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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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|
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#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ SGI"; |
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#endif |
| 6 |
|
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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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|
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#include "standard.h" |
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#include "rhd_qtree.h" |
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|
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#include <GL/glx.h> |
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|
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#include "x11icon.h" |
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|
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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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|
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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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|
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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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|
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#define GAMMA 1.4 /* default gamma correction */ |
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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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#define MINWIDTH 480 /* minimum graphics window width */ |
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#define MINHEIGHT 400 /* minimum graphics window height */ |
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|
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#define VIEWDIST 356 /* assumed viewing distance (mm) */ |
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|
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#define BORWIDTH 5 /* border width */ |
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|
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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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|
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#define levptr(etype) ((etype *)¤tevent) |
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|
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struct driver odev; /* global device driver structure */ |
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|
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static XEvent currentevent; /* current event */ |
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|
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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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|
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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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|
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static double pwidth, pheight; /* pixel dimensions (mm) */ |
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|
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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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|
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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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|
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static int inpresflags; /* input result flags */ |
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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(), |
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initcones(), freecones(), |
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getmove(), fixwindow(), mytmflags(); |
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|
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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do |
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getevent(); |
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|
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while (XQLength(ourdisplay) > 0); |
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|
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return(inpresflags); |
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} |
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|
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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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|
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|
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dev_cone(rgb, ip, rad) /* render a cone in view coordinates */ |
| 312 |
BYTE rgb[3]; |
| 313 |
FVECT ip; |
| 314 |
double rad; |
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{ |
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register int ci, j; |
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double apexh, basez; |
| 318 |
/* is window mapped? */ |
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if (!mapped) |
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return; |
| 321 |
/* compute apex height (0. to 1.) */ |
| 322 |
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); |
| 331 |
} |
| 332 |
rad *= 1.25; /* find conservative cone match */ |
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for (ci = 0; ci < MAXCONE-1; ci++) |
| 334 |
if (cone[ci].rad >= rad) |
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break; |
| 336 |
/* draw it */ |
| 337 |
glColor3ub(rgb[0], rgb[1], rgb[2]); |
| 338 |
glBegin(GL_TRIANGLE_FAN); |
| 339 |
glVertex3d(ip[0], ip[1], apexh); /* start with apex */ |
| 340 |
basez = apexh*cone[ci].va[0][2]; /* base z's all the same */ |
| 341 |
for (j = 0; j < cone[ci].nverts; j++) /* draw each face */ |
| 342 |
glVertex3d(ip[0]+cone[ci].va[j][0], ip[1]+cone[ci].va[j][1], |
| 343 |
basez); |
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/* connect last to first */ |
| 345 |
glVertex3d(ip[0]+cone[ci].va[0][0], ip[1]+cone[ci].va[0][1], basez); |
| 346 |
glEnd(); /* all done */ |
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} |
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|
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|
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static int |
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mytmflags() /* figure out tone mapping flags */ |
| 352 |
{ |
| 353 |
extern char *progname; |
| 354 |
register char *cp, *tail; |
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/* find basic name */ |
| 356 |
for (cp = tail = progname; *cp; cp++) |
| 357 |
if (*cp == '/') |
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tail = cp+1; |
| 359 |
for (cp = tail; *cp && *cp != '.'; cp++) |
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; |
| 361 |
if (cp-tail == 3 && !strncmp(tail, "glx", 3)) |
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return(TM_F_CAMERA|TM_F_NOSTDERR); |
| 363 |
if (cp-tail == 4 && !strncmp(tail, "glxh", 4)) |
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return(TM_F_HUMAN|TM_F_NOSTDERR); |
| 365 |
error(USER, "illegal driver name"); |
| 366 |
} |
| 367 |
|
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|
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static |
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initcones() /* initialize cone vertices */ |
| 371 |
{ |
| 372 |
register int i, j; |
| 373 |
double minrad, d; |
| 374 |
|
| 375 |
if (cone[0].nverts) |
| 376 |
freecones(); |
| 377 |
minrad = 2.*qtMinNodesiz/(double)(DisplayWidth(ourdisplay,ourscreen) + |
| 378 |
DisplayHeight(ourdisplay,ourscreen)); |
| 379 |
for (i = 0; i < MAXCONE; i++) { |
| 380 |
d = (double)i/(MAXCONE-1); d *= d; /* x^2 distribution */ |
| 381 |
cone[i].rad = minrad + (1.-minrad)*d; |
| 382 |
cone[i].nverts = MINVERT + 0.5 + (MAXVERT-MINVERT)*d; |
| 383 |
cone[i].va = (FVECT *)malloc(cone[i].nverts*sizeof(FVECT)); |
| 384 |
if (cone[i].va == NULL) |
| 385 |
error(SYSTEM, "out of memory in initcones"); |
| 386 |
for (j = cone[i].nverts; j--; ) { |
| 387 |
d = 2.*PI * (j+.5) / (cone[i].nverts); |
| 388 |
cone[i].va[j][0] = cos(d) * cone[i].rad; |
| 389 |
cone[i].va[j][1] = sin(d) * cone[i].rad; |
| 390 |
cone[i].va[j][2] = 1. - cone[i].rad; |
| 391 |
} |
| 392 |
} |
| 393 |
} |
| 394 |
|
| 395 |
|
| 396 |
static |
| 397 |
freecones() /* free cone vertices */ |
| 398 |
{ |
| 399 |
register int i; |
| 400 |
|
| 401 |
for (i = MAXCONE; i--; ) |
| 402 |
if (cone[i].nverts) { |
| 403 |
free((char *)cone[i].va); |
| 404 |
cone[i].va = NULL; |
| 405 |
cone[i].nverts = 0; |
| 406 |
} |
| 407 |
} |
| 408 |
|
| 409 |
|
| 410 |
static |
| 411 |
getevent() /* get next event */ |
| 412 |
{ |
| 413 |
XNextEvent(ourdisplay, levptr(XEvent)); |
| 414 |
switch (levptr(XEvent)->type) { |
| 415 |
case ConfigureNotify: |
| 416 |
resizewindow(levptr(XConfigureEvent)); |
| 417 |
break; |
| 418 |
case UnmapNotify: |
| 419 |
mapped = 0; |
| 420 |
break; |
| 421 |
case MapNotify: |
| 422 |
mapped = 1; |
| 423 |
break; |
| 424 |
case Expose: |
| 425 |
fixwindow(levptr(XExposeEvent)); |
| 426 |
break; |
| 427 |
case KeyPress: |
| 428 |
getkey(levptr(XKeyPressedEvent)); |
| 429 |
break; |
| 430 |
case ButtonPress: |
| 431 |
getmove(levptr(XButtonPressedEvent)); |
| 432 |
break; |
| 433 |
} |
| 434 |
} |
| 435 |
|
| 436 |
|
| 437 |
static |
| 438 |
draw3dline(wp) /* draw 3d line in world coordinates */ |
| 439 |
register FVECT wp[2]; |
| 440 |
{ |
| 441 |
glVertex3d(wp[0][0], wp[0][1], wp[0][2]); |
| 442 |
glVertex3d(wp[1][0], wp[1][1], wp[1][2]); |
| 443 |
} |
| 444 |
|
| 445 |
|
| 446 |
static |
| 447 |
draw_grids() /* draw holodeck section grids */ |
| 448 |
{ |
| 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 |
} |
