renderer disposed
Using LWJGL's AWTGLCanvas
Adding Lightsource: 0
Driver is: RDPDD/null on NVIDIA Corporation / GeForce GT 220/PCI/SSE2
GL_ARB_texture_env_combine supported and used!
FBO supported and used!
OpenGL renderer initialized (using 4 texture stages)
Hardware supports textures up to 8192*8192 in size!
Additional visibility list (2) created with size: 4096
Additional visibility list (3) created with size: 4096
Additional visibility list (4) created with size: 4096
Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: Direct buffer memory
   at java.nio.Bits.reserveMemory(Bits.java:633)
   at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:95)
   at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:288)
   at com.threed.jpct.GLBase.convertTexture(Unknown Source)
   at com.threed.jpct.GLBase.setRenderTarget(Unknown Source)
   at com.threed.jpct.AWTGLRenderer.executeGL(Unknown Source)
   at com.threed.jpct.AWTJPCTCanvas.paintGL(Unknown Source)
   at org.lwjgl.opengl.AWTGLCanvas.paint(AWTGLCanvas.java:288)
   at org.lwjgl.opengl.AWTGLCanvas.update(AWTGLCanvas.java:317)
   at sun.awt.RepaintArea.updateComponent(RepaintArea.java:239)
   at sun.awt.RepaintArea.paint(RepaintArea.java:216)
   at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:306)
   at java.awt.Component.dispatchEventImpl(Component.java:4706)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

The code runs OK in my old Windows XP environment. Any suggestions of what I could do? (I am using  lwjgl 2.2.1 already)

thanks for the pointer to your code, that helped (I forgot to load a proper texture)

great, thanks - and even at the top!

Hi Egon,

I am using jDeveloper 11.1.1 and was not able to achieve the right settings. For the compiler, I selected version 1.5  in the JDK compatibility setting, but this still produces the incompatible class version exception when trying to run with a 1.5 JRE (in "Libraries and Classpath").
This is why I kept the old applet version online, as a fallback. But if this doesn`t work either, I have to go searching.... Any ideas?

Achim

PS: I found out that I touched the old applet with a java 1.6 compiler. So for the time I reverted to the really old applet (which apart from the old rendering has some features missing). So the fall back should work now.