1 |
– |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
2 |
– |
|
1 |
|
#ifndef lint |
2 |
< |
static char SCCSid[] = "$SunId$ SGI"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
3 |
|
#endif |
6 |
– |
|
4 |
|
/* |
5 |
|
* OpenGL GLX driver for holodeck display. |
6 |
|
* Based on old GLX driver using cones. |
19 |
|
|
20 |
|
#include "standard.h" |
21 |
|
|
25 |
– |
#include <sys/types.h> |
22 |
|
#include <GL/glx.h> |
23 |
|
#include <GL/glu.h> |
24 |
|
#ifdef STEREO |
50 |
|
#define MOVORB(s) ((s)&ShiftMask ? 1 : (s)&ControlMask ? -1 : 0) |
51 |
|
|
52 |
|
#ifndef TARGETFPS |
53 |
< |
#define TARGETFPS 4.0 /* target frames/sec during motion */ |
53 |
> |
#define TARGETFPS 2.0 /* target frames/sec during motion */ |
54 |
|
#endif |
55 |
|
|
56 |
|
#define MINWIDTH 480 /* minimum graphics window width */ |
107 |
|
#ifdef STEREO |
108 |
|
static int pushright(), popright(); |
109 |
|
#endif |
110 |
+ |
static double getdistance(); |
111 |
+ |
#define mapdepth(d) ((d)> 0.9995 ? FHUGE: dev_zmin/ \ |
112 |
+ |
(1.-(d)*(1.-dev_zmin/dev_zmax))) |
113 |
|
|
114 |
|
extern time_t time(); |
115 |
|
|
260 |
|
dev_clear() /* clear our representation */ |
261 |
|
{ |
262 |
|
smInit(rsL.max_samp); |
263 |
< |
wipeclean(); |
263 |
> |
wipeclean(1); |
264 |
|
rayqleft = 0; /* hold off update */ |
265 |
|
} |
266 |
|
|
307 |
|
dev_input(); /* get resize event */ |
308 |
|
} |
309 |
|
copystruct(&odev.v, nv); /* setview() already called */ |
310 |
+ |
} |
311 |
|
#ifdef STEREO |
312 |
< |
copystruct(&vwright, nv); |
313 |
< |
d = eyesepdist / sqrt(nv->hn2); |
314 |
< |
VSUM(vwright.vp, nv->vp, nv->hvec, d); |
315 |
< |
/* setview(&vwright); -- Unnecessary */ |
312 |
> |
copystruct(&vwright, nv); |
313 |
> |
d = eyesepdist / sqrt(nv->hn2); |
314 |
> |
VSUM(vwright.vp, nv->vp, nv->hvec, d); |
315 |
> |
/* setview(&vwright); -- Unnecessary */ |
316 |
|
#endif |
317 |
< |
} |
318 |
< |
wipeclean(); |
317 |
> |
wipeclean(0); |
318 |
|
return(1); |
319 |
|
} |
320 |
|
|
321 |
|
|
322 |
< |
dev_section(ofn) /* add octree for geometry rendering */ |
323 |
< |
char *ofn; |
322 |
> |
dev_section(gfn, pfn) /* add octree for geometry rendering */ |
323 |
> |
char *gfn, *pfn; |
324 |
|
{ |
325 |
|
/* unimplemented */ |
326 |
|
} |
404 |
|
if (mapped) { |
405 |
|
#ifdef STEREO |
406 |
|
pushright(); /* update right eye */ |
407 |
< |
smUpdate(&vwright, 100); |
407 |
> |
smUpdate(&vwright, MAXQUALITY); |
408 |
|
#ifdef DOBJ |
409 |
|
dobj_render(); /* usually in foreground */ |
410 |
|
#endif |
411 |
|
popright(); /* update left eye */ |
412 |
|
#endif |
413 |
< |
smUpdate(&odev.v, 100); |
413 |
> |
smUpdate(&odev.v, MAXQUALITY); |
414 |
|
checkglerr("rendering mesh"); |
415 |
|
#ifdef DOBJ |
416 |
|
dobj_render(); |
532 |
|
checkglerr("drawing grid lines"); |
533 |
|
} |
534 |
|
|
535 |
+ |
static double |
536 |
+ |
getdistance(dx, dy, direc) /* distance from fore plane along view ray */ |
537 |
+ |
int dx, dy; |
538 |
+ |
FVECT direc; |
539 |
+ |
{ |
540 |
+ |
GLfloat gldepth; |
541 |
+ |
double dist; |
542 |
|
|
543 |
+ |
if (dx<0 | dx>=odev.hres | dy<0 | dy>=odev.vres) |
544 |
+ |
return(FHUGE); |
545 |
+ |
glReadPixels(dx,dy, 1,1, GL_DEPTH_COMPONENT,GL_FLOAT, &gldepth); |
546 |
+ |
dist = mapdepth(gldepth); |
547 |
+ |
if (dist >= .99*FHUGE) |
548 |
+ |
return(FHUGE); |
549 |
+ |
return((dist-odev.v.vfore)/DOT(direc,odev.v.vdir)); |
550 |
+ |
} |
551 |
+ |
|
552 |
+ |
|
553 |
|
static |
554 |
|
moveview(dx, dy, mov, orb) /* move our view */ |
555 |
|
int dx, dy, mov, orb; |
556 |
|
{ |
557 |
|
VIEW nv; |
558 |
|
FVECT odir, v1, wip; |
559 |
< |
double d; |
559 |
> |
double d,d1; |
560 |
|
register int li; |
561 |
|
/* start with old view */ |
562 |
|
copystruct(&nv, &odev.v); |
565 |
|
(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY) |
566 |
|
return(0); /* outside view */ |
567 |
|
if (mov | orb) { /* moving relative to geometry */ |
568 |
+ |
d = getdistance(dx, dy, odir);/*distance from front plane */ |
569 |
|
#ifdef DOBJ |
570 |
< |
d = dobj_trace(NULL, v1, odir); /* check objects */ |
570 |
> |
d1 = dobj_trace(NULL, v1, odir); /* check objects */ |
571 |
|
/* check holodeck */ |
572 |
< |
if ((li = smFindSamp(v1, odir)) >= 0) { |
573 |
< |
VCOPY(wip, rsL.wp[li]); |
557 |
< |
if (d < .99*FHUGE && d*d <= dist2(v1, wip)) |
558 |
< |
li = -1; /* object is closer */ |
559 |
< |
} else if (d >= .99*FHUGE) |
560 |
< |
return(0); /* nothing visible */ |
561 |
< |
if (li < 0) |
562 |
< |
VSUM(wip, v1, odir, d); /* else get object point */ |
563 |
< |
#else |
564 |
< |
if ((li = smFindSamp(v1, odir)) < 0) |
565 |
< |
return(0); /* not on window */ |
566 |
< |
VCOPY(wip, rsL.wp[li]); |
572 |
> |
if (d1 < d) |
573 |
> |
d = d1; |
574 |
|
#endif |
575 |
< |
#ifdef DEBUG |
575 |
> |
if (d >= .99*FHUGE) |
576 |
> |
d = 0.5*(dev_zmax+dev_zmin); /* just guess */ |
577 |
> |
VSUM(wip, v1, odir, d); |
578 |
> |
VSUB(odir, wip, odev.v.vp); |
579 |
> |
#if 0 |
580 |
|
fprintf(stderr, "moveview: hit %s at (%f,%f,%f) (t=%f)\n", |
581 |
|
li < 0 ? "object" : "mesh", |
582 |
|
wip[0], wip[1], wip[2], |
584 |
|
(wip[1]-odev.v.vp[1])*odir[1] + |
585 |
|
(wip[2]-odev.v.vp[2])*odir[2]); |
586 |
|
#endif |
576 |
– |
VSUM(odir, wip, odev.v.vp, -1.); |
587 |
|
} else /* panning with constant viewpoint */ |
588 |
|
VCOPY(nv.vdir, odir); |
589 |
|
if (orb && mov) { /* orbit left/right */ |
643 |
|
{ |
644 |
|
int movdir = MOVDIR(ebut->button); |
645 |
|
int movorb = MOVORB(ebut->state); |
646 |
< |
int qlevel = 99; |
646 |
> |
int qlevel = MAXQUALITY-1; |
647 |
|
time_t lasttime, thistime; |
648 |
|
int nframes; |
649 |
|
Window rootw, childw; |
652 |
|
|
653 |
|
XNoOp(ourdisplay); /* makes sure we're not idle */ |
654 |
|
|
655 |
< |
lasttime = time(0); nframes = 0; |
655 |
> |
nframes = 0; |
656 |
|
while (!XCheckMaskEvent(ourdisplay, |
657 |
|
ButtonReleaseMask, levptr(XEvent))) { |
658 |
|
/* get cursor position */ |
686 |
|
dobj_render(); /* redraw object */ |
687 |
|
#endif |
688 |
|
glFlush(); |
689 |
< |
nframes++; /* figure out good quality level */ |
689 |
> |
/* figure out good quality level */ |
690 |
> |
if (!nframes++) { /* ignore first frame */ |
691 |
> |
lasttime = time(0); |
692 |
> |
continue; |
693 |
> |
} |
694 |
|
thistime = time(0); |
695 |
< |
if (thistime - lasttime >= 3 || |
695 |
> |
if (thistime - lasttime >= 6 || |
696 |
|
nframes > (int)(3*3*TARGETFPS)) { |
697 |
< |
qlevel = thistime<=lasttime ? 1000 : |
697 |
> |
qlevel = thistime<=lasttime ? 3*MAXQUALITY : |
698 |
|
(int)((double)nframes/(thistime-lasttime) |
699 |
|
/ TARGETFPS * qlevel + 0.5); |
700 |
< |
lasttime = thistime; nframes = 0; |
701 |
< |
if (qlevel > 99) { |
702 |
< |
if (qlevel > 300) { /* put on the brakes */ |
700 |
> |
nframes = 0; |
701 |
> |
if (qlevel >= MAXQUALITY) { |
702 |
> |
if (qlevel >= 3*MAXQUALITY) { /* brakes!! */ |
703 |
|
sleep(1); |
704 |
|
lasttime++; |
705 |
|
} |
706 |
< |
qlevel = 99; |
706 |
> |
qlevel = MAXQUALITY-1; |
707 |
|
} else if (qlevel < 1) |
708 |
|
qlevel = 1; |
709 |
|
} |
727 |
|
dev_zmin = 1.; |
728 |
|
dev_zmax = 100.; |
729 |
|
} else { |
730 |
< |
dev_zmin = 0.5*mindpth; |
731 |
< |
dev_zmax = 1.5*maxdpth; |
718 |
< |
if (dev_zmin > dev_zmax/5.) |
719 |
< |
dev_zmin = dev_zmax/5.; |
730 |
> |
dev_zmin = 0.1*mindpth; |
731 |
> |
dev_zmax = 5.0*maxdpth; |
732 |
|
} |
733 |
|
if (odev.v.vfore > FTINY) |
734 |
|
dev_zmin = odev.v.vfore; |
735 |
|
if (odev.v.vaft > FTINY) |
736 |
|
dev_zmax = odev.v.vaft; |
737 |
< |
if (dev_zmin < dev_zmax/100.) |
738 |
< |
dev_zmin = dev_zmax/100.; |
737 |
> |
if (dev_zmin*500. < dev_zmax) |
738 |
> |
dev_zmax = dev_zmin*500.; |
739 |
|
xmax = dev_zmin * tan(PI/180./2. * odev.v.horiz); |
740 |
|
xmin = -xmax; |
741 |
|
d = odev.v.hoff * (xmax - xmin); |
758 |
|
|
759 |
|
|
760 |
|
static |
761 |
< |
wipeclean() /* prepare for redraw */ |
761 |
> |
wipeclean(tmflag) /* prepare for redraw */ |
762 |
> |
int tmflag; |
763 |
|
{ |
764 |
|
/* clear depth buffer */ |
765 |
|
#ifdef STEREO |
768 |
|
setstereobuf(STEREO_BUFFER_LEFT); |
769 |
|
#endif |
770 |
|
glClear(GL_DEPTH_BUFFER_BIT); |
771 |
< |
smClean(); /* reset drawing routines */ |
771 |
> |
smClean(tmflag); /* reset drawing routines */ |
772 |
|
setglpersp(&odev.v); /* reset view & clipping planes */ |
773 |
|
} |
774 |
|
|
819 |
|
inpresflags |= DFL(DC_RESUME); |
820 |
|
return; |
821 |
|
case CTRL('R'): /* redraw screen */ |
822 |
< |
wipeclean(); |
822 |
> |
wipeclean(1); |
823 |
|
return; |
824 |
|
case CTRL('L'): /* refresh from server */ |
825 |
|
if (inpresflags & DFL(DC_REDRAW)) |
869 |
|
} |
870 |
|
if (eexp->count) /* wait for final exposure */ |
871 |
|
return; |
872 |
< |
wipeclean(); /* clear depth */ |
872 |
> |
wipeclean(0); /* clear depth */ |
873 |
|
} |
874 |
|
|
875 |
|
|