BRL-CAD
quat.c
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1 /* Q U A T . C
2  * BRL-CAD
3  *
4  * Copyright (c) 2008-2014 United States Government as represented by
5  * the U.S. Army Research Laboratory.
6  *
7  * This library is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public License
9  * version 2.1 as published by the Free Software Foundation.
10  *
11  * This library is distributed in the hope that it will be useful, but
12  * WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this file; see the file named COPYING for more
18  * information.
19  */
20 /** @file libged/quat.c
21  *
22  * The quat command.
23  *
24  */
25 
26 #include "common.h"
27 
28 #include <stdlib.h>
29 #include <ctype.h>
30 #include <string.h>
31 
32 #include "./ged_private.h"
33 
34 
35 int
36 ged_quat(struct ged *gedp, int argc, const char *argv[])
37 {
38  quat_t quat;
39  double scan[4];
40  static const char *usage = "a b c d";
41 
44  GED_CHECK_ARGC_GT_0(gedp, argc, GED_ERROR);
45 
46  /* initialize result */
47  bu_vls_trunc(gedp->ged_result_str, 0);
48 
49  /* return Viewrot as a quaternion */
50  if (argc == 1) {
51  quat_mat2quat(quat, gedp->ged_gvp->gv_rotation);
52  bu_vls_printf(gedp->ged_result_str, "%.12g %.12g %.12g %.12g", V4ARGS(quat));
53  return GED_OK;
54  }
55 
56  if (argc != 5) {
57  bu_vls_printf(gedp->ged_result_str, "Usage: view %s %s", argv[0], usage);
58  return GED_ERROR;
59  }
60 
61  /* Set the view orientation given a quaternion */
62  if (sscanf(argv[1], "%lf", &scan[0]) != 1
63  || sscanf(argv[2], "%lf", &scan[1]) != 1
64  || sscanf(argv[3], "%lf", &scan[2]) != 1
65  || sscanf(argv[4], "%lf", &scan[3]) != 1)
66  {
67  bu_vls_printf(gedp->ged_result_str, "view %s: bad value detected - %s %s %s %s",
68  argv[0], argv[1], argv[2], argv[3], argv[4]);
69  return GED_ERROR;
70  }
71  HMOVE(quat, scan);
72 
73  quat_quat2mat(gedp->ged_gvp->gv_rotation, quat);
74  ged_view_update(gedp->ged_gvp);
75 
76  return GED_OK;
77 }
78 
79 
80 /*
81  * Local Variables:
82  * tab-width: 8
83  * mode: C
84  * indent-tabs-mode: t
85  * c-file-style: "stroustrup"
86  * End:
87  * ex: shiftwidth=4 tabstop=8
88  */
void usage(struct ged *gedp)
Definition: coil.c:315
#define GED_OK
Definition: ged.h:55
Definition: ged.h:338
void bu_vls_trunc(struct bu_vls *vp, int len)
Definition: vls.c:198
#define GED_CHECK_ARGC_GT_0(_gedp, _argc, _flags)
Definition: ged.h:202
int ged_quat(struct ged *gedp, int argc, const char *argv[])
Definition: quat.c:36
Header file for the BRL-CAD common definitions.
void ged_view_update(struct bview *gvp)
Definition: vutil.c:33
#define GED_ERROR
Definition: ged.h:61
struct bview * ged_gvp
Definition: ged.h:361
#define GED_CHECK_VIEW(_gedp, _flags)
Definition: ged.h:140
#define GED_CHECK_DATABASE_OPEN(_gedp, _flags)
Definition: ged.h:114
struct bu_vls * ged_result_str
Definition: ged.h:357
mat_t gv_rotation
Definition: bview.h:220
void bu_vls_printf(struct bu_vls *vls, const char *fmt,...) _BU_ATTR_PRINTF23
Definition: vls.c:694
void quat_quat2mat(mat_t mat, const quat_t quat)
Convert Quaternion to Matrix.
void quat_mat2quat(quat_t quat, const mat_t mat)
Quaternion math routines.