| 1 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ SGI"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* Program to display Radiance scene using OpenGL. |
| 9 |
*/ |
| 10 |
|
| 11 |
#include "radogl.h" |
| 12 |
#include "view.h" |
| 13 |
#include "paths.h" |
| 14 |
#include <sys/types.h> |
| 15 |
#include <GL/glx.h> |
| 16 |
#include <ctype.h> |
| 17 |
#include "glradicon.h" |
| 18 |
|
| 19 |
#ifndef MAXVIEW |
| 20 |
#define MAXVIEW 63 /* maximum number of standard views */ |
| 21 |
#endif |
| 22 |
#ifndef MAXSCENE |
| 23 |
#define MAXSCENE 127 /* maximum number of scene files */ |
| 24 |
#endif |
| 25 |
|
| 26 |
#define ZOOMPCT 9 /* percent to zoom at a time */ |
| 27 |
|
| 28 |
#define MOVPCT 7 /* percent distance to move /frame */ |
| 29 |
#define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1) |
| 30 |
#define MOVDEG (-5) /* degrees to orbit CW/down /frame */ |
| 31 |
#define MOVORB(s) ((s)&ShiftMask ? 1 : (s)&ControlMask ? -1 : 0) |
| 32 |
|
| 33 |
#define MINWIDTH 480 /* minimum graphics window width */ |
| 34 |
#define MINHEIGHT 400 /* minimum graphics window height */ |
| 35 |
|
| 36 |
#define BORWIDTH 5 /* border width */ |
| 37 |
|
| 38 |
#define ourscreen DefaultScreen(ourdisplay) |
| 39 |
#define ourroot RootWindow(ourdisplay,ourscreen) |
| 40 |
#define ourmask (StructureNotifyMask|ExposureMask|KeyPressMask|\ |
| 41 |
ButtonPressMask|ButtonReleaseMask) |
| 42 |
|
| 43 |
#define levptr(etype) ((etype *)¤tevent) |
| 44 |
|
| 45 |
XEvent currentevent; /* current event */ |
| 46 |
|
| 47 |
int mapped = 0; /* window is mapped? */ |
| 48 |
unsigned long ourblack=0, ourwhite=~0; |
| 49 |
|
| 50 |
Display *ourdisplay = NULL; /* our display */ |
| 51 |
XVisualInfo *ourvinf; /* our visual information */ |
| 52 |
Window gwind = 0; /* our graphics window */ |
| 53 |
int hres, vres; /* rendering window dimensions */ |
| 54 |
int maxhres, maxvres; /* maximum given dimensions */ |
| 55 |
GLXContext gctx; /* our GLX context */ |
| 56 |
|
| 57 |
double pwidth, pheight; /* pixel dimensions (mm) */ |
| 58 |
|
| 59 |
int headlocked = 0; /* lock vertical motion */ |
| 60 |
|
| 61 |
struct { |
| 62 |
char *nam; /* view name (NULL if none) */ |
| 63 |
VIEW *v; /* parameters (NULL term.) */ |
| 64 |
} vwl[MAXVIEW+1]; /* our list of views */ |
| 65 |
|
| 66 |
int currentview = 0; /* current view number */ |
| 67 |
VIEW thisview = STDVIEW; /* displayed view */ |
| 68 |
VIEW lastview; /* last recorded view */ |
| 69 |
|
| 70 |
char *progname; /* global argv[0] */ |
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char *radfile; /* rad input file */ |
| 72 |
char *scene[MAXSCENE+1]; /* material and scene file list */ |
| 73 |
int nscenef = 0; /* number of scene files */ |
| 74 |
char *octree; /* octree name (NULL if unnec.) */ |
| 75 |
|
| 76 |
int rtpd[3]; /* rtrace process descriptors */ |
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|
| 78 |
int backvis = 1; /* back faces visible? */ |
| 79 |
|
| 80 |
int displist; /* our scene display list */ |
| 81 |
|
| 82 |
int in_dev_view = 0; /* currently in dev_view() */ |
| 83 |
|
| 84 |
extern char *fgets(), *fgetline(), *atos(), *scan4var(); |
| 85 |
extern int nowarn; /* turn warnings off? */ |
| 86 |
extern time_t time(); |
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|
| 88 |
|
| 89 |
main(argc, argv) |
| 90 |
int argc; |
| 91 |
char *argv[]; |
| 92 |
{ |
| 93 |
char *viewsel = NULL; |
| 94 |
long vwintvl = 0; |
| 95 |
int i; |
| 96 |
|
| 97 |
progname = argv[0]; |
| 98 |
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
| 99 |
switch (argv[i][1]) { |
| 100 |
case 'v': |
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viewsel = argv[++i]; |
| 102 |
break; |
| 103 |
case 'w': |
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nowarn = !nowarn; |
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break; |
| 106 |
case 'c': |
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vwintvl = atoi(argv[++i]); |
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break; |
| 109 |
case 'b': |
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backvis = !backvis; |
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break; |
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default: |
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goto userr; |
| 114 |
} |
| 115 |
if (i >= argc) |
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goto userr; |
| 117 |
/* run rad and get views */ |
| 118 |
runrad(argc-i, argv+i); |
| 119 |
/* check view */ |
| 120 |
if (viewsel != NULL && (currentview = findvw(viewsel)) < 0) { |
| 121 |
fprintf(stderr, "%s: no such view\n", viewsel); |
| 122 |
quit(1); |
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} |
| 124 |
/* open GL */ |
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dev_open(radfile = argv[i]); |
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/* load octree or scene files */ |
| 127 |
if (octree != NULL) { |
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displist = rgl_octlist(octree, NULL, NULL); |
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startrtrace(octree); |
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} else |
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displist = rgl_filelist(nscenef, scene); |
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/* set initial view */ |
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dev_view(vwl[currentview].v); |
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/* input/render loop */ |
| 135 |
while (dev_input(vwintvl)) |
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; |
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/* all done */ |
| 138 |
quit(0); |
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userr: |
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fprintf(stderr, "Usage: %s [-w][-c #secs][-v view] rfile [VAR=value]..\n", |
| 141 |
argv[0]); |
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quit(1); |
| 143 |
} |
| 144 |
|
| 145 |
|
| 146 |
quit(code) /* exit gracefully */ |
| 147 |
int code; |
| 148 |
{ |
| 149 |
if (ourdisplay != NULL) |
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dev_close(); |
| 151 |
if (rtpd[2] > 0) { |
| 152 |
if (close_process(rtpd) > 0) |
| 153 |
wputs("bad exit status from rtrace\n"); |
| 154 |
rtpd[2] = 0; |
| 155 |
} |
| 156 |
exit(code); |
| 157 |
} |
| 158 |
|
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|
| 160 |
startrtrace(octname) /* start rtrace on octname */ |
| 161 |
char *octname; |
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{ |
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static char *av[12] = {"rtrace", "-h", "-fff", "-ld+", |
| 164 |
"-opL", "-x", "1"}; |
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int ac = 7; |
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|
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if (nowarn) av[ac++] = "-w-"; |
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av[ac++] = octname; |
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av[ac] = NULL; |
| 170 |
if (open_process(rtpd, av) <= 0) |
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error(SYSTEM, "cannot start rtrace process"); |
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} |
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|
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|
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runrad(ac, av) /* run rad and load variables */ |
| 176 |
int ac; |
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char **av; |
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{ |
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static char optfile[] = TEMPLATE; |
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int nvn = 0, nvv = 0; |
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FILE *fp; |
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int cval; |
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register char *cp; |
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char radcomm[256], buf[128], nam[32]; |
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/* set rad commmand */ |
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strcpy(radcomm, "rad -w -v 0 "); /* look out below! */ |
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cp = radcomm + 19; |
| 188 |
while (ac--) { |
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strcpy(cp, *av++); |
| 190 |
while (*cp) cp++; |
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*cp++ = ' '; |
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} |
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strcpy(cp, "OPTFILE="); /* create temporary options file */ |
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strcpy(cp+8, mktemp(optfile)); |
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if (system(radcomm)) /* update octree */ |
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error(USER, "error executing rad command"); |
| 197 |
/* replace "-v 0" with "-n -e -s -V" */ |
| 198 |
strcpy(radcomm+7, "-n -e -s -V"); |
| 199 |
radcomm[18] = ' '; |
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if ((fp = popen(radcomm, "r")) == NULL) |
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error(SYSTEM, "cannot start rad command"); |
| 202 |
buf[0] = '\0'; /* read variables alphabetically */ |
| 203 |
/* get exposure */ |
| 204 |
if ((cp = scan4var(buf, sizeof(buf), "EXPOSURE", fp)) != NULL) { |
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expval = atof(cp); |
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if (*cp == '-' | *cp == '+') |
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expval = pow(2., expval); |
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} |
| 209 |
/* look for materials */ |
| 210 |
while ((cp = scan4var(buf, sizeof(buf), "materials", fp)) != NULL) { |
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nscenef += wordstring(scene+nscenef, cp); |
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buf[0] = '\0'; |
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} |
| 214 |
/* look for octree */ |
| 215 |
if ((cp = scan4var(buf, sizeof(buf), "OCTREE", fp)) != NULL) |
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octree = savqstr(cp); |
| 217 |
/* look for scene files */ |
| 218 |
while ((cp = scan4var(buf, sizeof(buf), "scene", fp)) != NULL) { |
| 219 |
nscenef += wordstring(scene+nscenef, cp); |
| 220 |
buf[0] = '\0'; |
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} |
| 222 |
/* load view names */ |
| 223 |
while ((cp = scan4var(buf, sizeof(buf), "view", fp)) != NULL) { |
| 224 |
if (nvn >= MAXVIEW) |
| 225 |
error(INTERNAL, "too many views in rad file"); |
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vwl[nvn++].nam = *cp == '-' ? (char *)NULL : |
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savqstr(atos(nam, sizeof(nam), cp)); |
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buf[0] = '\0'; |
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} |
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/* load actual views */ |
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do |
| 232 |
if (isview(buf)) { |
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vwl[nvv].v = (VIEW *)bmalloc(sizeof(VIEW)); |
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copystruct(vwl[nvv].v, &stdview); |
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sscanview(vwl[nvv].v, buf); |
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if ((cp = setview(vwl[nvv++].v)) != NULL) { |
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fprintf(stderr, "%s: bad view %d - %s\n", |
| 238 |
progname, nvv, cp); |
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quit(1); |
| 240 |
} |
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} |
| 242 |
while (fgets(buf, sizeof(buf), fp) != NULL); |
| 243 |
if (nvv != nvn) |
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error(INTERNAL, "view miscount in runrad"); |
| 245 |
pclose(fp); |
| 246 |
/* open options file */ |
| 247 |
if ((fp = fopen(optfile, "r")) == NULL) |
| 248 |
error(SYSTEM, "cannot open options file"); |
| 249 |
/* get ambient value */ |
| 250 |
while (fgets(buf, sizeof(buf), fp) != NULL) |
| 251 |
if (!strncmp(buf, "-av ", 4)) { |
| 252 |
setcolor(ambval, atof(buf+4), |
| 253 |
atof(sskip2(buf+4,1)), |
| 254 |
atof(sskip2(buf+4,2))); |
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break; |
| 256 |
} |
| 257 |
fclose(fp); |
| 258 |
unlink(optfile); /* delete options file */ |
| 259 |
} |
| 260 |
|
| 261 |
|
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int |
| 263 |
findvw(nm) /* find named view */ |
| 264 |
register char *nm; |
| 265 |
{ |
| 266 |
register int n; |
| 267 |
|
| 268 |
if (*nm >= '1' & *nm <= '9' && |
| 269 |
(n = atoi(nm)-1) <= MAXVIEW && vwl[n].v != NULL) |
| 270 |
return(n); |
| 271 |
for (n = 0; vwl[n].v != NULL; n++) |
| 272 |
if (vwl[n].nam != NULL && !strcmp(nm, vwl[n].nam)) |
| 273 |
return(n); |
| 274 |
return(-1); |
| 275 |
} |
| 276 |
|
| 277 |
|
| 278 |
int |
| 279 |
varmatch(s, vn) /* match line to variable */ |
| 280 |
register char *s, *vn; |
| 281 |
{ |
| 282 |
register int c; |
| 283 |
|
| 284 |
for ( ; *vn && *s == *vn; s++, vn++) |
| 285 |
; |
| 286 |
while (isspace(*s)) |
| 287 |
s++; |
| 288 |
if (*s == '=') |
| 289 |
return(*vn); |
| 290 |
while (!(c = toupper(*s++) - toupper(*vn)) && *vn++) |
| 291 |
; |
| 292 |
return(c); |
| 293 |
} |
| 294 |
|
| 295 |
|
| 296 |
char * |
| 297 |
scan4var(buf, buflen, vname, fp) /* scan for variable from fp */ |
| 298 |
char *buf; |
| 299 |
int buflen; |
| 300 |
char *vname; |
| 301 |
FILE *fp; |
| 302 |
{ |
| 303 |
int cval; |
| 304 |
register char *cp; |
| 305 |
/* search out matching line */ |
| 306 |
while ((cval = varmatch(buf, vname))) { |
| 307 |
if (cval > 0) /* gone too far? */ |
| 308 |
return(NULL); |
| 309 |
buf[0] = '\0'; /* else get next line */ |
| 310 |
if (fgetline(buf, buflen, fp) == NULL) |
| 311 |
return(NULL); |
| 312 |
} |
| 313 |
/* skip variable name and '=' */ |
| 314 |
for (cp = buf; *cp++ != '='; ) |
| 315 |
; |
| 316 |
while (isspace(*cp)) cp++; |
| 317 |
return(cp); |
| 318 |
} |
| 319 |
|
| 320 |
|
| 321 |
dev_open(id) /* initialize GLX driver */ |
| 322 |
char *id; |
| 323 |
{ |
| 324 |
static int atlBest[] = {GLX_RGBA, GLX_RED_SIZE,4, |
| 325 |
GLX_GREEN_SIZE,4, GLX_BLUE_SIZE,4, |
| 326 |
GLX_DOUBLEBUFFER, GLX_DEPTH_SIZE,15, None}; |
| 327 |
XSetWindowAttributes ourwinattr; |
| 328 |
XWMHints ourxwmhints; |
| 329 |
XSizeHints oursizhints; |
| 330 |
/* open display server */ |
| 331 |
ourdisplay = XOpenDisplay(NULL); |
| 332 |
if (ourdisplay == NULL) |
| 333 |
error(USER, "cannot open X-windows; DISPLAY variable set?\n"); |
| 334 |
/* find a usable visual */ |
| 335 |
ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlBest); |
| 336 |
if (ourvinf == NULL) |
| 337 |
error(USER, "no suitable visuals available"); |
| 338 |
/* get a context */ |
| 339 |
gctx = glXCreateContext(ourdisplay, ourvinf, NULL, GL_TRUE); |
| 340 |
/* open window */ |
| 341 |
ourwinattr.background_pixel = ourblack; |
| 342 |
ourwinattr.border_pixel = ourblack; |
| 343 |
ourwinattr.event_mask = ourmask; |
| 344 |
/* this is stupid */ |
| 345 |
ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot, |
| 346 |
ourvinf->visual, AllocNone); |
| 347 |
gwind = XCreateWindow(ourdisplay, ourroot, 0, 0, |
| 348 |
DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH, |
| 349 |
DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH, |
| 350 |
BORWIDTH, ourvinf->depth, InputOutput, ourvinf->visual, |
| 351 |
CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &ourwinattr); |
| 352 |
if (gwind == 0) |
| 353 |
error(SYSTEM, "cannot create window\n"); |
| 354 |
XStoreName(ourdisplay, gwind, id); |
| 355 |
/* set window manager hints */ |
| 356 |
ourxwmhints.flags = InputHint|IconPixmapHint; |
| 357 |
ourxwmhints.input = True; |
| 358 |
ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay, |
| 359 |
gwind, glradicon_bits, glradicon_width, glradicon_height); |
| 360 |
XSetWMHints(ourdisplay, gwind, &ourxwmhints); |
| 361 |
oursizhints.min_width = MINWIDTH; |
| 362 |
oursizhints.min_height = MINHEIGHT; |
| 363 |
oursizhints.flags = PMinSize; |
| 364 |
XSetNormalHints(ourdisplay, gwind, &oursizhints); |
| 365 |
/* set GLX context */ |
| 366 |
glXMakeCurrent(ourdisplay, gwind, gctx); |
| 367 |
glEnable(GL_DEPTH_TEST); |
| 368 |
glDepthFunc(GL_LESS); |
| 369 |
glShadeModel(GL_SMOOTH); |
| 370 |
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
| 371 |
glLightModelf(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE); |
| 372 |
glEnable(GL_LIGHTING); |
| 373 |
if (backvis) |
| 374 |
glDisable(GL_CULL_FACE); |
| 375 |
else { |
| 376 |
glFrontFace(GL_CCW); |
| 377 |
glCullFace(GL_BACK); |
| 378 |
glEnable(GL_CULL_FACE); |
| 379 |
} |
| 380 |
glDrawBuffer(GL_BACK); |
| 381 |
/* figure out sensible view */ |
| 382 |
pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) / |
| 383 |
DisplayWidth(ourdisplay, ourscreen); |
| 384 |
pheight = (double)DisplayHeightMM(ourdisplay, ourscreen) / |
| 385 |
DisplayHeight(ourdisplay, ourscreen); |
| 386 |
/* map the window */ |
| 387 |
XMapWindow(ourdisplay, gwind); |
| 388 |
rgl_checkerr("initializing GLX"); |
| 389 |
} |
| 390 |
|
| 391 |
|
| 392 |
dev_close() /* close our display and free resources */ |
| 393 |
{ |
| 394 |
glXMakeCurrent(ourdisplay, None, NULL); |
| 395 |
glXDestroyContext(ourdisplay, gctx); |
| 396 |
XDestroyWindow(ourdisplay, gwind); |
| 397 |
gwind = 0; |
| 398 |
XCloseDisplay(ourdisplay); |
| 399 |
ourdisplay = NULL; |
| 400 |
} |
| 401 |
|
| 402 |
|
| 403 |
int |
| 404 |
dev_view(nv) /* assign new driver view */ |
| 405 |
register VIEW *nv; |
| 406 |
{ |
| 407 |
int newhres = hres, newvres = vres; |
| 408 |
double wa, va; |
| 409 |
/* check view legality */ |
| 410 |
if (nv->type != VT_PER) { |
| 411 |
error(COMMAND, "illegal view type"); |
| 412 |
nv->type = VT_PER; |
| 413 |
} |
| 414 |
if (nv->horiz > 160. | nv->vert > 160.) { |
| 415 |
error(COMMAND, "illegal view angle"); |
| 416 |
if (nv->horiz > 160.) |
| 417 |
nv->horiz = 160.; |
| 418 |
if (nv->vert > 160.) |
| 419 |
nv->vert = 160.; |
| 420 |
} |
| 421 |
if (hres != 0 & vres != 0) { |
| 422 |
wa = (vres*pheight)/(hres*pwidth); |
| 423 |
va = viewaspect(nv); |
| 424 |
if (va > wa+.05) { |
| 425 |
newvres = (pwidth/pheight)*va*newhres + .5; |
| 426 |
if (newvres > maxvres) { |
| 427 |
newvres = maxvres; |
| 428 |
newhres = (pheight/pwidth)/va*newvres + .5; |
| 429 |
} |
| 430 |
} else if (va < wa-.05) { |
| 431 |
newhres = (pheight/pwidth)/va*newvres + .5; |
| 432 |
if (newhres > maxhres) { |
| 433 |
newhres = maxhres; |
| 434 |
newvres = (pwidth/pheight)*va*newhres + .5; |
| 435 |
} |
| 436 |
} |
| 437 |
if (newhres != hres | newvres != vres) { |
| 438 |
in_dev_view++; |
| 439 |
XResizeWindow(ourdisplay, gwind, newhres, newvres); |
| 440 |
do |
| 441 |
dev_input(0); /* get resize event */ |
| 442 |
while (newhres != hres | newvres != vres); |
| 443 |
in_dev_view--; |
| 444 |
} |
| 445 |
} |
| 446 |
copystruct(&thisview, nv); |
| 447 |
setglpersp(&thisview); |
| 448 |
render(); |
| 449 |
return(1); |
| 450 |
} |
| 451 |
|
| 452 |
|
| 453 |
int |
| 454 |
dev_input(nsecs) /* get next input event */ |
| 455 |
int nsecs; |
| 456 |
{ |
| 457 |
#if 0 |
| 458 |
static time_t lasttime = 0; |
| 459 |
time_t thistime; |
| 460 |
|
| 461 |
if (nsecs > 0) { |
| 462 |
thistime = time(0); |
| 463 |
nsecs -= (long)(thistime - lasttime); |
| 464 |
lasttime = thistime; |
| 465 |
} |
| 466 |
if (nsecs > 0) |
| 467 |
alarm(nsecs); |
| 468 |
#endif |
| 469 |
XNextEvent(ourdisplay, levptr(XEvent)); |
| 470 |
switch (levptr(XEvent)->type) { |
| 471 |
case ConfigureNotify: |
| 472 |
resizewindow(levptr(XConfigureEvent)); |
| 473 |
break; |
| 474 |
case UnmapNotify: |
| 475 |
mapped = 0; |
| 476 |
break; |
| 477 |
case MapNotify: |
| 478 |
mapped = 1; |
| 479 |
break; |
| 480 |
case Expose: |
| 481 |
fixwindow(levptr(XExposeEvent)); |
| 482 |
break; |
| 483 |
case KeyPress: |
| 484 |
return(getkey(levptr(XKeyPressedEvent))); |
| 485 |
case ButtonPress: |
| 486 |
getmove(levptr(XButtonPressedEvent)); |
| 487 |
break; |
| 488 |
} |
| 489 |
return(1); |
| 490 |
} |
| 491 |
|
| 492 |
|
| 493 |
render() /* render our display list and swap buffers */ |
| 494 |
{ |
| 495 |
if (!mapped) |
| 496 |
return; |
| 497 |
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); |
| 498 |
glCallList(displist); |
| 499 |
glXSwapBuffers(ourdisplay, gwind); /* calls glFlush() */ |
| 500 |
rgl_checkerr("rendering display list"); |
| 501 |
} |
| 502 |
|
| 503 |
|
| 504 |
moveview(dx, dy, mov, orb) /* move our view */ |
| 505 |
int dx, dy, mov, orb; |
| 506 |
{ |
| 507 |
VIEW nv; |
| 508 |
FVECT odir, v1, wp; |
| 509 |
double d; |
| 510 |
register int li; |
| 511 |
/* start with old view */ |
| 512 |
copystruct(&nv, &thisview); |
| 513 |
/* change view direction */ |
| 514 |
if ((d = viewray(v1, odir, &thisview, |
| 515 |
(dx+.5)/hres, (dy+.5)/vres)) < -FTINY) |
| 516 |
return(0); /* outside view */ |
| 517 |
if (mov | orb) { |
| 518 |
if (!getintersect(wp, v1, odir, d)) |
| 519 |
return(0); |
| 520 |
VSUM(odir, wp, nv.vp, -1.); |
| 521 |
} else |
| 522 |
VCOPY(nv.vdir, odir); |
| 523 |
if (orb && mov) { /* orbit left/right */ |
| 524 |
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov); |
| 525 |
VSUM(nv.vp, wp, odir, -1.); |
| 526 |
spinvector(nv.vdir, nv.vdir, nv.vup, d); |
| 527 |
} else if (orb) { /* orbit up/down */ |
| 528 |
fcross(v1, odir, nv.vup); |
| 529 |
if (normalize(v1) == 0.) |
| 530 |
return(0); |
| 531 |
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb); |
| 532 |
VSUM(nv.vp, wp, odir, -1.); |
| 533 |
spinvector(nv.vdir, nv.vdir, v1, d); |
| 534 |
} else if (mov) { /* move forward/backward */ |
| 535 |
d = MOVPCT/100. * mov; |
| 536 |
VSUM(nv.vp, nv.vp, odir, d); |
| 537 |
} |
| 538 |
if (!mov ^ !orb && headlocked) { /* restore head height */ |
| 539 |
VSUM(v1, thisview.vp, nv.vp, -1.); |
| 540 |
d = DOT(v1, thisview.vup); |
| 541 |
VSUM(nv.vp, nv.vp, thisview.vup, d); |
| 542 |
} |
| 543 |
if (setview(&nv) != NULL) |
| 544 |
return(0); /* illegal view */ |
| 545 |
dev_view(&nv); |
| 546 |
return(1); |
| 547 |
} |
| 548 |
|
| 549 |
|
| 550 |
getmove(ebut) /* get view change */ |
| 551 |
XButtonPressedEvent *ebut; |
| 552 |
{ |
| 553 |
int movdir = MOVDIR(ebut->button); |
| 554 |
int movorb = MOVORB(ebut->state); |
| 555 |
int moved = 0; |
| 556 |
Window rootw, childw; |
| 557 |
int rootx, rooty, wx, wy; |
| 558 |
unsigned int statemask; |
| 559 |
|
| 560 |
copylastv("moving"); |
| 561 |
XNoOp(ourdisplay); |
| 562 |
|
| 563 |
while (!XCheckMaskEvent(ourdisplay, |
| 564 |
ButtonReleaseMask, levptr(XEvent))) { |
| 565 |
|
| 566 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
| 567 |
&rootx, &rooty, &wx, &wy, &statemask)) |
| 568 |
break; /* on another screen */ |
| 569 |
|
| 570 |
if (!moveview(wx, vres-1-wy, movdir, movorb)) { |
| 571 |
sleep(1); |
| 572 |
continue; |
| 573 |
} else |
| 574 |
moved++; |
| 575 |
} |
| 576 |
if (!moved) { /* do final motion */ |
| 577 |
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
| 578 |
wx = levptr(XButtonReleasedEvent)->x; |
| 579 |
wy = levptr(XButtonReleasedEvent)->y; |
| 580 |
moveview(wx, vres-1-wy, movdir, movorb); |
| 581 |
} |
| 582 |
} |
| 583 |
|
| 584 |
|
| 585 |
getintersect(wp, org, dir, md) /* intersect ray with scene geometry */ |
| 586 |
FVECT wp; /* returned world intersection point */ |
| 587 |
FVECT org, dir; |
| 588 |
double md; |
| 589 |
{ |
| 590 |
float fbuf[6]; |
| 591 |
/* check to see if rtrace is running */ |
| 592 |
if (rtpd[2] <= 0) |
| 593 |
return(0); |
| 594 |
/* assign origin */ |
| 595 |
fbuf[0] = org[0]; fbuf[1] = org[1]; fbuf[2] = org[2]; |
| 596 |
/* compute clipping distance */ |
| 597 |
if (md <= FTINY) md = FHUGE; |
| 598 |
fbuf[3] = dir[0]*md; fbuf[4] = dir[1]*md; fbuf[5] = dir[2]*md; |
| 599 |
/* trace that ray */ |
| 600 |
if (process(rtpd, fbuf, fbuf, 4*sizeof(float), 6*sizeof(float)) != |
| 601 |
4*sizeof(float)) |
| 602 |
error(INTERNAL, "error getting data back from rtrace process"); |
| 603 |
if (fbuf[3] >= .99*FHUGE) |
| 604 |
return(0); /* missed local objects */ |
| 605 |
wp[0] = fbuf[0]; wp[1] = fbuf[1]; wp[2] = fbuf[2]; |
| 606 |
return(1); /* else return world intersection */ |
| 607 |
} |
| 608 |
|
| 609 |
|
| 610 |
setglpersp(vp) /* set perspective view in GL */ |
| 611 |
register VIEW *vp; |
| 612 |
{ |
| 613 |
double d, xmin, xmax, ymin, ymax, zmin, zmax; |
| 614 |
|
| 615 |
zmin = 0.1; |
| 616 |
zmax = 1000.; |
| 617 |
if (thisview.vfore > FTINY) |
| 618 |
zmin = thisview.vfore; |
| 619 |
if (thisview.vaft > FTINY) |
| 620 |
zmax = thisview.vaft; |
| 621 |
xmax = zmin * tan(PI/180./2. * thisview.horiz); |
| 622 |
xmin = -xmax; |
| 623 |
d = thisview.hoff * (xmax - xmin); |
| 624 |
xmin += d; xmax += d; |
| 625 |
ymax = zmin * tan(PI/180./2. * thisview.vert); |
| 626 |
ymin = -ymax; |
| 627 |
d = thisview.voff * (ymax - ymin); |
| 628 |
ymin += d; ymax += d; |
| 629 |
/* set view matrix */ |
| 630 |
glMatrixMode(GL_PROJECTION); |
| 631 |
glLoadIdentity(); |
| 632 |
glFrustum(xmin, xmax, ymin, ymax, zmin, zmax); |
| 633 |
gluLookAt(thisview.vp[0], thisview.vp[1], thisview.vp[2], |
| 634 |
thisview.vp[0] + thisview.vdir[0], |
| 635 |
thisview.vp[1] + thisview.vdir[1], |
| 636 |
thisview.vp[2] + thisview.vdir[2], |
| 637 |
thisview.vup[0], thisview.vup[1], thisview.vup[2]); |
| 638 |
rgl_checkerr("setting perspective view"); |
| 639 |
} |
| 640 |
|
| 641 |
|
| 642 |
int |
| 643 |
getkey(ekey) /* get input key */ |
| 644 |
register XKeyPressedEvent *ekey; |
| 645 |
{ |
| 646 |
int n; |
| 647 |
char buf[8]; |
| 648 |
|
| 649 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
| 650 |
if (n != 1) |
| 651 |
return(1); |
| 652 |
switch (buf[0]) { |
| 653 |
case 'h': /* turn on height motion lock */ |
| 654 |
headlocked = 1; |
| 655 |
break; |
| 656 |
case 'H': /* turn off height motion lock */ |
| 657 |
headlocked = 0; |
| 658 |
break; |
| 659 |
case 'l': /* retrieve last (premouse) view */ |
| 660 |
if (lastview.type) { |
| 661 |
VIEW vtmp; |
| 662 |
copystruct(&vtmp, &thisview); |
| 663 |
dev_view(&lastview); |
| 664 |
copystruct(&lastview, &vtmp); |
| 665 |
} else |
| 666 |
XBell(ourdisplay, 0); |
| 667 |
break; |
| 668 |
case 'n': /* move to next standard view */ |
| 669 |
gotoview(currentview+1); |
| 670 |
break; |
| 671 |
case 'p': /* move to last standard view */ |
| 672 |
gotoview(currentview-1); |
| 673 |
break; |
| 674 |
case '+': /* zoom in */ |
| 675 |
zoomview(100+ZOOMPCT, ekey->x, vres-1-ekey->y); |
| 676 |
break; |
| 677 |
case '-': /* zoom out */ |
| 678 |
zoomview(100-ZOOMPCT, ekey->x, vres-1-ekey->y); |
| 679 |
break; |
| 680 |
case 'v': /* spit current view to stdout */ |
| 681 |
fputs(VIEWSTR, stdout); |
| 682 |
fprintview(&thisview, stdout); |
| 683 |
fputc('\n', stdout); |
| 684 |
break; |
| 685 |
case 'V': /* append view to rad file */ |
| 686 |
appendview(NULL, &thisview); |
| 687 |
break; |
| 688 |
case 'q': /* quit the program */ |
| 689 |
return(0); |
| 690 |
default: |
| 691 |
XBell(ourdisplay, 0); |
| 692 |
break; |
| 693 |
} |
| 694 |
return(1); |
| 695 |
} |
| 696 |
|
| 697 |
|
| 698 |
zoomview(pct, dx, dy) /* zoom in or out around (dx,dy) */ |
| 699 |
int pct; |
| 700 |
int dx, dy; |
| 701 |
{ |
| 702 |
double h, v; |
| 703 |
FVECT direc; |
| 704 |
|
| 705 |
if (pct == 100 | pct <= 0) |
| 706 |
return; |
| 707 |
copylastv("zooming"); |
| 708 |
h = (dx+.5)/hres - 0.5; |
| 709 |
v = (dy+.5)/vres - 0.5; |
| 710 |
h *= (1. - 100./pct); |
| 711 |
v *= (1. - 100./pct); |
| 712 |
thisview.vdir[0] += h*thisview.hvec[0] + v*thisview.vvec[0]; |
| 713 |
thisview.vdir[1] += h*thisview.hvec[1] + v*thisview.vvec[1]; |
| 714 |
thisview.vdir[2] += h*thisview.hvec[2] + v*thisview.vvec[2]; |
| 715 |
thisview.horiz = 2.*180./PI * atan( 100./pct * |
| 716 |
tan(PI/180./2.*thisview.horiz) ); |
| 717 |
thisview.vert = 2.*180./PI * atan( 100./pct * |
| 718 |
tan(PI/180./2.*thisview.vert) ); |
| 719 |
setview(&thisview); |
| 720 |
dev_view(&thisview); |
| 721 |
} |
| 722 |
|
| 723 |
|
| 724 |
gotoview(vwnum) /* go to specified view number */ |
| 725 |
int vwnum; |
| 726 |
{ |
| 727 |
if (vwnum < 0) |
| 728 |
for (vwnum = currentview; vwl[vwnum+1].v != NULL; vwnum++) |
| 729 |
; |
| 730 |
else if (vwnum >= MAXVIEW || vwl[vwnum].v == NULL) |
| 731 |
vwnum = 0; |
| 732 |
if (vwnum == currentview) |
| 733 |
return; |
| 734 |
/* copylastv("change view"); */ |
| 735 |
dev_view(vwl[currentview=vwnum].v); |
| 736 |
} |
| 737 |
|
| 738 |
|
| 739 |
appendview(nm, vp) /* append standard view */ |
| 740 |
char *nm; |
| 741 |
VIEW *vp; |
| 742 |
{ |
| 743 |
FILE *fp; |
| 744 |
/* check if already in there */ |
| 745 |
if (!bcmp(&thisview, vwl[currentview].v, sizeof(VIEW))) { |
| 746 |
error(COMMAND, "view already in standard list"); |
| 747 |
return; |
| 748 |
} |
| 749 |
/* append to file */ |
| 750 |
if ((fp = fopen(radfile, "a")) == NULL) { |
| 751 |
error(COMMAND, "cannot append rad input file"); |
| 752 |
return; |
| 753 |
} |
| 754 |
fputs("view=", fp); |
| 755 |
if (nm != NULL) { |
| 756 |
fputc(' ', fp); fputs(nm, fp); |
| 757 |
} |
| 758 |
fprintview(vp, fp); fputc('\n', fp); |
| 759 |
fclose(fp); |
| 760 |
/* append to our list */ |
| 761 |
while (vwl[currentview].v != NULL) |
| 762 |
currentview++; |
| 763 |
if (currentview >= MAXVIEW) |
| 764 |
error(INTERNAL, "too many views in appendview"); |
| 765 |
vwl[currentview].v = (VIEW *)bmalloc(sizeof(VIEW)); |
| 766 |
copystruct(vwl[currentview].v, &thisview); |
| 767 |
if (nm != NULL) |
| 768 |
vwl[currentview].nam = savqstr(nm); |
| 769 |
} |
| 770 |
|
| 771 |
|
| 772 |
copylastv(cause) /* copy last view position */ |
| 773 |
char *cause; |
| 774 |
{ |
| 775 |
static char *lastvc; |
| 776 |
|
| 777 |
if (cause == lastvc) |
| 778 |
return; /* only record one view per cause */ |
| 779 |
lastvc = cause; |
| 780 |
copystruct(&lastview, &thisview); |
| 781 |
} |
| 782 |
|
| 783 |
|
| 784 |
fixwindow(eexp) /* repair damage to window */ |
| 785 |
register XExposeEvent *eexp; |
| 786 |
{ |
| 787 |
if (hres == 0 | vres == 0) { /* first exposure */ |
| 788 |
resizewindow((XConfigureEvent *)eexp); |
| 789 |
return; |
| 790 |
} |
| 791 |
if (eexp->count) /* wait for final exposure */ |
| 792 |
return; |
| 793 |
/* rerender everything */ |
| 794 |
render(); |
| 795 |
} |
| 796 |
|
| 797 |
|
| 798 |
resizewindow(ersz) /* resize window */ |
| 799 |
register XConfigureEvent *ersz; |
| 800 |
{ |
| 801 |
static char resizing[] = "resizing window"; |
| 802 |
double wa, va; |
| 803 |
|
| 804 |
glViewport(0, 0, hres=ersz->width, vres=ersz->height); |
| 805 |
if (hres > maxhres) maxhres = hres; |
| 806 |
if (vres > maxvres) maxvres = vres; |
| 807 |
if (in_dev_view) |
| 808 |
return; |
| 809 |
wa = (vres*pheight)/(hres*pwidth); |
| 810 |
va = viewaspect(&thisview); |
| 811 |
if (va > wa+.05) { |
| 812 |
copylastv(resizing); |
| 813 |
thisview.vert = 2.*180./PI * |
| 814 |
atan( tan(PI/180./2. * thisview.horiz) * wa ); |
| 815 |
} else if (va < wa-.05) { |
| 816 |
copylastv(resizing); |
| 817 |
thisview.horiz = 2.*180./PI * |
| 818 |
atan( tan(PI/180./2. * thisview.vert) / wa ); |
| 819 |
} else |
| 820 |
return; |
| 821 |
setview(&thisview); |
| 822 |
dev_view(&thisview); |
| 823 |
} |
