1 files changed, 47 insertions, 0 deletions
diff --git a/sys/mwcs/mwswtermd.x b/sys/mwcs/mwswtermd.x
new file mode 100644
index 00000000..0e392dc4
--- /dev/null
+++ b/sys/mwcs/mwswtermd.x
@@ -0,0 +1,47 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<syserr.h>
+include	"mwcs.h"
+
+# MW_SWTERMD -- Set the linear part of the Wterm, i.e., the physical and world
+# coordinates of the reference point and the CD matrix.  It is the Wterm of
+# the current default WCS which is affected.
+
+procedure mw_swtermd (mw, r, w, cd, ndim)
+
+pointer	mw			#I pointer to MWCS descriptor
+double	r[ndim]			#I physical coordinates of reference point
+double	w[ndim]			#I world coordinates of reference point
+double	cd[ndim,ndim]		#I CD matrix
+int	ndim			#I dimension of Wterm
+
+pointer	wp
+pointer	mw_allocd()
+errchk	mw_allocd, syserrs
+string	s_name "mw_swtermd"
+
+begin
+	# Get the current WCS.
+	wp = MI_WCS(mw)
+	if (wp == NULL)
+	    call syserrs (SYS_MWNOWCS, s_name)
+
+	# Verify the dimension.
+	if (WCS_NDIM(wp) != ndim)
+	    call syserrs (SYS_MWNDIM, s_name)
+
+	# Copy in the data.  Cobber the old data if the Wterm has been set,
+	# otherwise allocate space in the global data area.
+
+	if (WCS_R(wp) == NULL)
+	    WCS_R(wp) = mw_allocd (mw, ndim)
+	call amovd (r, D(mw,WCS_R(wp)), ndim)
+
+	if (WCS_W(wp) == NULL)
+	    WCS_W(wp) = mw_allocd (mw, ndim)
+	call amovd (w, D(mw,WCS_W(wp)), ndim)
+
+	if (WCS_CD(wp) == NULL)
+	    WCS_CD(wp) = mw_allocd (mw, ndim*ndim)
+	call amovd (cd, D(mw,WCS_CD(wp)), ndim*ndim)
+end