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Action:
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Gets the
x-direction of the active coordinate system.
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Filename:
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kern/kern_scm/wcs_scm.cxx
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Syntax:
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(wcs:x-axis [wcs])
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Arg Types:
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wcs
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wcs
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Returns:
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gvector
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wcs is an optional argument that specifies the WCS to search. If
wcs is not specified, the active WCS is used.
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Example:
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; wcs:x-axis
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; Find the x-direction of the current WCS.
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(wcs:x-axis)
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;; #[gvector 1 0 0]
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; Define a new WCS.
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(define wcs1 (wcs (position 10 10 10)
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(position 10 0 0) (position 0 10 0)))
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;; wcs1
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; Get the x-direction of the new WCS.
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(wcs:x-axis wcs1)
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;; #[gvector 0 -0.707106781186548
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;; -0.707106781186548]
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; Define WCS wcs3.
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(define wcs13 (wcs (position 3 2 1) (gvector 0 1 0)
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(position 1 0 0)))
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;; wcs13
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; Find the x-direction of WCS wcs3.
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(wcs:x-axis wcs13)
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;; #[gvector 0 1 0]
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