DdInqPickAperture(3D)

NAME
DdInqPickAperture - Return the pick aperture of a device

SYNOPSIS
C:
void DdInqPickAperture(device, aperture)
DtObject device;
DtSize3 *aperture;

FORTRAN:
CALL DDQPA(DEVICE, APRTUR)
INTEGER*4 DEVICE
REAL*8 APRTUR(3)

DESCRIPTION
DdInqPickAperture returns the pick aperture of a specified device, device, into the width, height, and depth fields of the supplied FORTRAN, the aperture is returned in an array>.

When a pick is initiated on a device (via DdPickObjs <DDPO>), a volume of space centered around the pick point is searched for drawable objects. The dimensions of that volume are defined by the device's pick aperture as specified by a width, a height, and a depth in device coordinates. The pick aperture is set by DdSetPickAperture <DDSPA>.

ERRORS
DdInqPickAperture will fail if passed an invalid device handle.

[WARNING - invalid device handle]

SEE ALSO
DdPickObjs(3D), DdSetPickAperture(3D)