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root/radiance/ray/src/hd/rhdobj.h
Revision: 3.5
Committed: Thu Dec 31 12:57:06 1998 UTC (25 years, 9 months ago) by gwlarson
Content type: text/plain
Branch: MAIN
Changes since 3.4: +3 -2 lines
Log Message:
fixed redrawing of local objects in OpenGL driver

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 gwlarson 3.5 Check to see if this is an object display command, and return -1 if
48     it isn't. If it is a valid command that results in some visible
49     change, return non-zero, otherwise return 0. Error messages should
50 gwlarson 3.1 be printed with error(COMMAND,err).
51    
52    
53     double
54 gwlarson 3.2 dobj_trace(nm, rorg, rdir) : check for ray intersection with objects
55     char nm[]; : object name (modified)
56 gwlarson 3.1 FVECT rorg, rdir; : ray origin and direction
57    
58 gwlarson 3.2 Check to see if the given ray intersects the given object,
59 gwlarson 3.1 returning the distance the ray traveled if it did, or FHUGE if it didn't.
60 gwlarson 3.2 If nm contains "*", then all visible objects are checked and the name
61     of the intersected object is returned, or "" if none. If nm is NULL,
62     then all visible objects are checked, but the name is not returned.
63 gwlarson 3.1
64    
65 gwlarson 3.4 int
66 gwlarson 3.1 dobj_render() : render visible objects to OpenGL
67    
68     Renders all display objects using OpenGL, assuming desired view has
69     been set. This routine also assumes that the tone-mapping library
70     is being used to set exposure, and it queries this information to
71 gwlarson 3.4 adjust light sources as necessary for illuminated objects. Returns
72     the number of objects rendered.
73 gwlarson 3.1
74    
75     void
76     dobj_cleanup() : clean up data structures
77    
78     Frees all allocated data structures and objects.
79    
80    
81     ++++ The following routines are usually called through dobj_command() ++++
82    
83    
84     int
85     dobj_load(oct, nam) : create/load an octree object
86     char *oct, *nam; : octree and object name
87    
88     Load an octree for rendering as a local object, giving it the indicated name.
89     Returns 1 on success, 0 on failure (with COMMAND error message).
90    
91    
92     int
93     dobj_unload(nam) : free the named object
94     char *nam; : object name
95    
96     Free all memory associated with the named object.
97     Returns 1 on success, 0 on failure (with COMMAND error message).
98    
99    
100     int
101     dobj_xform(nam, add, ac, av) : set/add transform for nam
102     char *nam; : object name
103     int add; : add to transform or create new one?
104     int ac; : transform argument count
105     char *av[]; : transform arguments
106    
107     Set or add to the transform for the named object.
108     Returns 1 on success, 0 on failure (with COMMAND error message).
109    
110    
111     int
112     dobj_unmove() : undo last transform change
113    
114     Undo the last transform change.
115     Returns 1 on success, 0 on failure (with COMMAND error message).
116    
117    
118     int
119     dobj_dup(oldnm, nam) : duplicate object oldnm as nam
120     char *oldnm, *nam;
121    
122     Duplicate the named object and give the copy a new name.
123     Returns 1 on success, 0 on failure (with COMMAND error message).
124    
125    
126     int
127     dobj_lighting(nam, cn) : set up lighting for display object
128     char *nam; : object name
129     int cn; : new drawing code
130    
131     Set the lighting of the named object to DO_SHOW, DO_HIDE or DO_LIGHT.
132     Change lighting of all objects if nam is "*".
133     Returns 1 on success, 0 on failure (with COMMAND error message).
134    
135    
136     int
137     dobj_putstats(nam, fp) : print object statistics
138     char *nam; : object name
139     FILE *fp; : output file
140    
141     Print current position, size and transform for the named object,
142     or all objects if nam is "*".
143     Returns 1 on success, 0 on failure (with COMMAND error message).
144    
145    
146     ******************************************************************/
147    
148    
149     extern double dobj_trace();
150    
151     extern char rhdcmd[DO_NCMDS][8];
152    
153     extern int (*dobj_lightsamp)(); /* pointer to function to get lights */