nVis SX/111 Display

[farshizzo]

It's difficult to tell what is going on without more information. There might be a high-poly object in your environment that is causing the framerate to drop when it comes into view. The only difference between the nvisorSX and nvisorSX111 commands is the field of view that is applied to the window. the nvisorSX111 has a larger FOV, so that means more objects are visible. If you bring up the onscreen frame stats, how many polygons/drawables does it report?

[kevin]

I was wrong about the SX setup function showing better results; running it again caused the same problem as the SX/111. There are no high poly objects in the scene; only a plane and a few cylinders.

We've realized that the problem may have something to do with the Intersense tracker. When we first start the tracking system, ISDemo shows a data transfer rate of about 85 kbps. As soon as Vizard connects using the intersense.dls plug-in, however, that data transfer rate drops to 16 kbps, and remains there unless we turn the Intersense system off and on again.

The Intersense version were using is an older IS-900 which connects via a serial port.

[Kaminski]

Are you running Vizard at the same time as ISDemo or IServer? That may be your problem -- we are also on an IS-900 and that was causing issues.

Also, have you tried the more recent 'intersense.dle' plugin instead?

[kevin]

Apparently Vizard is changing the mode of the tracker from 'Continuous' to 'Polled,' which is the cause of the lower data rate. Is there a way to keep this from happening?

[farshizzo]

The intersense plugin uses the official isense SDK to communicate with the devices. There doesn't appear to be any way to change the transmission mode between continuous and polled through the SDK. It appears the SDK defaults to polled for older serial-based devices.

I know the SDK supports specifying extra options through an INI config file. Maybe there is a special option for changing to continuous mode. You will need to contact Intersense about this though.

[karinp]

Originally Posted by kevin

Apparently Vizard is changing the mode of the tracker from 'Continuous' to 'Polled,' which is the cause of the lower data rate. Is there a way to keep this from happening?

Hi Kevin,

I'm having the same problem with Nvis SX111...did you solve it?

Cheers

Karin