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gwlarson |
3.1 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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#endif |
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/* |
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* Program to display Radiance scene using OpenGL. |
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*/ |
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#include "radogl.h" |
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#include "view.h" |
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#include "paths.h" |
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#include <sys/types.h> |
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#include <GL/glx.h> |
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#include <ctype.h> |
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#include "glradicon.h" |
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#ifndef MAXVIEW |
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#define MAXVIEW 63 /* maximum number of standard views */ |
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#endif |
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#ifndef MAXSCENE |
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#define MAXSCENE 127 /* maximum number of scene files */ |
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#endif |
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#define ZOOMPCT 9 /* percent to zoom at a time */ |
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#define MOVPCT 7 /* percent distance to move /frame */ |
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#define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1) |
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#define MOVDEG (-5) /* degrees to orbit CW/down /frame */ |
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#define MOVORB(s) ((s)&ShiftMask ? 1 : (s)&ControlMask ? -1 : 0) |
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#define MINWIDTH 480 /* minimum graphics window width */ |
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#define MINHEIGHT 400 /* minimum graphics window height */ |
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#define BORWIDTH 5 /* border width */ |
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#define ourscreen DefaultScreen(ourdisplay) |
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#define ourroot RootWindow(ourdisplay,ourscreen) |
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#define ourmask (StructureNotifyMask|ExposureMask|KeyPressMask|\ |
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ButtonPressMask|ButtonReleaseMask) |
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#define levptr(etype) ((etype *)¤tevent) |
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XEvent currentevent; /* current event */ |
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int mapped = 0; /* window is mapped? */ |
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unsigned long ourblack=0, ourwhite=~0; |
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Display *ourdisplay = NULL; /* our display */ |
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XVisualInfo *ourvinf; /* our visual information */ |
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Window gwind = 0; /* our graphics window */ |
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int hres, vres; /* rendering window dimensions */ |
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int maxhres, maxvres; /* maximum given dimensions */ |
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GLXContext gctx; /* our GLX context */ |
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double pwidth, pheight; /* pixel dimensions (mm) */ |
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int headlocked = 0; /* lock vertical motion */ |
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struct { |
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char *nam; /* view name (NULL if none) */ |
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VIEW *v; /* parameters (NULL term.) */ |
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} vwl[MAXVIEW+1]; /* our list of views */ |
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int currentview = 0; /* current view number */ |
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VIEW thisview = STDVIEW; /* displayed view */ |
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VIEW lastview; /* last recorded view */ |
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char *lastvc = NULL; /* cause of last view change */ |
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char *progname; /* global argv[0] */ |
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char *radfile; /* rad input file */ |
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char *scene[MAXSCENE+1]; /* material and scene file list */ |
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int nscenef = 0; /* number of scene files */ |
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char *octree; /* octree name (NULL if unnec.) */ |
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int rtpd[3]; /* rtrace process descriptors */ |
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int backvis = 1; /* back faces visible? */ |
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int displist; /* our scene display list */ |
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extern char *fgets(), *fgetline(), *atos(), *scan4var(); |
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extern int nowarn; /* turn warnings off? */ |
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extern time_t time(); |
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
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char *viewsel = NULL; |
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long vwintvl = 0; |
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int i; |
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progname = argv[0]; |
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for (i = 1; i < argc && argv[i][0] == '-'; i++) |
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switch (argv[i][1]) { |
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case 'v': |
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viewsel = argv[++i]; |
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break; |
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case 'w': |
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nowarn = !nowarn; |
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break; |
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case 'c': |
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vwintvl = atoi(argv[++i]); |
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break; |
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case 'b': |
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backvis = !backvis; |
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break; |
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default: |
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goto userr; |
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} |
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if (i >= argc) |
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goto userr; |
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/* run rad and get views */ |
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runrad(argc-i, argv+i); |
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/* check view */ |
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if (viewsel != NULL && (currentview = findvw(viewsel)) < 0) { |
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fprintf(stderr, "%s: no such view\n", viewsel); |
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quit(1); |
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} |
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/* open GL */ |
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dev_open(radfile = argv[i]); |
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/* load octree or scene files */ |
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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 */ |
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while (dev_input(vwintvl)) |
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; |
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/* all done */ |
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quit(0); |
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userr: |
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fprintf(stderr, "Usage: %s [-w][-c #secs][-v view] rfile [VAR=value]..\n", |
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argv[0]); |
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quit(1); |
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} |
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quit(code) /* exit gracefully */ |
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int code; |
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{ |
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if (ourdisplay != NULL) |
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dev_close(); |
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if (rtpd[2] > 0) { |
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if (close_process(rtpd) > 0) |
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wputs("bad exit status from rtrace\n"); |
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rtpd[2] = 0; |
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} |
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exit(code); |
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} |
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startrtrace(octname) /* start rtrace on octname */ |
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char *octname; |
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{ |
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static char *av[12] = {"rtrace", "-h", "-fff", "-ld+", |
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"-opL", "-x", "1"}; |
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int ac = 7; |
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if (nowarn) av[ac++] = "-w-"; |
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av[ac++] = octname; |
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av[ac] = NULL; |
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if (open_process(rtpd, av) <= 0) |
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error(SYSTEM, "cannot start rtrace process"); |
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} |
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runrad(ac, av) /* run rad and load variables */ |
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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; |
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while (ac--) { |
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strcpy(cp, *av++); |
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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"); |
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/* replace "-v 0" with "-n -e -s -V" */ |
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strcpy(radcomm+7, "-n -e -s -V"); |
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radcomm[18] = ' '; |
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if ((fp = popen(radcomm, "r")) == NULL) |
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error(SYSTEM, "cannot start rad command"); |
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buf[0] = '\0'; /* read variables alphabetically */ |
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/* get exposure */ |
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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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} |
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/* look for materials */ |
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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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} |
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/* look for octree */ |
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if ((cp = scan4var(buf, sizeof(buf), "OCTREE", fp)) != NULL) |
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octree = savqstr(cp); |
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/* look for scene files */ |
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while ((cp = scan4var(buf, sizeof(buf), "scene", fp)) != NULL) { |
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nscenef += wordstring(scene+nscenef, cp); |
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buf[0] = '\0'; |
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} |
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/* load view names */ |
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while ((cp = scan4var(buf, sizeof(buf), "view", fp)) != NULL) { |
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if (nvn >= MAXVIEW) |
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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 |
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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", |
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progname, nvv, cp); |
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quit(1); |
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} |
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} |
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while (fgets(buf, sizeof(buf), fp) != NULL); |
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if (nvv != nvn) |
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error(INTERNAL, "view miscount in runrad"); |
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pclose(fp); |
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/* open options file */ |
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if ((fp = fopen(optfile, "r")) == NULL) |
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error(SYSTEM, "cannot open options file"); |
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/* get ambient value */ |
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while (fgets(buf, sizeof(buf), fp) != NULL) |
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if (!strncmp(buf, "-av ", 4)) { |
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setcolor(ambval, atof(buf+4), |
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atof(sskip2(buf+4,1)), |
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atof(sskip2(buf+4,2))); |
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break; |
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} |
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fclose(fp); |
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unlink(optfile); /* delete options file */ |
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} |
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int |
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findvw(nm) /* find named view */ |
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register char *nm; |
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{ |
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register int n; |
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if (*nm >= '1' & *nm <= '9' && |
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(n = atoi(nm)-1) <= MAXVIEW && vwl[n].v != NULL) |
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return(n); |
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for (n = 0; vwl[n].v != NULL; n++) |
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if (vwl[n].nam != NULL && !strcmp(nm, vwl[n].nam)) |
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return(n); |
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return(-1); |
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} |
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int |
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varmatch(s, vn) /* match line to variable */ |
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register char *s, *vn; |
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{ |
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register int c; |
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for ( ; *vn && *s == *vn; s++, vn++) |
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; |
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while (isspace(*s)) |
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s++; |
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if (*s == '=') |
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return(*vn); |
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while (!(c = toupper(*s++) - toupper(*vn)) && *vn++) |
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; |
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return(c); |
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} |
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char * |
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scan4var(buf, buflen, vname, fp) /* scan for variable from fp */ |
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char *buf; |
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int buflen; |
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char *vname; |
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FILE *fp; |
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{ |
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int cval; |
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register char *cp; |
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/* search out matching line */ |
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while ((cval = varmatch(buf, vname))) { |
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if (cval > 0) /* gone too far? */ |
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return(NULL); |
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buf[0] = '\0'; /* else get next line */ |
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if (fgetline(buf, buflen, fp) == NULL) |
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return(NULL); |
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} |
312 |
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/* skip variable name and '=' */ |
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for (cp = buf; *cp++ != '='; ) |
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; |
315 |
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while (isspace(*cp)) cp++; |
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return(cp); |
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} |
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320 |
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dev_open(id) /* initialize GLX driver */ |
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char *id; |
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{ |
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static int atlBest[] = {GLX_RGBA, GLX_RED_SIZE,4, |
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GLX_GREEN_SIZE,4, GLX_BLUE_SIZE,4, |
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GLX_DOUBLEBUFFER, GLX_DEPTH_SIZE,15, None}; |
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XSetWindowAttributes ourwinattr; |
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XWMHints ourxwmhints; |
328 |
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XSizeHints oursizhints; |
329 |
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/* open display server */ |
330 |
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ourdisplay = XOpenDisplay(NULL); |
331 |
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if (ourdisplay == NULL) |
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error(USER, "cannot open X-windows; DISPLAY variable set?\n"); |
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/* find a usable visual */ |
334 |
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ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlBest); |
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if (ourvinf == NULL) |
336 |
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error(USER, "no suitable visuals available"); |
337 |
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/* get a context */ |
338 |
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gctx = glXCreateContext(ourdisplay, ourvinf, NULL, GL_TRUE); |
339 |
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/* open window */ |
340 |
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ourwinattr.background_pixel = ourblack; |
341 |
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ourwinattr.border_pixel = ourblack; |
342 |
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ourwinattr.event_mask = ourmask; |
343 |
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/* this is stupid */ |
344 |
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ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot, |
345 |
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ourvinf->visual, AllocNone); |
346 |
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gwind = XCreateWindow(ourdisplay, ourroot, 0, 0, |
347 |
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DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH, |
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DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH, |
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BORWIDTH, ourvinf->depth, InputOutput, ourvinf->visual, |
350 |
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CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &ourwinattr); |
351 |
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if (gwind == 0) |
352 |
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error(SYSTEM, "cannot create window\n"); |
353 |
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XStoreName(ourdisplay, gwind, id); |
354 |
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/* set window manager hints */ |
355 |
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ourxwmhints.flags = InputHint|IconPixmapHint; |
356 |
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ourxwmhints.input = True; |
357 |
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ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay, |
358 |
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gwind, glradicon_bits, glradicon_width, glradicon_height); |
359 |
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XSetWMHints(ourdisplay, gwind, &ourxwmhints); |
360 |
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oursizhints.min_width = MINWIDTH; |
361 |
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oursizhints.min_height = MINHEIGHT; |
362 |
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oursizhints.flags = PMinSize; |
363 |
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XSetNormalHints(ourdisplay, gwind, &oursizhints); |
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/* set GLX context */ |
365 |
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glXMakeCurrent(ourdisplay, gwind, gctx); |
366 |
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glEnable(GL_DEPTH_TEST); |
367 |
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glDepthFunc(GL_LESS); |
368 |
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glShadeModel(GL_SMOOTH); |
369 |
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
370 |
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glLightModelf(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE); |
371 |
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glEnable(GL_LIGHTING); |
372 |
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if (backvis) |
373 |
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glDisable(GL_CULL_FACE); |
374 |
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else { |
375 |
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glFrontFace(GL_CCW); |
376 |
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glCullFace(GL_BACK); |
377 |
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glEnable(GL_CULL_FACE); |
378 |
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} |
379 |
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glDrawBuffer(GL_BACK); |
380 |
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/* figure out sensible view */ |
381 |
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pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) / |
382 |
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|
DisplayWidth(ourdisplay, ourscreen); |
383 |
|
|
pheight = (double)DisplayHeightMM(ourdisplay, ourscreen) / |
384 |
|
|
DisplayHeight(ourdisplay, ourscreen); |
385 |
|
|
/* map the window */ |
386 |
|
|
XMapWindow(ourdisplay, gwind); |
387 |
|
|
rgl_checkerr("initializing GLX"); |
388 |
|
|
} |
389 |
|
|
|
390 |
|
|
|
391 |
|
|
dev_close() /* close our display and free resources */ |
392 |
|
|
{ |
393 |
|
|
glXMakeCurrent(ourdisplay, None, NULL); |
394 |
|
|
glXDestroyContext(ourdisplay, gctx); |
395 |
|
|
XDestroyWindow(ourdisplay, gwind); |
396 |
|
|
gwind = 0; |
397 |
|
|
XCloseDisplay(ourdisplay); |
398 |
|
|
ourdisplay = NULL; |
399 |
|
|
} |
400 |
|
|
|
401 |
|
|
|
402 |
|
|
int |
403 |
|
|
dev_view(nv) /* assign new driver view */ |
404 |
|
|
register VIEW *nv; |
405 |
|
|
{ |
406 |
|
|
int newhres = hres, newvres = vres; |
407 |
|
|
double wa, va; |
408 |
|
|
/* check view legality */ |
409 |
|
|
if (nv->type != VT_PER) { |
410 |
|
|
error(COMMAND, "illegal view type"); |
411 |
|
|
nv->type = VT_PER; |
412 |
|
|
} |
413 |
|
|
if (nv->horiz > 160. | nv->vert > 160.) { |
414 |
|
|
error(COMMAND, "illegal view angle"); |
415 |
|
|
if (nv->horiz > 160.) |
416 |
|
|
nv->horiz = 160.; |
417 |
|
|
if (nv->vert > 160.) |
418 |
|
|
nv->vert = 160.; |
419 |
|
|
} |
420 |
|
|
if (hres != 0 & vres != 0) { |
421 |
|
|
wa = (vres*pheight)/(hres*pwidth); |
422 |
|
|
va = viewaspect(&thisview); |
423 |
|
|
if (va > wa+.05) { |
424 |
|
|
newvres = (pwidth/pheight)*va*newhres + .5; |
425 |
|
|
if (newvres > maxvres) { |
426 |
|
|
newvres = maxvres; |
427 |
|
|
newhres = (pheight/pwidth)/va*newvres + .5; |
428 |
|
|
} |
429 |
|
|
} else if (va < wa-.05) { |
430 |
|
|
newhres = (pheight/pwidth)/va*newvres + .5; |
431 |
|
|
if (newhres > maxhres) { |
432 |
|
|
newhres = maxhres; |
433 |
|
|
newvres = (pwidth/pheight)*va*newhres + .5; |
434 |
|
|
} |
435 |
|
|
} |
436 |
|
|
if (newhres != hres | newvres != vres) { |
437 |
|
|
XResizeWindow(ourdisplay, gwind, newhres, newvres); |
438 |
|
|
do |
439 |
|
|
dev_input(0); /* get resize event */ |
440 |
|
|
while (newhres != hres | newvres != vres); |
441 |
|
|
} |
442 |
|
|
} |
443 |
|
|
copystruct(&thisview, nv); |
444 |
|
|
setglpersp(&thisview); |
445 |
|
|
render(); |
446 |
|
|
return(1); |
447 |
|
|
} |
448 |
|
|
|
449 |
|
|
|
450 |
|
|
int |
451 |
|
|
dev_input(nsecs) /* get next input event */ |
452 |
|
|
int nsecs; |
453 |
|
|
{ |
454 |
|
|
#if 0 |
455 |
|
|
static time_t lasttime = 0; |
456 |
|
|
time_t thistime; |
457 |
|
|
|
458 |
|
|
if (nsecs > 0) { |
459 |
|
|
thistime = time(0); |
460 |
|
|
nsecs -= (long)(thistime - lasttime); |
461 |
|
|
lasttime = thistime; |
462 |
|
|
} |
463 |
|
|
if (nsecs > 0) |
464 |
|
|
alarm(nsecs); |
465 |
|
|
#endif |
466 |
|
|
XNextEvent(ourdisplay, levptr(XEvent)); |
467 |
|
|
switch (levptr(XEvent)->type) { |
468 |
|
|
case ConfigureNotify: |
469 |
|
|
resizewindow(levptr(XConfigureEvent)); |
470 |
|
|
break; |
471 |
|
|
case UnmapNotify: |
472 |
|
|
mapped = 0; |
473 |
|
|
break; |
474 |
|
|
case MapNotify: |
475 |
|
|
mapped = 1; |
476 |
|
|
break; |
477 |
|
|
case Expose: |
478 |
|
|
fixwindow(levptr(XExposeEvent)); |
479 |
|
|
break; |
480 |
|
|
case KeyPress: |
481 |
|
|
return(getkey(levptr(XKeyPressedEvent))); |
482 |
|
|
case ButtonPress: |
483 |
|
|
getmove(levptr(XButtonPressedEvent)); |
484 |
|
|
break; |
485 |
|
|
} |
486 |
|
|
return(1); |
487 |
|
|
} |
488 |
|
|
|
489 |
|
|
|
490 |
|
|
render() /* render our display list and swap buffers */ |
491 |
|
|
{ |
492 |
|
|
if (!mapped) |
493 |
|
|
return; |
494 |
|
|
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); |
495 |
|
|
glCallList(displist); |
496 |
|
|
glXSwapBuffers(ourdisplay, gwind); /* calls glFlush() */ |
497 |
|
|
rgl_checkerr("rendering display list"); |
498 |
|
|
} |
499 |
|
|
|
500 |
|
|
|
501 |
|
|
moveview(dx, dy, mov, orb) /* move our view */ |
502 |
|
|
int dx, dy, mov, orb; |
503 |
|
|
{ |
504 |
|
|
VIEW nv; |
505 |
|
|
FVECT odir, v1, wp; |
506 |
|
|
double d; |
507 |
|
|
register int li; |
508 |
|
|
/* start with old view */ |
509 |
|
|
copystruct(&nv, &thisview); |
510 |
|
|
/* change view direction */ |
511 |
|
|
if ((d = viewray(v1, odir, &thisview, |
512 |
|
|
(dx+.5)/hres, (dy+.5)/vres)) < -FTINY) |
513 |
|
|
return(0); /* outside view */ |
514 |
|
|
if (mov | orb) { |
515 |
|
|
if (!getintersect(wp, v1, odir, d)) |
516 |
|
|
return(0); |
517 |
|
|
VSUM(odir, wp, nv.vp, -1.); |
518 |
|
|
} else |
519 |
|
|
VCOPY(nv.vdir, odir); |
520 |
|
|
if (orb && mov) { /* orbit left/right */ |
521 |
|
|
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov); |
522 |
|
|
VSUM(nv.vp, wp, odir, -1.); |
523 |
|
|
spinvector(nv.vdir, nv.vdir, nv.vup, d); |
524 |
|
|
} else if (orb) { /* orbit up/down */ |
525 |
|
|
fcross(v1, odir, nv.vup); |
526 |
|
|
if (normalize(v1) == 0.) |
527 |
|
|
return(0); |
528 |
|
|
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb); |
529 |
|
|
VSUM(nv.vp, wp, odir, -1.); |
530 |
|
|
spinvector(nv.vdir, nv.vdir, v1, d); |
531 |
|
|
} else if (mov) { /* move forward/backward */ |
532 |
|
|
d = MOVPCT/100. * mov; |
533 |
|
|
VSUM(nv.vp, nv.vp, odir, d); |
534 |
|
|
} |
535 |
|
|
if (!mov ^ !orb && headlocked) { /* restore head height */ |
536 |
|
|
VSUM(v1, thisview.vp, nv.vp, -1.); |
537 |
|
|
d = DOT(v1, thisview.vup); |
538 |
|
|
VSUM(nv.vp, nv.vp, thisview.vup, d); |
539 |
|
|
} |
540 |
|
|
if (setview(&nv) != NULL) |
541 |
|
|
return(0); /* illegal view */ |
542 |
|
|
dev_view(&nv); |
543 |
|
|
return(1); |
544 |
|
|
} |
545 |
|
|
|
546 |
|
|
|
547 |
|
|
getmove(ebut) /* get view change */ |
548 |
|
|
XButtonPressedEvent *ebut; |
549 |
|
|
{ |
550 |
|
|
int movdir = MOVDIR(ebut->button); |
551 |
|
|
int movorb = MOVORB(ebut->state); |
552 |
|
|
int moved = 0; |
553 |
|
|
Window rootw, childw; |
554 |
|
|
int rootx, rooty, wx, wy; |
555 |
|
|
unsigned int statemask; |
556 |
|
|
|
557 |
|
|
copylastv("moving"); |
558 |
|
|
XNoOp(ourdisplay); |
559 |
|
|
|
560 |
|
|
while (!XCheckMaskEvent(ourdisplay, |
561 |
|
|
ButtonReleaseMask, levptr(XEvent))) { |
562 |
|
|
|
563 |
|
|
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
564 |
|
|
&rootx, &rooty, &wx, &wy, &statemask)) |
565 |
|
|
break; /* on another screen */ |
566 |
|
|
|
567 |
|
|
if (!moveview(wx, vres-1-wy, movdir, movorb)) { |
568 |
|
|
sleep(1); |
569 |
|
|
continue; |
570 |
|
|
} else |
571 |
|
|
moved++; |
572 |
|
|
} |
573 |
|
|
if (!moved) { /* do final motion */ |
574 |
|
|
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
575 |
|
|
wx = levptr(XButtonReleasedEvent)->x; |
576 |
|
|
wy = levptr(XButtonReleasedEvent)->y; |
577 |
|
|
moveview(wx, vres-1-wy, movdir, movorb); |
578 |
|
|
} |
579 |
|
|
} |
580 |
|
|
|
581 |
|
|
|
582 |
|
|
getintersect(wp, org, dir, md) /* intersect ray with scene geometry */ |
583 |
|
|
FVECT wp; /* returned world intersection point */ |
584 |
|
|
FVECT org, dir; |
585 |
|
|
double md; |
586 |
|
|
{ |
587 |
|
|
float fbuf[6]; |
588 |
|
|
/* check to see if rtrace is running */ |
589 |
|
|
if (rtpd[2] <= 0) |
590 |
|
|
return(0); |
591 |
|
|
/* assign origin */ |
592 |
|
|
fbuf[0] = org[0]; fbuf[1] = org[1]; fbuf[2] = org[2]; |
593 |
|
|
/* compute clipping distance */ |
594 |
|
|
if (md <= FTINY) md = FHUGE; |
595 |
|
|
fbuf[3] = dir[0]*md; fbuf[4] = dir[1]*md; fbuf[5] = dir[2]*md; |
596 |
|
|
/* trace that ray */ |
597 |
|
|
if (process(rtpd, fbuf, fbuf, 4*sizeof(float), 6*sizeof(float)) != |
598 |
|
|
4*sizeof(float)) |
599 |
|
|
error(INTERNAL, "error getting data back from rtrace process"); |
600 |
|
|
if (fbuf[3] >= .99*FHUGE) |
601 |
|
|
return(0); /* missed local objects */ |
602 |
|
|
wp[0] = fbuf[0]; wp[1] = fbuf[1]; wp[2] = fbuf[2]; |
603 |
|
|
return(1); /* else return world intersection */ |
604 |
|
|
} |
605 |
|
|
|
606 |
|
|
|
607 |
|
|
setglpersp(vp) /* set perspective view in GL */ |
608 |
|
|
register VIEW *vp; |
609 |
|
|
{ |
610 |
|
|
double d, xmin, xmax, ymin, ymax, zmin, zmax; |
611 |
|
|
|
612 |
|
|
zmin = 0.05; |
613 |
|
|
zmax = 5000.; |
614 |
|
|
if (thisview.vfore > FTINY) |
615 |
|
|
zmin = thisview.vfore; |
616 |
|
|
if (thisview.vaft > FTINY) |
617 |
|
|
zmax = thisview.vaft; |
618 |
|
|
xmax = zmin * tan(PI/180./2. * thisview.horiz); |
619 |
|
|
xmin = -xmax; |
620 |
|
|
d = thisview.hoff * (xmax - xmin); |
621 |
|
|
xmin += d; xmax += d; |
622 |
|
|
ymax = zmin * tan(PI/180./2. * thisview.vert); |
623 |
|
|
ymin = -ymax; |
624 |
|
|
d = thisview.voff * (ymax - ymin); |
625 |
|
|
ymin += d; ymax += d; |
626 |
|
|
/* set view matrix */ |
627 |
|
|
glMatrixMode(GL_PROJECTION); |
628 |
|
|
glLoadIdentity(); |
629 |
|
|
glFrustum(xmin, xmax, ymin, ymax, zmin, zmax); |
630 |
|
|
gluLookAt(thisview.vp[0], thisview.vp[1], thisview.vp[2], |
631 |
|
|
thisview.vp[0] + thisview.vdir[0], |
632 |
|
|
thisview.vp[1] + thisview.vdir[1], |
633 |
|
|
thisview.vp[2] + thisview.vdir[2], |
634 |
|
|
thisview.vup[0], thisview.vup[1], thisview.vup[2]); |
635 |
|
|
rgl_checkerr("setting perspective view"); |
636 |
|
|
} |
637 |
|
|
|
638 |
|
|
|
639 |
|
|
int |
640 |
|
|
getkey(ekey) /* get input key */ |
641 |
|
|
register XKeyPressedEvent *ekey; |
642 |
|
|
{ |
643 |
|
|
int n; |
644 |
|
|
char buf[8]; |
645 |
|
|
|
646 |
|
|
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
647 |
|
|
if (n != 1) |
648 |
|
|
return(1); |
649 |
|
|
switch (buf[0]) { |
650 |
|
|
case 'h': /* turn on height motion lock */ |
651 |
|
|
headlocked = 1; |
652 |
|
|
break; |
653 |
|
|
case 'H': /* turn off height motion lock */ |
654 |
|
|
headlocked = 0; |
655 |
|
|
break; |
656 |
|
|
case 'l': /* retrieve last (premouse) view */ |
657 |
|
|
if (lastvc != NULL) { |
658 |
|
|
VIEW vtmp; |
659 |
|
|
copystruct(&vtmp, &thisview); |
660 |
|
|
dev_view(&lastview); |
661 |
|
|
copystruct(&lastview, &vtmp); |
662 |
|
|
} else |
663 |
|
|
XBell(ourdisplay, 0); |
664 |
|
|
break; |
665 |
|
|
case 'n': /* move to next standard view */ |
666 |
|
|
gotoview(currentview+1); |
667 |
|
|
break; |
668 |
|
|
case 'p': /* move to last standard view */ |
669 |
|
|
gotoview(currentview-1); |
670 |
|
|
break; |
671 |
|
|
case '+': /* zoom in */ |
672 |
|
|
zoomview(100+ZOOMPCT, ekey->x, vres-1-ekey->y); |
673 |
|
|
break; |
674 |
|
|
case '-': /* zoom out */ |
675 |
|
|
zoomview(100-ZOOMPCT, ekey->x, vres-1-ekey->y); |
676 |
|
|
break; |
677 |
|
|
case 'v': /* spit current view to stdout */ |
678 |
|
|
fputs(VIEWSTR, stdout); |
679 |
|
|
fprintview(&thisview, stdout); |
680 |
|
|
fputc('\n', stdout); |
681 |
|
|
break; |
682 |
|
|
case 'V': /* append view to rad file */ |
683 |
|
|
appendview(NULL, &thisview); |
684 |
|
|
break; |
685 |
|
|
case 'q': /* quit the program */ |
686 |
|
|
return(0); |
687 |
|
|
default: |
688 |
|
|
XBell(ourdisplay, 0); |
689 |
|
|
break; |
690 |
|
|
} |
691 |
|
|
return(1); |
692 |
|
|
} |
693 |
|
|
|
694 |
|
|
|
695 |
|
|
zoomview(pct, dx, dy) /* zoom in or out around (dx,dy) */ |
696 |
|
|
int pct; |
697 |
|
|
int dx, dy; |
698 |
|
|
{ |
699 |
|
|
double h, v; |
700 |
|
|
FVECT direc; |
701 |
|
|
|
702 |
|
|
if (pct == 100 | pct <= 0) |
703 |
|
|
return; |
704 |
|
|
copylastv("zooming"); |
705 |
|
|
h = (dx+.5)/hres - 0.5; |
706 |
|
|
v = (dy+.5)/vres - 0.5; |
707 |
|
|
h *= (1. - 100./pct); |
708 |
|
|
v *= (1. - 100./pct); |
709 |
|
|
thisview.vdir[0] += h*thisview.hvec[0] + v*thisview.vvec[0]; |
710 |
|
|
thisview.vdir[1] += h*thisview.hvec[1] + v*thisview.vvec[1]; |
711 |
|
|
thisview.vdir[2] += h*thisview.hvec[2] + v*thisview.vvec[2]; |
712 |
|
|
thisview.horiz = 2.*180./PI * atan( 100./pct * |
713 |
|
|
tan(PI/180./2.*thisview.horiz) ); |
714 |
|
|
thisview.vert = 2.*180./PI * atan( 100./pct * |
715 |
|
|
tan(PI/180./2.*thisview.vert) ); |
716 |
|
|
setview(&thisview); |
717 |
|
|
dev_view(&thisview); |
718 |
|
|
} |
719 |
|
|
|
720 |
|
|
|
721 |
|
|
gotoview(vwnum) /* go to specified view number */ |
722 |
|
|
int vwnum; |
723 |
|
|
{ |
724 |
|
|
if (vwnum < 0) |
725 |
|
|
for (vwnum = currentview; vwl[vwnum+1].v != NULL; vwnum++) |
726 |
|
|
; |
727 |
|
|
else if (vwnum >= MAXVIEW || vwl[vwnum].v == NULL) |
728 |
|
|
vwnum = 0; |
729 |
|
|
if (vwnum == currentview) |
730 |
|
|
return; |
731 |
|
|
dev_view(vwl[currentview=vwnum].v); |
732 |
|
|
} |
733 |
|
|
|
734 |
|
|
|
735 |
|
|
appendview(nm, vp) /* append standard view */ |
736 |
|
|
char *nm; |
737 |
|
|
VIEW *vp; |
738 |
|
|
{ |
739 |
|
|
FILE *fp; |
740 |
|
|
/* check if already in there */ |
741 |
|
|
if (!bcmp(&thisview, vwl[currentview].v, sizeof(VIEW))) { |
742 |
|
|
error(COMMAND, "view already in standard list"); |
743 |
|
|
return; |
744 |
|
|
} |
745 |
|
|
/* append to file */ |
746 |
|
|
if ((fp = fopen(radfile, "a")) == NULL) { |
747 |
|
|
error(COMMAND, "cannot append rad input file"); |
748 |
|
|
return; |
749 |
|
|
} |
750 |
|
|
fputs("view=", fp); |
751 |
|
|
if (nm != NULL) { |
752 |
|
|
fputc(' ', fp); fputs(nm, fp); |
753 |
|
|
} |
754 |
|
|
fprintview(vp, fp); fputc('\n', fp); |
755 |
|
|
fclose(fp); |
756 |
|
|
/* append to our list */ |
757 |
|
|
while (vwl[currentview].v != NULL) |
758 |
|
|
currentview++; |
759 |
|
|
if (currentview >= MAXVIEW) |
760 |
|
|
error(INTERNAL, "too many views in appendview"); |
761 |
|
|
vwl[currentview].v = (VIEW *)bmalloc(sizeof(VIEW)); |
762 |
|
|
copystruct(vwl[currentview].v, &thisview); |
763 |
|
|
if (nm != NULL) |
764 |
|
|
vwl[currentview].nam = savqstr(nm); |
765 |
|
|
} |
766 |
|
|
|
767 |
|
|
|
768 |
|
|
copylastv(cause) /* copy last view position */ |
769 |
|
|
char *cause; |
770 |
|
|
{ |
771 |
|
|
if (cause == lastvc) |
772 |
|
|
return; /* only record one view per cause */ |
773 |
|
|
lastvc = cause; |
774 |
|
|
copystruct(&lastview, &thisview); |
775 |
|
|
} |
776 |
|
|
|
777 |
|
|
|
778 |
|
|
fixwindow(eexp) /* repair damage to window */ |
779 |
|
|
register XExposeEvent *eexp; |
780 |
|
|
{ |
781 |
|
|
if (hres == 0 | vres == 0) { /* first exposure */ |
782 |
|
|
resizewindow((XConfigureEvent *)eexp); |
783 |
|
|
return; |
784 |
|
|
} |
785 |
|
|
if (eexp->count) /* wait for final exposure */ |
786 |
|
|
return; |
787 |
|
|
/* rerender everything */ |
788 |
|
|
render(); |
789 |
|
|
} |
790 |
|
|
|
791 |
|
|
|
792 |
|
|
resizewindow(ersz) /* resize window */ |
793 |
|
|
register XConfigureEvent *ersz; |
794 |
|
|
{ |
795 |
|
|
static char resizing[] = "resizing window"; |
796 |
|
|
double wa, va; |
797 |
|
|
|
798 |
|
|
glViewport(0, 0, hres=ersz->width, vres=ersz->height); |
799 |
|
|
if (hres > maxhres) maxhres = hres; |
800 |
|
|
if (vres > maxvres) maxvres = vres; |
801 |
|
|
wa = (vres*pheight)/(hres*pwidth); |
802 |
|
|
va = viewaspect(&thisview); |
803 |
|
|
if (va > wa+.05) { |
804 |
|
|
copylastv(resizing); |
805 |
|
|
thisview.vert = 2.*180./PI * |
806 |
|
|
atan( tan(PI/180./2. * thisview.horiz) * wa ); |
807 |
|
|
} else if (va < wa-.05) { |
808 |
|
|
copylastv(resizing); |
809 |
|
|
thisview.horiz = 2.*180./PI * |
810 |
|
|
atan( tan(PI/180./2. * thisview.vert) / wa ); |
811 |
|
|
} else |
812 |
|
|
return; |
813 |
|
|
setview(&thisview); |
814 |
|
|
dev_view(&thisview); |
815 |
|
|
} |