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root/radiance/ray/src/hd/rhdobj.h
Revision: 3.7
Committed: Mon Jul 14 22:24:00 2003 UTC (21 years, 4 months ago) by schorsch
Content type: text/plain
Branch: MAIN
Changes since 3.6: +13 -1 lines
Log Message:
Instrumented headers against multiple inclusion and for use from C++.
Moved includes in headers out of "C" scope.

File Contents

# Content
1 /* RCSid: $Id: rhdobj.h,v 3.6 2003/02/22 02:07:24 greg Exp $ */
2 /*
3 * Header file for object display routines for rholo drivers.
4 */
5 #ifndef _RAD_RHDOBJ_H_
6 #define _RAD_RHDOBJ_H_
7
8 #ifdef __cplusplus
9 extern "C" {
10 #endif
11
12 /* additional user commands */
13 #define DO_LOAD 0 /* load octree object */
14 #define DO_UNLOAD 1 /* unload (free) octree object */
15 #define DO_XFORM 2 /* set/print object transform */
16 #define DO_MOVE 3 /* add to object transform */
17 #define DO_UNMOVE 4 /* undo last transform change */
18 #define DO_DUP 5 /* duplicate object */
19 #define DO_SHOW 6 /* show object (low quality) */
20 #define DO_LIGHT 7 /* illuminate object (high quality) */
21 #define DO_HIDE 8 /* hide object */
22 #define DO_OBJECT 9 /* print object statistics */
23
24 #define DO_NCMDS 10 /* number of object display commands */
25
26 /* commands entered on stdin only */
27 #define DO_INIT {"load","clear","xform","move","unmove","dup",\
28 "show","light","hide","object"}
29
30 /*******************************************************************
31 * The following routines are available for calling from the driver:
32
33 int
34 (*dobj_lightsamp)(c, p, v) : apply next sample for local light sources
35 COLR c; : pixel color (RGBE)
36 FVECT p; : world intersection point
37 FVECT v; : ray direction vector
38
39 If the pointer to the function dobj_lightsamp is non-NULL, then the
40 dev_value() driver routine should call this rather than use a
41 given sample in its own data structures. This pointer is set
42 in the dobj_lighting() function described below, which may be
43 called indirectly by the dobj_command() function.
44
45
46 int
47 dobj_command(cmd, args) : check/run object display command
48 char *cmd, *args; : command name and argument string
49
50 Check to see if this is an object display command, and return -1 if
51 it isn't. If it is a valid command that results in some visible
52 change, return non-zero, otherwise return 0. Error messages should
53 be printed with error(COMMAND,err).
54
55
56 double
57 dobj_trace(nm, rorg, rdir) : check for ray intersection with objects
58 char nm[]; : object name (modified)
59 FVECT rorg, rdir; : ray origin and direction
60
61 Check to see if the given ray intersects the given object,
62 returning the distance the ray traveled if it did, or FHUGE if it didn't.
63 If nm contains "*", then all visible objects are checked and the name
64 of the intersected object is returned, or "" if none. If nm is NULL,
65 then all visible objects are checked, but the name is not returned.
66
67
68 int
69 dobj_render() : render visible objects to OpenGL
70
71 Renders all display objects using OpenGL, assuming desired view has
72 been set. This routine also assumes that the tone-mapping library
73 is being used to set exposure, and it queries this information to
74 adjust light sources as necessary for illuminated objects. Returns
75 the number of objects rendered.
76
77
78 void
79 dobj_cleanup() : clean up data structures
80
81 Frees all allocated data structures and objects.
82
83
84 ++++ The following routines are usually called through dobj_command() ++++
85
86
87 int
88 dobj_load(oct, nam) : create/load an octree object
89 char *oct, *nam; : octree and object name
90
91 Load an octree for rendering as a local object, giving it the indicated name.
92 Returns 1 on success, 0 on failure (with COMMAND error message).
93
94
95 int
96 dobj_unload(nam) : free the named object
97 char *nam; : object name
98
99 Free all memory associated with the named object.
100 Returns 1 on success, 0 on failure (with COMMAND error message).
101
102
103 int
104 dobj_xform(nam, add, ac, av) : set/add transform for nam
105 char *nam; : object name
106 int add; : add to transform or create new one?
107 int ac; : transform argument count
108 char *av[]; : transform arguments
109
110 Set or add to the transform for the named object.
111 Returns 1 on success, 0 on failure (with COMMAND error message).
112
113
114 int
115 dobj_unmove() : undo last transform change
116
117 Undo the last transform change.
118 Returns 1 on success, 0 on failure (with COMMAND error message).
119
120
121 int
122 dobj_dup(oldnm, nam) : duplicate object oldnm as nam
123 char *oldnm, *nam;
124
125 Duplicate the named object and give the copy a new name.
126 Returns 1 on success, 0 on failure (with COMMAND error message).
127
128
129 int
130 dobj_lighting(nam, cn) : set up lighting for display object
131 char *nam; : object name
132 int cn; : new drawing code
133
134 Set the lighting of the named object to DO_SHOW, DO_HIDE or DO_LIGHT.
135 Change lighting of all objects if nam is "*".
136 Returns 1 on success, 0 on failure (with COMMAND error message).
137
138
139 int
140 dobj_putstats(nam, fp) : print object statistics
141 char *nam; : object name
142 FILE *fp; : output file
143
144 Print current position, size and transform for the named object,
145 or all objects if nam is "*".
146 Returns 1 on success, 0 on failure (with COMMAND error message).
147
148
149 ******************************************************************/
150
151
152 extern double dobj_trace();
153
154 extern char rhdcmd[DO_NCMDS][8];
155
156 extern int (*dobj_lightsamp)(); /* pointer to function to get lights */
157
158 #ifdef __cplusplus
159 }
160 #endif
161 #endif /* _RAD_RHDOBJ_H_ */
162