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#ifndef lint
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static const char RCSid[] = "$Id: rhd_glx.c,v 3.31 2003/09/19 18:33:04 greg Exp $";
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#endif
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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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*
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* Define symbol STEREO for stereo viewing.
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* Define symbol DOBJ for display object viewing.
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*/
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#ifdef NOSTEREO
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#ifdef STEREO
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#undef STEREO
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#else
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#undef NOSTEREO
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#endif
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#endif
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#include "standard.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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#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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#ifndef RAYQLEN
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#define RAYQLEN 1024 /* max. rays to queue before flush */
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#endif
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#ifndef FEQ
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#define FEQ(a,b) ((a)-(b) <= FTINY && (a)-(b) >= -FTINY)
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#endif
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#define GAMMA 1.4 /* default gamma correction */
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#define FRAMESTATE(s) (((s)&(ShiftMask|ControlMask))==(ShiftMask|ControlMask))
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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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#ifndef TARGETFPS
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#define TARGETFPS 2.0 /* target frames/sec during motion */
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#endif
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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 VIEWDIST 356 /* assumed viewing distance (mm) */
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#define BORWIDTH 5 /* border width */
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#define setstereobuf(bid) (glXWaitGL(), \
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XSGISetStereoBuffer(ourdisplay, gwind, bid), \
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glXWaitX())
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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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struct driver odev; /* global device driver structure */
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char odev_args[64]; /* command arguments */
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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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static int rayqleft = 0; /* rays left to queue before flush */
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static XEvent currentevent; /* current event */
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static int mapped = 0; /* window is mapped? */
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static unsigned long ourblack=0, ourwhite=~0;
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static Display *ourdisplay = NULL; /* our display */
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static XVisualInfo *ourvinf; /* our visual information */
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static Window gwind = 0; /* our graphics window */
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static GLXContext gctx; /* our GLX context */
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static double pwidth, pheight; /* pixel dimensions (mm) */
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static double mindpth, maxdpth; /* min. and max. depth */
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double dev_zmin, dev_zmax; /* fore and aft clipping plane dist. */
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static int inpresflags; /* input result flags */
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static int headlocked = 0; /* lock vertical motion */
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static int resizewindow(), getevent(), getkey(), moveview(), wipeclean(),
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setglpersp(), getframe(), getmove(), fixwindow(), mytmflags();
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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();
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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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extern time_t time();
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dev_open(id) /* initialize GLX driver */
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char *id;
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{
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extern char *getenv();
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static RGBPRIMS myprims = STDPRIMS;
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static int atlBest[] = {GLX_RGBA, GLX_RED_SIZE,8,
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GLX_GREEN_SIZE,8, GLX_BLUE_SIZE,8,
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GLX_DEPTH_SIZE,15, None};
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char *ev;
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double gamval = GAMMA;
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RGBPRIMP dpri = stdprims;
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XSetWindowAttributes ourwinattr;
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XWMHints ourxwmhints;
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XSizeHints oursizhints;
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/* check for unsupported stereo */
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#ifdef NOSTEREO
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error(INTERNAL, "stereo display driver unavailable");
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#endif
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/* open display server */
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ourdisplay = XOpenDisplay(NULL);
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if (ourdisplay == NULL)
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error(USER, "cannot open X-windows; DISPLAY variable set?\n");
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#ifdef STEREO
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switch (XSGIQueryStereoMode(ourdisplay, ourroot)) {
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case STEREO_TOP:
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case STEREO_BOTTOM:
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break;
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case STEREO_OFF:
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error(USER,
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"wrong video mode: run \"/usr/gfx/setmon -n STR_TOP\" first");
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case X_STEREO_UNSUPPORTED:
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error(USER, "stereo mode not supported on this screen");
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default:
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error(INTERNAL, "unknown stereo mode");
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}
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#endif
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/* find a usable visual */
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ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlBest);
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if (ourvinf == NULL)
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error(USER, "no suitable visuals available");
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/* get a context */
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gctx = glXCreateContext(ourdisplay, ourvinf, NULL, GL_TRUE);
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/* set gamma and tone mapping */
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if ((ev = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL
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|| (ev = getenv("DISPLAY_GAMMA")) != NULL)
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gamval = atof(ev);
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if ((ev = getenv("DISPLAY_PRIMARIES")) != NULL &&
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sscanf(ev, "%f %f %f %f %f %f %f %f",
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&myprims[RED][CIEX],&myprims[RED][CIEY],
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&myprims[GRN][CIEX],&myprims[GRN][CIEY],
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&myprims[BLU][CIEX],&myprims[BLU][CIEY],
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&myprims[WHT][CIEX],&myprims[WHT][CIEY]) >= 6)
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dpri = myprims;
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if (tmInit(mytmflags(), dpri, gamval) == NULL)
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error(SYSTEM, "not enough memory in dev_open");
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/* open window */
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ourwinattr.background_pixel = ourblack;
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ourwinattr.border_pixel = ourblack;
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ourwinattr.event_mask = ourmask;
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/* this is stupid */
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ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot,
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ourvinf->visual, AllocNone);
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gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
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DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
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#ifdef STEREO
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(DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH)/2,
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#else
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DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
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#endif
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BORWIDTH, ourvinf->depth, InputOutput, ourvinf->visual,
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CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &ourwinattr);
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if (gwind == 0)
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error(SYSTEM, "cannot create window\n");
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XStoreName(ourdisplay, gwind, id);
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/* set window manager hints */
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ourxwmhints.flags = InputHint|IconPixmapHint;
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ourxwmhints.input = True;
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ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay,
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gwind, x11icon_bits, x11icon_width, x11icon_height);
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XSetWMHints(ourdisplay, gwind, &ourxwmhints);
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oursizhints.min_width = MINWIDTH;
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#ifdef STEREO
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oursizhints.min_height = MINHEIGHT/2;
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oursizhints.max_width = DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH;
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oursizhints.max_height = (DisplayHeight(ourdisplay,ourscreen) -
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2*BORWIDTH)/2;
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oursizhints.flags = PMinSize|PMaxSize;
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#else
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oursizhints.min_height = MINHEIGHT;
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oursizhints.flags = PMinSize;
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#endif
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XSetNormalHints(ourdisplay, gwind, &oursizhints);
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/* set GLX context */
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glXMakeCurrent(ourdisplay, gwind, gctx);
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glEnable(GL_DEPTH_TEST);
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glDepthFunc(GL_LEQUAL);
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glShadeModel(GL_SMOOTH);
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glDisable(GL_DITHER);
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glDisable(GL_CULL_FACE);
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/* figure out sensible view */
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pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) /
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DisplayWidth(ourdisplay, ourscreen);
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pheight = (double)DisplayHeightMM(ourdisplay, ourscreen) /
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DisplayHeight(ourdisplay, ourscreen);
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#ifdef STEREO
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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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odev.v = stdview;
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odev.v.type = VT_PER;
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/* map the window */
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XMapWindow(ourdisplay, gwind);
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dev_input(); /* sets size and view angles */
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/* allocate our samples */
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if (!smInit(DisplayWidth(ourdisplay,ourscreen) *
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DisplayHeight(ourdisplay,ourscreen) / 10))
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error(SYSTEM, "insufficient memory for value storage");
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mindpth = FHUGE; maxdpth = FTINY;
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odev.name = id;
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odev.ifd = ConnectionNumber(ourdisplay);
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}
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dev_close() /* close our display and free resources */
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{
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smInit(0);
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#ifdef DOBJ
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dobj_cleanup();
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#endif
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glXMakeCurrent(ourdisplay, None, NULL);
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glXDestroyContext(ourdisplay, gctx);
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XDestroyWindow(ourdisplay, gwind);
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gwind = 0;
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XCloseDisplay(ourdisplay);
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ourdisplay = NULL;
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tmDone(NULL);
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odev.v.type = 0;
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odev.hres = odev.vres = 0;
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odev.ifd = -1;
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}
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dev_clear() /* clear our representation */
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{
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smInit(rsL.max_samp);
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wipeclean(1);
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rayqleft = 0; /* hold off update */
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}
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int
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dev_view(nv) /* assign new driver view */
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register VIEW *nv;
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{
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double d;
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if (nv->type != VT_PER || /* check view legality */
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nv->horiz > 160. || nv->vert > 160.) {
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error(COMMAND, "illegal view type/angle");
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nv->type = odev.v.type;
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nv->horiz = odev.v.horiz;
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nv->vert = odev.v.vert;
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return(0);
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}
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if (nv != &odev.v) {
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/* resize window? */
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if (!FEQ(nv->horiz,odev.v.horiz) ||
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!FEQ(nv->vert,odev.v.vert)) {
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int dw = DisplayWidth(ourdisplay,ourscreen);
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int dh = DisplayHeight(ourdisplay,ourscreen);
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dw -= 25; /* for window frame */
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dh -= 50;
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#ifdef STEREO
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dh /= 2;
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#endif
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odev.hres = 2.*VIEWDIST/pwidth *
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tan(PI/180./2.*nv->horiz);
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odev.vres = 2.*VIEWDIST/pheight *
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tan(PI/180./2.*nv->vert);
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if (odev.hres > dw) {
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odev.vres = dw * odev.vres / odev.hres;
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odev.hres = dw;
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}
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if (odev.vres > dh) {
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odev.hres = dh * odev.hres / odev.vres;
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odev.vres = dh;
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}
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XResizeWindow(ourdisplay, gwind, odev.hres, odev.vres);
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dev_input(); /* get resize event */
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}
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odev.v = *nv; /* setview() already called */
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}
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#ifdef STEREO
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vwright = *nv;
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d = eyesepdist / sqrt(nv->hn2);
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VSUM(vwright.vp, nv->vp, nv->hvec, d);
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/* setview(&vwright); -- Unnecessary */
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#endif
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wipeclean(0);
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return(1);
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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 */
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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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#ifdef DOBJ
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if (dobj_command(cmd, args) >= 0)
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return;
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#endif
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sprintf(errmsg, "%s: unknown command", cmd);
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error(COMMAND, errmsg);
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}
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VIEW *
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dev_auxview(n, hvres) /* return nth auxiliary view */
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int n;
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int hvres[2];
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{
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| 346 |
hvres[0] = odev.hres; hvres[1] = odev.vres;
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| 347 |
if (n == 0)
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| 348 |
return(&odev.v);
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| 349 |
#ifdef STEREO
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| 350 |
if (n == 1)
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| 351 |
return(&vwright);
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| 352 |
#endif
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| 353 |
return(NULL);
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| 354 |
}
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int
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dev_input() /* get X11 input */
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| 359 |
{
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| 360 |
inpresflags = 0;
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| 361 |
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| 362 |
do
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| 363 |
getevent();
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| 364 |
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| 365 |
while (XPending(ourdisplay) > 0);
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| 366 |
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| 367 |
odev.inpready = 0;
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| 368 |
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| 369 |
return(inpresflags);
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| 370 |
}
|
| 371 |
|
| 372 |
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| 373 |
dev_value(c, d, p) /* add a pixel value to our mesh */
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| 374 |
COLR c;
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| 375 |
FVECT d, p;
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| 376 |
{
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| 377 |
double depth;
|
| 378 |
#ifdef DOBJ
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| 379 |
if (dobj_lightsamp != NULL) { /* in light source sampling */
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| 380 |
(*dobj_lightsamp)(c, d, p);
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| 381 |
return;
|
| 382 |
}
|
| 383 |
#endif
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| 384 |
if (p != NULL) { /* add depth to our range */
|
| 385 |
depth = (p[0] - odev.v.vp[0])*d[0] +
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| 386 |
(p[1] - odev.v.vp[1])*d[1] +
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| 387 |
(p[2] - odev.v.vp[2])*d[2];
|
| 388 |
if (depth > FTINY) {
|
| 389 |
if (depth < mindpth)
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| 390 |
mindpth = depth;
|
| 391 |
if (depth > maxdpth)
|
| 392 |
maxdpth = depth;
|
| 393 |
}
|
| 394 |
}
|
| 395 |
smNewSamp(c, d, p); /* add to display representation */
|
| 396 |
if (!--rayqleft)
|
| 397 |
dev_flush(); /* flush output */
|
| 398 |
}
|
| 399 |
|
| 400 |
|
| 401 |
int
|
| 402 |
dev_flush() /* flush output */
|
| 403 |
{
|
| 404 |
if (mapped) {
|
| 405 |
#ifdef STEREO
|
| 406 |
pushright(); /* update right eye */
|
| 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, MAXQUALITY);
|
| 414 |
checkglerr("rendering mesh");
|
| 415 |
#ifdef DOBJ
|
| 416 |
dobj_render();
|
| 417 |
#endif
|
| 418 |
glFlush(); /* flush OGL */
|
| 419 |
}
|
| 420 |
rayqleft = RAYQLEN;
|
| 421 |
/* flush X11 and return # pending */
|
| 422 |
return(odev.inpready = XPending(ourdisplay));
|
| 423 |
}
|
| 424 |
|
| 425 |
|
| 426 |
checkglerr(where) /* check for GL or GLU error */
|
| 427 |
char *where;
|
| 428 |
{
|
| 429 |
register GLenum errcode;
|
| 430 |
|
| 431 |
while ((errcode = glGetError()) != GL_NO_ERROR) {
|
| 432 |
sprintf(errmsg, "OpenGL error %s: %s",
|
| 433 |
where, gluErrorString(errcode));
|
| 434 |
error(WARNING, errmsg);
|
| 435 |
}
|
| 436 |
}
|
| 437 |
|
| 438 |
|
| 439 |
#ifdef STEREO
|
| 440 |
static
|
| 441 |
pushright() /* push on right view */
|
| 442 |
{
|
| 443 |
double d;
|
| 444 |
|
| 445 |
setstereobuf(STEREO_BUFFER_RIGHT);
|
| 446 |
glMatrixMode(GL_MODELVIEW);
|
| 447 |
glPushMatrix();
|
| 448 |
d = -eyesepdist / sqrt(odev.v.hn2);
|
| 449 |
glTranslated(d*odev.v.hvec[0], d*odev.v.hvec[1], d*odev.v.hvec[2]);
|
| 450 |
checkglerr("setting right view");
|
| 451 |
}
|
| 452 |
|
| 453 |
|
| 454 |
static
|
| 455 |
popright() /* pop off right view */
|
| 456 |
{
|
| 457 |
glMatrixMode(GL_MODELVIEW);
|
| 458 |
glPopMatrix();
|
| 459 |
setstereobuf(STEREO_BUFFER_LEFT);
|
| 460 |
}
|
| 461 |
#endif
|
| 462 |
|
| 463 |
|
| 464 |
static int
|
| 465 |
mytmflags() /* figure out tone mapping flags */
|
| 466 |
{
|
| 467 |
extern char *progname;
|
| 468 |
register char *cp, *tail;
|
| 469 |
/* find basic name */
|
| 470 |
for (cp = tail = progname; *cp; cp++)
|
| 471 |
if (*cp == '/')
|
| 472 |
tail = cp+1;
|
| 473 |
for (cp = tail; *cp && *cp != '.'; cp++)
|
| 474 |
;
|
| 475 |
if (cp > tail && cp[-1] == 'h')
|
| 476 |
return(TM_F_HUMAN|TM_F_NOSTDERR);
|
| 477 |
else
|
| 478 |
return(TM_F_CAMERA|TM_F_NOSTDERR);
|
| 479 |
}
|
| 480 |
|
| 481 |
|
| 482 |
static
|
| 483 |
getevent() /* get next event */
|
| 484 |
{
|
| 485 |
XNextEvent(ourdisplay, levptr(XEvent));
|
| 486 |
switch (levptr(XEvent)->type) {
|
| 487 |
case ConfigureNotify:
|
| 488 |
resizewindow(levptr(XConfigureEvent));
|
| 489 |
break;
|
| 490 |
case UnmapNotify:
|
| 491 |
mapped = 0;
|
| 492 |
break;
|
| 493 |
case MapNotify:
|
| 494 |
mapped = 1;
|
| 495 |
break;
|
| 496 |
case Expose:
|
| 497 |
fixwindow(levptr(XExposeEvent));
|
| 498 |
break;
|
| 499 |
case KeyPress:
|
| 500 |
getkey(levptr(XKeyPressedEvent));
|
| 501 |
break;
|
| 502 |
case ButtonPress:
|
| 503 |
if (FRAMESTATE(levptr(XButtonPressedEvent)->state))
|
| 504 |
getframe(levptr(XButtonPressedEvent));
|
| 505 |
else
|
| 506 |
getmove(levptr(XButtonPressedEvent));
|
| 507 |
break;
|
| 508 |
}
|
| 509 |
}
|
| 510 |
|
| 511 |
|
| 512 |
static
|
| 513 |
draw3dline(wp) /* draw 3d line in world coordinates */
|
| 514 |
register FVECT wp[2];
|
| 515 |
{
|
| 516 |
glVertex3d(wp[0][0], wp[0][1], wp[0][2]);
|
| 517 |
glVertex3d(wp[1][0], wp[1][1], wp[1][2]);
|
| 518 |
}
|
| 519 |
|
| 520 |
|
| 521 |
static
|
| 522 |
draw_grids(fore) /* draw holodeck section grids */
|
| 523 |
int fore;
|
| 524 |
{
|
| 525 |
if (fore)
|
| 526 |
glColor4ub(0, 255, 255, 0);
|
| 527 |
else
|
| 528 |
glColor4ub(0, 0, 0, 0);
|
| 529 |
glBegin(GL_LINES); /* draw each grid line */
|
| 530 |
gridlines(draw3dline);
|
| 531 |
glEnd();
|
| 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 |
if (gldepth <= FTINY)
|
| 547 |
return (FHUGE); /* call failed */
|
| 548 |
dist = mapdepth(gldepth);
|
| 549 |
if (dist >= .99*FHUGE)
|
| 550 |
return(FHUGE);
|
| 551 |
return((dist-odev.v.vfore)/DOT(direc,odev.v.vdir));
|
| 552 |
}
|
| 553 |
|
| 554 |
|
| 555 |
static
|
| 556 |
moveview(dx, dy, mov, orb) /* move our view */
|
| 557 |
int dx, dy, mov, orb;
|
| 558 |
{
|
| 559 |
VIEW nv;
|
| 560 |
FVECT odir, v1, wip;
|
| 561 |
double d,d1;
|
| 562 |
register int li;
|
| 563 |
/* start with old view */
|
| 564 |
nv = odev.v;
|
| 565 |
/* orient our motion */
|
| 566 |
if (viewray(v1, odir, &odev.v,
|
| 567 |
(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY)
|
| 568 |
return(0); /* outside view */
|
| 569 |
if (mov | orb) { /* moving relative to geometry */
|
| 570 |
d = getdistance(dx, dy, odir);/*distance from front plane */
|
| 571 |
#ifdef DOBJ
|
| 572 |
d1 = dobj_trace(NULL, v1, odir); /* check objects */
|
| 573 |
/* check holodeck */
|
| 574 |
if (d1 < d)
|
| 575 |
d = d1;
|
| 576 |
#endif
|
| 577 |
if (d >= .99*FHUGE)
|
| 578 |
d = 0.5*(dev_zmax+dev_zmin); /* just guess */
|
| 579 |
VSUM(wip, v1, odir, d);
|
| 580 |
VSUB(odir, wip, odev.v.vp);
|
| 581 |
#if 0
|
| 582 |
fprintf(stderr, "moveview: hit %s at (%f,%f,%f) (t=%f)\n",
|
| 583 |
li < 0 ? "object" : "mesh",
|
| 584 |
wip[0], wip[1], wip[2],
|
| 585 |
(wip[0]-odev.v.vp[0])*odir[0] +
|
| 586 |
(wip[1]-odev.v.vp[1])*odir[1] +
|
| 587 |
(wip[2]-odev.v.vp[2])*odir[2]);
|
| 588 |
#endif
|
| 589 |
} else /* panning with constant viewpoint */
|
| 590 |
VCOPY(nv.vdir, odir);
|
| 591 |
if (orb && mov) { /* orbit left/right */
|
| 592 |
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov);
|
| 593 |
VSUM(nv.vp, wip, odir, -1.);
|
| 594 |
spinvector(nv.vdir, nv.vdir, nv.vup, d);
|
| 595 |
} else if (orb) { /* orbit up/down */
|
| 596 |
fcross(v1, odir, nv.vup);
|
| 597 |
if (normalize(v1) == 0.)
|
| 598 |
return(0);
|
| 599 |
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb);
|
| 600 |
VSUM(nv.vp, wip, odir, -1.);
|
| 601 |
spinvector(nv.vdir, nv.vdir, v1, d);
|
| 602 |
} else if (mov) { /* move forward/backward */
|
| 603 |
d = MOVPCT/100. * mov;
|
| 604 |
VSUM(nv.vp, nv.vp, odir, d);
|
| 605 |
}
|
| 606 |
if (!mov ^ !orb && headlocked) { /* restore head height */
|
| 607 |
VSUM(v1, odev.v.vp, nv.vp, -1.);
|
| 608 |
d = DOT(v1, nv.vup);
|
| 609 |
VSUM(nv.vp, nv.vp, odev.v.vup, d);
|
| 610 |
}
|
| 611 |
if (setview(&nv) != NULL)
|
| 612 |
return(0); /* illegal view */
|
| 613 |
dev_view(&nv);
|
| 614 |
inpresflags |= DFL(DC_SETVIEW);
|
| 615 |
return(1);
|
| 616 |
}
|
| 617 |
|
| 618 |
|
| 619 |
static
|
| 620 |
getframe(ebut) /* get focus frame */
|
| 621 |
XButtonPressedEvent *ebut;
|
| 622 |
{
|
| 623 |
int startx = ebut->x, starty = ebut->y;
|
| 624 |
int endx, endy;
|
| 625 |
|
| 626 |
XMaskEvent(ourdisplay, ButtonReleaseMask, levptr(XEvent));
|
| 627 |
endx = levptr(XButtonReleasedEvent)->x;
|
| 628 |
endy = levptr(XButtonReleasedEvent)->y;
|
| 629 |
if (endx == startx | endy == starty) {
|
| 630 |
XBell(ourdisplay, 0);
|
| 631 |
return;
|
| 632 |
}
|
| 633 |
if (endx < startx) {register int c = endx; endx = startx; startx = c;}
|
| 634 |
if (endy < starty) {register int c = endy; endy = starty; starty = c;}
|
| 635 |
sprintf(odev_args, "%.3f %.3f %.3f %.3f",
|
| 636 |
(startx+.5)/odev.hres, 1.-(endy+.5)/odev.vres,
|
| 637 |
(endx+.5)/odev.hres, 1.-(starty+.5)/odev.vres);
|
| 638 |
inpresflags |= DFL(DC_FOCUS);
|
| 639 |
}
|
| 640 |
|
| 641 |
|
| 642 |
static
|
| 643 |
getmove(ebut) /* get view change */
|
| 644 |
XButtonPressedEvent *ebut;
|
| 645 |
{
|
| 646 |
int movdir = MOVDIR(ebut->button);
|
| 647 |
int movorb = MOVORB(ebut->state);
|
| 648 |
int qlevel = MAXQUALITY-1;
|
| 649 |
time_t lasttime, thistime;
|
| 650 |
int nframes;
|
| 651 |
Window rootw, childw;
|
| 652 |
int rootx, rooty, wx, wy;
|
| 653 |
unsigned int statemask;
|
| 654 |
|
| 655 |
XNoOp(ourdisplay); /* makes sure we're not idle */
|
| 656 |
|
| 657 |
nframes = 0;
|
| 658 |
while (!XCheckMaskEvent(ourdisplay,
|
| 659 |
ButtonReleaseMask, levptr(XEvent))) {
|
| 660 |
/* get cursor position */
|
| 661 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw,
|
| 662 |
&rootx, &rooty, &wx, &wy, &statemask))
|
| 663 |
break; /* on another screen */
|
| 664 |
|
| 665 |
draw_grids(0); /* clear old grid lines */
|
| 666 |
#ifdef STEREO
|
| 667 |
pushright(); draw_grids(0); popright();
|
| 668 |
#endif
|
| 669 |
/* compute view motion */
|
| 670 |
if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) {
|
| 671 |
sleep(1);
|
| 672 |
lasttime++;
|
| 673 |
continue; /* cursor in bad place */
|
| 674 |
}
|
| 675 |
draw_grids(1); /* redraw grid */
|
| 676 |
#ifdef STEREO
|
| 677 |
pushright();
|
| 678 |
draw_grids(1);
|
| 679 |
smUpdate(&vwright, qlevel);
|
| 680 |
#ifdef DOBJ
|
| 681 |
dobj_render();
|
| 682 |
#endif
|
| 683 |
popright();
|
| 684 |
#endif
|
| 685 |
/* redraw mesh */
|
| 686 |
smUpdate(&odev.v, qlevel);
|
| 687 |
#ifdef DOBJ
|
| 688 |
dobj_render(); /* redraw object */
|
| 689 |
#endif
|
| 690 |
glFlush();
|
| 691 |
/* figure out good quality level */
|
| 692 |
if (!nframes++) { /* ignore first frame */
|
| 693 |
lasttime = time(0);
|
| 694 |
continue;
|
| 695 |
}
|
| 696 |
thistime = time(0);
|
| 697 |
if (thistime - lasttime >= 6 ||
|
| 698 |
nframes > (int)(3*3*TARGETFPS)) {
|
| 699 |
qlevel = thistime<=lasttime ? 3*MAXQUALITY :
|
| 700 |
(int)((double)nframes/(thistime-lasttime)
|
| 701 |
/ TARGETFPS * qlevel + 0.5);
|
| 702 |
nframes = 0;
|
| 703 |
if (qlevel >= MAXQUALITY) {
|
| 704 |
if (qlevel >= 3*MAXQUALITY) { /* brakes!! */
|
| 705 |
sleep(1);
|
| 706 |
lasttime++;
|
| 707 |
}
|
| 708 |
qlevel = MAXQUALITY-1;
|
| 709 |
} else if (qlevel < 1)
|
| 710 |
qlevel = 1;
|
| 711 |
}
|
| 712 |
}
|
| 713 |
if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */
|
| 714 |
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button);
|
| 715 |
wx = levptr(XButtonReleasedEvent)->x;
|
| 716 |
wy = levptr(XButtonReleasedEvent)->y;
|
| 717 |
moveview(wx, odev.vres-1-wy, movdir, movorb);
|
| 718 |
}
|
| 719 |
}
|
| 720 |
|
| 721 |
|
| 722 |
static
|
| 723 |
setglpersp(vp) /* set perspective view in GL */
|
| 724 |
register VIEW *vp;
|
| 725 |
{
|
| 726 |
double d, xmin, xmax, ymin, ymax;
|
| 727 |
|
| 728 |
if (mindpth >= maxdpth) {
|
| 729 |
dev_zmin = 1.;
|
| 730 |
dev_zmax = 100.;
|
| 731 |
} else {
|
| 732 |
dev_zmin = 0.1*mindpth;
|
| 733 |
dev_zmax = 5.0*maxdpth;
|
| 734 |
}
|
| 735 |
if (odev.v.vfore > FTINY)
|
| 736 |
dev_zmin = odev.v.vfore;
|
| 737 |
if (odev.v.vaft > FTINY)
|
| 738 |
dev_zmax = odev.v.vaft;
|
| 739 |
if (dev_zmin*500. < dev_zmax)
|
| 740 |
dev_zmax = dev_zmin*500.;
|
| 741 |
xmax = dev_zmin * tan(PI/180./2. * odev.v.horiz);
|
| 742 |
xmin = -xmax;
|
| 743 |
d = odev.v.hoff * (xmax - xmin);
|
| 744 |
xmin += d; xmax += d;
|
| 745 |
ymax = dev_zmin * tan(PI/180./2. * odev.v.vert);
|
| 746 |
ymin = -ymax;
|
| 747 |
d = odev.v.voff * (ymax - ymin);
|
| 748 |
ymin += d; ymax += d;
|
| 749 |
/* set view matrix */
|
| 750 |
glMatrixMode(GL_PROJECTION);
|
| 751 |
glLoadIdentity();
|
| 752 |
glFrustum(xmin, xmax, ymin, ymax, dev_zmin, dev_zmax);
|
| 753 |
gluLookAt(odev.v.vp[0], odev.v.vp[1], odev.v.vp[2],
|
| 754 |
odev.v.vp[0] + odev.v.vdir[0],
|
| 755 |
odev.v.vp[1] + odev.v.vdir[1],
|
| 756 |
odev.v.vp[2] + odev.v.vdir[2],
|
| 757 |
odev.v.vup[0], odev.v.vup[1], odev.v.vup[2]);
|
| 758 |
checkglerr("setting perspective view");
|
| 759 |
}
|
| 760 |
|
| 761 |
|
| 762 |
static
|
| 763 |
wipeclean(tmflag) /* prepare for redraw */
|
| 764 |
int tmflag;
|
| 765 |
{
|
| 766 |
/* clear depth buffer */
|
| 767 |
#ifdef STEREO
|
| 768 |
setstereobuf(STEREO_BUFFER_RIGHT);
|
| 769 |
glClear(GL_DEPTH_BUFFER_BIT);
|
| 770 |
setstereobuf(STEREO_BUFFER_LEFT);
|
| 771 |
#endif
|
| 772 |
glClear(GL_DEPTH_BUFFER_BIT);
|
| 773 |
smClean(tmflag); /* reset drawing routines */
|
| 774 |
setglpersp(&odev.v); /* reset view & clipping planes */
|
| 775 |
}
|
| 776 |
|
| 777 |
|
| 778 |
static
|
| 779 |
getkey(ekey) /* get input key */
|
| 780 |
register XKeyPressedEvent *ekey;
|
| 781 |
{
|
| 782 |
Window rootw, childw;
|
| 783 |
int rootx, rooty, wx, wy;
|
| 784 |
unsigned int statemask;
|
| 785 |
int n;
|
| 786 |
char buf[8];
|
| 787 |
|
| 788 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL);
|
| 789 |
if (n != 1)
|
| 790 |
return;
|
| 791 |
switch (buf[0]) {
|
| 792 |
case 'h': /* turn on height motion lock */
|
| 793 |
headlocked = 1;
|
| 794 |
return;
|
| 795 |
case 'H': /* turn off height motion lock */
|
| 796 |
headlocked = 0;
|
| 797 |
return;
|
| 798 |
case 'l': /* retrieve last view */
|
| 799 |
inpresflags |= DFL(DC_LASTVIEW);
|
| 800 |
return;
|
| 801 |
case 'p': /* pause computation */
|
| 802 |
inpresflags |= DFL(DC_PAUSE);
|
| 803 |
return;
|
| 804 |
case 'v': /* spit out view */
|
| 805 |
inpresflags |= DFL(DC_GETVIEW);
|
| 806 |
return;
|
| 807 |
case 'f': /* frame view position */
|
| 808 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw,
|
| 809 |
&rootx, &rooty, &wx, &wy, &statemask))
|
| 810 |
return; /* on another screen */
|
| 811 |
sprintf(odev_args, "%.4f %.4f", (wx+.5)/odev.hres,
|
| 812 |
1.-(wy+.5)/odev.vres);
|
| 813 |
inpresflags |= DFL(DC_FOCUS);
|
| 814 |
return;
|
| 815 |
case 'F': /* unfocus */
|
| 816 |
odev_args[0] = '\0';
|
| 817 |
inpresflags |= DFL(DC_FOCUS);
|
| 818 |
return;
|
| 819 |
case '\n':
|
| 820 |
case '\r': /* resume computation */
|
| 821 |
inpresflags |= DFL(DC_RESUME);
|
| 822 |
return;
|
| 823 |
case CTRL('R'): /* redraw screen */
|
| 824 |
wipeclean(1);
|
| 825 |
return;
|
| 826 |
case CTRL('L'): /* refresh from server */
|
| 827 |
if (inpresflags & DFL(DC_REDRAW))
|
| 828 |
return;
|
| 829 |
setglpersp(&odev.v); /* reset clipping planes */
|
| 830 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
| 831 |
glDisable(GL_DEPTH_TEST); /* so grids will clear */
|
| 832 |
draw_grids(1);
|
| 833 |
#ifdef STEREO
|
| 834 |
pushright();
|
| 835 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
| 836 |
draw_grids(1);
|
| 837 |
popright();
|
| 838 |
#endif
|
| 839 |
glEnable(GL_DEPTH_TEST);
|
| 840 |
glFlush();
|
| 841 |
smInit(rsL.max_samp); /* get rid of old values */
|
| 842 |
inpresflags |= DFL(DC_REDRAW); /* resend values from server */
|
| 843 |
rayqleft = 0; /* hold off update */
|
| 844 |
return;
|
| 845 |
case 'K': /* kill rtrace process(es) */
|
| 846 |
inpresflags |= DFL(DC_KILL);
|
| 847 |
break;
|
| 848 |
case 'R': /* restart rtrace */
|
| 849 |
inpresflags |= DFL(DC_RESTART);
|
| 850 |
break;
|
| 851 |
case 'C': /* clobber holodeck */
|
| 852 |
inpresflags |= DFL(DC_CLOBBER);
|
| 853 |
break;
|
| 854 |
case 'q': /* quit the program */
|
| 855 |
inpresflags |= DFL(DC_QUIT);
|
| 856 |
return;
|
| 857 |
default:
|
| 858 |
XBell(ourdisplay, 0);
|
| 859 |
return;
|
| 860 |
}
|
| 861 |
}
|
| 862 |
|
| 863 |
|
| 864 |
static
|
| 865 |
fixwindow(eexp) /* repair damage to window */
|
| 866 |
register XExposeEvent *eexp;
|
| 867 |
{
|
| 868 |
if (odev.hres == 0 | odev.vres == 0) { /* first exposure */
|
| 869 |
resizewindow((XConfigureEvent *)eexp);
|
| 870 |
return;
|
| 871 |
}
|
| 872 |
if (eexp->count) /* wait for final exposure */
|
| 873 |
return;
|
| 874 |
wipeclean(0); /* clear depth */
|
| 875 |
}
|
| 876 |
|
| 877 |
|
| 878 |
static
|
| 879 |
resizewindow(ersz) /* resize window */
|
| 880 |
register XConfigureEvent *ersz;
|
| 881 |
{
|
| 882 |
glViewport(0, 0, ersz->width, ersz->height);
|
| 883 |
|
| 884 |
if (ersz->width == odev.hres && ersz->height == odev.vres)
|
| 885 |
return;
|
| 886 |
|
| 887 |
odev.hres = ersz->width;
|
| 888 |
odev.vres = ersz->height;
|
| 889 |
|
| 890 |
odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres);
|
| 891 |
odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres);
|
| 892 |
|
| 893 |
inpresflags |= DFL(DC_SETVIEW);
|
| 894 |
}
|
