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gregl |
3.1 |
/* Copyright (c) 1997 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 rview driver. |
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*/ |
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#include "standard.h" |
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#include "tonemap.h" |
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#include "rhdriver.h" |
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#include <GL/glx.h> |
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#include "x11icon.h" |
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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 int4 |
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#define int4 int |
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#endif |
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#ifndef FREEPCT |
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#define FREEPCT 25 /* percentage of values to free */ |
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#endif |
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#ifndef NCONEV |
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#define NCONEV 7 /* number of cone base vertices */ |
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#endif |
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#ifndef CONEH |
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#define CONEH 0.25 /* cone height (fraction of depth) */ |
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#endif |
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#ifndef CONEW |
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#define CONEW 0.035 /* cone width (fraction of screen) */ |
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#endif |
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#define GAMMA 2.2 /* 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 *pixval = NULL; /* allocated pixels */ |
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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 mindepth = FHUGE; /* minimum depth value so far */ |
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static double maxdepth = 0.; /* maximum depth value */ |
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static double pwidth, pheight; /* pixel dimensions (mm) */ |
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static FVECT conev[NCONEV]; /* drawing cone */ |
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static double coneh; /* cone height */ |
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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 struct { |
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float (*wp)[3]; /* world intersection point array */ |
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int4 *wd; /* world direction array */ |
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TMbright *brt; /* encoded brightness array */ |
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BYTE (*chr)[3]; /* encoded chrominance array */ |
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BYTE (*rgb)[3]; /* tone-mapped color array */ |
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BYTE *alpha; /* alpha values */ |
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int nl; /* count of values */ |
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int bl, tl; /* bottom and top (next) value index */ |
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int tml; /* next value needing tone-mapping */ |
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int drl; /* next value in need of drawing */ |
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char *base; /* base of allocated memory */ |
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} rV; /* our collection of values */ |
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#define redraw() (rV.drl = rV.bl) |
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static int resizewindow(), getevent(), getkey(), moveview(), |
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setGLview(), getmove(), fixwindow(), mytmflags(), |
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newvalue(), drawvalue(), Compost(), |
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FindValue(), AllocValues(), TMapValues(), FreeValues(); |
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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 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_ALPHA_SIZE,8, GLX_DEPTH_SIZE,23, |
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/*GLX_DOUBLEBUFFER,*/ None}; |
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static int atlOK[] = {GLX_RGBA, GLX_RED_SIZE,4, |
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GLX_GREEN_SIZE,4, GLX_BLUE_SIZE,4, |
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GLX_ALPHA_SIZE,4, GLX_DEPTH_SIZE,15, |
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/*GLX_DOUBLEBUFFER,*/ None}; |
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char *gv; |
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double gamval = GAMMA; |
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XSetWindowAttributes ourwinattr; |
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XWMHints ourxwmhints; |
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XSizeHints oursizhints; |
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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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ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlOK); |
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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 ((gv = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL |
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|| (gv = getenv("DISPLAY_GAMMA")) != NULL) |
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gamval = atof(gv); |
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if (tmInit(mytmflags(), stdprims, 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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/* map the window and get its size */ |
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XMapWindow(ourdisplay, gwind); |
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dev_input(); |
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/* allocate our value list */ |
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if (!AllocValues(DisplayWidth(ourdisplay,ourscreen) * |
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DisplayHeight(ourdisplay,ourscreen) / 4)) |
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error(SYSTEM, "insufficient memory for value storage"); |
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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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odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres); |
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odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres); |
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odev.name = id; |
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odev.ifd = ConnectionNumber(ourdisplay); |
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/* set GLX context and clear buffers */ |
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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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glDrawBuffer(GL_FRONT_AND_BACK); |
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glReadBuffer(GL_BACK); |
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
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setGLview(); /* initialize view */ |
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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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tmDone(NULL); |
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FreeValues(); |
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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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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_PER || /* check view legality */ |
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nv->horiz > 120. || nv->vert > 120.) { |
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error(COMMAND, "illegal view type/angle"); |
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nv->type = VT_PER; |
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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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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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} |
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copystruct(&odev.v, nv); |
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setGLview(); |
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} |
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
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redraw(); |
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return(1); |
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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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dev_value(c, p, v) /* add a pixel value to our list */ |
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COLR c; |
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FVECT p, v; |
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{ |
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register int li; |
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li = newvalue(); |
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VCOPY(rV.wp[li], p); |
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rV.wd[li] = encodedir(v); |
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tmCvColrs(&rV.brt[li], rV.chr[li], c, 1); |
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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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if (mapped) { |
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TMapValues(0); |
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while (rV.drl != rV.tl) { |
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drawvalue(rV.drl); |
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if (++rV.drl >= rV.nl) |
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rV.drl = 0; |
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} |
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glFlush(); |
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} |
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return(XPending(ourdisplay)); |
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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); |
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if (cp-tail == 4 && !strncmp(tail, "glxh", 4)) |
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return(TM_F_HUMAN); |
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error(USER, "illegal driver name"); |
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} |
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static |
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setGLview() /* set our GL view */ |
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{ |
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double xmin, xmax, ymin, ymax, zmin, zmax; |
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double d, cx, sx, crad; |
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FVECT vx, vy; |
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register int i, j; |
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/* compute view frustum */ |
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if (normalize(odev.v.vdir) == 0.0) |
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return; |
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if (mindepth < maxdepth) { |
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zmin = 0.25*mindepth; |
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zmax = 8.0*maxdepth; |
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} else { |
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zmin = 0.01; |
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zmax = 1000.; |
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} |
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if (odev.v.vfore > FTINY) |
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zmin = odev.v.vfore; |
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if (odev.v.vaft > FTINY) |
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zmax = odev.v.vaft; |
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xmax = zmin * tan(PI/180./2. * odev.v.horiz); |
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xmin = -xmax; |
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d = odev.v.hoff * (xmax - xmin); |
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xmin += d; xmax += d; |
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ymax = zmin * tan(PI/180./2. * odev.v.vert); |
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ymin = -ymax; |
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d = odev.v.voff * (ymax - ymin); |
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ymin += d; ymax += d; |
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/* set view matrix */ |
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glMatrixMode(GL_PROJECTION); |
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glLoadIdentity(); |
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glFrustum(xmin, xmax, ymin, ymax, zmin, zmax); |
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gluLookAt(odev.v.vp[0], odev.v.vp[1], odev.v.vp[2], |
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odev.v.vp[0] + odev.v.vdir[0], |
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odev.v.vp[1] + odev.v.vdir[1], |
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odev.v.vp[2] + odev.v.vdir[2], |
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odev.v.vup[0], odev.v.vup[1], odev.v.vup[2]); |
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/* set viewport */ |
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glViewport(0, 0, odev.hres, odev.vres); |
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/* initialize cone for Vornoi polys */ |
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coneh = CONEH*(zmax - zmin); |
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crad = 0.5 * CONEW * 0.5*(xmax-xmin + ymax-ymin) * (zmin+coneh)/zmin; |
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vy[0] = vy[1] = vy[2] = 0.; |
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for (i = 0; i < 3; i++) |
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|
|
if (odev.v.vdir[i] < 0.6 && odev.v.vdir[i] > -0.6) |
368 |
|
|
break; |
369 |
|
|
vy[i] = 1.; |
370 |
|
|
fcross(vx, vy, odev.v.vdir); |
371 |
|
|
normalize(vx); |
372 |
|
|
fcross(vy, odev.v.vdir, vx); |
373 |
|
|
for (j = 0, d = 0.; j < NCONEV; j++, d += 2.*PI/NCONEV) { |
374 |
|
|
cx = crad*cos(d); sx = crad*sin(d); |
375 |
|
|
for (i = 0; i < 3; i++) |
376 |
|
|
conev[j][i] = coneh*odev.v.vdir[i] + |
377 |
|
|
cx*vx[i] + sx*vy[i]; |
378 |
|
|
} |
379 |
|
|
} |
380 |
|
|
|
381 |
|
|
|
382 |
|
|
static int |
383 |
|
|
newvalue() /* allocate a leaf from our pile */ |
384 |
|
|
{ |
385 |
|
|
int li; |
386 |
|
|
|
387 |
|
|
li = rV.tl++; |
388 |
|
|
if (rV.tl >= rV.nl) /* get next leaf in ring */ |
389 |
|
|
rV.tl = 0; |
390 |
|
|
if (rV.tl == rV.bl) /* need to shake some free */ |
391 |
|
|
Compost(FREEPCT); |
392 |
|
|
return(li); |
393 |
|
|
} |
394 |
|
|
|
395 |
|
|
|
396 |
|
|
static |
397 |
|
|
drawvalue(li) /* draw a pixel value as a cone */ |
398 |
|
|
register int li; |
399 |
|
|
{ |
400 |
|
|
static FVECT apex, disp; |
401 |
|
|
double d, h, v; |
402 |
|
|
register int i; |
403 |
|
|
/* compute cone's base displacement */ |
404 |
|
|
VCOPY(apex, rV.wp[li]); |
405 |
|
|
disp[0] = apex[0] - odev.v.vp[0]; |
406 |
|
|
disp[1] = apex[1] - odev.v.vp[1]; |
407 |
|
|
disp[2] = apex[2] - odev.v.vp[2]; |
408 |
|
|
if ((d = DOT(disp,odev.v.vdir)) <= odev.v.vfore || d <= FTINY) |
409 |
|
|
return; |
410 |
|
|
if (d > 1e5) { /* background region */ |
411 |
|
|
if (odev.v.vaft > FTINY) |
412 |
|
|
return; |
413 |
|
|
h = maxdepth/d; |
414 |
|
|
disp[0] *= h; disp[1] *= h; disp[2] *= h; |
415 |
|
|
apex[0] = odev.v.vp[0] + disp[0]; |
416 |
|
|
apex[1] = odev.v.vp[1] + disp[1]; |
417 |
|
|
apex[2] = odev.v.vp[2] + disp[2]; |
418 |
|
|
d = maxdepth; |
419 |
|
|
} else if (d > maxdepth) |
420 |
|
|
maxdepth = d; |
421 |
|
|
h = DOT(disp,odev.v.hvec)/(d*odev.v.hn2); |
422 |
|
|
v = DOT(disp,odev.v.vvec)/(d*odev.v.vn2); |
423 |
|
|
if (fabs(h - odev.v.hoff) < 0.5 && fabs(v - odev.v.voff) < 0.5 && |
424 |
|
|
d < mindepth) |
425 |
|
|
{ |
426 |
|
|
fprintf(stderr, "min depth now %lf (%lf,%lf,%lf)\n", d, apex[0], apex[1], apex[2]); |
427 |
|
|
mindepth = d; |
428 |
|
|
} |
429 |
|
|
for (i = 0; i < 3; i++) |
430 |
|
|
disp[i] = apex[i] + coneh*(h*odev.v.hvec[i] + v*odev.v.vvec[i]); |
431 |
|
|
/* draw pyramid (cone approx.) */ |
432 |
|
|
glColor4ub(rV.rgb[li][0], rV.rgb[li][1], rV.rgb[li][2], rV.alpha[li]); |
433 |
|
|
glBegin(GL_TRIANGLE_FAN); |
434 |
|
|
glVertex3f(apex[0], apex[1], apex[2]); |
435 |
|
|
for (i = 0; i < NCONEV; i++) |
436 |
|
|
glVertex3d(conev[i][0] + disp[0], conev[i][1] + disp[1], |
437 |
|
|
conev[i][2] + disp[2]); |
438 |
|
|
/* connect last side to first */ |
439 |
|
|
glVertex3d(conev[0][0] + disp[0], conev[0][1] + disp[1], |
440 |
|
|
conev[0][2] + disp[2]); |
441 |
|
|
glEnd(); /* done */ |
442 |
|
|
} |
443 |
|
|
|
444 |
|
|
|
445 |
|
|
#define LEAFSIZ (3*sizeof(float)+sizeof(int4)+\ |
446 |
|
|
sizeof(TMbright)+7*sizeof(BYTE)) |
447 |
|
|
|
448 |
|
|
static |
449 |
|
|
AllocValues(n) /* allocate space for n values */ |
450 |
|
|
register int n; |
451 |
|
|
{ |
452 |
|
|
unsigned nbytes; |
453 |
|
|
register unsigned i; |
454 |
|
|
|
455 |
|
|
if (n <= 0) |
456 |
|
|
return(0); |
457 |
|
|
if (rV.nl >= n) |
458 |
|
|
return(rV.nl); |
459 |
|
|
else if (rV.nl > 0) |
460 |
|
|
free(rV.base); |
461 |
|
|
/* round space up to nearest power of 2 */ |
462 |
|
|
nbytes = n*LEAFSIZ + 8; |
463 |
|
|
for (i = 1024; nbytes > i; i <<= 1) |
464 |
|
|
; |
465 |
|
|
n = (i - 8) / LEAFSIZ; /* should we make sure n is even? */ |
466 |
|
|
rV.base = (char *)malloc(n*LEAFSIZ); |
467 |
|
|
if (rV.base == NULL) |
468 |
|
|
return(0); |
469 |
|
|
/* assign larger alignment types earlier */ |
470 |
|
|
rV.wp = (float (*)[3])rV.base; |
471 |
|
|
rV.wd = (int4 *)(rV.wp + n); |
472 |
|
|
rV.brt = (TMbright *)(rV.wd + n); |
473 |
|
|
rV.chr = (BYTE (*)[3])(rV.brt + n); |
474 |
|
|
rV.rgb = (BYTE (*)[3])(rV.chr + n); |
475 |
|
|
rV.alpha = (BYTE *)(rV.rgb + n); |
476 |
|
|
rV.nl = n; |
477 |
|
|
rV.drl = rV.tml = rV.bl = rV.tl = 0; |
478 |
|
|
return(n); |
479 |
|
|
} |
480 |
|
|
|
481 |
|
|
#undef LEAFSIZ |
482 |
|
|
|
483 |
|
|
|
484 |
|
|
static |
485 |
|
|
FreeValues() /* free our allocated values */ |
486 |
|
|
{ |
487 |
|
|
if (rV.nl <= 0) |
488 |
|
|
return; |
489 |
|
|
free(rV.base); |
490 |
|
|
rV.base = NULL; |
491 |
|
|
rV.nl = 0; |
492 |
|
|
} |
493 |
|
|
|
494 |
|
|
|
495 |
|
|
static |
496 |
|
|
TMapValues(redo) /* map our values to RGB */ |
497 |
|
|
int redo; |
498 |
|
|
{ |
499 |
|
|
int aorg, alen, borg, blen; |
500 |
|
|
/* recompute mapping? */ |
501 |
|
|
if (redo) |
502 |
|
|
rV.tml = rV.bl; |
503 |
|
|
/* already done? */ |
504 |
|
|
if (rV.tml == rV.tl) |
505 |
|
|
return(1); |
506 |
|
|
/* compute segments */ |
507 |
|
|
aorg = rV.tml; |
508 |
|
|
if (rV.tl >= aorg) { |
509 |
|
|
alen = rV.tl - aorg; |
510 |
|
|
blen = 0; |
511 |
|
|
} else { |
512 |
|
|
alen = rV.nl - aorg; |
513 |
|
|
borg = 0; |
514 |
|
|
blen = rV.tl; |
515 |
|
|
} |
516 |
|
|
/* (re)compute tone mapping? */ |
517 |
|
|
if (rV.tml == rV.bl) { |
518 |
|
|
tmClearHisto(); |
519 |
|
|
tmAddHisto(rV.brt+aorg, alen, 1); |
520 |
|
|
if (blen > 0) |
521 |
|
|
tmAddHisto(rV.brt+borg, blen, 1); |
522 |
|
|
if (tmComputeMapping(0., 0., 0.) != TM_E_OK) |
523 |
|
|
return(0); |
524 |
|
|
rV.drl = rV.bl; |
525 |
|
|
} |
526 |
|
|
if (tmMapPixels(rV.rgb+aorg, rV.brt+aorg, |
527 |
|
|
rV.chr+aorg, alen) != TM_E_OK) |
528 |
|
|
return(0); |
529 |
|
|
if (blen > 0) |
530 |
|
|
tmMapPixels(rV.rgb+borg, rV.brt+borg, |
531 |
|
|
rV.chr+borg, blen); |
532 |
|
|
/* compute unique alpha values */ |
533 |
|
|
rV.tml = rV.tl; |
534 |
|
|
return(1); |
535 |
|
|
} |
536 |
|
|
|
537 |
|
|
|
538 |
|
|
static int |
539 |
|
|
Compost(pct) /* free up some values */ |
540 |
|
|
int pct; |
541 |
|
|
{ |
542 |
|
|
int nused, nclear, nmapped, ndrawn; |
543 |
|
|
/* figure out how many values to clear */ |
544 |
|
|
nclear = rV.nl * pct / 100; |
545 |
|
|
nused = rV.tl - rV.bl; |
546 |
|
|
if (nused <= 0) nused += rV.nl; |
547 |
|
|
nclear -= rV.nl - nused; |
548 |
|
|
if (nclear <= 0) |
549 |
|
|
return(0); |
550 |
|
|
if (nclear >= nused) { /* clear them all */ |
551 |
|
|
rV.drl = rV.tml = rV.bl = rV.tl = 0; |
552 |
|
|
return(nused); |
553 |
|
|
} |
554 |
|
|
/* else clear values from bottom */ |
555 |
|
|
ndrawn = rV.drl - rV.bl; |
556 |
|
|
if (ndrawn < 0) ndrawn += rV.nl; |
557 |
|
|
nmapped = rV.tml - rV.bl; |
558 |
|
|
if (nmapped < 0) nmapped += rV.nl; |
559 |
|
|
rV.bl += nclear; |
560 |
|
|
if (rV.bl >= rV.nl) rV.bl -= rV.nl; |
561 |
|
|
if (ndrawn < nclear) rV.drl = rV.bl; |
562 |
|
|
if (nmapped < nclear) rV.tml = rV.bl; |
563 |
|
|
return(nclear); |
564 |
|
|
} |
565 |
|
|
|
566 |
|
|
|
567 |
|
|
static |
568 |
|
|
getevent() /* get next event */ |
569 |
|
|
{ |
570 |
|
|
XNextEvent(ourdisplay, levptr(XEvent)); |
571 |
|
|
switch (levptr(XEvent)->type) { |
572 |
|
|
case ConfigureNotify: |
573 |
|
|
resizewindow(levptr(XConfigureEvent)); |
574 |
|
|
break; |
575 |
|
|
case UnmapNotify: |
576 |
|
|
mapped = 0; |
577 |
|
|
break; |
578 |
|
|
case MapNotify: |
579 |
|
|
mapped = 1; |
580 |
|
|
break; |
581 |
|
|
case Expose: |
582 |
|
|
fixwindow(levptr(XExposeEvent)); |
583 |
|
|
break; |
584 |
|
|
case KeyPress: |
585 |
|
|
getkey(levptr(XKeyPressedEvent)); |
586 |
|
|
break; |
587 |
|
|
case ButtonPress: |
588 |
|
|
getmove(levptr(XButtonPressedEvent)); |
589 |
|
|
break; |
590 |
|
|
} |
591 |
|
|
} |
592 |
|
|
|
593 |
|
|
|
594 |
|
|
static |
595 |
|
|
draw3dline(wp) /* draw 3d line in world coordinates */ |
596 |
|
|
register FVECT wp[2]; |
597 |
|
|
{ |
598 |
|
|
glVertex3d(wp[0][0], wp[0][1], wp[0][2]); |
599 |
|
|
glVertex3d(wp[1][0], wp[1][1], wp[1][2]); |
600 |
|
|
} |
601 |
|
|
|
602 |
|
|
|
603 |
|
|
static |
604 |
|
|
draw_grids() /* draw holodeck section grids */ |
605 |
|
|
{ |
606 |
|
|
static GLubyte gridrgba[4] = {0x0, 0xff, 0xff, 0x00}; |
607 |
|
|
|
608 |
|
|
if (!mapped) |
609 |
|
|
return; |
610 |
|
|
glColor4ub(gridrgba[0], gridrgba[1], gridrgba[2], gridrgba[3]); |
611 |
|
|
/* draw each grid line */ |
612 |
|
|
glBegin(GL_LINES); |
613 |
|
|
gridlines(draw3dline); |
614 |
|
|
glEnd(); |
615 |
|
|
} |
616 |
|
|
|
617 |
|
|
|
618 |
|
|
static int |
619 |
|
|
FindValue(dx, dy) /* find a value on the display */ |
620 |
|
|
int dx, dy; |
621 |
|
|
{ |
622 |
|
|
return(-1); /* not found */ |
623 |
|
|
} |
624 |
|
|
|
625 |
|
|
|
626 |
|
|
static |
627 |
|
|
moveview(dx, dy, mov, orb) /* move our view */ |
628 |
|
|
int dx, dy, mov, orb; |
629 |
|
|
{ |
630 |
|
|
VIEW nv; |
631 |
|
|
FVECT odir, v1; |
632 |
|
|
double d; |
633 |
|
|
register int li; |
634 |
|
|
/* start with old view */ |
635 |
|
|
copystruct(&nv, &odev.v); |
636 |
|
|
/* change view direction */ |
637 |
|
|
if (mov | orb) { |
638 |
|
|
if ((li = FindValue(dx, dy)) < 0) |
639 |
|
|
return(0); /* not on window */ |
640 |
|
|
VSUM(odir, rV.wp[li], nv.vp, -1.); |
641 |
|
|
} else { |
642 |
|
|
if (viewray(nv.vp, nv.vdir, &odev.v, |
643 |
|
|
(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY) |
644 |
|
|
return(0); /* outside view */ |
645 |
|
|
} |
646 |
|
|
if (orb && mov) { /* orbit left/right */ |
647 |
|
|
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov); |
648 |
|
|
VSUM(nv.vp, rV.wp[li], odir, -1.); |
649 |
|
|
spinvector(nv.vdir, nv.vdir, nv.vup, d); |
650 |
|
|
} else if (orb) { /* orbit up/down */ |
651 |
|
|
fcross(v1, odir, nv.vup); |
652 |
|
|
if (normalize(v1) == 0.) |
653 |
|
|
return(0); |
654 |
|
|
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb); |
655 |
|
|
VSUM(nv.vp, rV.wp[li], odir, -1.); |
656 |
|
|
spinvector(nv.vdir, nv.vdir, v1, d); |
657 |
|
|
} else if (mov) { /* move forward/backward */ |
658 |
|
|
d = MOVPCT/100. * mov; |
659 |
|
|
VSUM(nv.vp, nv.vp, odir, d); |
660 |
|
|
} |
661 |
|
|
if (!mov ^ !orb && headlocked) { /* restore head height */ |
662 |
|
|
VSUM(v1, odev.v.vp, nv.vp, -1.); |
663 |
|
|
d = DOT(v1, odev.v.vup); |
664 |
|
|
VSUM(nv.vp, nv.vp, odev.v.vup, d); |
665 |
|
|
} |
666 |
|
|
if (setview(&nv) != NULL) |
667 |
|
|
return(0); /* illegal view */ |
668 |
|
|
dev_view(&nv); |
669 |
|
|
inpresflags |= DFL(DC_SETVIEW); |
670 |
|
|
return(1); |
671 |
|
|
} |
672 |
|
|
|
673 |
|
|
|
674 |
|
|
static |
675 |
|
|
getmove(ebut) /* get view change */ |
676 |
|
|
XButtonPressedEvent *ebut; |
677 |
|
|
{ |
678 |
|
|
int movdir = MOVDIR(ebut->button); |
679 |
|
|
int movorb = MOVORB(ebut->state); |
680 |
|
|
Window rootw, childw; |
681 |
|
|
int rootx, rooty, wx, wy; |
682 |
|
|
unsigned int statemask; |
683 |
|
|
|
684 |
|
|
XNoOp(ourdisplay); |
685 |
|
|
|
686 |
|
|
while (!XCheckMaskEvent(ourdisplay, |
687 |
|
|
ButtonReleaseMask, levptr(XEvent))) { |
688 |
|
|
|
689 |
|
|
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
690 |
|
|
&rootx, &rooty, &wx, &wy, &statemask)) |
691 |
|
|
break; /* on another screen */ |
692 |
|
|
|
693 |
|
|
if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) { |
694 |
|
|
sleep(1); |
695 |
|
|
continue; |
696 |
|
|
} |
697 |
|
|
draw_grids(); |
698 |
|
|
dev_flush(); |
699 |
|
|
} |
700 |
|
|
if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */ |
701 |
|
|
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
702 |
|
|
wx = levptr(XButtonReleasedEvent)->x; |
703 |
|
|
wy = levptr(XButtonReleasedEvent)->y; |
704 |
|
|
moveview(wx, odev.vres-1-wy, movdir, movorb); |
705 |
|
|
} |
706 |
|
|
dev_flush(); |
707 |
|
|
} |
708 |
|
|
|
709 |
|
|
|
710 |
|
|
static |
711 |
|
|
getkey(ekey) /* get input key */ |
712 |
|
|
register XKeyPressedEvent *ekey; |
713 |
|
|
{ |
714 |
|
|
int n; |
715 |
|
|
char buf[8]; |
716 |
|
|
|
717 |
|
|
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
718 |
|
|
if (n != 1) |
719 |
|
|
return; |
720 |
|
|
switch (buf[0]) { |
721 |
|
|
case 'h': /* turn on height motion lock */ |
722 |
|
|
headlocked = 1; |
723 |
|
|
return; |
724 |
|
|
case 'H': /* turn off height motion lock */ |
725 |
|
|
headlocked = 0; |
726 |
|
|
return; |
727 |
|
|
case 'l': /* retrieve last view */ |
728 |
|
|
inpresflags |= DFL(DC_LASTVIEW); |
729 |
|
|
return; |
730 |
|
|
case 'p': /* pause computation */ |
731 |
|
|
inpresflags |= DFL(DC_PAUSE); |
732 |
|
|
return; |
733 |
|
|
case 'v': /* spit out view */ |
734 |
|
|
inpresflags |= DFL(DC_GETVIEW); |
735 |
|
|
return; |
736 |
|
|
case '\n': |
737 |
|
|
case '\r': /* resume computation */ |
738 |
|
|
inpresflags |= DFL(DC_RESUME); |
739 |
|
|
return; |
740 |
|
|
case CTRL('R'): /* redraw screen */ |
741 |
|
|
TMapValues(1); |
742 |
|
|
redraw(); |
743 |
|
|
return; |
744 |
|
|
case CTRL('L'): /* refresh from server */ |
745 |
|
|
if (inpresflags & DFL(DC_REDRAW)) |
746 |
|
|
return; |
747 |
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
748 |
|
|
glDrawBuffer(GL_FRONT); |
749 |
|
|
glDisable(GL_DEPTH_TEST); |
750 |
|
|
draw_grids(); |
751 |
|
|
glEnable(GL_DEPTH_TEST); |
752 |
|
|
glDrawBuffer(GL_FRONT_AND_BACK); |
753 |
|
|
glFlush(); |
754 |
|
|
Compost(100); /* get rid of old values */ |
755 |
|
|
inpresflags |= DFL(DC_REDRAW); /* resend values from server */ |
756 |
|
|
return; |
757 |
|
|
case 'K': /* kill rtrace process(es) */ |
758 |
|
|
inpresflags |= DFL(DC_KILL); |
759 |
|
|
break; |
760 |
|
|
case 'R': /* restart rtrace */ |
761 |
|
|
inpresflags |= DFL(DC_RESTART); |
762 |
|
|
break; |
763 |
|
|
case 'C': /* clobber holodeck */ |
764 |
|
|
inpresflags |= DFL(DC_CLOBBER); |
765 |
|
|
break; |
766 |
|
|
case 'q': /* quit the program */ |
767 |
|
|
inpresflags |= DFL(DC_QUIT); |
768 |
|
|
return; |
769 |
|
|
default: |
770 |
|
|
XBell(ourdisplay, 0); |
771 |
|
|
return; |
772 |
|
|
} |
773 |
|
|
} |
774 |
|
|
|
775 |
|
|
|
776 |
|
|
static |
777 |
|
|
fixwindow(eexp) /* repair damage to window */ |
778 |
|
|
register XExposeEvent *eexp; |
779 |
|
|
{ |
780 |
|
|
if (odev.hres == 0 || odev.vres == 0) { /* first exposure */ |
781 |
|
|
odev.hres = eexp->width; |
782 |
|
|
odev.vres = eexp->height; |
783 |
|
|
} |
784 |
|
|
if (eexp->width == odev.hres && eexp->height == odev.vres) |
785 |
|
|
TMapValues(1); |
786 |
|
|
if (!eexp->count) |
787 |
|
|
redraw(); |
788 |
|
|
} |
789 |
|
|
|
790 |
|
|
|
791 |
|
|
static |
792 |
|
|
resizewindow(ersz) /* resize window */ |
793 |
|
|
register XConfigureEvent *ersz; |
794 |
|
|
{ |
795 |
|
|
if (ersz->width == odev.hres && ersz->height == odev.vres) |
796 |
|
|
return; |
797 |
|
|
|
798 |
|
|
odev.hres = ersz->width; |
799 |
|
|
odev.vres = ersz->height; |
800 |
|
|
|
801 |
|
|
odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres); |
802 |
|
|
odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres); |
803 |
|
|
|
804 |
|
|
setGLview(); |
805 |
|
|
|
806 |
|
|
inpresflags |= DFL(DC_SETVIEW); |
807 |
|
|
} |