BRL-CAD
view2grid_lu.c
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1 /* V I E W 2 G R I D _ L U . 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/view2grid_lu.c
21  *
22  * The view2grid_lu 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_view2grid_lu(struct ged *gedp, int argc, const char *argv[])
37 {
38  /* intentionally double for scan */
39  double view_pt[3];
40 
41  fastf_t f;
42  point_t model_pt;
43  point_t mo_view_pt; /* model origin in view space */
44  point_t diff;
45  static const char *usage = "x y z";
46 
49  GED_CHECK_ARGC_GT_0(gedp, argc, GED_ERROR);
50 
51  /* initialize result */
52  bu_vls_trunc(gedp->ged_result_str, 0);
53 
54  if (argc != 4)
55  goto bad;
56 
57  if (sscanf(argv[1], "%lf", &view_pt[X]) != 1 ||
58  sscanf(argv[2], "%lf", &view_pt[Y]) != 1 ||
59  sscanf(argv[3], "%lf", &view_pt[Z]) != 1)
60  goto bad;
61 
62 
63  VSETALL(model_pt, 0.0);
64  MAT4X3PNT(mo_view_pt, gedp->ged_gvp->gv_model2view, model_pt);
65  f = gedp->ged_gvp->gv_scale * gedp->ged_wdbp->dbip->dbi_base2local;
66  VSCALE(mo_view_pt, mo_view_pt, f);
67  VSUB2(diff, view_pt, mo_view_pt);
68 
69  bu_vls_printf(gedp->ged_result_str, "%.15e %.15e", diff[X], diff[Y]);
70 
71  return GED_OK;
72 
73 bad:
74  bu_vls_printf(gedp->ged_result_str, "Usage: %s %s", argv[0], usage);
75  return GED_ERROR;
76 }
77 
78 
79 /*
80  * Local Variables:
81  * tab-width: 8
82  * mode: C
83  * indent-tabs-mode: t
84  * c-file-style: "stroustrup"
85  * End:
86  * ex: shiftwidth=4 tabstop=8
87  */
void usage(struct ged *gedp)
Definition: coil.c:315
#define GED_OK
Definition: ged.h:55
int ged_view2grid_lu(struct ged *gedp, int argc, const char *argv[])
Definition: view2grid_lu.c:36
Definition: ged.h:338
struct db_i * dbip
Definition: raytrace.h:1266
#define VSETALL(a, s)
Definition: color.c:54
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.
#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
fastf_t gv_scale
Definition: bview.h:211
struct bu_vls * ged_result_str
Definition: ged.h:357
double dbi_base2local
unit conversion factors
Definition: raytrace.h:808
mat_t gv_model2view
Definition: bview.h:222
void bu_vls_printf(struct bu_vls *vls, const char *fmt,...) _BU_ATTR_PRINTF23
Definition: vls.c:694
Definition: color.c:51
double fastf_t
Definition: defines.h:300
Definition: color.c:50