wcs?

List of:	Scheme Extensions
Subjects:	Work Coordinate Systems
Contents:	Kernel

Action:

Determines if a Scheme object is a WCS.

Filename:

kern/kern_scm/wcs_scm.cxx

Syntax:

(wcs? object)

Arg Types:

object

scheme-object

Returns:

boolean

Description:

This extension returns #t if the specified object is a WCS entity; otherwise, it returns #f.

object specifies the scheme-object that has to be queried for a wcs.

Example:

; wcs?

; Create a wcs.

(define wcs1 (wcs (position 0 0 0) (gvector 0 -1 0)

(gvector 1 0 0)))

;; wcs1

; Determine if the WCS is actually a WCS.

(wcs? wcs1)

;; #t

PDF/KERN/15SCR.PDF
HTM/DATA/KERN/KERN/15SCR/0061.HTM