1 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
2 |
|
3 |
#ifndef lint |
4 |
static char SCCSid[] = "$SunId$ SGI"; |
5 |
#endif |
6 |
|
7 |
/* |
8 |
* Load Radiance object(s) and create OpenGL display lists |
9 |
*/ |
10 |
|
11 |
#include "radogl.h" |
12 |
|
13 |
#ifndef NLIST2ALLOC |
14 |
#define NLIST2ALLOC 16 /* batch of display lists to get */ |
15 |
#endif |
16 |
|
17 |
extern int o_sphere(), o_face(), o_cone(), o_ring(), |
18 |
o_source(), o_instance(); |
19 |
|
20 |
extern int m_normal(), m_glass(), m_aniso(), m_brdf(), m_brdf2(), |
21 |
m_light(), m_prism(), m_mirror(); |
22 |
|
23 |
FUN ofun[NUMOTYPE] = INIT_OTYPE; |
24 |
|
25 |
|
26 |
static |
27 |
initotypes() /* initialize ofun array */ |
28 |
{ |
29 |
if (ofun[OBJ_SPHERE].funp == o_sphere) |
30 |
return; /* already done */ |
31 |
/* assign surface types */ |
32 |
ofun[OBJ_SPHERE].funp = |
33 |
ofun[OBJ_BUBBLE].funp = o_sphere; |
34 |
ofun[OBJ_FACE].funp = o_face; |
35 |
ofun[OBJ_CONE].funp = |
36 |
ofun[OBJ_CUP].funp = |
37 |
ofun[OBJ_CYLINDER].funp = |
38 |
ofun[OBJ_TUBE].funp = o_cone; |
39 |
ofun[OBJ_RING].funp = o_ring; |
40 |
ofun[OBJ_SOURCE].funp = o_source; |
41 |
ofun[OBJ_INSTANCE].funp = o_instance; |
42 |
/* assign material types */ |
43 |
ofun[MAT_TRANS].funp = |
44 |
ofun[MAT_PLASTIC].funp = |
45 |
ofun[MAT_METAL].funp = m_normal; |
46 |
ofun[MAT_GLASS].funp = |
47 |
ofun[MAT_DIELECTRIC].funp = |
48 |
ofun[MAT_INTERFACE].funp = m_glass; |
49 |
ofun[MAT_PLASTIC2].funp = |
50 |
ofun[MAT_METAL2].funp = |
51 |
ofun[MAT_TRANS2].funp = m_aniso; |
52 |
ofun[MAT_TDATA].funp = |
53 |
ofun[MAT_PDATA].funp = |
54 |
ofun[MAT_MDATA].funp = |
55 |
ofun[MAT_TFUNC].funp = |
56 |
ofun[MAT_PFUNC].funp = |
57 |
ofun[MAT_MFUNC].funp = m_brdf; |
58 |
ofun[MAT_BRTDF].funp = m_brdf2; |
59 |
ofun[MAT_GLOW].funp = |
60 |
ofun[MAT_LIGHT].funp = |
61 |
ofun[MAT_SPOT].funp = |
62 |
ofun[MAT_ILLUM].funp = m_light; |
63 |
ofun[MAT_MIRROR].funp = m_mirror; |
64 |
ofun[MAT_DIRECT1].funp = |
65 |
ofun[MAT_DIRECT2].funp = m_prism; |
66 |
} |
67 |
|
68 |
|
69 |
int |
70 |
newglist() /* allocate an OGL list id */ |
71 |
{ |
72 |
static int nextlist, nleft = 0; |
73 |
|
74 |
if (!nleft--) { |
75 |
nextlist = glGenLists(NLIST2ALLOC); |
76 |
nleft = NLIST2ALLOC-1; |
77 |
} |
78 |
return(nextlist++); |
79 |
} |
80 |
|
81 |
|
82 |
rgl_checkerr(where) /* check for GL or GLU error */ |
83 |
char *where; |
84 |
{ |
85 |
register GLenum errcode; |
86 |
|
87 |
while ((errcode = glGetError()) != GL_NO_ERROR) { |
88 |
sprintf(errmsg, "OpenGL error %s: %s", |
89 |
where, gluErrorString(errcode)); |
90 |
error(WARNING, errmsg); |
91 |
} |
92 |
} |
93 |
|
94 |
|
95 |
int |
96 |
rgl_filelist(ic, inp) /* load scene files into display list */ |
97 |
int ic; |
98 |
char **inp; |
99 |
{ |
100 |
int listid; |
101 |
|
102 |
initotypes(); /* prepare */ |
103 |
listid = newglist(); |
104 |
glNewList(listid, GL_COMPILE); |
105 |
lightinit(); /* start light source list */ |
106 |
while (ic--) /* load each file */ |
107 |
rgl_load(*inp++); |
108 |
surfclean(); /* clean up first pass */ |
109 |
lightclean(); /* clean up light sources also */ |
110 |
glEndList(); /* end of top display list */ |
111 |
lightdefs(); /* define light sources */ |
112 |
loadoctrees(); /* load octrees (sublists) for instances */ |
113 |
return(listid); /* all done -- return list id */ |
114 |
} |
115 |
|
116 |
|
117 |
int |
118 |
rgl_octlist(fname, cent, radp) /* load octree objects into display list */ |
119 |
char *fname; |
120 |
FVECT cent; /* returned octree center (optional) */ |
121 |
double *radp; /* returned octree size (optional) */ |
122 |
{ |
123 |
double r; |
124 |
int listid; |
125 |
/* modeled after rgl_filelist() */ |
126 |
initotypes(); |
127 |
/* check the octree and get its size */ |
128 |
r = checkoct(fname, cent); |
129 |
if (radp != NULL) *radp = r; |
130 |
/* start the display list */ |
131 |
listid = newglist(); |
132 |
glNewList(listid, GL_COMPILE); |
133 |
lightinit(); /* start light source list */ |
134 |
loadoct(fname); /* load octree objects into display list */ |
135 |
surfclean(); /* clean up and close top list */ |
136 |
lightclean(); /* clean up light sources also */ |
137 |
glEndList(); /* close top list */ |
138 |
lightdefs(); /* define light sources */ |
139 |
loadoctrees(); /* load referenced octrees into sublists */ |
140 |
return(listid); |
141 |
} |
142 |
|
143 |
|
144 |
rgl_load(inpspec) /* convert scene description into OGL calls */ |
145 |
char *inpspec; |
146 |
{ |
147 |
FILE *popen(); |
148 |
char *fgetline(); |
149 |
FILE *infp; |
150 |
char buf[1024]; |
151 |
register int c; |
152 |
|
153 |
if (inpspec == NULL) { |
154 |
infp = stdin; |
155 |
inpspec = "standard input"; |
156 |
} else if (inpspec[0] == '!') { |
157 |
if ((infp = popen(inpspec+1, "r")) == NULL) { |
158 |
sprintf(errmsg, "cannot execute \"%s\"", inpspec); |
159 |
error(SYSTEM, errmsg); |
160 |
} |
161 |
} else if ((infp = fopen(inpspec, "r")) == NULL) { |
162 |
sprintf(errmsg, "cannot open scene file \"%s\"", inpspec); |
163 |
error(SYSTEM, errmsg); |
164 |
} |
165 |
while ((c = getc(infp)) != EOF) { |
166 |
if (isspace(c)) |
167 |
continue; |
168 |
if (c == '#') { /* comment */ |
169 |
fgets(buf, sizeof(buf), infp); |
170 |
} else if (c == '!') { /* command */ |
171 |
ungetc(c, infp); |
172 |
fgetline(buf, sizeof(buf), infp); |
173 |
rgl_load(buf); |
174 |
} else { /* object */ |
175 |
ungetc(c, infp); |
176 |
rgl_object(inpspec, infp); |
177 |
} |
178 |
} |
179 |
if (inpspec[0] == '!') |
180 |
pclose(infp); |
181 |
else |
182 |
fclose(infp); |
183 |
} |
184 |
|
185 |
|
186 |
rgl_object(name, fp) /* read the next object */ |
187 |
char *name; |
188 |
FILE *fp; |
189 |
{ |
190 |
static OBJREC ob; |
191 |
char sbuf[MAXSTR]; |
192 |
int rval; |
193 |
/* get modifier */ |
194 |
strcpy(sbuf, "EOF"); |
195 |
fgetword(sbuf, MAXSTR, fp); |
196 |
ob.omod = 0; /* use ob.os for pointer to material */ |
197 |
if (!strcmp(sbuf, VOIDID)) |
198 |
ob.os = NULL; |
199 |
else |
200 |
ob.os = (char *)getmatp(sbuf); |
201 |
/* get type */ |
202 |
strcpy(sbuf, "EOF"); |
203 |
fgetword(sbuf, MAXSTR, fp); |
204 |
if (!strcmp(sbuf, ALIASID)) |
205 |
ob.otype = -1; |
206 |
else if ((ob.otype = otype(sbuf)) < 0) { |
207 |
sprintf(errmsg, "(%s): unknown type \"%s\"", name, sbuf); |
208 |
error(USER, errmsg); |
209 |
} |
210 |
/* get identifier */ |
211 |
sbuf[0] = '\0'; |
212 |
fgetword(sbuf, MAXSTR, fp); |
213 |
ob.oname = sbuf; |
214 |
/* get arguments */ |
215 |
if (ob.otype == -1) { |
216 |
char sbuf2[MAXSTR]; /* get alias */ |
217 |
strcpy(sbuf2, "EOF"); |
218 |
fgetword(sbuf2, MAXSTR, fp); |
219 |
if (ob.os == NULL) |
220 |
ob.os = (char *)getmatp(sbuf2); |
221 |
o_default(&ob); /* fake reference */ |
222 |
return; |
223 |
} |
224 |
if ((rval = readfargs(&ob.oargs, fp)) == 0) { |
225 |
sprintf(errmsg, "(%s): bad arguments", name); |
226 |
objerror(&ob, USER, errmsg); |
227 |
} else if (rval < 0) { |
228 |
sprintf(errmsg, "(%s): error reading scene", name); |
229 |
error(SYSTEM, errmsg); |
230 |
} |
231 |
/* execute */ |
232 |
(*ofun[ob.otype].funp)(&ob); |
233 |
/* free arguments */ |
234 |
freefargs(&ob.oargs); |
235 |
} |