Available on macOS
Interface to a TRACKPixx3 device.
This component also exposes the functions of the DATAPixx3 device to which the TRACKPixx is connected. To use both the TRACKPixx and DATAPixx in an experiment, create a single TRACKPixx Device. To use the DATAPixx without the TRACKPixx, create a DATAPixx Device instead.
Distance from subject’s eyes to camera lens (in centimeters)
Camera lens type
Expected size of the subject’s iris in the camera image (in pixels)
MWorks will poll the device for new input data every
YES, the console monitor (i.e. the display connected to DATAPixx3 DisplayPort OUT2) will show the camera image and pupil center tracking positions in an overlay window
Brightness of the overlay window enabled by show_overlay. Must be an integer between 0 and 255 (inclusive).
Intensity of the infrared illuminator. Must be an integer between 0 and 8 (inclusive).
Eye velocity threshold below which to classify fixations (in eye position units per second)
Minimum number of consecutive samples required to classify a fixation event
Eye velocity threshold above which to classify saccades (in eye position units per second)
Minimum number of consecutive samples required to classify a saccade event
Variable in which to store time of sample (in seconds) on TRACKPixx clock
Variable in which to store Cartesian screen coordinate for x component of left eye
Variable in which to store Cartesian screen coordinate for y component of left eye
Variable in which to store diameter of left eye pupil
Variable in which to store Cartesian screen coordinate for x component of right eye
Variable in which to store Cartesian screen coordinate for y component of right eye
Variable in which to store diameter of right eye pupil
Variable in which to store left eye fixation state (true when fixating, false otherwise)
Variable in which to store right eye fixation state (true when fixating, false otherwise)
Variable in which to store left eye saccade state (true when in saccade, false otherwise)
Variable in which to store right eye saccade state (true when in saccade, false otherwise)
Variable in which to store pupil-to-corneal reflection vector x component for left eye
Variable in which to store pupil-to-corneal reflection vector y component for left eye
Variable in which to store pupil-to-corneal reflection vector x component for right eye
Variable in which to store pupil-to-corneal reflection vector y component for right eye
Variable in which to store the computed offset (in nanoseconds) between the device clock and MWorks’ clock.
The clock offset is recomputed once per second and is used to convert DATAPixx event and sample times to MWorks times. Use this parameter if you want a record of the computed clock offsets in your event file.
YES, the digital output port will be used to output the RGB value
of the first upper left pixel of the screen.
YES, the VSYNC signal will be output on bit 23 of the digital
This mode cannot be enabled if enable_dout_pixel_mode is set to
YES, digital input transitions are recognized only after the entire digital input bus has been stable for 80 nanoseconds
YES, after a digital input transitions, further transitions will be ignored for the next 30 milliseconds
YES, digital output bits are looped back to the corresponding digital input bits. This is useful primarily for testing the device.
Transitions on digital input bits 0-15 are logged to an on-device buffer and read by MWorks at the rate specified by update_interval. This parameter sets the maximum size (in number of events) of the buffer. If the buffer is too small, writes will “wrap”, and new events will overwrite old ones.
Interval between acquired samples on analog input channels (microseconds)
YES, analog outputs are looped back to analog inputs as follows:
DAC_DATA0 → ADC_DATA0/2/4/6/8/10/12/14
DAC_DATA1 → ADC_DATA1/3/5/7/9/11/13/15
DAC_DATA2 → ADC_REF0
DAC_DATA3 → ADC_REF1
This is useful primarily for testing the device.
YES, the device will start I/O automatically (as if by an
implicit Start IO Device action) when the experiment starts running.
Note: Device I/O will always stop automatically when the experiment stops running, irrespective of this setting.
Alternative device to use if this one fails to initialize (e.g. because the required hardware is not available). If
#allowAltFailover is set to 0 or false, this parameter is ignored.
Allowed at top level: