BRL-CAD
eye_pos.c
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1 /* E Y E _ P O S . 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/eye_pos.c
21  *
22  * The eye_pos 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_eye_pos(struct ged *gedp, int argc, const char *argv[])
37 {
38  point_t eye_pos;
39  double scan[3];
40  static const char *usage = "x y z";
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  /* get eye position */
50  if (argc == 1) {
51  VSCALE(eye_pos, gedp->ged_gvp->gv_eye_pos, gedp->ged_wdbp->dbip->dbi_base2local);
52  bn_encode_vect(gedp->ged_result_str, eye_pos);
53  return GED_OK;
54  }
55 
56  if (argc != 2 && argc != 4) {
57  bu_vls_printf(gedp->ged_result_str, "Usage: %s %s", argv[0], usage);
58  return GED_ERROR;
59  }
60 
61  if (argc == 2) {
62  if (bn_decode_vect(eye_pos, argv[1]) != 3) {
63  bu_vls_printf(gedp->ged_result_str, "Usage: %s %s", argv[0], usage);
64  return GED_ERROR;
65  }
66  } else {
67  if (sscanf(argv[1], "%lf", &scan[X]) < 1) {
68  bu_vls_printf(gedp->ged_result_str, "ged_eye: bad X value %s\n", argv[1]);
69  return GED_ERROR;
70  }
71 
72  if (sscanf(argv[2], "%lf", &scan[Y]) < 1) {
73  bu_vls_printf(gedp->ged_result_str, "ged_eye: bad Y value %s\n", argv[2]);
74  return GED_ERROR;
75  }
76 
77  if (sscanf(argv[3], "%lf", &scan[Z]) < 1) {
78  bu_vls_printf(gedp->ged_result_str, "ged_eye: bad Z value %s\n", argv[3]);
79  return GED_ERROR;
80  }
81 
82  /* convert from double to fastf_t */
83  VMOVE(eye_pos, scan);
84  }
85 
86  VSCALE(gedp->ged_gvp->gv_eye_pos, eye_pos, gedp->ged_wdbp->dbip->dbi_local2base);
87 
88  /* update perspective matrix */
90 
91  ged_view_update(gedp->ged_gvp);
92 
93  return GED_OK;
94 }
95 
96 
97 /*
98  * Local Variables:
99  * tab-width: 8
100  * mode: C
101  * indent-tabs-mode: t
102  * c-file-style: "stroustrup"
103  * End:
104  * ex: shiftwidth=4 tabstop=8
105  */
void usage(struct ged *gedp)
Definition: coil.c:315
#define GED_OK
Definition: ged.h:55
mat_t gv_pmat
perspective matrix
Definition: bview.h:225
void bn_encode_vect(struct bu_vls *vp, const vect_t v)
Definition: ged.h:338
struct db_i * dbip
Definition: raytrace.h:1266
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
struct rt_wdb * ged_wdbp
Definition: ged.h:340
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
Definition: color.c:49
#define GED_CHECK_VIEW(_gedp, _flags)
Definition: ged.h:140
#define GED_CHECK_DATABASE_OPEN(_gedp, _flags)
Definition: ged.h:114
int bn_decode_vect(vect_t v, const char *str)
struct bu_vls * ged_result_str
Definition: ged.h:357
double dbi_base2local
unit conversion factors
Definition: raytrace.h:808
int ged_eye_pos(struct ged *gedp, int argc, const char *argv[])
Definition: eye_pos.c:36
void mike_persp_mat(fastf_t *pmat, const fastf_t *eye)
Definition: mat.c:1243
void bu_vls_printf(struct bu_vls *vls, const char *fmt,...) _BU_ATTR_PRINTF23
Definition: vls.c:694
vect_t gv_eye_pos
eye position
Definition: bview.h:216
Definition: color.c:51
double dbi_local2base
local2mm
Definition: raytrace.h:807
Definition: color.c:50