minor problem of GKS C interface

From: MASUDA (masuda@XXXXXX)
Date: Tue Jul 11 1995 - 03:47:29 MDT

We run NCAR Graphics 3.2 on SunOS 4 and 3.2.1 on DEC Alpha OSF/1.
When we tried to use C language interface of GKS,
we found that the function ginq_norm_tran (inquire normal
transformation, equivalent to GQNT in Fortran) did not work as expected.
The following patch to src/ncarg2d/src/libncarg_gksC/awic/s_gqnt.c
seems to work.

===== BEGIN s_gqnt.diff
--- s_gqnt.orig.c Mon Jun 26 17:47:47 1995
+++ s_gqnt.c Thu Jun 29 14:59:57 1995
@@ -2,7 +2,9 @@
  * $Id: s_gqnt.c.sed,v 1.3 1993/01/08 17:00:04 haley Exp $
  */
 /*
- * Inquire normalization transformation
+ * Inquire normalization transformation
+ *
+ * tentatively revised by K. Masuda (Tokyo Metro. Univ.), 1995-06-26
  */
 
 #include <ncarg/gks.h>
@@ -20,9 +22,16 @@
     Gtran *norm_tran;
 #endif
 {
- gqnt_(&num,err_ind,&norm_tran->win.x_min,&norm_tran->win.x_max,
- &norm_tran->win.y_min,&norm_tran->win.y_max,
- &norm_tran->vp.x_min, &norm_tran->vp.x_max,
- &norm_tran->vp.y_min, &norm_tran->vp.y_max);
+ Gfloat window[4], viewpt[4];
+
+ gqnt_(&num, err_ind, window, viewpt);
+ norm_tran->win.x_min = window[0];
+ norm_tran->win.x_max = window[1];
+ norm_tran->win.y_min = window[2];
+ norm_tran->win.y_max = window[3];
+ norm_tran->vp.x_min = viewpt[0];
+ norm_tran->vp.x_max = viewpt[1];
+ norm_tran->vp.y_min = viewpt[2];
+ norm_tran->vp.y_max = viewpt[3];
 
 }
===== END s_gqnt.diff 

--
Kooiti MASUDA
Dept. of Geography, Tokyo Metropolitan University
e-mail (internet): masuda@geog.metro-u.ac.jp

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