emcGetBeamShift

NAME

emcGetBeamShift - Retrieve beam shift settings

#include "emc.h"
int emcGetBeamShift(EM *em, int units, double *x, double *y);

emcGetBeamShift() retrieves the current beam shift settings

*em

points to an EM control and communications structure that was returned by the emcOpen() call.

units

the units the values are expressed in:

`UNCALIBRATED_UNITS`	Native beam shift units of instrument
`ANGSTROM_UNITS`	Units are measured in angstroms
`NANOMETER_UNITS`	Units are measured in nanometers
`MICRON_UNITS`	Units are measured in microns
`PIXEL_UNITS`	Units are measured in pixels in current camera

*x

points where to store the current X beam shift value

*y

points where to store the current Y beam shift value

`EMC_OK` (0)	Success
`EMC_ERROR` (-1)	Error
`EMC_UNCALIBRATED` (-100)	Instrument not calibrated for given request
`EMC_BADUNITS` (-101)	Invalid units specified for this request

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