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root/radiance/ray/src/hd/rhdobj.h
Revision: 3.4
Committed: Fri Dec 18 11:06:46 1998 UTC (25 years, 11 months ago) by gwlarson
Content type: text/plain
Branch: MAIN
Changes since 3.3: +3 -2 lines
Log Message:
changed dobj_render() to return the number of objects rendered

File Contents

# User Rev Content
1 gwlarson 3.1 /* Copyright (c) 1998 Silicon Graphics, Inc. */
2    
3     /* SCCSid "$SunId$ SGI" */
4    
5     /*
6     * Header file for object display routines for rholo drivers.
7     */
8    
9     /* additional user commands */
10     #define DO_LOAD 0 /* load octree object */
11     #define DO_UNLOAD 1 /* unload (free) octree object */
12     #define DO_XFORM 2 /* set/print object transform */
13     #define DO_MOVE 3 /* add to object transform */
14     #define DO_UNMOVE 4 /* undo last transform change */
15     #define DO_DUP 5 /* duplicate object */
16     #define DO_SHOW 6 /* show object (low quality) */
17     #define DO_LIGHT 7 /* illuminate object (high quality) */
18     #define DO_HIDE 8 /* hide object */
19     #define DO_OBJECT 9 /* print object statistics */
20    
21     #define DO_NCMDS 10 /* number of object display commands */
22    
23     /* commands entered on stdin only */
24 gwlarson 3.3 #define DO_INIT {"load","clear","xform","move","unmove","dup",\
25 gwlarson 3.1 "show","light","hide","object"}
26    
27     /*******************************************************************
28     * The following routines are available for calling from the driver:
29    
30     int
31     (*dobj_lightsamp)(c, p, v) : apply next sample for local light sources
32     COLR c; : pixel color (RGBE)
33     FVECT p; : world intersection point
34     FVECT v; : ray direction vector
35    
36     If the pointer to the function dobj_lightsamp is non-NULL, then the
37     dev_value() driver routine should call this rather than use a
38     given sample in its own data structures. This pointer is set
39     in the dobj_lighting() function described below, which may be
40     called indirectly by the dobj_command() function.
41    
42    
43     int
44     dobj_command(cmd, args) : check/run object display command
45     char *cmd, *args; : command name and argument string
46    
47     Check to see if this is an object display command, and return the command
48     number after running it if it is, or -1 if it isn't. Error messages should
49     be printed with error(COMMAND,err).
50    
51    
52     double
53 gwlarson 3.2 dobj_trace(nm, rorg, rdir) : check for ray intersection with objects
54     char nm[]; : object name (modified)
55 gwlarson 3.1 FVECT rorg, rdir; : ray origin and direction
56    
57 gwlarson 3.2 Check to see if the given ray intersects the given object,
58 gwlarson 3.1 returning the distance the ray traveled if it did, or FHUGE if it didn't.
59 gwlarson 3.2 If nm contains "*", then all visible objects are checked and the name
60     of the intersected object is returned, or "" if none. If nm is NULL,
61     then all visible objects are checked, but the name is not returned.
62 gwlarson 3.1
63    
64 gwlarson 3.4 int
65 gwlarson 3.1 dobj_render() : render visible objects to OpenGL
66    
67     Renders all display objects using OpenGL, assuming desired view has
68     been set. This routine also assumes that the tone-mapping library
69     is being used to set exposure, and it queries this information to
70 gwlarson 3.4 adjust light sources as necessary for illuminated objects. Returns
71     the number of objects rendered.
72 gwlarson 3.1
73    
74     void
75     dobj_cleanup() : clean up data structures
76    
77     Frees all allocated data structures and objects.
78    
79    
80     ++++ The following routines are usually called through dobj_command() ++++
81    
82    
83     int
84     dobj_load(oct, nam) : create/load an octree object
85     char *oct, *nam; : octree and object name
86    
87     Load an octree for rendering as a local object, giving it the indicated name.
88     Returns 1 on success, 0 on failure (with COMMAND error message).
89    
90    
91     int
92     dobj_unload(nam) : free the named object
93     char *nam; : object name
94    
95     Free all memory associated with the named object.
96     Returns 1 on success, 0 on failure (with COMMAND error message).
97    
98    
99     int
100     dobj_xform(nam, add, ac, av) : set/add transform for nam
101     char *nam; : object name
102     int add; : add to transform or create new one?
103     int ac; : transform argument count
104     char *av[]; : transform arguments
105    
106     Set or add to the transform for the named object.
107     Returns 1 on success, 0 on failure (with COMMAND error message).
108    
109    
110     int
111     dobj_unmove() : undo last transform change
112    
113     Undo the last transform change.
114     Returns 1 on success, 0 on failure (with COMMAND error message).
115    
116    
117     int
118     dobj_dup(oldnm, nam) : duplicate object oldnm as nam
119     char *oldnm, *nam;
120    
121     Duplicate the named object and give the copy a new name.
122     Returns 1 on success, 0 on failure (with COMMAND error message).
123    
124    
125     int
126     dobj_lighting(nam, cn) : set up lighting for display object
127     char *nam; : object name
128     int cn; : new drawing code
129    
130     Set the lighting of the named object to DO_SHOW, DO_HIDE or DO_LIGHT.
131     Change lighting of all objects if nam is "*".
132     Returns 1 on success, 0 on failure (with COMMAND error message).
133    
134    
135     int
136     dobj_putstats(nam, fp) : print object statistics
137     char *nam; : object name
138     FILE *fp; : output file
139    
140     Print current position, size and transform for the named object,
141     or all objects if nam is "*".
142     Returns 1 on success, 0 on failure (with COMMAND error message).
143    
144    
145     ******************************************************************/
146    
147    
148     extern double dobj_trace();
149    
150     extern char rhdcmd[DO_NCMDS][8];
151    
152     extern int (*dobj_lightsamp)(); /* pointer to function to get lights */