| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id$"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Load Radiance object(s) and create OpenGL display lists |
| 6 |
*/ |
| 7 |
|
| 8 |
#include "copyright.h" |
| 9 |
|
| 10 |
#include "radogl.h" |
| 11 |
|
| 12 |
#ifndef NLIST2ALLOC |
| 13 |
#define NLIST2ALLOC 16 /* batch of display lists to get */ |
| 14 |
#endif |
| 15 |
|
| 16 |
FUN ofun[NUMOTYPE] = INIT_OTYPE; |
| 17 |
|
| 18 |
static int nextlist, nlistleft = 0; |
| 19 |
|
| 20 |
|
| 21 |
static void |
| 22 |
initotypes() /* initialize ofun array */ |
| 23 |
{ |
| 24 |
if (ofun[OBJ_SPHERE].funp == o_sphere) |
| 25 |
return; /* already done */ |
| 26 |
/* assign surface types */ |
| 27 |
ofun[OBJ_SPHERE].funp = |
| 28 |
ofun[OBJ_BUBBLE].funp = o_sphere; |
| 29 |
ofun[OBJ_FACE].funp = o_face; |
| 30 |
ofun[OBJ_CONE].funp = |
| 31 |
ofun[OBJ_CUP].funp = |
| 32 |
ofun[OBJ_CYLINDER].funp = |
| 33 |
ofun[OBJ_TUBE].funp = o_cone; |
| 34 |
ofun[OBJ_RING].funp = o_ring; |
| 35 |
ofun[OBJ_SOURCE].funp = o_source; |
| 36 |
ofun[OBJ_INSTANCE].funp = o_instance; |
| 37 |
ofun[OBJ_MESH].funp = o_unsupported; |
| 38 |
/* assign material types */ |
| 39 |
ofun[MAT_TRANS].funp = |
| 40 |
ofun[MAT_PLASTIC].funp = |
| 41 |
ofun[MAT_METAL].funp = m_normal; |
| 42 |
ofun[MAT_GLASS].funp = |
| 43 |
ofun[MAT_DIELECTRIC].funp = |
| 44 |
ofun[MAT_INTERFACE].funp = m_glass; |
| 45 |
ofun[MAT_PLASTIC2].funp = |
| 46 |
ofun[MAT_METAL2].funp = |
| 47 |
ofun[MAT_TRANS2].funp = m_aniso; |
| 48 |
ofun[MAT_TDATA].funp = |
| 49 |
ofun[MAT_PDATA].funp = |
| 50 |
ofun[MAT_MDATA].funp = |
| 51 |
ofun[MAT_TFUNC].funp = |
| 52 |
ofun[MAT_PFUNC].funp = |
| 53 |
ofun[MAT_MFUNC].funp = m_brdf; |
| 54 |
ofun[MAT_BRTDF].funp = m_brdf2; |
| 55 |
ofun[MAT_GLOW].funp = |
| 56 |
ofun[MAT_LIGHT].funp = |
| 57 |
ofun[MAT_SPOT].funp = |
| 58 |
ofun[MAT_ILLUM].funp = m_light; |
| 59 |
ofun[MAT_MIRROR].funp = m_mirror; |
| 60 |
ofun[MAT_DIRECT1].funp = |
| 61 |
ofun[MAT_DIRECT2].funp = m_prism; |
| 62 |
} |
| 63 |
|
| 64 |
|
| 65 |
int |
| 66 |
newglist() /* allocate an OGL list id */ |
| 67 |
{ |
| 68 |
if (!nlistleft--) { |
| 69 |
nextlist = glGenLists(NLIST2ALLOC); |
| 70 |
if (!nextlist) |
| 71 |
error(SYSTEM, "no list space left in newglist"); |
| 72 |
nlistleft = NLIST2ALLOC-1; |
| 73 |
} |
| 74 |
return(nextlist++); |
| 75 |
} |
| 76 |
|
| 77 |
|
| 78 |
void |
| 79 |
rgl_checkerr(where) /* check for GL or GLU error */ |
| 80 |
char *where; |
| 81 |
{ |
| 82 |
register GLenum errcode; |
| 83 |
|
| 84 |
while ((errcode = glGetError()) != GL_NO_ERROR) { |
| 85 |
sprintf(errmsg, "OpenGL error %s: %s", |
| 86 |
where, gluErrorString(errcode)); |
| 87 |
error(WARNING, errmsg); |
| 88 |
} |
| 89 |
} |
| 90 |
|
| 91 |
|
| 92 |
int |
| 93 |
rgl_filelist(ic, inp, nl) /* load scene files into display list */ |
| 94 |
int ic; |
| 95 |
char **inp; |
| 96 |
int *nl; /* returned number of lists (optional) */ |
| 97 |
{ |
| 98 |
int listid; |
| 99 |
|
| 100 |
initotypes(); /* prepare */ |
| 101 |
listid = newglist(); |
| 102 |
glNewList(listid, GL_COMPILE); |
| 103 |
lightinit(); /* start light source list */ |
| 104 |
while (ic--) /* load each file */ |
| 105 |
rgl_load(*inp++); |
| 106 |
surfclean(); /* clean up first pass */ |
| 107 |
lightclean(); /* clean up light sources also */ |
| 108 |
glEndList(); /* end of top display list */ |
| 109 |
lightdefs(); /* define light sources */ |
| 110 |
loadoctrees(); /* load octrees (sublists) for instances */ |
| 111 |
if (nl != NULL) /* return total number of lists allocated */ |
| 112 |
*nl = nextlist - listid; |
| 113 |
return(listid); /* all done -- return list id */ |
| 114 |
} |
| 115 |
|
| 116 |
|
| 117 |
int |
| 118 |
rgl_octlist(fname, cent, radp, nl) /* load scen into display list */ |
| 119 |
char *fname; |
| 120 |
FVECT cent; /* returned octree center (optional) */ |
| 121 |
FLOAT *radp; /* returned octree size (optional) */ |
| 122 |
int *nl; /* returned number of lists (optional) */ |
| 123 |
{ |
| 124 |
double r; |
| 125 |
int listid; |
| 126 |
/* modeled after rgl_filelist() */ |
| 127 |
initotypes(); |
| 128 |
/* check the octree and get its size */ |
| 129 |
r = checkoct(fname, cent); |
| 130 |
if (radp != NULL) *radp = r; |
| 131 |
/* start the display list */ |
| 132 |
listid = newglist(); |
| 133 |
glNewList(listid, GL_COMPILE); |
| 134 |
lightinit(); /* start light source list */ |
| 135 |
loadoct(fname); /* load octree objects into display list */ |
| 136 |
surfclean(); /* clean up and close top list */ |
| 137 |
lightclean(); /* clean up light sources also */ |
| 138 |
glEndList(); /* close top list */ |
| 139 |
lightdefs(); /* define light sources */ |
| 140 |
loadoctrees(); /* load referenced octrees into sublists */ |
| 141 |
if (nl != NULL) /* return total number of lists allocated */ |
| 142 |
*nl = nextlist - listid; |
| 143 |
return(listid); |
| 144 |
} |
| 145 |
|
| 146 |
|
| 147 |
void |
| 148 |
rgl_load(inpspec) /* convert scene description into OGL calls */ |
| 149 |
char *inpspec; |
| 150 |
{ |
| 151 |
FILE *popen(); |
| 152 |
char *fgetline(); |
| 153 |
FILE *infp; |
| 154 |
char buf[1024]; |
| 155 |
register int c; |
| 156 |
|
| 157 |
if (inpspec == NULL) { |
| 158 |
infp = stdin; |
| 159 |
inpspec = "standard input"; |
| 160 |
} else if (inpspec[0] == '!') { |
| 161 |
if ((infp = popen(inpspec+1, "r")) == NULL) { |
| 162 |
sprintf(errmsg, "cannot execute \"%s\"", inpspec); |
| 163 |
error(SYSTEM, errmsg); |
| 164 |
} |
| 165 |
} else if ((infp = fopen(inpspec, "r")) == NULL) { |
| 166 |
sprintf(errmsg, "cannot open scene file \"%s\"", inpspec); |
| 167 |
error(SYSTEM, errmsg); |
| 168 |
} |
| 169 |
while ((c = getc(infp)) != EOF) { |
| 170 |
if (isspace(c)) |
| 171 |
continue; |
| 172 |
if (c == '#') { /* comment */ |
| 173 |
fgets(buf, sizeof(buf), infp); |
| 174 |
} else if (c == '!') { /* command */ |
| 175 |
ungetc(c, infp); |
| 176 |
fgetline(buf, sizeof(buf), infp); |
| 177 |
rgl_load(buf); |
| 178 |
} else { /* object */ |
| 179 |
ungetc(c, infp); |
| 180 |
rgl_object(inpspec, infp); |
| 181 |
} |
| 182 |
} |
| 183 |
if (inpspec[0] == '!') |
| 184 |
pclose(infp); |
| 185 |
else |
| 186 |
fclose(infp); |
| 187 |
} |
| 188 |
|
| 189 |
|
| 190 |
void |
| 191 |
rgl_object(name, fp) /* read the next object */ |
| 192 |
char *name; |
| 193 |
FILE *fp; |
| 194 |
{ |
| 195 |
static OBJREC ob; |
| 196 |
char sbuf[MAXSTR]; |
| 197 |
int rval; |
| 198 |
/* get modifier */ |
| 199 |
strcpy(sbuf, "EOF"); |
| 200 |
fgetword(sbuf, MAXSTR, fp); |
| 201 |
ob.omod = 0; /* use ob.os for pointer to material */ |
| 202 |
if (!strcmp(sbuf, VOIDID) || !strcmp(sbuf, ALIASMOD)) |
| 203 |
ob.os = NULL; |
| 204 |
else |
| 205 |
ob.os = (char *)getmatp(sbuf); |
| 206 |
/* get type */ |
| 207 |
strcpy(sbuf, "EOF"); |
| 208 |
fgetword(sbuf, MAXSTR, fp); |
| 209 |
if ((ob.otype = otype(sbuf)) < 0) { |
| 210 |
sprintf(errmsg, "(%s): unknown type \"%s\"", name, sbuf); |
| 211 |
error(USER, errmsg); |
| 212 |
} |
| 213 |
/* get identifier */ |
| 214 |
sbuf[0] = '\0'; |
| 215 |
fgetword(sbuf, MAXSTR, fp); |
| 216 |
ob.oname = sbuf; |
| 217 |
/* get arguments */ |
| 218 |
if (ob.otype == MOD_ALIAS) { |
| 219 |
char sbuf2[MAXSTR]; /* get alias */ |
| 220 |
strcpy(sbuf2, "EOF"); |
| 221 |
fgetword(sbuf2, MAXSTR, fp); |
| 222 |
if (ob.os == NULL) |
| 223 |
ob.os = (char *)getmatp(sbuf2); |
| 224 |
o_default(&ob); /* fake reference */ |
| 225 |
return; |
| 226 |
} |
| 227 |
if ((rval = readfargs(&ob.oargs, fp)) == 0) { |
| 228 |
sprintf(errmsg, "(%s): bad arguments", name); |
| 229 |
objerror(&ob, USER, errmsg); |
| 230 |
} else if (rval < 0) { |
| 231 |
sprintf(errmsg, "(%s): error reading scene", name); |
| 232 |
error(SYSTEM, errmsg); |
| 233 |
} |
| 234 |
/* execute */ |
| 235 |
(*ofun[ob.otype].funp)(&ob); |
| 236 |
/* free arguments */ |
| 237 |
freefargs(&ob.oargs); |
| 238 |
} |
