Frame (Container is an abstract class, so use one of its derived classes)
|
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Canvas3D
Canvas3D
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SimpleUniverse
SimpleUniverse
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TransformGroup (left/right eye offset)
(BranchGroup)scene
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(BranchGroup)scene
Hope this helps.
Guillermo Gutierrez
Software Engineer, IR&D
Harris Corporation
Alejandro Terrazas wrote:
Hi-I am but a lowly brain scientist trying to use Java3D and VRML to study spatial
cognition. Please be patient with my ignorance! Let me say that the technical
expertise on this forum is quite impressive. I have two problems that
I need to address. First a little background might help.Background:
I am looking at brain activity using brain imaging while subjects navigate
in VR environments. In experiments that I have done in rats, the neurons
in the hippocampus (a region of brain tissue important for spatial memory) were
modulated by starting and stopping goal directed trajectories. This may prove
important to understanding how subjects learn about specific locations in real
and VR space.In humans, I am restricted to using functional magnetic resonance imaging to
measure brain activity. I want to have the human push a start/stop button to
navigate fixed trajectories through the environment. As long as the button
is being held down, the subject moves along the path (usually a circle). This
is exactly what the rats did in my earlier experiments. So far, I have been
able to load a VRML environment into a Java frame.Does anyone have some examples of using the PositionPathInterpolator to
move along a trajectory? I could not find any on the web.Because MRI uses huge magnet, all user interface stuff is limited. We have
access to goggles that will project separate video signals
to each eye such that stereoscopic views of the environment are possible.
Would anyone have suggestions how to get dual vga out? There is a card on the
market called the Tridium that has two vga's out so that two monitors can act as
one huge monitor. I have done 3D static images by pasting together two
stereoviews side by side and sticking each vga out into the monitor of each
of the subjects eyes. Something like this might be possible with Java3D but I
wondering if anyone has suggestions or a neat trick to do this.Finally, if there are any manufacturers out there who would like to contribute
their equipment to this research, we would be grateful. I will be looking at
various neurophysiological signals in humans and animals during
VR experience (for example, using VR GUIs, 3D vs. 2D experience, etc.).
Sensors, goggles, vestibular stimulators, and other equipment would all be
welcome.Thanks for any help.
Alex Terrazas
Research Fellow
National Institute of Mental Health
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