Initial commit

1 files changed, 32 insertions, 0 deletions

diff --git a/sys/mwcs/gen/mwv1tranr.x b/sys/mwcs/gen/mwv1tranr.x
new file mode 100644
index 00000000..045f6a33
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+++ b/sys/mwcs/gen/mwv1tranr.x
@@ -0,0 +1,32 @@
+include	"../mwcs.h"
+
+# MW_V1TRAN -- Optimized 1D coordinate transformation for an array of points.
+
+procedure mw_v1tranr (a_ct, x1, x2, npts)
+
+pointer	a_ct			#I pointer to CTRAN descriptor
+real	x1[ARB]			#I coordinates in input system
+real	x2[ARB]			#O coordinates in output system
+int	npts
+
+int	i
+pointer	ct
+real	scale, offset
+errchk	mw_ctranr
+
+begin
+	# Get real or double version of descriptor.
+	ct = CT_R(a_ct)
+
+	scale  = Memr[CT_LTM(ct)]
+	offset = Memr[CT_LTV(ct)]
+
+	# Perform the transformation; case LNR is a simple linear transform.
+	if (CT_TYPE(ct) == LNR) {
+	    do i = 1, npts
+		x2[i] = scale * x1[i] + offset
+	} else {
+	    do i = 1, npts
+		call mw_ctranr (a_ct, x1[i], x2[i], 1)
+	}
+end