| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: glrad.c,v 3.24 2016/04/25 02:04:22 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Program to display Radiance scene using OpenGL. |
| 6 |
*/ |
| 7 |
|
| 8 |
#include <sys/types.h> |
| 9 |
#include <GL/glx.h> |
| 10 |
#ifndef NOSTEREO |
| 11 |
#include <X11/extensions/SGIStereo.h> |
| 12 |
#endif |
| 13 |
#include <ctype.h> |
| 14 |
#include <string.h> |
| 15 |
#include <time.h> |
| 16 |
|
| 17 |
#include "radogl.h" |
| 18 |
#include "view.h" |
| 19 |
#include "paths.h" |
| 20 |
#include "glradicon.h" |
| 21 |
#include "rtprocess.h" |
| 22 |
|
| 23 |
#ifndef MAXVIEW |
| 24 |
#define MAXVIEW 63 /* maximum number of standard views */ |
| 25 |
#endif |
| 26 |
#ifndef MAXSCENE |
| 27 |
#define MAXSCENE 127 /* maximum number of scene files */ |
| 28 |
#endif |
| 29 |
|
| 30 |
#define ZOOMPCT 9 /* percent to zoom at a time */ |
| 31 |
|
| 32 |
#define MOVPCT 4 /* percent distance to move /frame */ |
| 33 |
#define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1) |
| 34 |
#define MOVDEG (-1.5) /* degrees to orbit CW/down /frame */ |
| 35 |
#define MOVORB(s) ((s)&ShiftMask ? 1 : (s)&ControlMask ? -1 : 0) |
| 36 |
|
| 37 |
#define BORWIDTH 5 /* border width */ |
| 38 |
|
| 39 |
#define ourscreen DefaultScreen(ourdisplay) |
| 40 |
#define ourroot RootWindow(ourdisplay,ourscreen) |
| 41 |
#define ourmask (StructureNotifyMask|ExposureMask|KeyPressMask|\ |
| 42 |
ButtonPressMask|ButtonReleaseMask) |
| 43 |
|
| 44 |
#define levptr(etype) ((etype *)¤tevent) |
| 45 |
|
| 46 |
XEvent currentevent; /* current event */ |
| 47 |
|
| 48 |
int mapped = 0; /* window is mapped? */ |
| 49 |
unsigned long ourblack=0, ourwhite=~0; |
| 50 |
|
| 51 |
Display *ourdisplay = NULL; /* our display */ |
| 52 |
XVisualInfo *ourvinf; /* our visual information */ |
| 53 |
Window gwind = 0; /* our graphics window */ |
| 54 |
int hres, vres; /* rendering window dimensions */ |
| 55 |
int maxhres, maxvres; /* maximum given dimensions */ |
| 56 |
GLXContext gctx; /* our GLX context */ |
| 57 |
|
| 58 |
double pwidth, pheight; /* pixel dimensions (mm) */ |
| 59 |
|
| 60 |
int headlocked = 0; /* lock vertical motion */ |
| 61 |
|
| 62 |
struct { |
| 63 |
char *nam; /* view name (NULL if none) */ |
| 64 |
VIEW *v; /* parameters (NULL term.) */ |
| 65 |
} vwl[MAXVIEW+1]; /* our list of views */ |
| 66 |
|
| 67 |
int currentview = 0; /* current view number */ |
| 68 |
VIEW thisview = STDVIEW; /* displayed view */ |
| 69 |
double eyedist = 1; /* interocular distance */ |
| 70 |
VIEW lastview; /* last recorded view */ |
| 71 |
|
| 72 |
char *progname; /* global argv[0] */ |
| 73 |
char *radfile; /* rad input file */ |
| 74 |
char *scene[MAXSCENE+1]; /* material and scene file list */ |
| 75 |
int nscenef = 0; /* number of scene files */ |
| 76 |
char *octree; /* octree name (NULL if unnec.) */ |
| 77 |
|
| 78 |
SUBPROC rtpd; /* rtrace process descriptors */ |
| 79 |
|
| 80 |
int silent = 0; /* run rad silently? */ |
| 81 |
int backvis = 1; /* back faces visible? */ |
| 82 |
int stereo = 0; /* do stereo? */ |
| 83 |
|
| 84 |
#ifdef NOSTEREO |
| 85 |
#define setstereobuf(bid) |
| 86 |
#else |
| 87 |
#define setstereobuf(bid) (glXWaitGL(), \ |
| 88 |
XSGISetStereoBuffer(ourdisplay, gwind, bid), \ |
| 89 |
glXWaitX()) |
| 90 |
#endif |
| 91 |
|
| 92 |
int displist; /* our scene display list */ |
| 93 |
|
| 94 |
int no_render = 0; /* don't rerender */ |
| 95 |
|
| 96 |
extern int nowarn; /* turn warnings off? */ |
| 97 |
|
| 98 |
static void startrtrace(char *octname); |
| 99 |
static void runrad(int ac, char **av); |
| 100 |
static int findvw(char *nm); |
| 101 |
static int varmatch(char *s, char *vn); |
| 102 |
static char * scan4var(char *buf, int buflen, char *vname, FILE *fp); |
| 103 |
static void dev_open(char *id); |
| 104 |
static void dev_close(void); |
| 105 |
static int dev_view(VIEW *nv); |
| 106 |
static int dev_input(int nsecs); |
| 107 |
static void render(void); |
| 108 |
static int moveview(int dx, int dy, int mov, int orb); |
| 109 |
static void waitabit(void); |
| 110 |
static void getmove(XButtonPressedEvent *ebut); |
| 111 |
static int getintersect(FVECT wp, FVECT org, FVECT dir, double md); |
| 112 |
static void setglpersp(VIEW *vp); |
| 113 |
static int getkey(XKeyPressedEvent *ekey); |
| 114 |
static void zoomview(int pct, int dx, int dy); |
| 115 |
static void gotoview(int vwnum); |
| 116 |
static void appendview(char *nm, VIEW *vp); |
| 117 |
static void copylastv(char *cause); |
| 118 |
static void fixwindow(XExposeEvent *eexp); |
| 119 |
static void resizewindow(XConfigureEvent *ersz); |
| 120 |
|
| 121 |
|
| 122 |
int |
| 123 |
main( |
| 124 |
int argc, |
| 125 |
char *argv[] |
| 126 |
) |
| 127 |
{ |
| 128 |
char *viewsel = NULL; |
| 129 |
long vwintvl = 0; |
| 130 |
int i; |
| 131 |
|
| 132 |
progname = argv[0]; |
| 133 |
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
| 134 |
switch (argv[i][1]) { |
| 135 |
case 'v': |
| 136 |
viewsel = argv[++i]; |
| 137 |
break; |
| 138 |
case 'w': |
| 139 |
nowarn = !nowarn; |
| 140 |
break; |
| 141 |
case 's': |
| 142 |
silent = !silent; |
| 143 |
break; |
| 144 |
case 'S': |
| 145 |
stereo = !stereo; |
| 146 |
break; |
| 147 |
case 'c': |
| 148 |
vwintvl = atoi(argv[++i]); |
| 149 |
break; |
| 150 |
case 'b': |
| 151 |
backvis = !backvis; |
| 152 |
break; |
| 153 |
default: |
| 154 |
goto userr; |
| 155 |
} |
| 156 |
if (i >= argc) |
| 157 |
goto userr; |
| 158 |
#ifdef NOSTEREO |
| 159 |
if (stereo) |
| 160 |
error(INTERNAL, "stereo not supported in this version"); |
| 161 |
#endif |
| 162 |
/* run rad and get views */ |
| 163 |
runrad(argc-i, argv+i); |
| 164 |
/* check view */ |
| 165 |
if (viewsel != NULL) { |
| 166 |
if (viewsel[0] == '-') { |
| 167 |
char *ve = viewsel; |
| 168 |
if (!sscanview(&thisview, viewsel) || |
| 169 |
(ve = setview(&thisview)) != NULL) { |
| 170 |
fprintf(stderr, "%s: bad view: %s\n", |
| 171 |
progname, ve); |
| 172 |
quit(1); |
| 173 |
} |
| 174 |
currentview = -1; |
| 175 |
} else if ((currentview = findvw(viewsel)) < 0) { |
| 176 |
fprintf(stderr, "%s: no such view: %s\n", |
| 177 |
progname, viewsel); |
| 178 |
quit(1); |
| 179 |
} |
| 180 |
} |
| 181 |
/* open GL */ |
| 182 |
dev_open(radfile = argv[i]); |
| 183 |
/* load octree or scene files */ |
| 184 |
if (octree != NULL) { |
| 185 |
displist = rgl_octlist(octree, NULL, NULL, NULL); |
| 186 |
startrtrace(octree); |
| 187 |
} else |
| 188 |
displist = rgl_filelist(nscenef, scene, NULL); |
| 189 |
/* set initial view */ |
| 190 |
dev_view(currentview < 0 ? &thisview : vwl[currentview].v); |
| 191 |
/* input/render loop */ |
| 192 |
while (dev_input(vwintvl)) |
| 193 |
; |
| 194 |
/* all done */ |
| 195 |
quit(0); |
| 196 |
userr: |
| 197 |
fprintf(stderr, |
| 198 |
"Usage: %s [-w][-s][-b][-S][-v view] rfile [VAR=value]..\n", |
| 199 |
argv[0]); |
| 200 |
quit(1); |
| 201 |
return 1; /* pro forma return */ |
| 202 |
} |
| 203 |
|
| 204 |
|
| 205 |
void |
| 206 |
quit( /* exit gracefully */ |
| 207 |
int code |
| 208 |
) |
| 209 |
{ |
| 210 |
if (ourdisplay != NULL) |
| 211 |
dev_close(); |
| 212 |
/* if (rtpd.pid > 0) { */ |
| 213 |
if (rtpd.running) { |
| 214 |
if (close_process(&rtpd) > 0) |
| 215 |
wputs("bad exit status from rtrace\n"); |
| 216 |
/* rtpd.pid = 0; */ |
| 217 |
} |
| 218 |
exit(code); |
| 219 |
} |
| 220 |
|
| 221 |
|
| 222 |
static void |
| 223 |
startrtrace( /* start rtrace on octname */ |
| 224 |
char *octname |
| 225 |
) |
| 226 |
{ |
| 227 |
static char *av[12] = {"rtrace", "-h", "-fff", "-ld+", |
| 228 |
"-opL", "-x", "1"}; |
| 229 |
int ac = 7; |
| 230 |
|
| 231 |
if (nowarn) av[ac++] = "-w-"; |
| 232 |
av[ac++] = octname; |
| 233 |
av[ac] = NULL; |
| 234 |
if (open_process(&rtpd, av) <= 0) |
| 235 |
error(SYSTEM, "cannot start rtrace process"); |
| 236 |
} |
| 237 |
|
| 238 |
|
| 239 |
static void |
| 240 |
runrad( /* run rad and load variables */ |
| 241 |
int ac, |
| 242 |
char **av |
| 243 |
) |
| 244 |
{ |
| 245 |
static char optfile[] = TEMPLATE; |
| 246 |
int nvn = 0, nvv = 0; |
| 247 |
FILE *fp; |
| 248 |
char *cp; |
| 249 |
char radcomm[256], buf[128], nam[32]; |
| 250 |
/* set rad commmand */ |
| 251 |
strcpy(radcomm, "rad -w -v 0 "); /* look out below! */ |
| 252 |
cp = radcomm + 19; |
| 253 |
if (silent) { |
| 254 |
strcpy(cp, "-s "); |
| 255 |
cp += 3; |
| 256 |
} |
| 257 |
while (ac--) { |
| 258 |
strcpy(cp, *av++); |
| 259 |
while (*cp) cp++; |
| 260 |
*cp++ = ' '; |
| 261 |
} |
| 262 |
strcpy(cp, "OPTFILE="); /* create temporary options file */ |
| 263 |
strcpy(cp+8, mktemp(optfile)); |
| 264 |
if (system(radcomm)) /* update octree */ |
| 265 |
error(USER, "error executing rad command"); |
| 266 |
/* replace "-v 0" with "-n -e -s -V" */ |
| 267 |
strcpy(radcomm+7, "-n -e -s -V"); |
| 268 |
radcomm[18] = ' '; |
| 269 |
if ((fp = popen(radcomm, "r")) == NULL) |
| 270 |
error(SYSTEM, "cannot start rad command"); |
| 271 |
buf[0] = '\0'; /* read variables alphabetically */ |
| 272 |
/* get exposure */ |
| 273 |
if ((cp = scan4var(buf, sizeof(buf), "EXPOSURE", fp)) != NULL) { |
| 274 |
expval = atof(cp); |
| 275 |
if ((*cp == '-') | (*cp == '+')) |
| 276 |
expval = pow(2., expval); |
| 277 |
expval *= 0.5; /* compensate for local shading */ |
| 278 |
} |
| 279 |
/* look for eye separation */ |
| 280 |
if ((cp = scan4var(buf, sizeof(buf), "EYESEP", fp)) != NULL) |
| 281 |
eyedist = atof(cp); |
| 282 |
/* look for materials */ |
| 283 |
while ((cp = scan4var(buf, sizeof(buf), "materials", fp)) != NULL) { |
| 284 |
nscenef += wordstring(scene+nscenef, MAXSCENE-nscenef, cp); |
| 285 |
buf[0] = '\0'; |
| 286 |
} |
| 287 |
/* look for octree */ |
| 288 |
if ((cp = scan4var(buf, sizeof(buf), "OCTREE", fp)) != NULL) |
| 289 |
octree = savqstr(cp); |
| 290 |
/* look for scene files */ |
| 291 |
while ((cp = scan4var(buf, sizeof(buf), "scene", fp)) != NULL) { |
| 292 |
nscenef += wordstring(scene+nscenef, MAXSCENE-nscenef, cp); |
| 293 |
buf[0] = '\0'; |
| 294 |
} |
| 295 |
/* load view names */ |
| 296 |
while ((cp = scan4var(buf, sizeof(buf), "view", fp)) != NULL) { |
| 297 |
if (nvn >= MAXVIEW) |
| 298 |
error(INTERNAL, "too many views in rad file"); |
| 299 |
vwl[nvn++].nam = *cp == '-' ? (char *)NULL : |
| 300 |
savqstr(atos(nam, sizeof(nam), cp)); |
| 301 |
buf[0] = '\0'; |
| 302 |
} |
| 303 |
/* load actual views */ |
| 304 |
do |
| 305 |
if (isview(buf)) { |
| 306 |
vwl[nvv].v = (VIEW *)bmalloc(sizeof(VIEW)); |
| 307 |
*(vwl[nvv].v) = stdview; |
| 308 |
sscanview(vwl[nvv].v, buf); |
| 309 |
if ((cp = setview(vwl[nvv++].v)) != NULL) { |
| 310 |
fprintf(stderr, "%s: bad view %d - %s\n", |
| 311 |
progname, nvv, cp); |
| 312 |
quit(1); |
| 313 |
} |
| 314 |
} |
| 315 |
while (fgets(buf, sizeof(buf), fp) != NULL); |
| 316 |
if (nvv != nvn) |
| 317 |
error(INTERNAL, "view miscount in runrad"); |
| 318 |
pclose(fp); |
| 319 |
/* open options file */ |
| 320 |
if ((fp = fopen(optfile, "r")) == NULL) |
| 321 |
error(SYSTEM, "cannot open options file"); |
| 322 |
/* get relevant options */ |
| 323 |
while (fgets(buf, sizeof(buf), fp) != NULL) |
| 324 |
if (!strncmp(buf, "-av ", 4)) |
| 325 |
setcolor(ambval, atof(buf+4), |
| 326 |
atof(sskip2(buf+4,1)), |
| 327 |
atof(sskip2(buf+4,2))); |
| 328 |
else if (backvis && !strncmp(buf, "-bv", 3) && |
| 329 |
(!buf[3] || strchr("0-FfNn \n",buf[3])!=NULL)) |
| 330 |
backvis = 0; |
| 331 |
fclose(fp); |
| 332 |
unlink(optfile); /* delete options file */ |
| 333 |
} |
| 334 |
|
| 335 |
|
| 336 |
static int |
| 337 |
findvw( /* find named view */ |
| 338 |
char *nm |
| 339 |
) |
| 340 |
{ |
| 341 |
int n; |
| 342 |
|
| 343 |
if ((*nm >= '1') & (*nm <= '9') && |
| 344 |
(n = atoi(nm)-1) <= MAXVIEW && vwl[n].v != NULL) |
| 345 |
return(n); |
| 346 |
for (n = 0; vwl[n].v != NULL; n++) |
| 347 |
if (vwl[n].nam != NULL && !strcmp(nm, vwl[n].nam)) |
| 348 |
return(n); |
| 349 |
return(-1); |
| 350 |
} |
| 351 |
|
| 352 |
|
| 353 |
static int |
| 354 |
varmatch( /* match line to variable */ |
| 355 |
char *s, |
| 356 |
char *vn |
| 357 |
) |
| 358 |
{ |
| 359 |
int c; |
| 360 |
|
| 361 |
for ( ; *vn && *s == *vn; s++, vn++) |
| 362 |
; |
| 363 |
while (isspace(*s)) |
| 364 |
s++; |
| 365 |
if (*s == '=') |
| 366 |
return(*vn); |
| 367 |
while (!(c = toupper(*s++) - toupper(*vn)) && *vn++) |
| 368 |
; |
| 369 |
return(c); |
| 370 |
} |
| 371 |
|
| 372 |
|
| 373 |
static char * |
| 374 |
scan4var( /* scan for variable from fp */ |
| 375 |
char *buf, |
| 376 |
int buflen, |
| 377 |
char *vname, |
| 378 |
FILE *fp |
| 379 |
) |
| 380 |
{ |
| 381 |
int cval; |
| 382 |
char *cp; |
| 383 |
/* search out matching line */ |
| 384 |
while ((cval = varmatch(buf, vname))) { |
| 385 |
if (cval > 0) /* gone too far? */ |
| 386 |
return(NULL); |
| 387 |
buf[0] = '\0'; /* else get next line */ |
| 388 |
if (fgetline(buf, buflen, fp) == NULL) |
| 389 |
return(NULL); |
| 390 |
} |
| 391 |
/* skip variable name and '=' */ |
| 392 |
for (cp = buf; *cp++ != '='; ) |
| 393 |
; |
| 394 |
while (isspace(*cp)) cp++; |
| 395 |
return(cp); |
| 396 |
} |
| 397 |
|
| 398 |
|
| 399 |
static void |
| 400 |
dev_open( /* initialize GLX driver */ |
| 401 |
char *id |
| 402 |
) |
| 403 |
{ |
| 404 |
static int atlBest[] = {GLX_RGBA, GLX_RED_SIZE,4, |
| 405 |
GLX_GREEN_SIZE,4, GLX_BLUE_SIZE,4, |
| 406 |
GLX_DOUBLEBUFFER, GLX_DEPTH_SIZE,15, None}; |
| 407 |
XSetWindowAttributes ourwinattr; |
| 408 |
XWMHints ourxwmhints; |
| 409 |
/* open display server */ |
| 410 |
ourdisplay = XOpenDisplay(NULL); |
| 411 |
if (ourdisplay == NULL) |
| 412 |
error(USER, "cannot open X-windows; DISPLAY variable set?\n"); |
| 413 |
/* find a usable visual */ |
| 414 |
ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlBest); |
| 415 |
if (ourvinf == NULL) |
| 416 |
error(USER, "no suitable visuals available"); |
| 417 |
/* get a context */ |
| 418 |
gctx = glXCreateContext(ourdisplay, ourvinf, NULL, GL_TRUE); |
| 419 |
/* open window */ |
| 420 |
ourwinattr.background_pixel = ourblack; |
| 421 |
ourwinattr.border_pixel = ourblack; |
| 422 |
ourwinattr.event_mask = ourmask; |
| 423 |
/* this is stupid */ |
| 424 |
ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot, |
| 425 |
ourvinf->visual, AllocNone); |
| 426 |
gwind = XCreateWindow(ourdisplay, ourroot, 0, 0, |
| 427 |
DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH, |
| 428 |
DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH, |
| 429 |
BORWIDTH, ourvinf->depth, InputOutput, ourvinf->visual, |
| 430 |
CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &ourwinattr); |
| 431 |
if (gwind == 0) |
| 432 |
error(SYSTEM, "cannot create window\n"); |
| 433 |
XStoreName(ourdisplay, gwind, id); |
| 434 |
#ifndef NOSTEREO |
| 435 |
if (stereo) /* check if stereo working */ |
| 436 |
switch (XSGIQueryStereoMode(ourdisplay, gwind)) { |
| 437 |
case STEREO_TOP: |
| 438 |
case STEREO_BOTTOM: |
| 439 |
break; |
| 440 |
case STEREO_OFF: |
| 441 |
error(USER, |
| 442 |
"wrong video mode: run \"/usr/gfx/setmon -n STR_TOP\" first"); |
| 443 |
case X_STEREO_UNSUPPORTED: |
| 444 |
error(USER, "stereo not supported on this screen"); |
| 445 |
default: |
| 446 |
error(INTERNAL, "unknown stereo mode"); |
| 447 |
} |
| 448 |
#endif |
| 449 |
/* set window manager hints */ |
| 450 |
ourxwmhints.flags = InputHint|IconPixmapHint; |
| 451 |
ourxwmhints.input = True; |
| 452 |
ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay, gwind, |
| 453 |
(char *)glradicon_bits, glradicon_width, glradicon_height); |
| 454 |
XSetWMHints(ourdisplay, gwind, &ourxwmhints); |
| 455 |
/* set GLX context */ |
| 456 |
glXMakeCurrent(ourdisplay, gwind, gctx); |
| 457 |
glEnable(GL_DEPTH_TEST); |
| 458 |
glDepthFunc(GL_LESS); |
| 459 |
glShadeModel(GL_SMOOTH); |
| 460 |
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
| 461 |
glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE); |
| 462 |
glEnable(GL_LIGHTING); |
| 463 |
glFrontFace(GL_CCW); |
| 464 |
glCullFace(GL_BACK); |
| 465 |
if (backvis) |
| 466 |
glDisable(GL_CULL_FACE); |
| 467 |
else |
| 468 |
glEnable(GL_CULL_FACE); |
| 469 |
glDrawBuffer(GL_BACK); |
| 470 |
/* figure out sensible view */ |
| 471 |
pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) / |
| 472 |
DisplayWidth(ourdisplay, ourscreen); |
| 473 |
pheight = (double)DisplayHeightMM(ourdisplay, ourscreen) / |
| 474 |
DisplayHeight(ourdisplay, ourscreen); |
| 475 |
if (stereo) { /* set stereo mode */ |
| 476 |
setstereobuf(STEREO_BUFFER_LEFT); |
| 477 |
pheight *= 2.; |
| 478 |
} |
| 479 |
/* map the window */ |
| 480 |
XMapWindow(ourdisplay, gwind); |
| 481 |
no_render++; |
| 482 |
do |
| 483 |
dev_input(0); /* get resize event */ |
| 484 |
while ((hres == 0) & (vres == 0)); |
| 485 |
no_render--; |
| 486 |
rgl_checkerr("initializing GLX"); |
| 487 |
} |
| 488 |
|
| 489 |
|
| 490 |
static void |
| 491 |
dev_close(void) /* close our display and free resources */ |
| 492 |
{ |
| 493 |
glXMakeCurrent(ourdisplay, None, NULL); |
| 494 |
glXDestroyContext(ourdisplay, gctx); |
| 495 |
XDestroyWindow(ourdisplay, gwind); |
| 496 |
gwind = 0; |
| 497 |
XCloseDisplay(ourdisplay); |
| 498 |
ourdisplay = NULL; |
| 499 |
} |
| 500 |
|
| 501 |
|
| 502 |
static int |
| 503 |
dev_view( /* assign new driver view */ |
| 504 |
VIEW *nv |
| 505 |
) |
| 506 |
{ |
| 507 |
int newhres = hres, newvres = vres; |
| 508 |
double wa, va; |
| 509 |
/* check view legality */ |
| 510 |
if (nv->type != VT_PER) { |
| 511 |
error(COMMAND, "illegal view type"); |
| 512 |
nv->type = VT_PER; |
| 513 |
} |
| 514 |
if ((nv->horiz > 160.) | (nv->vert > 160.)) { |
| 515 |
error(COMMAND, "illegal view angle"); |
| 516 |
if (nv->horiz > 160.) |
| 517 |
nv->horiz = 160.; |
| 518 |
if (nv->vert > 160.) |
| 519 |
nv->vert = 160.; |
| 520 |
} |
| 521 |
if ((hres != 0) & (vres != 0)) { |
| 522 |
wa = (vres*pheight)/(hres*pwidth); |
| 523 |
va = viewaspect(nv); |
| 524 |
if (va > wa+.05) { |
| 525 |
newvres = (pwidth/pheight)*va*newhres + .5; |
| 526 |
if (newvres > maxvres) { |
| 527 |
newvres = maxvres; |
| 528 |
newhres = (pheight/pwidth)/va*newvres + .5; |
| 529 |
} |
| 530 |
} else if (va < wa-.05) { |
| 531 |
newhres = (pheight/pwidth)/va*newvres + .5; |
| 532 |
if (newhres > maxhres) { |
| 533 |
newhres = maxhres; |
| 534 |
newvres = (pwidth/pheight)*va*newhres + .5; |
| 535 |
} |
| 536 |
} |
| 537 |
if ((newhres != hres) | (newvres != vres)) { |
| 538 |
no_render++; |
| 539 |
XResizeWindow(ourdisplay, gwind, newhres, newvres); |
| 540 |
do |
| 541 |
dev_input(0); /* get resize event */ |
| 542 |
while ((newhres != hres) & (newvres != vres)); |
| 543 |
no_render--; |
| 544 |
} |
| 545 |
} |
| 546 |
thisview = *nv; |
| 547 |
setglpersp(&thisview); |
| 548 |
render(); |
| 549 |
return(1); |
| 550 |
} |
| 551 |
|
| 552 |
|
| 553 |
static int |
| 554 |
dev_input( /* get next input event */ |
| 555 |
int nsecs |
| 556 |
) |
| 557 |
{ |
| 558 |
#if 0 |
| 559 |
static time_t lasttime = 0; |
| 560 |
time_t thistime; |
| 561 |
|
| 562 |
if (nsecs > 0) { |
| 563 |
thistime = time(0); |
| 564 |
nsecs -= (long)(thistime - lasttime); |
| 565 |
lasttime = thistime; |
| 566 |
} |
| 567 |
if (nsecs > 0) |
| 568 |
alarm(nsecs); |
| 569 |
#endif |
| 570 |
XNextEvent(ourdisplay, levptr(XEvent)); |
| 571 |
switch (levptr(XEvent)->type) { |
| 572 |
case ConfigureNotify: |
| 573 |
resizewindow(levptr(XConfigureEvent)); |
| 574 |
break; |
| 575 |
case UnmapNotify: |
| 576 |
mapped = 0; |
| 577 |
break; |
| 578 |
case MapNotify: |
| 579 |
mapped = 1; |
| 580 |
break; |
| 581 |
case Expose: |
| 582 |
fixwindow(levptr(XExposeEvent)); |
| 583 |
break; |
| 584 |
case KeyPress: |
| 585 |
return(getkey(levptr(XKeyPressedEvent))); |
| 586 |
case ButtonPress: |
| 587 |
getmove(levptr(XButtonPressedEvent)); |
| 588 |
break; |
| 589 |
} |
| 590 |
return(1); |
| 591 |
} |
| 592 |
|
| 593 |
|
| 594 |
static void |
| 595 |
render(void) /* render our display list and swap buffers */ |
| 596 |
{ |
| 597 |
double d; |
| 598 |
|
| 599 |
if (!mapped | no_render) |
| 600 |
return; |
| 601 |
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); |
| 602 |
glCallList(displist); |
| 603 |
if (stereo) { /* do right eye for stereo */ |
| 604 |
setstereobuf(STEREO_BUFFER_RIGHT); |
| 605 |
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); |
| 606 |
glMatrixMode(GL_MODELVIEW); |
| 607 |
glPushMatrix(); |
| 608 |
d = -eyedist / sqrt(thisview.hn2); |
| 609 |
glTranslated(d*thisview.hvec[0], d*thisview.hvec[1], |
| 610 |
d*thisview.hvec[2]); |
| 611 |
glCallList(displist); |
| 612 |
glMatrixMode(GL_MODELVIEW); |
| 613 |
glPopMatrix(); |
| 614 |
setstereobuf(STEREO_BUFFER_LEFT); |
| 615 |
} |
| 616 |
glXSwapBuffers(ourdisplay, gwind); /* calls glFlush() */ |
| 617 |
rgl_checkerr("rendering display list"); |
| 618 |
} |
| 619 |
|
| 620 |
|
| 621 |
static int |
| 622 |
moveview( /* move our view */ |
| 623 |
int dx, |
| 624 |
int dy, |
| 625 |
int mov, |
| 626 |
int orb |
| 627 |
) |
| 628 |
{ |
| 629 |
VIEW nv; |
| 630 |
FVECT odir, v1, wp; |
| 631 |
double d; |
| 632 |
/* start with old view */ |
| 633 |
nv = thisview; |
| 634 |
/* change view direction */ |
| 635 |
if ((d = viewray(v1, odir, &thisview, |
| 636 |
(dx+.5)/hres, (dy+.5)/vres)) < -FTINY) |
| 637 |
return(0); /* outside view */ |
| 638 |
if (mov | orb) { |
| 639 |
if (!getintersect(wp, v1, odir, d)) |
| 640 |
return(0); |
| 641 |
VSUM(odir, wp, nv.vp, -1.); |
| 642 |
} else |
| 643 |
VCOPY(nv.vdir, odir); |
| 644 |
if (orb && mov) { /* orbit left/right */ |
| 645 |
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov); |
| 646 |
VSUM(nv.vp, wp, odir, -1.); |
| 647 |
spinvector(nv.vdir, nv.vdir, nv.vup, d); |
| 648 |
} else if (orb) { /* orbit up/down */ |
| 649 |
if (geodesic(odir, odir, nv.vup, |
| 650 |
d=MOVDEG*PI/180.*orb, GEOD_RAD) == 0.0) |
| 651 |
return(0); |
| 652 |
VSUM(nv.vp, wp, odir, -1.); |
| 653 |
geodesic(nv.vdir, nv.vdir, nv.vup, d, GEOD_RAD); |
| 654 |
} else if (mov) { /* move forward/backward */ |
| 655 |
d = MOVPCT/100. * mov; |
| 656 |
VSUM(nv.vp, nv.vp, odir, d); |
| 657 |
} |
| 658 |
if (!mov ^ !orb && headlocked) { /* restore head height */ |
| 659 |
VSUM(v1, thisview.vp, nv.vp, -1.); |
| 660 |
d = DOT(v1, thisview.vup); |
| 661 |
VSUM(nv.vp, nv.vp, thisview.vup, d); |
| 662 |
} |
| 663 |
if (setview(&nv) != NULL) |
| 664 |
return(0); /* illegal view */ |
| 665 |
dev_view(&nv); |
| 666 |
return(1); |
| 667 |
} |
| 668 |
|
| 669 |
|
| 670 |
static void |
| 671 |
waitabit(void) /* pause a moment */ |
| 672 |
{ |
| 673 |
struct timespec ts; |
| 674 |
ts.tv_sec = 0; |
| 675 |
ts.tv_nsec = 50000000; |
| 676 |
nanosleep(&ts, NULL); |
| 677 |
} |
| 678 |
|
| 679 |
|
| 680 |
static void |
| 681 |
getmove( /* get view change */ |
| 682 |
XButtonPressedEvent *ebut |
| 683 |
) |
| 684 |
{ |
| 685 |
int movdir = MOVDIR(ebut->button); |
| 686 |
int movorb = MOVORB(ebut->state); |
| 687 |
int moved = 0; |
| 688 |
Window rootw, childw; |
| 689 |
int rootx, rooty, wx, wy; |
| 690 |
unsigned int statemask; |
| 691 |
|
| 692 |
copylastv( movorb ? (movdir ? "left/right" : "up/down") : |
| 693 |
(movdir ? "fore/back" : "rotate") ); |
| 694 |
XNoOp(ourdisplay); |
| 695 |
|
| 696 |
while (!XCheckMaskEvent(ourdisplay, |
| 697 |
ButtonReleaseMask, levptr(XEvent))) { |
| 698 |
/* pause so as not to move too fast */ |
| 699 |
waitabit(); |
| 700 |
|
| 701 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
| 702 |
&rootx, &rooty, &wx, &wy, &statemask)) |
| 703 |
break; /* on another screen */ |
| 704 |
|
| 705 |
if (!moveview(wx, vres-1-wy, movdir, movorb)) { |
| 706 |
sleep(1); |
| 707 |
continue; |
| 708 |
} else |
| 709 |
moved++; |
| 710 |
} |
| 711 |
if (!moved) { /* do final motion */ |
| 712 |
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
| 713 |
wx = levptr(XButtonReleasedEvent)->x; |
| 714 |
wy = levptr(XButtonReleasedEvent)->y; |
| 715 |
moveview(wx, vres-1-wy, movdir, movorb); |
| 716 |
} |
| 717 |
} |
| 718 |
|
| 719 |
|
| 720 |
static int |
| 721 |
getintersect( /* intersect ray with scene geometry */ |
| 722 |
FVECT wp, /* returned world intersection point */ |
| 723 |
FVECT org, |
| 724 |
FVECT dir, |
| 725 |
double md |
| 726 |
) |
| 727 |
{ |
| 728 |
float fbuf[6]; |
| 729 |
/* check to see if rtrace is running */ |
| 730 |
/* if (rtpd.pid <= 0) */ |
| 731 |
if (!rtpd.running) |
| 732 |
return(0); |
| 733 |
/* assign origin */ |
| 734 |
fbuf[0] = org[0]; fbuf[1] = org[1]; fbuf[2] = org[2]; |
| 735 |
/* compute clipping distance */ |
| 736 |
if (md <= FTINY) md = FHUGE; |
| 737 |
fbuf[3] = dir[0]*md; fbuf[4] = dir[1]*md; fbuf[5] = dir[2]*md; |
| 738 |
/* trace that ray */ |
| 739 |
if (process(&rtpd, (char *)fbuf, (char *)fbuf, |
| 740 |
4*sizeof(float), 6*sizeof(float)) != 4*sizeof(float)) |
| 741 |
error(INTERNAL, "error getting data back from rtrace process"); |
| 742 |
if (fbuf[3] >= .99*FHUGE) |
| 743 |
return(0); /* missed local objects */ |
| 744 |
wp[0] = fbuf[0]; wp[1] = fbuf[1]; wp[2] = fbuf[2]; |
| 745 |
return(1); /* else return world intersection */ |
| 746 |
} |
| 747 |
|
| 748 |
|
| 749 |
static void |
| 750 |
setglpersp( /* set perspective view in GL */ |
| 751 |
VIEW *vp |
| 752 |
) |
| 753 |
{ |
| 754 |
double d, xmin, xmax, ymin, ymax, zmin, zmax; |
| 755 |
|
| 756 |
zmin = 0.1; |
| 757 |
zmax = 1000.; |
| 758 |
if (thisview.vfore > FTINY) |
| 759 |
zmin = thisview.vfore; |
| 760 |
if (thisview.vaft > FTINY) |
| 761 |
zmax = thisview.vaft; |
| 762 |
xmax = zmin * tan(PI/180./2. * thisview.horiz); |
| 763 |
xmin = -xmax; |
| 764 |
d = thisview.hoff * (xmax - xmin); |
| 765 |
xmin += d; xmax += d; |
| 766 |
ymax = zmin * tan(PI/180./2. * thisview.vert); |
| 767 |
ymin = -ymax; |
| 768 |
d = thisview.voff * (ymax - ymin); |
| 769 |
ymin += d; ymax += d; |
| 770 |
/* set view matrix */ |
| 771 |
glMatrixMode(GL_PROJECTION); |
| 772 |
glLoadIdentity(); |
| 773 |
glFrustum(xmin, xmax, ymin, ymax, zmin, zmax); |
| 774 |
gluLookAt(thisview.vp[0], thisview.vp[1], thisview.vp[2], |
| 775 |
thisview.vp[0] + thisview.vdir[0], |
| 776 |
thisview.vp[1] + thisview.vdir[1], |
| 777 |
thisview.vp[2] + thisview.vdir[2], |
| 778 |
thisview.vup[0], thisview.vup[1], thisview.vup[2]); |
| 779 |
rgl_checkerr("setting perspective view"); |
| 780 |
} |
| 781 |
|
| 782 |
|
| 783 |
static int |
| 784 |
getkey( /* get input key */ |
| 785 |
XKeyPressedEvent *ekey |
| 786 |
) |
| 787 |
{ |
| 788 |
int n; |
| 789 |
char buf[8]; |
| 790 |
|
| 791 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
| 792 |
if (n != 1) |
| 793 |
return(1); |
| 794 |
switch (buf[0]) { |
| 795 |
case 'h': /* turn on height motion lock */ |
| 796 |
headlocked = 1; |
| 797 |
break; |
| 798 |
case 'H': /* turn off height motion lock */ |
| 799 |
headlocked = 0; |
| 800 |
break; |
| 801 |
case 'l': /* retrieve last (premouse) view */ |
| 802 |
if (lastview.type) { |
| 803 |
VIEW vtmp; |
| 804 |
vtmp = thisview; |
| 805 |
dev_view(&lastview); |
| 806 |
lastview = vtmp; |
| 807 |
} else |
| 808 |
XBell(ourdisplay, 0); |
| 809 |
break; |
| 810 |
case 'n': /* move to next standard view */ |
| 811 |
gotoview(currentview+1); |
| 812 |
break; |
| 813 |
case 'p': /* move to last standard view */ |
| 814 |
gotoview(currentview-1); |
| 815 |
break; |
| 816 |
case '+': /* zoom in */ |
| 817 |
zoomview(100+ZOOMPCT, ekey->x, vres-1-ekey->y); |
| 818 |
break; |
| 819 |
case '-': /* zoom out */ |
| 820 |
zoomview(100-ZOOMPCT, ekey->x, vres-1-ekey->y); |
| 821 |
break; |
| 822 |
case 'v': /* spit current view to stdout */ |
| 823 |
fputs(VIEWSTR, stdout); |
| 824 |
fprintview(&thisview, stdout); |
| 825 |
fputc('\n', stdout); |
| 826 |
break; |
| 827 |
case 'V': /* append view to rad file */ |
| 828 |
appendview(NULL, &thisview); |
| 829 |
break; |
| 830 |
case 'q': /* quit the program */ |
| 831 |
return(0); |
| 832 |
default: |
| 833 |
XBell(ourdisplay, 0); |
| 834 |
break; |
| 835 |
} |
| 836 |
return(1); |
| 837 |
} |
| 838 |
|
| 839 |
|
| 840 |
static void |
| 841 |
zoomview( /* zoom in or out around (dx,dy) */ |
| 842 |
int pct, |
| 843 |
int dx, |
| 844 |
int dy |
| 845 |
) |
| 846 |
{ |
| 847 |
double h, v; |
| 848 |
|
| 849 |
if ((pct == 100) | (pct <= 0)) |
| 850 |
return; |
| 851 |
copylastv("zooming"); |
| 852 |
h = (dx+.5)/hres - 0.5; |
| 853 |
v = (dy+.5)/vres - 0.5; |
| 854 |
h *= (1. - 100./pct); |
| 855 |
v *= (1. - 100./pct); |
| 856 |
thisview.vdir[0] += h*thisview.hvec[0] + v*thisview.vvec[0]; |
| 857 |
thisview.vdir[1] += h*thisview.hvec[1] + v*thisview.vvec[1]; |
| 858 |
thisview.vdir[2] += h*thisview.hvec[2] + v*thisview.vvec[2]; |
| 859 |
thisview.horiz = 2.*180./PI * atan( 100./pct * |
| 860 |
tan(PI/180./2.*thisview.horiz) ); |
| 861 |
thisview.vert = 2.*180./PI * atan( 100./pct * |
| 862 |
tan(PI/180./2.*thisview.vert) ); |
| 863 |
setview(&thisview); |
| 864 |
dev_view(&thisview); |
| 865 |
} |
| 866 |
|
| 867 |
|
| 868 |
static void |
| 869 |
gotoview( /* go to specified view number */ |
| 870 |
int vwnum |
| 871 |
) |
| 872 |
{ |
| 873 |
if (vwnum < 0) |
| 874 |
for (vwnum = currentview; vwl[vwnum+1].v != NULL; vwnum++) |
| 875 |
; |
| 876 |
else if (vwnum >= MAXVIEW || vwl[vwnum].v == NULL) |
| 877 |
vwnum = 0; |
| 878 |
copylastv("standard view"); |
| 879 |
dev_view(vwl[currentview=vwnum].v); |
| 880 |
} |
| 881 |
|
| 882 |
|
| 883 |
static void |
| 884 |
appendview( /* append standard view */ |
| 885 |
char *nm, |
| 886 |
VIEW *vp |
| 887 |
) |
| 888 |
{ |
| 889 |
FILE *fp; |
| 890 |
/* check if already in there */ |
| 891 |
if (!memcmp(&thisview, vwl[currentview].v, sizeof(VIEW))) { |
| 892 |
error(COMMAND, "view already in standard list"); |
| 893 |
return; |
| 894 |
} |
| 895 |
/* append to file */ |
| 896 |
if ((fp = fopen(radfile, "a")) == NULL) { |
| 897 |
error(COMMAND, "cannot append rad input file"); |
| 898 |
return; |
| 899 |
} |
| 900 |
fputs("view=", fp); |
| 901 |
if (nm != NULL) { |
| 902 |
fputc(' ', fp); fputs(nm, fp); |
| 903 |
} |
| 904 |
fprintview(vp, fp); fputc('\n', fp); |
| 905 |
fclose(fp); |
| 906 |
/* append to our list */ |
| 907 |
while (vwl[currentview].v != NULL) |
| 908 |
currentview++; |
| 909 |
if (currentview >= MAXVIEW) |
| 910 |
error(INTERNAL, "too many views in appendview"); |
| 911 |
vwl[currentview].v = (VIEW *)bmalloc(sizeof(VIEW)); |
| 912 |
*(vwl[currentview].v) = thisview; |
| 913 |
if (nm != NULL) |
| 914 |
vwl[currentview].nam = savqstr(nm); |
| 915 |
} |
| 916 |
|
| 917 |
|
| 918 |
static void |
| 919 |
copylastv( /* copy last view position */ |
| 920 |
char *cause |
| 921 |
) |
| 922 |
{ |
| 923 |
static char *lastvc; |
| 924 |
|
| 925 |
if (cause == lastvc) |
| 926 |
return; /* only record one view per cause */ |
| 927 |
lastvc = cause; |
| 928 |
lastview = thisview; |
| 929 |
} |
| 930 |
|
| 931 |
|
| 932 |
static void |
| 933 |
fixwindow( /* repair damage to window */ |
| 934 |
XExposeEvent *eexp |
| 935 |
) |
| 936 |
{ |
| 937 |
if ((hres == 0) | (vres == 0)) { /* first exposure */ |
| 938 |
resizewindow((XConfigureEvent *)eexp); |
| 939 |
return; |
| 940 |
} |
| 941 |
if (eexp->count) /* wait for final exposure */ |
| 942 |
return; |
| 943 |
/* rerender everything */ |
| 944 |
render(); |
| 945 |
} |
| 946 |
|
| 947 |
|
| 948 |
static void |
| 949 |
resizewindow( /* resize window */ |
| 950 |
XConfigureEvent *ersz |
| 951 |
) |
| 952 |
{ |
| 953 |
static char resizing[] = "resizing window"; |
| 954 |
double wa, va; |
| 955 |
|
| 956 |
glViewport(0, 0, hres=ersz->width, vres=ersz->height); |
| 957 |
if (hres > maxhres) maxhres = hres; |
| 958 |
if (vres > maxvres) maxvres = vres; |
| 959 |
if (no_render) |
| 960 |
return; |
| 961 |
wa = (vres*pheight)/(hres*pwidth); |
| 962 |
va = viewaspect(&thisview); |
| 963 |
if (va > wa+.05) { |
| 964 |
copylastv(resizing); |
| 965 |
thisview.vert = 2.*180./PI * |
| 966 |
atan( tan(PI/180./2. * thisview.horiz) * wa ); |
| 967 |
} else if (va < wa-.05) { |
| 968 |
copylastv(resizing); |
| 969 |
thisview.horiz = 2.*180./PI * |
| 970 |
atan( tan(PI/180./2. * thisview.vert) / wa ); |
| 971 |
} else |
| 972 |
return; |
| 973 |
setview(&thisview); |
| 974 |
dev_view(&thisview); |
| 975 |
} |
