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SPAkern Global Function wcs_x_axis

SPAunit_vector wcs_x_axis(

)

Gets the x-axis of the active WCS.

Role: When there is no active WCS, the default is model space, and a one-to-one mapping occurs; therefore, verification that the active WCS is not NULL is unnecessary.

Effect: Read-only

This object is included in the file: wcs_utl.hxx