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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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#endif
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/*
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* OpenGL GLX driver for holodeck display.
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* Based on x11 driver.
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*/
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#include "standard.h"
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#include "rhd_qtree.h"
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#include <GL/glx.h>
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#include "x11icon.h"
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#ifndef RAYQLEN
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#define RAYQLEN 50000 /* 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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#ifndef MAXCONE
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#define MAXCONE 16 /* number of different cone sizes */
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#endif
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#ifndef MAXVERT
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#define MAXVERT 64 /* maximum number of cone vertices */
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#endif
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#ifndef MINVERT
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#define MINVERT 4 /* minimum number of cone vertices */
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#endif
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#ifndef DEPTHFACT
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#define DEPTHFACT 16. /* multiplier for depth tests */
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#endif
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#define GAMMA 1.4 /* default gamma correction */
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#define MOVPCT 7 /* percent distance to move /frame */
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#define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1)
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#define MOVDEG (-5) /* degrees to orbit CW/down /frame */
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#define MOVORB(s) ((s)&ShiftMask ? 1 : (s)&ControlMask ? -1 : 0)
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#define MINWIDTH 480 /* minimum graphics window width */
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#define MINHEIGHT 400 /* minimum graphics window height */
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#define VIEWDIST 356 /* assumed viewing distance (mm) */
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#define BORWIDTH 5 /* border width */
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#define ourscreen DefaultScreen(ourdisplay)
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#define ourroot RootWindow(ourdisplay,ourscreen)
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#define ourmask (StructureNotifyMask|ExposureMask|KeyPressMask|\
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ButtonPressMask|ButtonReleaseMask)
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#define levptr(etype) ((etype *)¤tevent)
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struct driver odev; /* global device driver structure */
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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 curzmax = 1e4; /* current depth upper limit */
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static double nxtzmax = 0.; /* maximum (finite) depth so far */
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static struct {
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double rad; /* cone radius */
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int nverts; /* number of vertices */
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FVECT *va; /* allocated vertex array */
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} cone[MAXCONE]; /* precomputed cones for drawing */
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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(),
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initcones(), freecones(),
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getmove(), fixwindow(), mytmflags();
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dev_open(id) /* initialize X11 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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/* set quadtree globals */
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qtMinNodesiz = 3;
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qtDepthEps = 0.07;
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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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/* 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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DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
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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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oursizhints.min_height = MINHEIGHT;
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oursizhints.flags = PMinSize;
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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_FLAT);
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glDisable(GL_DITHER);
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glDisable(GL_CULL_FACE);
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glMatrixMode(GL_PROJECTION);
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glOrtho(0., 1., 0., 1., -.01, 1.01);
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glTranslated(0., 0., -1.01);
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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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copystruct(&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 leaf pile */
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if (!qtAllocLeaves(DisplayWidth(ourdisplay,ourscreen) *
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DisplayHeight(ourdisplay,ourscreen) * 3 /
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(qtMinNodesiz*qtMinNodesiz*2)))
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error(SYSTEM, "insufficient memory for value storage");
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odev.name = id;
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odev.ifd = ConnectionNumber(ourdisplay);
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/* initialize cone array */
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initcones();
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}
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dev_close() /* close our display and free resources */
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{
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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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qtFreeLeaves();
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tmDone(NULL);
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freecones();
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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 quadtree */
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{
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qtCompost(100);
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glClear(GL_DEPTH_BUFFER_BIT);
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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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if (nv->type == VT_PAR || /* 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->vfore > FTINY) {
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error(COMMAND, "cannot handle fore clipping");
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nv->vfore = 0.;
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return(0);
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}
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if (nv != &odev.v) {
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if (!FEQ(nv->horiz,odev.v.horiz) || /* resize window? */
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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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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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copystruct(&odev.v, nv);
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}
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if (nxtzmax > FTINY) {
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curzmax = nxtzmax;
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nxtzmax = 0.;
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}
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glClear(GL_DEPTH_BUFFER_BIT);
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qtReplant();
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return(1);
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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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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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if (n)
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return(NULL);
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hvres[0] = odev.hres; hvres[1] = odev.vres;
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return(&odev.v);
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}
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int
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dev_input() /* get X11 input */
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{
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inpresflags = 0;
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do
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getevent();
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while (XQLength(ourdisplay) > 0);
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return(inpresflags);
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}
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int
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dev_flush() /* flush output */
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{
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qtUpdate();
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glFlush();
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rayqleft = RAYQLEN;
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return(XPending(ourdisplay));
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}
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dev_cone(rgb, ip, rad) /* render a cone in view coordinates */
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BYTE rgb[3];
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FVECT ip;
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double rad;
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{
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register int ci, j;
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double apexh, basez;
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/* is window mapped? */
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if (!mapped)
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return;
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/* compute apex height (0. to 1.) */
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if (ip[2] > 1e6)
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apexh = 1. - 1./DEPTHFACT;
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else {
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if (ip[2] > nxtzmax)
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nxtzmax = ip[2];
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if (ip[2] >= curzmax)
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apexh = 1. - 1./DEPTHFACT;
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else
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apexh = 1. - ip[2]/(curzmax*DEPTHFACT);
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}
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rad *= 1.25; /* find conservative cone match */
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for (ci = 0; ci < MAXCONE-1; ci++)
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if (cone[ci].rad >= rad)
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break;
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/* draw it */
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glColor3ub(rgb[0], rgb[1], rgb[2]);
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glBegin(GL_TRIANGLE_FAN);
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glVertex3d(ip[0], ip[1], apexh); /* start with apex */
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basez = apexh*cone[ci].va[0][2]; /* base z's all the same */
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for (j = 0; j < cone[ci].nverts; j++) /* draw each face */
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glVertex3d(ip[0]+cone[ci].va[j][0], ip[1]+cone[ci].va[j][1],
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basez);
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/* connect last to first */
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glVertex3d(ip[0]+cone[ci].va[0][0], ip[1]+cone[ci].va[0][1], basez);
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glEnd(); /* all done */
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}
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static int
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mytmflags() /* figure out tone mapping flags */
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{
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extern char *progname;
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register char *cp, *tail;
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/* find basic name */
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for (cp = tail = progname; *cp; cp++)
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if (*cp == '/')
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tail = cp+1;
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for (cp = tail; *cp && *cp != '.'; cp++)
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;
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if (cp-tail == 3 && !strncmp(tail, "glx", 3))
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return(TM_F_CAMERA|TM_F_NOSTDERR);
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if (cp-tail == 4 && !strncmp(tail, "glxh", 4))
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return(TM_F_HUMAN|TM_F_NOSTDERR);
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error(USER, "illegal driver name");
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}
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static
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initcones() /* initialize cone vertices */
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{
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register int i, j;
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double minrad, d;
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if (cone[0].nverts)
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freecones();
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minrad = 2.*qtMinNodesiz/(double)(DisplayWidth(ourdisplay,ourscreen) +
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DisplayHeight(ourdisplay,ourscreen));
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for (i = 0; i < MAXCONE; i++) {
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d = (double)i/(MAXCONE-1); d *= d; /* x^2 distribution */
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cone[i].rad = minrad + (1.-minrad)*d;
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cone[i].nverts = MINVERT + 0.5 + (MAXVERT-MINVERT)*d;
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cone[i].va = (FVECT *)malloc(cone[i].nverts*sizeof(FVECT));
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if (cone[i].va == NULL)
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| 385 |
error(SYSTEM, "out of memory in initcones");
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for (j = cone[i].nverts; j--; ) {
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d = 2.*PI * (j+.5) / (cone[i].nverts);
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cone[i].va[j][0] = cos(d) * cone[i].rad;
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cone[i].va[j][1] = sin(d) * cone[i].rad;
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cone[i].va[j][2] = 1. - cone[i].rad;
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}
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}
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}
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| 394 |
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static
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freecones() /* free cone vertices */
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{
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| 399 |
register int i;
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for (i = MAXCONE; i--; )
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| 402 |
if (cone[i].nverts) {
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free((char *)cone[i].va);
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cone[i].va = NULL;
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cone[i].nverts = 0;
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}
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}
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static
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getevent() /* get next event */
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{
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XNextEvent(ourdisplay, levptr(XEvent));
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switch (levptr(XEvent)->type) {
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case ConfigureNotify:
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resizewindow(levptr(XConfigureEvent));
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break;
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case UnmapNotify:
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mapped = 0;
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break;
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case MapNotify:
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mapped = 1;
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break;
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| 424 |
case Expose:
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fixwindow(levptr(XExposeEvent));
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break;
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| 427 |
case KeyPress:
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| 428 |
getkey(levptr(XKeyPressedEvent));
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break;
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| 430 |
case ButtonPress:
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getmove(levptr(XButtonPressedEvent));
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break;
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}
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| 434 |
}
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| 435 |
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static
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draw3dline(wp) /* draw 3d line in world coordinates */
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| 439 |
register FVECT wp[2];
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| 440 |
{
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| 441 |
glVertex3d(wp[0][0], wp[0][1], wp[0][2]);
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| 442 |
glVertex3d(wp[1][0], wp[1][1], wp[1][2]);
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| 443 |
}
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| 444 |
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| 445 |
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| 446 |
static
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draw_grids() /* draw holodeck section grids */
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| 448 |
{
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| 449 |
static BYTE gridrgba[4] = {0x0, 0xff, 0xff, 0x00};
|
| 450 |
double xmin, xmax, ymin, ymax, zmin, zmax;
|
| 451 |
double d, cx, sx, crad;
|
| 452 |
FVECT vx, vy;
|
| 453 |
register int i, j;
|
| 454 |
/* can we even do it? */
|
| 455 |
if (!mapped || odev.v.type != VT_PER)
|
| 456 |
return;
|
| 457 |
/* compute view frustum */
|
| 458 |
if (normalize(odev.v.vdir) == 0.0)
|
| 459 |
return;
|
| 460 |
zmin = 0.01;
|
| 461 |
zmax = 10000.;
|
| 462 |
if (odev.v.vfore > FTINY)
|
| 463 |
zmin = odev.v.vfore;
|
| 464 |
if (odev.v.vaft > FTINY)
|
| 465 |
zmax = odev.v.vaft;
|
| 466 |
xmax = zmin * tan(PI/180./2. * odev.v.horiz);
|
| 467 |
xmin = -xmax;
|
| 468 |
d = odev.v.hoff * (xmax - xmin);
|
| 469 |
xmin += d; xmax += d;
|
| 470 |
ymax = zmin * tan(PI/180./2. * odev.v.vert);
|
| 471 |
ymin = -ymax;
|
| 472 |
d = odev.v.voff * (ymax - ymin);
|
| 473 |
ymin += d; ymax += d;
|
| 474 |
/* set view matrix */
|
| 475 |
glMatrixMode(GL_PROJECTION);
|
| 476 |
glPushMatrix();
|
| 477 |
glLoadIdentity();
|
| 478 |
glFrustum(xmin, xmax, ymin, ymax, zmin, zmax);
|
| 479 |
gluLookAt(odev.v.vp[0], odev.v.vp[1], odev.v.vp[2],
|
| 480 |
odev.v.vp[0] + odev.v.vdir[0],
|
| 481 |
odev.v.vp[1] + odev.v.vdir[1],
|
| 482 |
odev.v.vp[2] + odev.v.vdir[2],
|
| 483 |
odev.v.vup[0], odev.v.vup[1], odev.v.vup[2]);
|
| 484 |
glDisable(GL_DEPTH_TEST); /* write no depth values */
|
| 485 |
glColor4ub(gridrgba[0], gridrgba[1], gridrgba[2], gridrgba[3]);
|
| 486 |
glBegin(GL_LINES); /* draw each grid line */
|
| 487 |
gridlines(draw3dline);
|
| 488 |
glEnd();
|
| 489 |
glEnable(GL_DEPTH_TEST); /* restore rendering params */
|
| 490 |
glPopMatrix();
|
| 491 |
}
|
| 492 |
|
| 493 |
|
| 494 |
static
|
| 495 |
moveview(dx, dy, mov, orb) /* move our view */
|
| 496 |
int dx, dy, mov, orb;
|
| 497 |
{
|
| 498 |
VIEW nv;
|
| 499 |
FVECT odir, v1;
|
| 500 |
double d;
|
| 501 |
register int li;
|
| 502 |
/* start with old view */
|
| 503 |
copystruct(&nv, &odev.v);
|
| 504 |
/* change view direction */
|
| 505 |
if (mov | orb) {
|
| 506 |
if ((li = qtFindLeaf(dx, dy)) < 0)
|
| 507 |
return(0); /* not on window */
|
| 508 |
VSUM(odir, qtL.wp[li], nv.vp, -1.);
|
| 509 |
} else {
|
| 510 |
if (viewray(nv.vp, nv.vdir, &odev.v,
|
| 511 |
(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY)
|
| 512 |
return(0); /* outside view */
|
| 513 |
}
|
| 514 |
if (orb && mov) { /* orbit left/right */
|
| 515 |
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov);
|
| 516 |
VSUM(nv.vp, qtL.wp[li], odir, -1.);
|
| 517 |
spinvector(nv.vdir, nv.vdir, nv.vup, d);
|
| 518 |
} else if (orb) { /* orbit up/down */
|
| 519 |
fcross(v1, odir, nv.vup);
|
| 520 |
if (normalize(v1) == 0.)
|
| 521 |
return(0);
|
| 522 |
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb);
|
| 523 |
VSUM(nv.vp, qtL.wp[li], odir, -1.);
|
| 524 |
spinvector(nv.vdir, nv.vdir, v1, d);
|
| 525 |
} else if (mov) { /* move forward/backward */
|
| 526 |
d = MOVPCT/100. * mov;
|
| 527 |
VSUM(nv.vp, nv.vp, odir, d);
|
| 528 |
}
|
| 529 |
if (!mov ^ !orb && headlocked) { /* restore head height */
|
| 530 |
VSUM(v1, odev.v.vp, nv.vp, -1.);
|
| 531 |
d = DOT(v1, odev.v.vup);
|
| 532 |
VSUM(nv.vp, nv.vp, odev.v.vup, d);
|
| 533 |
}
|
| 534 |
if (setview(&nv) != NULL)
|
| 535 |
return(0); /* illegal view */
|
| 536 |
dev_view(&nv);
|
| 537 |
inpresflags |= DFL(DC_SETVIEW);
|
| 538 |
return(1);
|
| 539 |
}
|
| 540 |
|
| 541 |
|
| 542 |
static
|
| 543 |
getmove(ebut) /* get view change */
|
| 544 |
XButtonPressedEvent *ebut;
|
| 545 |
{
|
| 546 |
int movdir = MOVDIR(ebut->button);
|
| 547 |
int movorb = MOVORB(ebut->state);
|
| 548 |
int oldnodesiz = qtMinNodesiz;
|
| 549 |
Window rootw, childw;
|
| 550 |
int rootx, rooty, wx, wy;
|
| 551 |
unsigned int statemask;
|
| 552 |
|
| 553 |
qtMinNodesiz = 24; /* accelerate update rate */
|
| 554 |
XNoOp(ourdisplay);
|
| 555 |
|
| 556 |
while (!XCheckMaskEvent(ourdisplay,
|
| 557 |
ButtonReleaseMask, levptr(XEvent))) {
|
| 558 |
|
| 559 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw,
|
| 560 |
&rootx, &rooty, &wx, &wy, &statemask))
|
| 561 |
break; /* on another screen */
|
| 562 |
|
| 563 |
if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) {
|
| 564 |
sleep(1);
|
| 565 |
continue;
|
| 566 |
}
|
| 567 |
glClear(GL_COLOR_BUFFER_BIT);
|
| 568 |
qtUpdate();
|
| 569 |
draw_grids();
|
| 570 |
glFlush();
|
| 571 |
}
|
| 572 |
if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */
|
| 573 |
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button);
|
| 574 |
wx = levptr(XButtonReleasedEvent)->x;
|
| 575 |
wy = levptr(XButtonReleasedEvent)->y;
|
| 576 |
moveview(wx, odev.vres-1-wy, movdir, movorb);
|
| 577 |
}
|
| 578 |
dev_flush();
|
| 579 |
|
| 580 |
qtMinNodesiz = oldnodesiz; /* restore quadtree resolution */
|
| 581 |
}
|
| 582 |
|
| 583 |
|
| 584 |
static
|
| 585 |
getkey(ekey) /* get input key */
|
| 586 |
register XKeyPressedEvent *ekey;
|
| 587 |
{
|
| 588 |
int n;
|
| 589 |
char buf[8];
|
| 590 |
|
| 591 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL);
|
| 592 |
if (n != 1)
|
| 593 |
return;
|
| 594 |
switch (buf[0]) {
|
| 595 |
case 'h': /* turn on height motion lock */
|
| 596 |
headlocked = 1;
|
| 597 |
return;
|
| 598 |
case 'H': /* turn off height motion lock */
|
| 599 |
headlocked = 0;
|
| 600 |
return;
|
| 601 |
case 'l': /* retrieve last view */
|
| 602 |
inpresflags |= DFL(DC_LASTVIEW);
|
| 603 |
return;
|
| 604 |
case 'p': /* pause computation */
|
| 605 |
inpresflags |= DFL(DC_PAUSE);
|
| 606 |
return;
|
| 607 |
case 'v': /* spit out view */
|
| 608 |
inpresflags |= DFL(DC_GETVIEW);
|
| 609 |
return;
|
| 610 |
case '\n':
|
| 611 |
case '\r': /* resume computation */
|
| 612 |
inpresflags |= DFL(DC_RESUME);
|
| 613 |
return;
|
| 614 |
case CTRL('R'): /* redraw screen */
|
| 615 |
if (nxtzmax > FTINY) {
|
| 616 |
curzmax = nxtzmax;
|
| 617 |
nxtzmax = 0.;
|
| 618 |
}
|
| 619 |
glClear(GL_DEPTH_BUFFER_BIT);
|
| 620 |
qtRedraw(0, 0, odev.hres, odev.vres);
|
| 621 |
return;
|
| 622 |
case CTRL('L'): /* refresh from server */
|
| 623 |
if (inpresflags & DFL(DC_REDRAW))
|
| 624 |
return;
|
| 625 |
if (nxtzmax > FTINY) {
|
| 626 |
curzmax = nxtzmax;
|
| 627 |
nxtzmax = 0.;
|
| 628 |
}
|
| 629 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
| 630 |
draw_grids();
|
| 631 |
glFlush();
|
| 632 |
qtCompost(100); /* get rid of old values */
|
| 633 |
inpresflags |= DFL(DC_REDRAW); /* resend values from server */
|
| 634 |
rayqleft = 0; /* hold off update */
|
| 635 |
return;
|
| 636 |
case 'K': /* kill rtrace process(es) */
|
| 637 |
inpresflags |= DFL(DC_KILL);
|
| 638 |
break;
|
| 639 |
case 'R': /* restart rtrace */
|
| 640 |
inpresflags |= DFL(DC_RESTART);
|
| 641 |
break;
|
| 642 |
case 'C': /* clobber holodeck */
|
| 643 |
inpresflags |= DFL(DC_CLOBBER);
|
| 644 |
break;
|
| 645 |
case 'q': /* quit the program */
|
| 646 |
inpresflags |= DFL(DC_QUIT);
|
| 647 |
return;
|
| 648 |
default:
|
| 649 |
XBell(ourdisplay, 0);
|
| 650 |
return;
|
| 651 |
}
|
| 652 |
}
|
| 653 |
|
| 654 |
|
| 655 |
static
|
| 656 |
fixwindow(eexp) /* repair damage to window */
|
| 657 |
register XExposeEvent *eexp;
|
| 658 |
{
|
| 659 |
int xmin, xmax, ymin, ymax;
|
| 660 |
|
| 661 |
if (odev.hres == 0 || odev.vres == 0) /* first exposure */
|
| 662 |
resizewindow((XConfigureEvent *)eexp);
|
| 663 |
xmin = eexp->x; xmax = eexp->x + eexp->width;
|
| 664 |
ymin = odev.vres - eexp->y - eexp->height; ymax = odev.vres - eexp->y;
|
| 665 |
/* clear portion of depth */
|
| 666 |
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
|
| 667 |
glDepthFunc(GL_ALWAYS);
|
| 668 |
glBegin(GL_POLYGON);
|
| 669 |
glVertex3d((double)xmin/odev.hres, (double)ymin/odev.vres, 0.);
|
| 670 |
glVertex3d((double)xmax/odev.hres, (double)ymin/odev.vres, 0.);
|
| 671 |
glVertex3d((double)xmax/odev.hres, (double)ymax/odev.vres, 0.);
|
| 672 |
glVertex3d((double)xmin/odev.hres, (double)ymax/odev.vres, 0.);
|
| 673 |
glEnd();
|
| 674 |
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
|
| 675 |
glDepthFunc(GL_LEQUAL);
|
| 676 |
qtRedraw(xmin, ymin, xmax, ymax);
|
| 677 |
}
|
| 678 |
|
| 679 |
|
| 680 |
static
|
| 681 |
resizewindow(ersz) /* resize window */
|
| 682 |
register XConfigureEvent *ersz;
|
| 683 |
{
|
| 684 |
glViewport(0, 0, ersz->width, ersz->height);
|
| 685 |
|
| 686 |
if (ersz->width == odev.hres && ersz->height == odev.vres)
|
| 687 |
return;
|
| 688 |
|
| 689 |
odev.hres = ersz->width;
|
| 690 |
odev.vres = ersz->height;
|
| 691 |
|
| 692 |
odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres);
|
| 693 |
odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres);
|
| 694 |
|
| 695 |
inpresflags |= DFL(DC_SETVIEW);
|
| 696 |
}
|
