1 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
2 |
|
3 |
#ifndef lint |
4 |
static char SCCSid[] = "$SunId$ SGI"; |
5 |
#endif |
6 |
|
7 |
/* |
8 |
* Program to display Radiance scene using OpenGL. |
9 |
*/ |
10 |
|
11 |
#include "radogl.h" |
12 |
#include "view.h" |
13 |
#include "paths.h" |
14 |
#include <sys/types.h> |
15 |
#include <GL/glx.h> |
16 |
#include <ctype.h> |
17 |
#include "glradicon.h" |
18 |
|
19 |
#ifndef MAXVIEW |
20 |
#define MAXVIEW 63 /* maximum number of standard views */ |
21 |
#endif |
22 |
#ifndef MAXSCENE |
23 |
#define MAXSCENE 127 /* maximum number of scene files */ |
24 |
#endif |
25 |
|
26 |
#define ZOOMPCT 9 /* percent to zoom at a time */ |
27 |
|
28 |
#define MOVPCT 7 /* percent distance to move /frame */ |
29 |
#define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1) |
30 |
#define MOVDEG (-5) /* degrees to orbit CW/down /frame */ |
31 |
#define MOVORB(s) ((s)&ShiftMask ? 1 : (s)&ControlMask ? -1 : 0) |
32 |
|
33 |
#define MINWIDTH 480 /* minimum graphics window width */ |
34 |
#define MINHEIGHT 400 /* minimum graphics window height */ |
35 |
|
36 |
#define BORWIDTH 5 /* border width */ |
37 |
|
38 |
#define ourscreen DefaultScreen(ourdisplay) |
39 |
#define ourroot RootWindow(ourdisplay,ourscreen) |
40 |
#define ourmask (StructureNotifyMask|ExposureMask|KeyPressMask|\ |
41 |
ButtonPressMask|ButtonReleaseMask) |
42 |
|
43 |
#define levptr(etype) ((etype *)¤tevent) |
44 |
|
45 |
XEvent currentevent; /* current event */ |
46 |
|
47 |
int mapped = 0; /* window is mapped? */ |
48 |
unsigned long ourblack=0, ourwhite=~0; |
49 |
|
50 |
Display *ourdisplay = NULL; /* our display */ |
51 |
XVisualInfo *ourvinf; /* our visual information */ |
52 |
Window gwind = 0; /* our graphics window */ |
53 |
int hres, vres; /* rendering window dimensions */ |
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int maxhres, maxvres; /* maximum given dimensions */ |
55 |
GLXContext gctx; /* our GLX context */ |
56 |
|
57 |
double pwidth, pheight; /* pixel dimensions (mm) */ |
58 |
|
59 |
int headlocked = 0; /* lock vertical motion */ |
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|
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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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|
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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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|
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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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|
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int rtpd[3]; /* rtrace process descriptors */ |
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|
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int backvis = 1; /* back faces visible? */ |
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|
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int displist; /* our scene display list */ |
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|
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int in_dev_view = 0; /* currently in dev_view() */ |
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|
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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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|
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|
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main(argc, argv) |
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int argc; |
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char *argv[]; |
92 |
{ |
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char *viewsel = NULL; |
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long vwintvl = 0; |
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int i; |
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|
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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; |
103 |
case 'w': |
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nowarn = !nowarn; |
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break; |
106 |
case 'c': |
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vwintvl = atoi(argv[++i]); |
108 |
break; |
109 |
case 'b': |
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backvis = !backvis; |
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break; |
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default: |
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goto userr; |
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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) |
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if (viewsel[0] == '-') { |
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char *ve = viewsel; |
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if (!sscanview(&thisview, viewsel) || |
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(ve = setview(&thisview)) != NULL) { |
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fprintf(stderr, "%s: bad view: %s\n", |
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progname, ve); |
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quit(1); |
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} |
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currentview = -1; |
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} else if ((currentview = findvw(viewsel)) < 0) { |
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fprintf(stderr, "%s: no such view: %s\n", |
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progname, 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(currentview < 0 ? &thisview : 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][-b][-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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|
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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(); |
162 |
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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|
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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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|
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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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|
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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); |
217 |
if (*cp == '-' | *cp == '+') |
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expval = pow(2., expval); |
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expval *= 0.5; /* compensate for local shading */ |
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} |
221 |
/* look for materials */ |
222 |
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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} |
226 |
/* look for octree */ |
227 |
if ((cp = scan4var(buf, sizeof(buf), "OCTREE", fp)) != NULL) |
228 |
octree = savqstr(cp); |
229 |
/* look for scene files */ |
230 |
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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} |
234 |
/* load view names */ |
235 |
while ((cp = scan4var(buf, sizeof(buf), "view", fp)) != NULL) { |
236 |
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 |
244 |
if (isview(buf)) { |
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vwl[nvv].v = (VIEW *)bmalloc(sizeof(VIEW)); |
246 |
copystruct(vwl[nvv].v, &stdview); |
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sscanview(vwl[nvv].v, buf); |
248 |
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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} |
254 |
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); |
258 |
/* open options file */ |
259 |
if ((fp = fopen(optfile, "r")) == NULL) |
260 |
error(SYSTEM, "cannot open options file"); |
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/* get ambient value */ |
262 |
while (fgets(buf, sizeof(buf), fp) != NULL) |
263 |
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; |
268 |
} |
269 |
fclose(fp); |
270 |
unlink(optfile); /* delete options file */ |
271 |
} |
272 |
|
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|
274 |
int |
275 |
findvw(nm) /* find named view */ |
276 |
register char *nm; |
277 |
{ |
278 |
register int n; |
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|
280 |
if (*nm >= '1' & *nm <= '9' && |
281 |
(n = atoi(nm)-1) <= MAXVIEW && vwl[n].v != NULL) |
282 |
return(n); |
283 |
for (n = 0; vwl[n].v != NULL; n++) |
284 |
if (vwl[n].nam != NULL && !strcmp(nm, vwl[n].nam)) |
285 |
return(n); |
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return(-1); |
287 |
} |
288 |
|
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|
290 |
int |
291 |
varmatch(s, vn) /* match line to variable */ |
292 |
register char *s, *vn; |
293 |
{ |
294 |
register int c; |
295 |
|
296 |
for ( ; *vn && *s == *vn; s++, vn++) |
297 |
; |
298 |
while (isspace(*s)) |
299 |
s++; |
300 |
if (*s == '=') |
301 |
return(*vn); |
302 |
while (!(c = toupper(*s++) - toupper(*vn)) && *vn++) |
303 |
; |
304 |
return(c); |
305 |
} |
306 |
|
307 |
|
308 |
char * |
309 |
scan4var(buf, buflen, vname, fp) /* scan for variable from fp */ |
310 |
char *buf; |
311 |
int buflen; |
312 |
char *vname; |
313 |
FILE *fp; |
314 |
{ |
315 |
int cval; |
316 |
register char *cp; |
317 |
/* search out matching line */ |
318 |
while ((cval = varmatch(buf, vname))) { |
319 |
if (cval > 0) /* gone too far? */ |
320 |
return(NULL); |
321 |
buf[0] = '\0'; /* else get next line */ |
322 |
if (fgetline(buf, buflen, fp) == NULL) |
323 |
return(NULL); |
324 |
} |
325 |
/* skip variable name and '=' */ |
326 |
for (cp = buf; *cp++ != '='; ) |
327 |
; |
328 |
while (isspace(*cp)) cp++; |
329 |
return(cp); |
330 |
} |
331 |
|
332 |
|
333 |
dev_open(id) /* initialize GLX driver */ |
334 |
char *id; |
335 |
{ |
336 |
static int atlBest[] = {GLX_RGBA, GLX_RED_SIZE,4, |
337 |
GLX_GREEN_SIZE,4, GLX_BLUE_SIZE,4, |
338 |
GLX_DOUBLEBUFFER, GLX_DEPTH_SIZE,15, None}; |
339 |
XSetWindowAttributes ourwinattr; |
340 |
XWMHints ourxwmhints; |
341 |
XSizeHints oursizhints; |
342 |
/* open display server */ |
343 |
ourdisplay = XOpenDisplay(NULL); |
344 |
if (ourdisplay == NULL) |
345 |
error(USER, "cannot open X-windows; DISPLAY variable set?\n"); |
346 |
/* find a usable visual */ |
347 |
ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlBest); |
348 |
if (ourvinf == NULL) |
349 |
error(USER, "no suitable visuals available"); |
350 |
/* get a context */ |
351 |
gctx = glXCreateContext(ourdisplay, ourvinf, NULL, GL_TRUE); |
352 |
/* open window */ |
353 |
ourwinattr.background_pixel = ourblack; |
354 |
ourwinattr.border_pixel = ourblack; |
355 |
ourwinattr.event_mask = ourmask; |
356 |
/* this is stupid */ |
357 |
ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot, |
358 |
ourvinf->visual, AllocNone); |
359 |
gwind = XCreateWindow(ourdisplay, ourroot, 0, 0, |
360 |
DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH, |
361 |
DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH, |
362 |
BORWIDTH, ourvinf->depth, InputOutput, ourvinf->visual, |
363 |
CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &ourwinattr); |
364 |
if (gwind == 0) |
365 |
error(SYSTEM, "cannot create window\n"); |
366 |
XStoreName(ourdisplay, gwind, id); |
367 |
/* set window manager hints */ |
368 |
ourxwmhints.flags = InputHint|IconPixmapHint; |
369 |
ourxwmhints.input = True; |
370 |
ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay, |
371 |
gwind, glradicon_bits, glradicon_width, glradicon_height); |
372 |
XSetWMHints(ourdisplay, gwind, &ourxwmhints); |
373 |
oursizhints.min_width = MINWIDTH; |
374 |
oursizhints.min_height = MINHEIGHT; |
375 |
oursizhints.flags = PMinSize; |
376 |
XSetNormalHints(ourdisplay, gwind, &oursizhints); |
377 |
/* set GLX context */ |
378 |
glXMakeCurrent(ourdisplay, gwind, gctx); |
379 |
glEnable(GL_DEPTH_TEST); |
380 |
glDepthFunc(GL_LESS); |
381 |
glShadeModel(GL_SMOOTH); |
382 |
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
383 |
glLightModelf(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE); |
384 |
glEnable(GL_LIGHTING); |
385 |
if (backvis) |
386 |
glDisable(GL_CULL_FACE); |
387 |
else { |
388 |
glFrontFace(GL_CCW); |
389 |
glCullFace(GL_BACK); |
390 |
glEnable(GL_CULL_FACE); |
391 |
} |
392 |
glDrawBuffer(GL_BACK); |
393 |
/* figure out sensible view */ |
394 |
pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) / |
395 |
DisplayWidth(ourdisplay, ourscreen); |
396 |
pheight = (double)DisplayHeightMM(ourdisplay, ourscreen) / |
397 |
DisplayHeight(ourdisplay, ourscreen); |
398 |
/* map the window */ |
399 |
XMapWindow(ourdisplay, gwind); |
400 |
do |
401 |
dev_input(0); /* get resize event */ |
402 |
while (hres == 0 & vres == 0); |
403 |
rgl_checkerr("initializing GLX"); |
404 |
} |
405 |
|
406 |
|
407 |
dev_close() /* close our display and free resources */ |
408 |
{ |
409 |
glXMakeCurrent(ourdisplay, None, NULL); |
410 |
glXDestroyContext(ourdisplay, gctx); |
411 |
XDestroyWindow(ourdisplay, gwind); |
412 |
gwind = 0; |
413 |
XCloseDisplay(ourdisplay); |
414 |
ourdisplay = NULL; |
415 |
} |
416 |
|
417 |
|
418 |
int |
419 |
dev_view(nv) /* assign new driver view */ |
420 |
register VIEW *nv; |
421 |
{ |
422 |
int newhres = hres, newvres = vres; |
423 |
double wa, va; |
424 |
/* check view legality */ |
425 |
if (nv->type != VT_PER) { |
426 |
error(COMMAND, "illegal view type"); |
427 |
nv->type = VT_PER; |
428 |
} |
429 |
if (nv->horiz > 160. | nv->vert > 160.) { |
430 |
error(COMMAND, "illegal view angle"); |
431 |
if (nv->horiz > 160.) |
432 |
nv->horiz = 160.; |
433 |
if (nv->vert > 160.) |
434 |
nv->vert = 160.; |
435 |
} |
436 |
if (hres != 0 & vres != 0) { |
437 |
wa = (vres*pheight)/(hres*pwidth); |
438 |
va = viewaspect(nv); |
439 |
if (va > wa+.05) { |
440 |
newvres = (pwidth/pheight)*va*newhres + .5; |
441 |
if (newvres > maxvres) { |
442 |
newvres = maxvres; |
443 |
newhres = (pheight/pwidth)/va*newvres + .5; |
444 |
} |
445 |
} else if (va < wa-.05) { |
446 |
newhres = (pheight/pwidth)/va*newvres + .5; |
447 |
if (newhres > maxhres) { |
448 |
newhres = maxhres; |
449 |
newvres = (pwidth/pheight)*va*newhres + .5; |
450 |
} |
451 |
} |
452 |
if (newhres != hres | newvres != vres) { |
453 |
in_dev_view++; |
454 |
XResizeWindow(ourdisplay, gwind, newhres, newvres); |
455 |
do |
456 |
dev_input(0); /* get resize event */ |
457 |
while (newhres != hres | newvres != vres); |
458 |
in_dev_view--; |
459 |
} |
460 |
} |
461 |
copystruct(&thisview, nv); |
462 |
setglpersp(&thisview); |
463 |
render(); |
464 |
return(1); |
465 |
} |
466 |
|
467 |
|
468 |
int |
469 |
dev_input(nsecs) /* get next input event */ |
470 |
int nsecs; |
471 |
{ |
472 |
#if 0 |
473 |
static time_t lasttime = 0; |
474 |
time_t thistime; |
475 |
|
476 |
if (nsecs > 0) { |
477 |
thistime = time(0); |
478 |
nsecs -= (long)(thistime - lasttime); |
479 |
lasttime = thistime; |
480 |
} |
481 |
if (nsecs > 0) |
482 |
alarm(nsecs); |
483 |
#endif |
484 |
XNextEvent(ourdisplay, levptr(XEvent)); |
485 |
switch (levptr(XEvent)->type) { |
486 |
case ConfigureNotify: |
487 |
resizewindow(levptr(XConfigureEvent)); |
488 |
break; |
489 |
case UnmapNotify: |
490 |
mapped = 0; |
491 |
break; |
492 |
case MapNotify: |
493 |
mapped = 1; |
494 |
break; |
495 |
case Expose: |
496 |
fixwindow(levptr(XExposeEvent)); |
497 |
break; |
498 |
case KeyPress: |
499 |
return(getkey(levptr(XKeyPressedEvent))); |
500 |
case ButtonPress: |
501 |
getmove(levptr(XButtonPressedEvent)); |
502 |
break; |
503 |
} |
504 |
return(1); |
505 |
} |
506 |
|
507 |
|
508 |
render() /* render our display list and swap buffers */ |
509 |
{ |
510 |
if (!mapped) |
511 |
return; |
512 |
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); |
513 |
glCallList(displist); |
514 |
glXSwapBuffers(ourdisplay, gwind); /* calls glFlush() */ |
515 |
rgl_checkerr("rendering display list"); |
516 |
} |
517 |
|
518 |
|
519 |
moveview(dx, dy, mov, orb) /* move our view */ |
520 |
int dx, dy, mov, orb; |
521 |
{ |
522 |
VIEW nv; |
523 |
FVECT odir, v1, wp; |
524 |
double d; |
525 |
register int li; |
526 |
/* start with old view */ |
527 |
copystruct(&nv, &thisview); |
528 |
/* change view direction */ |
529 |
if ((d = viewray(v1, odir, &thisview, |
530 |
(dx+.5)/hres, (dy+.5)/vres)) < -FTINY) |
531 |
return(0); /* outside view */ |
532 |
if (mov | orb) { |
533 |
if (!getintersect(wp, v1, odir, d)) |
534 |
return(0); |
535 |
VSUM(odir, wp, nv.vp, -1.); |
536 |
} else |
537 |
VCOPY(nv.vdir, odir); |
538 |
if (orb && mov) { /* orbit left/right */ |
539 |
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov); |
540 |
VSUM(nv.vp, wp, odir, -1.); |
541 |
spinvector(nv.vdir, nv.vdir, nv.vup, d); |
542 |
} else if (orb) { /* orbit up/down */ |
543 |
fcross(v1, odir, nv.vup); |
544 |
if (normalize(v1) == 0.) |
545 |
return(0); |
546 |
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb); |
547 |
VSUM(nv.vp, wp, odir, -1.); |
548 |
spinvector(nv.vdir, nv.vdir, v1, d); |
549 |
} else if (mov) { /* move forward/backward */ |
550 |
d = MOVPCT/100. * mov; |
551 |
VSUM(nv.vp, nv.vp, odir, d); |
552 |
} |
553 |
if (!mov ^ !orb && headlocked) { /* restore head height */ |
554 |
VSUM(v1, thisview.vp, nv.vp, -1.); |
555 |
d = DOT(v1, thisview.vup); |
556 |
VSUM(nv.vp, nv.vp, thisview.vup, d); |
557 |
} |
558 |
if (setview(&nv) != NULL) |
559 |
return(0); /* illegal view */ |
560 |
dev_view(&nv); |
561 |
return(1); |
562 |
} |
563 |
|
564 |
|
565 |
getmove(ebut) /* get view change */ |
566 |
XButtonPressedEvent *ebut; |
567 |
{ |
568 |
int movdir = MOVDIR(ebut->button); |
569 |
int movorb = MOVORB(ebut->state); |
570 |
int moved = 0; |
571 |
Window rootw, childw; |
572 |
int rootx, rooty, wx, wy; |
573 |
unsigned int statemask; |
574 |
|
575 |
copylastv( movorb ? (movdir ? "left/right" : "up/down") : |
576 |
(movdir ? "fore/back" : "rotate") ); |
577 |
XNoOp(ourdisplay); |
578 |
|
579 |
while (!XCheckMaskEvent(ourdisplay, |
580 |
ButtonReleaseMask, levptr(XEvent))) { |
581 |
|
582 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
583 |
&rootx, &rooty, &wx, &wy, &statemask)) |
584 |
break; /* on another screen */ |
585 |
|
586 |
if (!moveview(wx, vres-1-wy, movdir, movorb)) { |
587 |
sleep(1); |
588 |
continue; |
589 |
} else |
590 |
moved++; |
591 |
} |
592 |
if (!moved) { /* do final motion */ |
593 |
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
594 |
wx = levptr(XButtonReleasedEvent)->x; |
595 |
wy = levptr(XButtonReleasedEvent)->y; |
596 |
moveview(wx, vres-1-wy, movdir, movorb); |
597 |
} |
598 |
} |
599 |
|
600 |
|
601 |
getintersect(wp, org, dir, md) /* intersect ray with scene geometry */ |
602 |
FVECT wp; /* returned world intersection point */ |
603 |
FVECT org, dir; |
604 |
double md; |
605 |
{ |
606 |
float fbuf[6]; |
607 |
/* check to see if rtrace is running */ |
608 |
if (rtpd[2] <= 0) |
609 |
return(0); |
610 |
/* assign origin */ |
611 |
fbuf[0] = org[0]; fbuf[1] = org[1]; fbuf[2] = org[2]; |
612 |
/* compute clipping distance */ |
613 |
if (md <= FTINY) md = FHUGE; |
614 |
fbuf[3] = dir[0]*md; fbuf[4] = dir[1]*md; fbuf[5] = dir[2]*md; |
615 |
/* trace that ray */ |
616 |
if (process(rtpd, fbuf, fbuf, 4*sizeof(float), 6*sizeof(float)) != |
617 |
4*sizeof(float)) |
618 |
error(INTERNAL, "error getting data back from rtrace process"); |
619 |
if (fbuf[3] >= .99*FHUGE) |
620 |
return(0); /* missed local objects */ |
621 |
wp[0] = fbuf[0]; wp[1] = fbuf[1]; wp[2] = fbuf[2]; |
622 |
return(1); /* else return world intersection */ |
623 |
} |
624 |
|
625 |
|
626 |
setglpersp(vp) /* set perspective view in GL */ |
627 |
register VIEW *vp; |
628 |
{ |
629 |
double d, xmin, xmax, ymin, ymax, zmin, zmax; |
630 |
|
631 |
zmin = 0.1; |
632 |
zmax = 1000.; |
633 |
if (thisview.vfore > FTINY) |
634 |
zmin = thisview.vfore; |
635 |
if (thisview.vaft > FTINY) |
636 |
zmax = thisview.vaft; |
637 |
xmax = zmin * tan(PI/180./2. * thisview.horiz); |
638 |
xmin = -xmax; |
639 |
d = thisview.hoff * (xmax - xmin); |
640 |
xmin += d; xmax += d; |
641 |
ymax = zmin * tan(PI/180./2. * thisview.vert); |
642 |
ymin = -ymax; |
643 |
d = thisview.voff * (ymax - ymin); |
644 |
ymin += d; ymax += d; |
645 |
/* set view matrix */ |
646 |
glMatrixMode(GL_PROJECTION); |
647 |
glLoadIdentity(); |
648 |
glFrustum(xmin, xmax, ymin, ymax, zmin, zmax); |
649 |
gluLookAt(thisview.vp[0], thisview.vp[1], thisview.vp[2], |
650 |
thisview.vp[0] + thisview.vdir[0], |
651 |
thisview.vp[1] + thisview.vdir[1], |
652 |
thisview.vp[2] + thisview.vdir[2], |
653 |
thisview.vup[0], thisview.vup[1], thisview.vup[2]); |
654 |
rgl_checkerr("setting perspective view"); |
655 |
} |
656 |
|
657 |
|
658 |
int |
659 |
getkey(ekey) /* get input key */ |
660 |
register XKeyPressedEvent *ekey; |
661 |
{ |
662 |
int n; |
663 |
char buf[8]; |
664 |
|
665 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
666 |
if (n != 1) |
667 |
return(1); |
668 |
switch (buf[0]) { |
669 |
case 'h': /* turn on height motion lock */ |
670 |
headlocked = 1; |
671 |
break; |
672 |
case 'H': /* turn off height motion lock */ |
673 |
headlocked = 0; |
674 |
break; |
675 |
case 'l': /* retrieve last (premouse) view */ |
676 |
if (lastview.type) { |
677 |
VIEW vtmp; |
678 |
copystruct(&vtmp, &thisview); |
679 |
dev_view(&lastview); |
680 |
copystruct(&lastview, &vtmp); |
681 |
} else |
682 |
XBell(ourdisplay, 0); |
683 |
break; |
684 |
case 'n': /* move to next standard view */ |
685 |
gotoview(currentview+1); |
686 |
break; |
687 |
case 'p': /* move to last standard view */ |
688 |
gotoview(currentview-1); |
689 |
break; |
690 |
case '+': /* zoom in */ |
691 |
zoomview(100+ZOOMPCT, ekey->x, vres-1-ekey->y); |
692 |
break; |
693 |
case '-': /* zoom out */ |
694 |
zoomview(100-ZOOMPCT, ekey->x, vres-1-ekey->y); |
695 |
break; |
696 |
case 'v': /* spit current view to stdout */ |
697 |
fputs(VIEWSTR, stdout); |
698 |
fprintview(&thisview, stdout); |
699 |
fputc('\n', stdout); |
700 |
break; |
701 |
case 'V': /* append view to rad file */ |
702 |
appendview(NULL, &thisview); |
703 |
break; |
704 |
case 'q': /* quit the program */ |
705 |
return(0); |
706 |
default: |
707 |
XBell(ourdisplay, 0); |
708 |
break; |
709 |
} |
710 |
return(1); |
711 |
} |
712 |
|
713 |
|
714 |
zoomview(pct, dx, dy) /* zoom in or out around (dx,dy) */ |
715 |
int pct; |
716 |
int dx, dy; |
717 |
{ |
718 |
double h, v; |
719 |
FVECT direc; |
720 |
|
721 |
if (pct == 100 | pct <= 0) |
722 |
return; |
723 |
copylastv("zooming"); |
724 |
h = (dx+.5)/hres - 0.5; |
725 |
v = (dy+.5)/vres - 0.5; |
726 |
h *= (1. - 100./pct); |
727 |
v *= (1. - 100./pct); |
728 |
thisview.vdir[0] += h*thisview.hvec[0] + v*thisview.vvec[0]; |
729 |
thisview.vdir[1] += h*thisview.hvec[1] + v*thisview.vvec[1]; |
730 |
thisview.vdir[2] += h*thisview.hvec[2] + v*thisview.vvec[2]; |
731 |
thisview.horiz = 2.*180./PI * atan( 100./pct * |
732 |
tan(PI/180./2.*thisview.horiz) ); |
733 |
thisview.vert = 2.*180./PI * atan( 100./pct * |
734 |
tan(PI/180./2.*thisview.vert) ); |
735 |
setview(&thisview); |
736 |
dev_view(&thisview); |
737 |
} |
738 |
|
739 |
|
740 |
gotoview(vwnum) /* go to specified view number */ |
741 |
int vwnum; |
742 |
{ |
743 |
if (vwnum < 0) |
744 |
for (vwnum = currentview; vwl[vwnum+1].v != NULL; vwnum++) |
745 |
; |
746 |
else if (vwnum >= MAXVIEW || vwl[vwnum].v == NULL) |
747 |
vwnum = 0; |
748 |
if (vwnum == currentview) |
749 |
return; |
750 |
/* copylastv("change view"); */ |
751 |
dev_view(vwl[currentview=vwnum].v); |
752 |
} |
753 |
|
754 |
|
755 |
appendview(nm, vp) /* append standard view */ |
756 |
char *nm; |
757 |
VIEW *vp; |
758 |
{ |
759 |
FILE *fp; |
760 |
/* check if already in there */ |
761 |
if (!bcmp(&thisview, vwl[currentview].v, sizeof(VIEW))) { |
762 |
error(COMMAND, "view already in standard list"); |
763 |
return; |
764 |
} |
765 |
/* append to file */ |
766 |
if ((fp = fopen(radfile, "a")) == NULL) { |
767 |
error(COMMAND, "cannot append rad input file"); |
768 |
return; |
769 |
} |
770 |
fputs("view=", fp); |
771 |
if (nm != NULL) { |
772 |
fputc(' ', fp); fputs(nm, fp); |
773 |
} |
774 |
fprintview(vp, fp); fputc('\n', fp); |
775 |
fclose(fp); |
776 |
/* append to our list */ |
777 |
while (vwl[currentview].v != NULL) |
778 |
currentview++; |
779 |
if (currentview >= MAXVIEW) |
780 |
error(INTERNAL, "too many views in appendview"); |
781 |
vwl[currentview].v = (VIEW *)bmalloc(sizeof(VIEW)); |
782 |
copystruct(vwl[currentview].v, &thisview); |
783 |
if (nm != NULL) |
784 |
vwl[currentview].nam = savqstr(nm); |
785 |
} |
786 |
|
787 |
|
788 |
copylastv(cause) /* copy last view position */ |
789 |
char *cause; |
790 |
{ |
791 |
static char *lastvc; |
792 |
|
793 |
if (cause == lastvc) |
794 |
return; /* only record one view per cause */ |
795 |
lastvc = cause; |
796 |
copystruct(&lastview, &thisview); |
797 |
} |
798 |
|
799 |
|
800 |
fixwindow(eexp) /* repair damage to window */ |
801 |
register XExposeEvent *eexp; |
802 |
{ |
803 |
if (hres == 0 | vres == 0) { /* first exposure */ |
804 |
resizewindow((XConfigureEvent *)eexp); |
805 |
return; |
806 |
} |
807 |
if (eexp->count) /* wait for final exposure */ |
808 |
return; |
809 |
/* rerender everything */ |
810 |
render(); |
811 |
} |
812 |
|
813 |
|
814 |
resizewindow(ersz) /* resize window */ |
815 |
register XConfigureEvent *ersz; |
816 |
{ |
817 |
static char resizing[] = "resizing window"; |
818 |
double wa, va; |
819 |
|
820 |
glViewport(0, 0, hres=ersz->width, vres=ersz->height); |
821 |
if (hres > maxhres) maxhres = hres; |
822 |
if (vres > maxvres) maxvres = vres; |
823 |
if (in_dev_view) |
824 |
return; |
825 |
wa = (vres*pheight)/(hres*pwidth); |
826 |
va = viewaspect(&thisview); |
827 |
if (va > wa+.05) { |
828 |
copylastv(resizing); |
829 |
thisview.vert = 2.*180./PI * |
830 |
atan( tan(PI/180./2. * thisview.horiz) * wa ); |
831 |
} else if (va < wa-.05) { |
832 |
copylastv(resizing); |
833 |
thisview.horiz = 2.*180./PI * |
834 |
atan( tan(PI/180./2. * thisview.vert) / wa ); |
835 |
} else |
836 |
return; |
837 |
setview(&thisview); |
838 |
dev_view(&thisview); |
839 |
} |