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/* 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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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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/* |
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* OpenGL GLX driver for holodeck display. |
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* Based on old GLX driver using cones. |
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#endif |
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#include "standard.h" |
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#include "rhd_sample.h" |
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#include <sys/types.h> |
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#include <GL/glx.h> |
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#include <GL/glu.h> |
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#ifdef STEREO |
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#include <X11/extensions/SGIStereo.h> |
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#endif |
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|
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#include "rhd_sample.h" |
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#ifdef DOBJ |
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#include "rhdobj.h" |
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#endif |
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#include "x11icon.h" |
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|
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#ifndef RAYQLEN |
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< |
#define RAYQLEN 250 /* max. rays to queue before flush */ |
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#define RAYQLEN 1024 /* max. rays to queue before flush */ |
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#endif |
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|
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#ifndef FEQ |
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|
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#define GAMMA 1.4 /* default gamma correction */ |
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|
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#define FRAMESTATE(s) (((s)&(ShiftMask|ControlMask))==(ShiftMask|ControlMask)) |
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|
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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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|
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#ifndef TARGETFPS |
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#define TARGETFPS 4.0 /* target frames/sec during motion */ |
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#define TARGETFPS 2.0 /* target frames/sec during motion */ |
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#endif |
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|
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#define MINWIDTH 480 /* minimum graphics window width */ |
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|
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struct driver odev; /* global device driver structure */ |
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|
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char odev_args[64]; /* command arguments */ |
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|
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#ifdef STEREO |
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static VIEW vwright; /* right eye view */ |
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#endif |
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|
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static int rayqleft = 0; /* rays left to queue before flush */ |
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|
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static int headlocked = 0; /* lock vertical motion */ |
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|
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static int resizewindow(), getevent(), getkey(), moveview(), wipeclean(), |
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setglpersp(), getmove(), fixwindow(), mytmflags(); |
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setglpersp(), getframe(), getmove(), fixwindow(), mytmflags(); |
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|
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#ifdef STEREO |
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static int pushright(), popright(); |
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#endif |
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static double getdistance(); |
111 |
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#define mapdepth(d) ((d)> 0.9995 ? FHUGE: dev_zmin/ \ |
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(1.-(d)*(1.-dev_zmin/dev_zmax))) |
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|
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extern time_t time(); |
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|
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pheight *= 2.; |
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setstereobuf(STEREO_BUFFER_LEFT); |
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#endif |
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checkglerr("setting rendering parameters"); |
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copystruct(&odev.v, &stdview); |
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odev.v.type = VT_PER; |
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/* map the window */ |
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dev_clear() /* clear our representation */ |
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{ |
262 |
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smInit(rsL.max_samp); |
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wipeclean(); |
263 |
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wipeclean(1); |
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rayqleft = 0; /* hold off update */ |
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} |
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|
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dev_input(); /* get resize event */ |
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} |
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copystruct(&odev.v, nv); /* setview() already called */ |
310 |
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} |
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#ifdef STEREO |
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copystruct(&vwright, nv); |
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d = eyesepdist / sqrt(nv->hn2); |
314 |
< |
VSUM(vwright.vp, nv->vp, nv->hvec, d); |
315 |
< |
/* setview(&vwright); -- Unnecessary */ |
312 |
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copystruct(&vwright, nv); |
313 |
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d = eyesepdist / sqrt(nv->hn2); |
314 |
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VSUM(vwright.vp, nv->vp, nv->hvec, d); |
315 |
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/* setview(&vwright); -- Unnecessary */ |
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#endif |
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} |
310 |
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wipeclean(); |
317 |
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wipeclean(0); |
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return(1); |
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} |
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|
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|
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dev_section(gfn, pfn) /* add octree for geometry rendering */ |
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char *gfn, *pfn; |
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{ |
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/* unimplemented */ |
326 |
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} |
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|
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|
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dev_auxcom(cmd, args) /* process an auxiliary command */ |
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char *cmd, *args; |
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{ |
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if (mapped) { |
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#ifdef STEREO |
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pushright(); /* update right eye */ |
407 |
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glClear(GL_DEPTH_BUFFER_BIT); |
394 |
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smUpdate(&vwright, 100); |
407 |
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smUpdate(&vwright, MAXQUALITY); |
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#ifdef DOBJ |
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dobj_render(); /* usually in foreground */ |
410 |
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#endif |
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popright(); /* update left eye */ |
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glClear(GL_DEPTH_BUFFER_BIT); |
412 |
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#endif |
413 |
< |
smUpdate(&odev.v, 100); |
413 |
> |
smUpdate(&odev.v, MAXQUALITY); |
414 |
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checkglerr("rendering mesh"); |
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#ifdef DOBJ |
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dobj_render(); |
447 |
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glPushMatrix(); |
448 |
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d = -eyesepdist / sqrt(odev.v.hn2); |
449 |
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glTranslated(d*odev.v.hvec[0], d*odev.v.hvec[1], d*odev.v.hvec[2]); |
450 |
+ |
checkglerr("setting right view"); |
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} |
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453 |
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500 |
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getkey(levptr(XKeyPressedEvent)); |
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break; |
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case ButtonPress: |
503 |
< |
getmove(levptr(XButtonPressedEvent)); |
503 |
> |
if (FRAMESTATE(levptr(XButtonPressedEvent)->state)) |
504 |
> |
getframe(levptr(XButtonPressedEvent)); |
505 |
> |
else |
506 |
> |
getmove(levptr(XButtonPressedEvent)); |
507 |
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break; |
508 |
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} |
509 |
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} |
522 |
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draw_grids(fore) /* draw holodeck section grids */ |
523 |
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int fore; |
524 |
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{ |
509 |
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if (!mapped) |
510 |
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return; |
525 |
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if (fore) |
526 |
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glColor4ub(0, 255, 255, 0); |
527 |
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else |
529 |
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glBegin(GL_LINES); /* draw each grid line */ |
530 |
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gridlines(draw3dline); |
531 |
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glEnd(); |
532 |
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checkglerr("drawing grid lines"); |
533 |
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} |
534 |
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|
535 |
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static double |
536 |
+ |
getdistance(dx, dy, direc) /* distance from fore plane along view ray */ |
537 |
+ |
int dx, dy; |
538 |
+ |
FVECT direc; |
539 |
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{ |
540 |
+ |
GLfloat gldepth; |
541 |
+ |
double dist; |
542 |
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|
543 |
+ |
if (dx<0 | dx>=odev.hres | dy<0 | dy>=odev.vres) |
544 |
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return(FHUGE); |
545 |
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glReadPixels(dx,dy, 1,1, GL_DEPTH_COMPONENT,GL_FLOAT, &gldepth); |
546 |
+ |
dist = mapdepth(gldepth); |
547 |
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if (dist >= .99*FHUGE) |
548 |
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return(FHUGE); |
549 |
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return((dist-odev.v.vfore)/DOT(direc,odev.v.vdir)); |
550 |
+ |
} |
551 |
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|
552 |
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|
553 |
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static |
554 |
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moveview(dx, dy, mov, orb) /* move our view */ |
555 |
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int dx, dy, mov, orb; |
556 |
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{ |
557 |
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VIEW nv; |
558 |
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FVECT odir, v1, wip; |
559 |
< |
double d; |
559 |
> |
double d,d1; |
560 |
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register int li; |
561 |
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/* start with old view */ |
562 |
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copystruct(&nv, &odev.v); |
565 |
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(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY) |
566 |
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return(0); /* outside view */ |
567 |
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if (mov | orb) { /* moving relative to geometry */ |
568 |
+ |
d = getdistance(dx, dy, odir);/*distance from front plane */ |
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#ifdef DOBJ |
570 |
< |
d = dobj_trace(NULL, v1, odir); /* check objects */ |
570 |
> |
d1 = dobj_trace(NULL, v1, odir); /* check objects */ |
571 |
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/* check holodeck */ |
572 |
< |
if ((li = smFindSamp(v1, odir)) >= 0) { |
573 |
< |
VCOPY(wip, rsL.wp[li]); |
541 |
< |
if (d < .99*FHUGE && d*d <= dist2(v1, wip)) |
542 |
< |
li = -1; /* object is closer */ |
543 |
< |
} else if (d >= .99*FHUGE) |
544 |
< |
return(0); /* nothing visible */ |
545 |
< |
if (li < 0) |
546 |
< |
VSUM(wip, v1, odir, d); /* else get object point */ |
547 |
< |
#else |
548 |
< |
if ((li = smFindSamp(v1, odir)) < 0) |
549 |
< |
return(0); /* not on window */ |
550 |
< |
VCOPY(wip, rsL.wp[li]); |
572 |
> |
if (d1 < d) |
573 |
> |
d = d1; |
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#endif |
575 |
< |
VSUM(odir, wip, odev.v.vp, -1.); |
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], |
583 |
> |
(wip[0]-odev.v.vp[0])*odir[0] + |
584 |
> |
(wip[1]-odev.v.vp[1])*odir[1] + |
585 |
> |
(wip[2]-odev.v.vp[2])*odir[2]); |
586 |
> |
#endif |
587 |
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} else /* panning with constant viewpoint */ |
588 |
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VCOPY(nv.vdir, odir); |
589 |
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if (orb && mov) { /* orbit left/right */ |
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|
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|
617 |
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static |
618 |
+ |
getframe(ebut) /* get focus frame */ |
619 |
+ |
XButtonPressedEvent *ebut; |
620 |
+ |
{ |
621 |
+ |
int startx = ebut->x, starty = ebut->y; |
622 |
+ |
int endx, endy; |
623 |
+ |
|
624 |
+ |
XMaskEvent(ourdisplay, ButtonReleaseMask, levptr(XEvent)); |
625 |
+ |
endx = levptr(XButtonReleasedEvent)->x; |
626 |
+ |
endy = levptr(XButtonReleasedEvent)->y; |
627 |
+ |
if (endx == startx | endy == starty) { |
628 |
+ |
XBell(ourdisplay, 0); |
629 |
+ |
return; |
630 |
+ |
} |
631 |
+ |
if (endx < startx) {register int c = endx; endx = startx; startx = c;} |
632 |
+ |
if (endy < starty) {register int c = endy; endy = starty; starty = c;} |
633 |
+ |
sprintf(odev_args, "%.3f %.3f %.3f %.3f", |
634 |
+ |
(startx+.5)/odev.hres, 1.-(endy+.5)/odev.vres, |
635 |
+ |
(endx+.5)/odev.hres, 1.-(starty+.5)/odev.vres); |
636 |
+ |
inpresflags |= DFL(DC_FOCUS); |
637 |
+ |
} |
638 |
+ |
|
639 |
+ |
|
640 |
+ |
static |
641 |
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getmove(ebut) /* get view change */ |
642 |
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XButtonPressedEvent *ebut; |
643 |
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{ |
644 |
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int movdir = MOVDIR(ebut->button); |
645 |
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int movorb = MOVORB(ebut->state); |
646 |
< |
int qlevel = 99; |
646 |
> |
int qlevel = MAXQUALITY-1; |
647 |
|
time_t lasttime, thistime; |
648 |
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int nframes; |
649 |
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Window rootw, childw; |
650 |
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int rootx, rooty, wx, wy; |
651 |
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unsigned int statemask; |
652 |
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|
653 |
< |
XNoOp(ourdisplay); |
653 |
> |
XNoOp(ourdisplay); /* makes sure we're not idle */ |
654 |
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|
655 |
< |
lasttime = time(0); nframes = 0; |
655 |
> |
nframes = 0; |
656 |
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while (!XCheckMaskEvent(ourdisplay, |
657 |
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ButtonReleaseMask, levptr(XEvent))) { |
658 |
< |
|
658 |
> |
/* get cursor position */ |
659 |
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if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
660 |
|
&rootx, &rooty, &wx, &wy, &statemask)) |
661 |
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break; /* on another screen */ |
662 |
|
|
663 |
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draw_grids(0); /* clear old grid lines */ |
664 |
+ |
#ifdef STEREO |
665 |
+ |
pushright(); draw_grids(0); popright(); |
666 |
+ |
#endif |
667 |
+ |
/* compute view motion */ |
668 |
|
if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) { |
669 |
|
sleep(1); |
670 |
|
lasttime++; |
671 |
< |
continue; |
671 |
> |
continue; /* cursor in bad place */ |
672 |
|
} |
673 |
+ |
draw_grids(1); /* redraw grid */ |
674 |
|
#ifdef STEREO |
675 |
|
pushright(); |
676 |
|
draw_grids(1); |
680 |
|
#endif |
681 |
|
popright(); |
682 |
|
#endif |
683 |
< |
draw_grids(1); |
683 |
> |
/* redraw mesh */ |
684 |
|
smUpdate(&odev.v, qlevel); |
685 |
|
#ifdef DOBJ |
686 |
< |
dobj_render(); |
686 |
> |
dobj_render(); /* redraw object */ |
687 |
|
#endif |
688 |
|
glFlush(); |
689 |
< |
checkglerr("moving view"); |
690 |
< |
nframes++; |
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 |
|
} |
724 |
|
double d, xmin, xmax, ymin, ymax; |
725 |
|
|
726 |
|
if (mindpth >= maxdpth) { |
727 |
< |
dev_zmin = 0.1; |
727 |
> |
dev_zmin = 1.; |
728 |
|
dev_zmax = 100.; |
729 |
|
} else { |
730 |
< |
dev_zmin = 0.5*mindpth; |
731 |
< |
dev_zmax = 1.5*maxdpth; |
667 |
< |
if (dev_zmin > dev_zmax/100.) |
668 |
< |
dev_zmin = dev_zmax/100.; |
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/5000.) |
738 |
< |
dev_zmin = dev_zmax/5000.; |
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); |
753 |
|
odev.v.vp[1] + odev.v.vdir[1], |
754 |
|
odev.v.vp[2] + odev.v.vdir[2], |
755 |
|
odev.v.vup[0], odev.v.vup[1], odev.v.vup[2]); |
756 |
+ |
checkglerr("setting perspective view"); |
757 |
|
} |
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 |
|
|
777 |
|
getkey(ekey) /* get input key */ |
778 |
|
register XKeyPressedEvent *ekey; |
779 |
|
{ |
780 |
+ |
Window rootw, childw; |
781 |
+ |
int rootx, rooty, wx, wy; |
782 |
+ |
unsigned int statemask; |
783 |
|
int n; |
784 |
|
char buf[8]; |
785 |
|
|
802 |
|
case 'v': /* spit out view */ |
803 |
|
inpresflags |= DFL(DC_GETVIEW); |
804 |
|
return; |
805 |
+ |
case 'f': /* frame view position */ |
806 |
+ |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
807 |
+ |
&rootx, &rooty, &wx, &wy, &statemask)) |
808 |
+ |
return; /* on another screen */ |
809 |
+ |
sprintf(odev_args, "%.4f %.4f", (wx+.5)/odev.hres, |
810 |
+ |
1.-(wy+.5)/odev.vres); |
811 |
+ |
inpresflags |= DFL(DC_FOCUS); |
812 |
+ |
return; |
813 |
+ |
case 'F': /* unfocus */ |
814 |
+ |
odev_args[0] = '\0'; |
815 |
+ |
inpresflags |= DFL(DC_FOCUS); |
816 |
+ |
return; |
817 |
|
case '\n': |
818 |
|
case '\r': /* resume computation */ |
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)) |
826 |
|
return; |
827 |
+ |
setglpersp(&odev.v); /* reset clipping planes */ |
828 |
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
829 |
< |
glDisable(GL_DEPTH_TEST); |
829 |
> |
glDisable(GL_DEPTH_TEST); /* so grids will clear */ |
830 |
|
draw_grids(1); |
831 |
|
#ifdef STEREO |
832 |
|
pushright(); |
838 |
|
glFlush(); |
839 |
|
smInit(rsL.max_samp); /* get rid of old values */ |
840 |
|
inpresflags |= DFL(DC_REDRAW); /* resend values from server */ |
760 |
– |
setglpersp(&odev.v); /* reset clipping planes */ |
841 |
|
rayqleft = 0; /* hold off update */ |
842 |
|
return; |
843 |
|
case 'K': /* kill rtrace process(es) */ |
869 |
|
} |
870 |
|
if (eexp->count) /* wait for final exposure */ |
871 |
|
return; |
872 |
< |
wipeclean(); /* clear depth */ |
872 |
> |
wipeclean(0); /* clear depth */ |
873 |
|
} |
874 |
|
|
875 |
|
|