emcSetGridAlignments

NAME

emcSetGridAlignments - Define the current alignment of the specimen grid

SYNOPSIS

#include "emc.h"
int emcSetGridAlignments(EM *em, int x0, int y0, double theta, double delta);

DESCRIPTION

emcSetGridAlignments() defines the current orientation of the specimen grid. This function will typically be called by an application which guides the EM operator through the specimen loading process. One of the tasks in this process is identifying the grid origin (x0,y0), angle of rotation (theta), distance between grid squares (delta). The procedure generally involves identifying the origin grid square and the logical (1,1) grid square.

*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 goniometer positioning units
ANGSTOM_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

x0

X-axis position of logical origin of specimen grid

y0

Y-axis position of logical origin of specimen grid

theta

Angle of rotation (in radians)

delta

Distance to adjacent grid square

DIAGNOSTICS

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