Getting Input from Devices

Getting Input from Devices
Prev	Chapter 5. Porting to VR Juggler from the CAVElib	Next

Getting input from the hardware devices is conceptually the same, but the implementations are quite different between the CAVElib™ software and VR Juggler.

In CAVElib™

To get tracking information, the following functions are used:

CAVEGetPosition(id, pos)
CAVEGetOrientation(id, orient)
CAVEGetVector(id, vec)
CAVEGetSensorPosition(sensor, coords, pos)
CAVEGetSensorOrientation(sensor, coords, orient)
CAVEGetSensorVector(sensor, id, vec)

For button input, the following macros are used:

CAVEBUTTON1, CAVEBUTTON2, CAVEBUTTON3, CAVEBUTTON4, CAVE_JOYSTICK_X, and CAVE_JOYSTICK_Y
CAVEButtonChange()

In VR Juggler

To get device input, use the classes derived from gadget::DeviceInterface. They include the following:

gadget::PositionInterface (for trackers and other positional devices)
gadget::DigitalInterface (for buttons and other on/off devices)
gadget::AnalogInterface (for potentiometers and other multi-range data devices)

For more information about the VR Juggler device interfaces, refer to Chapter 3, Helper Classes. A tutorial on getting device input in VR Juggler applications can be found in the section called “Getting Input”.