BRL-CAD
obj_curve.c
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1 /* O B J _ C U R V E . C
2  * BRL-CAD
3  *
4  * Copyright (c) 2010-2014 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 
21 #include "common.h"
22 
23 #include "raytrace.h"
24 
25 
26 int
27 rt_obj_curve(struct curvature *cvp, struct hit *hitp, struct soltab *stp)
28 {
29  int id;
30  const struct rt_functab *ft;
31 
32  if (!cvp || !stp)
33  return -1;
34 
35  if (hitp) RT_CK_HIT(hitp);
36  RT_CK_SOLTAB(stp);
37 
38  id = stp->st_id;
39  if (id < 0)
40  return -2;
41 
42  ft = &OBJ[id];
43  if (!ft)
44  return -3;
45  if (!ft->ft_curve)
46  return -4;
47 
48  ft->ft_curve(cvp, hitp, stp);
49  return 0;
50 }
51 
52 
53 /*
54  * Local Variables:
55  * mode: C
56  * tab-width: 8
57  * indent-tabs-mode: t
58  * c-file-style: "stroustrup"
59  * End:
60  * ex: shiftwidth=4 tabstop=8
61  */
Definition: raytrace.h:248
int rt_obj_curve(struct curvature *cvp, struct hit *hitp, struct soltab *stp)
Definition: obj_curve.c:27
Header file for the BRL-CAD common definitions.
#define RT_CK_HIT(_p)
Definition: raytrace.h:259
void(* ft_curve)(struct curvature *cvp, struct hit *hitp, struct soltab *stp)
Definition: raytrace.h:2085
const struct rt_functab OBJ[]
Definition: table.c:159
#define RT_CK_SOLTAB(_p)
Definition: raytrace.h:453
int st_id
Solid ident.
Definition: raytrace.h:431