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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 |
| 278 |
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varmatch(s, vn) /* match line to variable */ |
| 279 |
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register char *s, *vn; |
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{ |
| 281 |
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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++; |
| 287 |
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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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; |
| 291 |
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return(c); |
| 292 |
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} |
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char * |
| 296 |
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scan4var(buf, buflen, vname, fp) /* scan for variable from fp */ |
| 297 |
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char *buf; |
| 298 |
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int buflen; |
| 299 |
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char *vname; |
| 300 |
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FILE *fp; |
| 301 |
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{ |
| 302 |
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int cval; |
| 303 |
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register char *cp; |
| 304 |
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/* search out matching line */ |
| 305 |
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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); |
| 308 |
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buf[0] = '\0'; /* else get next line */ |
| 309 |
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if (fgetline(buf, buflen, fp) == NULL) |
| 310 |
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return(NULL); |
| 311 |
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} |
| 312 |
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/* skip variable name and '=' */ |
| 313 |
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for (cp = buf; *cp++ != '='; ) |
| 314 |
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; |
| 315 |
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while (isspace(*cp)) cp++; |
| 316 |
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return(cp); |
| 317 |
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} |
| 318 |
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| 319 |
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| 320 |
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dev_open(id) /* initialize GLX driver */ |
| 321 |
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char *id; |
| 322 |
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{ |
| 323 |
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static int atlBest[] = {GLX_RGBA, GLX_RED_SIZE,4, |
| 324 |
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GLX_GREEN_SIZE,4, GLX_BLUE_SIZE,4, |
| 325 |
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GLX_DOUBLEBUFFER, GLX_DEPTH_SIZE,15, None}; |
| 326 |
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XSetWindowAttributes ourwinattr; |
| 327 |
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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) |
| 332 |
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error(USER, "cannot open X-windows; DISPLAY variable set?\n"); |
| 333 |
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/* find a usable visual */ |
| 334 |
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ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlBest); |
| 335 |
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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, |
| 348 |
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DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH, |
| 349 |
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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); |
| 364 |
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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 |
|
|
glDepthFunc(GL_LESS); |
| 368 |
|
|
glShadeModel(GL_SMOOTH); |
| 369 |
|
|
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
| 370 |
|
|
glLightModelf(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE); |
| 371 |
|
|
glEnable(GL_LIGHTING); |
| 372 |
|
|
if (backvis) |
| 373 |
|
|
glDisable(GL_CULL_FACE); |
| 374 |
|
|
else { |
| 375 |
|
|
glFrontFace(GL_CCW); |
| 376 |
|
|
glCullFace(GL_BACK); |
| 377 |
|
|
glEnable(GL_CULL_FACE); |
| 378 |
|
|
} |
| 379 |
|
|
glDrawBuffer(GL_BACK); |
| 380 |
|
|
/* figure out sensible view */ |
| 381 |
|
|
pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) / |
| 382 |
|
|
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 |
|
|
} |
