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greg |
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#ifndef lint |
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static const char RCSid[] = "$Id$"; |
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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 standard GLX driver. |
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*/ |
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#include "standard.h" |
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#include "rhd_sample.h" |
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#include <sys/types.h> |
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#include <GL/glx.h> |
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#include <GL/glu.h> |
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#include <X11/extensions/SGIStereo.h> |
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#include <gl/get.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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#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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#ifndef TARGETFPS |
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#define TARGETFPS 4.0 /* target frames/sec during motion */ |
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#endif |
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#define MINWIDTH 480 /* minimum stereo window width */ |
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#define MINHEIGHT 400 /* minimum stereo window height */ |
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#define VIEWDIST 356 /* assumed viewing distance (mm) */ |
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#define BORWIDTH 5 /* border width */ |
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#define setstereobuf(bid) (glXWaitGL(), \ |
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XSGISetStereoBuffer(ourdisplay, gwind, bid), \ |
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glXWaitX()) |
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#define ourscreen DefaultScreen(ourdisplay) |
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#define ourroot RootWindow(ourdisplay,ourscreen) |
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#define ourmask (StructureNotifyMask|ExposureMask|KeyPressMask|\ |
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ButtonPressMask|ButtonReleaseMask) |
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#define levptr(etype) ((etype *)¤tevent) |
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struct driver odev; /* global device driver structure */ |
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static VIEW vwright; /* right eye view */ |
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static int rayqleft = 0; /* rays left to queue before flush */ |
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static XEvent currentevent; /* current event */ |
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static int mapped = 0; /* window is mapped? */ |
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static unsigned long ourblack=0, ourwhite=~0; |
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static Display *ourdisplay = NULL; /* our display */ |
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static XVisualInfo *ourvinf; /* our visual information */ |
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static Window gwind = 0; /* our graphics window */ |
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static GLXContext gctx; /* our GLX context */ |
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static double pwidth, pheight; /* pixel dimensions (mm) */ |
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static 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(), eyeview(), |
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wipeclean(), setglpersp(), getmove(), fixwindow(), |
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pushright(), popright(), mytmflags(); |
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extern time_t time(); |
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extern long getmonitor(); |
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dev_open(id) /* initialize GLX driver */ |
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char *id; |
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{ |
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extern char *getenv(); |
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static RGBPRIMS myprims = STDPRIMS; |
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static int atlBest[] = {GLX_RGBA, GLX_RED_SIZE,8, |
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GLX_GREEN_SIZE,8, GLX_BLUE_SIZE,8, |
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GLX_DEPTH_SIZE,15, None}; |
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char *ev; |
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double gamval = GAMMA; |
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RGBPRIMP dpri = stdprims; |
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int firstevent, firsterror; |
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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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switch (XSGIQueryStereoMode(ourdisplay, ourroot)) { |
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case STEREO_TOP: |
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case STEREO_BOTTOM: |
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break; |
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case STEREO_OFF: |
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error(USER, |
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"wrong video mode: run \"/usr/gfx/setmon -n STR_TOP\" first"); |
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case X_STEREO_UNSUPPORTED: |
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error(USER, "stereo mode not supported on this screen"); |
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default: |
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error(INTERNAL, "unknown stereo mode"); |
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} |
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/* 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)/2, |
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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/2; |
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oursizhints.max_width = DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH; |
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oursizhints.max_height = (DisplayHeight(ourdisplay,ourscreen) - |
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2*BORWIDTH)/2; |
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oursizhints.flags = PMinSize|PMaxSize; |
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XSetNormalHints(ourdisplay, gwind, &oursizhints); |
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/* set GLX context */ |
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glXMakeCurrent(ourdisplay, gwind, gctx); |
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glEnable(GL_DEPTH_TEST); |
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glDepthFunc(GL_LEQUAL); |
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glShadeModel(GL_SMOOTH); |
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glDisable(GL_DITHER); |
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glDisable(GL_CULL_FACE); |
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/* figure out sensible view */ |
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pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) / |
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DisplayWidth(ourdisplay, ourscreen); |
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pheight = 2.0 * (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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setstereobuf(STEREO_BUFFER_LEFT); |
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XMapWindow(ourdisplay, gwind); |
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dev_input(); /* sets size and view angles */ |
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/* allocate our samples */ |
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if (!smInit(DisplayWidth(ourdisplay,ourscreen) * |
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DisplayHeight(ourdisplay,ourscreen) / 10)) |
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error(SYSTEM, "insufficient memory for value storage"); |
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odev.name = id; |
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odev.ifd = ConnectionNumber(ourdisplay); |
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} |
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dev_close() /* close our display and free resources */ |
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{ |
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smInit(0); |
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glXMakeCurrent(ourdisplay, None, NULL); |
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glXDestroyContext(ourdisplay, gctx); |
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XDestroyWindow(ourdisplay, gwind); |
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gwind = 0; |
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XCloseDisplay(ourdisplay); |
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ourdisplay = NULL; |
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tmDone(NULL); |
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odev.v.type = 0; |
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odev.hres = odev.vres = 0; |
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odev.ifd = -1; |
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} |
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dev_clear() /* clear our representation */ |
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{ |
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smInit(rsL.maxsamp); |
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wipeclean(); |
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rayqleft = 0; /* hold off update */ |
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} |
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int |
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dev_view(nv) /* assign new driver view */ |
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register VIEW *nv; |
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{ |
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double d; |
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if (nv->type != VT_PER || /* check view legality */ |
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nv->horiz > 160. || nv->vert > 160.) { |
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error(COMMAND, "illegal view type/angle"); |
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nv->type = odev.v.type; |
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nv->horiz = odev.v.horiz; |
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nv->vert = odev.v.vert; |
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return(0); |
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} |
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if (nv != &odev.v) { |
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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)/2; |
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dw -= 25; /* for window frame */ |
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dh -= 50*2; |
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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); /* setview() already called */ |
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setglpersp(&odev.v); |
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copystruct(&vwright, nv); |
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d = eyesepdist / sqrt(nv->hn2); |
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VSUM(vwright.vp, nv->vp, nv->hvec, d); |
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/* setview(&vwright); -- Unnecessary */ |
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checkglerr("setting view"); |
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} |
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wipeclean(); |
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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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hvres[0] = odev.hres; hvres[1] = odev.vres; |
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if (n == 0) |
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return(&odev.v); |
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if (n == 1) |
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return(&vwright); |
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return(NULL); |
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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 quadtree */ |
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COLR c; |
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FVECT p, v; |
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{ |
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smNewsamp(c, p, v); /* add to display representation */ |
| 307 |
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if (!--rayqleft) |
| 308 |
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dev_flush(); /* flush output */ |
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} |
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int |
| 313 |
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dev_flush() /* flush output */ |
| 314 |
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{ |
| 315 |
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pushright(); /* update right eye */ |
| 316 |
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glClear(GL_DEPTH_BUFFER_BIT); |
| 317 |
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smUpdate(&vwright, 100); |
| 318 |
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popright(); /* update left eye */ |
| 319 |
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glClear(GL_DEPTH_BUFFER_BIT); |
| 320 |
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smUpdate(&odev.v, 100); |
| 321 |
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glFlush(); /* flush OGL */ |
| 322 |
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checkglerr("flushing display"); |
| 323 |
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rayqleft = RAYQLEN; |
| 324 |
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return(XPending(ourdisplay)); /* flush X11 and return # pending */ |
| 325 |
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} |
| 326 |
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| 327 |
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| 328 |
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checkglerr(where) /* check for GL or GLU error */ |
| 329 |
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char *where; |
| 330 |
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{ |
| 331 |
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register GLenum errcode; |
| 332 |
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| 333 |
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while ((errcode = glGetError()) != GL_NO_ERROR) { |
| 334 |
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sprintf(errmsg, "OpenGL error %s: %s", |
| 335 |
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where, gluErrorString(errcode)); |
| 336 |
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error(WARNING, errmsg); |
| 337 |
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} |
| 338 |
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} |
| 339 |
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| 341 |
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static |
| 342 |
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pushright() /* push on right view */ |
| 343 |
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{ |
| 344 |
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double d; |
| 345 |
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| 346 |
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setstereobuf(STEREO_BUFFER_RIGHT); |
| 347 |
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glMatrixMode(GL_MODELVIEW); |
| 348 |
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glPushMatrix(); |
| 349 |
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d = -eyesepdist / sqrt(odev.v.hn2); |
| 350 |
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glTranslated(d*odev.v.hvec[0], d*odev.v.hvec[1], d*odev.v.hvec[2]); |
| 351 |
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} |
| 352 |
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| 353 |
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| 354 |
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static |
| 355 |
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popright() /* pop off right view */ |
| 356 |
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{ |
| 357 |
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glMatrixMode(GL_MODELVIEW); |
| 358 |
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glPopMatrix(); |
| 359 |
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setstereobuf(STEREO_BUFFER_LEFT); |
| 360 |
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} |
| 361 |
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| 363 |
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static int |
| 364 |
|
|
mytmflags() /* figure out tone mapping flags */ |
| 365 |
|
|
{ |
| 366 |
|
|
extern char *progname; |
| 367 |
|
|
register char *cp, *tail; |
| 368 |
|
|
/* find basic name */ |
| 369 |
|
|
for (cp = tail = progname; *cp; cp++) |
| 370 |
|
|
if (*cp == '/') |
| 371 |
|
|
tail = cp+1; |
| 372 |
|
|
for (cp = tail; *cp && *cp != '.'; cp++) |
| 373 |
|
|
; |
| 374 |
|
|
if (cp-tail == 3 && !strncmp(tail, "glx2", 3)) |
| 375 |
|
|
return(TM_F_CAMERA|TM_F_NOSTDERR); |
| 376 |
|
|
if (cp-tail == 4 && !strncmp(tail, "glx2h", 4)) |
| 377 |
|
|
return(TM_F_HUMAN|TM_F_NOSTDERR); |
| 378 |
|
|
error(USER, "illegal driver name"); |
| 379 |
|
|
} |
| 380 |
|
|
|
| 381 |
|
|
|
| 382 |
|
|
static |
| 383 |
|
|
getevent() /* get next event */ |
| 384 |
|
|
{ |
| 385 |
|
|
XNextEvent(ourdisplay, levptr(XEvent)); |
| 386 |
|
|
switch (levptr(XEvent)->type) { |
| 387 |
|
|
case ConfigureNotify: |
| 388 |
|
|
resizewindow(levptr(XConfigureEvent)); |
| 389 |
|
|
break; |
| 390 |
|
|
case UnmapNotify: |
| 391 |
|
|
mapped = 0; |
| 392 |
|
|
break; |
| 393 |
|
|
case MapNotify: |
| 394 |
|
|
mapped = 1; |
| 395 |
|
|
break; |
| 396 |
|
|
case Expose: |
| 397 |
|
|
fixwindow(levptr(XExposeEvent)); |
| 398 |
|
|
break; |
| 399 |
|
|
case KeyPress: |
| 400 |
|
|
getkey(levptr(XKeyPressedEvent)); |
| 401 |
|
|
break; |
| 402 |
|
|
case ButtonPress: |
| 403 |
|
|
getmove(levptr(XButtonPressedEvent)); |
| 404 |
|
|
break; |
| 405 |
|
|
} |
| 406 |
|
|
} |
| 407 |
|
|
|
| 408 |
|
|
|
| 409 |
|
|
static |
| 410 |
|
|
draw3dline(wp) /* draw 3d line in world coordinates */ |
| 411 |
|
|
register FVECT wp[2]; |
| 412 |
|
|
{ |
| 413 |
|
|
glVertex3d(wp[0][0], wp[0][1], wp[0][2]); |
| 414 |
|
|
glVertex3d(wp[1][0], wp[1][1], wp[1][2]); |
| 415 |
|
|
} |
| 416 |
|
|
|
| 417 |
|
|
|
| 418 |
|
|
static |
| 419 |
|
|
draw_grids() /* draw holodeck section grids */ |
| 420 |
|
|
{ |
| 421 |
|
|
static BYTE gridrgba[4] = {0x0, 0xff, 0xff, 0x00}; |
| 422 |
|
|
|
| 423 |
|
|
if (!mapped) |
| 424 |
|
|
return; |
| 425 |
|
|
glColor4ub(gridrgba[0], gridrgba[1], gridrgba[2], gridrgba[3]); |
| 426 |
|
|
glBegin(GL_LINES); /* draw each grid line */ |
| 427 |
|
|
gridlines(draw3dline); |
| 428 |
|
|
glEnd(); |
| 429 |
|
|
} |
| 430 |
|
|
|
| 431 |
|
|
|
| 432 |
|
|
static |
| 433 |
|
|
moveview(dx, dy, mov, orb) /* move our view */ |
| 434 |
|
|
int dx, dy, mov, orb; |
| 435 |
|
|
{ |
| 436 |
|
|
VIEW nv; |
| 437 |
|
|
FVECT odir, v1; |
| 438 |
|
|
double d; |
| 439 |
|
|
register int li; |
| 440 |
|
|
/* start with old view */ |
| 441 |
|
|
copystruct(&nv, &odev.v); |
| 442 |
|
|
/* change view direction */ |
| 443 |
|
|
if (viewray(v1, odir, &odev.v, |
| 444 |
|
|
(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY) |
| 445 |
|
|
return(0); /* outside view */ |
| 446 |
|
|
if (mov | orb) { |
| 447 |
|
|
if ((li = smFindsamp(v1, odir)) < 0) |
| 448 |
|
|
return(0); /* not on window */ |
| 449 |
|
|
VSUM(odir, rsL.wp[li], nv.vp, -1.); |
| 450 |
|
|
} else |
| 451 |
|
|
VCOPY(nv.vdir, odir); |
| 452 |
|
|
if (orb && mov) { /* orbit left/right */ |
| 453 |
|
|
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov); |
| 454 |
|
|
VSUM(nv.vp, rsL.wp[li], odir, -1.); |
| 455 |
|
|
spinvector(nv.vdir, nv.vdir, nv.vup, d); |
| 456 |
|
|
} else if (orb) { /* orbit up/down */ |
| 457 |
|
|
fcross(v1, odir, nv.vup); |
| 458 |
|
|
if (normalize(v1) == 0.) |
| 459 |
|
|
return(0); |
| 460 |
|
|
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb); |
| 461 |
|
|
VSUM(nv.vp, rsL.wp[li], odir, -1.); |
| 462 |
|
|
spinvector(nv.vdir, nv.vdir, v1, d); |
| 463 |
|
|
} else if (mov) { /* move forward/backward */ |
| 464 |
|
|
d = MOVPCT/100. * mov; |
| 465 |
|
|
VSUM(nv.vp, nv.vp, odir, d); |
| 466 |
|
|
} |
| 467 |
|
|
if (!mov ^ !orb && headlocked) { /* restore head height */ |
| 468 |
|
|
VSUM(v1, odev.v.vp, nv.vp, -1.); |
| 469 |
|
|
d = DOT(v1, odev.v.vup); |
| 470 |
|
|
VSUM(nv.vp, nv.vp, odev.v.vup, d); |
| 471 |
|
|
} |
| 472 |
|
|
if (setview(&nv) != NULL) |
| 473 |
|
|
return(0); /* illegal view */ |
| 474 |
|
|
dev_view(&nv); |
| 475 |
|
|
inpresflags |= DFL(DC_SETVIEW); |
| 476 |
|
|
return(1); |
| 477 |
|
|
} |
| 478 |
|
|
|
| 479 |
|
|
|
| 480 |
|
|
static |
| 481 |
|
|
getmove(ebut) /* get view change */ |
| 482 |
|
|
XButtonPressedEvent *ebut; |
| 483 |
|
|
{ |
| 484 |
|
|
int movdir = MOVDIR(ebut->button); |
| 485 |
|
|
int movorb = MOVORB(ebut->state); |
| 486 |
|
|
int qlevel = 100; |
| 487 |
|
|
time_t lasttime, thistime; |
| 488 |
|
|
int nframes; |
| 489 |
|
|
Window rootw, childw; |
| 490 |
|
|
int rootx, rooty, wx, wy; |
| 491 |
|
|
unsigned int statemask; |
| 492 |
|
|
|
| 493 |
|
|
XNoOp(ourdisplay); |
| 494 |
|
|
|
| 495 |
|
|
lasttime = time(0); nframes = 0; |
| 496 |
|
|
while (!XCheckMaskEvent(ourdisplay, |
| 497 |
|
|
ButtonReleaseMask, levptr(XEvent))) { |
| 498 |
|
|
|
| 499 |
|
|
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
| 500 |
|
|
&rootx, &rooty, &wx, &wy, &statemask)) |
| 501 |
|
|
break; /* on another screen */ |
| 502 |
|
|
|
| 503 |
|
|
if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) { |
| 504 |
|
|
sleep(1); |
| 505 |
|
|
lasttime++; |
| 506 |
|
|
continue; |
| 507 |
|
|
} |
| 508 |
|
|
pushright(); |
| 509 |
|
|
draw_grids(); |
| 510 |
|
|
smUpdate(&vwright, qlevel); |
| 511 |
|
|
popright(); |
| 512 |
|
|
draw_grids(); |
| 513 |
|
|
smUpdate(&odev.v, qlevel); |
| 514 |
|
|
glFlush(); |
| 515 |
|
|
checkglerr("moving view"); |
| 516 |
|
|
nframes++; |
| 517 |
|
|
thistime = time(0); |
| 518 |
|
|
if (thistime - lasttime >= 3 || |
| 519 |
|
|
nframes > (int)(3*3*TARGETFPS)) { |
| 520 |
|
|
qlevel = thistime<=lasttime ? 1000 : |
| 521 |
|
|
(int)((double)nframes/(thistime-lasttime) |
| 522 |
|
|
/ TARGETFPS * qlevel + 0.5); |
| 523 |
|
|
lasttime = thistime; nframes = 0; |
| 524 |
|
|
if (qlevel > 100) { |
| 525 |
|
|
if (qlevel > 300) { /* put on the brakes */ |
| 526 |
|
|
sleep(1); |
| 527 |
|
|
lasttime++; |
| 528 |
|
|
} |
| 529 |
|
|
qlevel = 100; |
| 530 |
|
|
} else if (qlevel < 1) |
| 531 |
|
|
qlevel = 1; |
| 532 |
|
|
} |
| 533 |
|
|
} |
| 534 |
|
|
if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */ |
| 535 |
|
|
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
| 536 |
|
|
wx = levptr(XButtonReleasedEvent)->x; |
| 537 |
|
|
wy = levptr(XButtonReleasedEvent)->y; |
| 538 |
|
|
moveview(wx, odev.vres-1-wy, movdir, movorb); |
| 539 |
|
|
} |
| 540 |
|
|
} |
| 541 |
|
|
|
| 542 |
|
|
|
| 543 |
|
|
static |
| 544 |
|
|
setglpersp(vp) /* set perspective view in GL */ |
| 545 |
|
|
register VIEW *vp; |
| 546 |
|
|
{ |
| 547 |
|
|
double d, xmin, xmax, ymin, ymax, zmin, zmax; |
| 548 |
|
|
|
| 549 |
|
|
zmin = 0.1; |
| 550 |
|
|
zmax = 1000.; |
| 551 |
|
|
if (odev.v.vfore > FTINY) |
| 552 |
|
|
zmin = odev.v.vfore; |
| 553 |
|
|
if (odev.v.vaft > FTINY) |
| 554 |
|
|
zmax = odev.v.vaft; |
| 555 |
|
|
xmax = zmin * tan(PI/180./2. * odev.v.horiz); |
| 556 |
|
|
xmin = -xmax; |
| 557 |
|
|
d = odev.v.hoff * (xmax - xmin); |
| 558 |
|
|
xmin += d; xmax += d; |
| 559 |
|
|
ymax = zmin * tan(PI/180./2. * odev.v.vert); |
| 560 |
|
|
ymin = -ymax; |
| 561 |
|
|
d = odev.v.voff * (ymax - ymin); |
| 562 |
|
|
ymin += d; ymax += d; |
| 563 |
|
|
/* set view matrix */ |
| 564 |
|
|
glMatrixMode(GL_PROJECTION); |
| 565 |
|
|
glLoadIdentity(); |
| 566 |
|
|
glFrustum(xmin, xmax, ymin, ymax, zmin, zmax); |
| 567 |
|
|
gluLookAt(odev.v.vp[0], odev.v.vp[1], odev.v.vp[2], |
| 568 |
|
|
odev.v.vp[0] + odev.v.vdir[0], |
| 569 |
|
|
odev.v.vp[1] + odev.v.vdir[1], |
| 570 |
|
|
odev.v.vp[2] + odev.v.vdir[2], |
| 571 |
|
|
odev.v.vup[0], odev.v.vup[1], odev.v.vup[2]); |
| 572 |
|
|
} |
| 573 |
|
|
|
| 574 |
|
|
|
| 575 |
|
|
wipeclean() /* prepare for redraw */ |
| 576 |
|
|
{ |
| 577 |
|
|
setstereobuf(STEREO_BUFFER_RIGHT); |
| 578 |
|
|
glClear(GL_DEPTH_BUFFER_BIT); |
| 579 |
|
|
setstereobuf(STEREO_BUFFER_LEFT); |
| 580 |
|
|
glClear(GL_DEPTH_BUFFER_BIT); |
| 581 |
|
|
smClean(); |
| 582 |
|
|
} |
| 583 |
|
|
|
| 584 |
|
|
|
| 585 |
|
|
static |
| 586 |
|
|
getkey(ekey) /* get input key */ |
| 587 |
|
|
register XKeyPressedEvent *ekey; |
| 588 |
|
|
{ |
| 589 |
|
|
int n; |
| 590 |
|
|
char buf[8]; |
| 591 |
|
|
|
| 592 |
|
|
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
| 593 |
|
|
if (n != 1) |
| 594 |
|
|
return; |
| 595 |
|
|
switch (buf[0]) { |
| 596 |
|
|
case 'h': /* turn on height motion lock */ |
| 597 |
|
|
headlocked = 1; |
| 598 |
|
|
return; |
| 599 |
|
|
case 'H': /* turn off height motion lock */ |
| 600 |
|
|
headlocked = 0; |
| 601 |
|
|
return; |
| 602 |
|
|
case 'l': /* retrieve last view */ |
| 603 |
|
|
inpresflags |= DFL(DC_LASTVIEW); |
| 604 |
|
|
return; |
| 605 |
|
|
case 'p': /* pause computation */ |
| 606 |
|
|
inpresflags |= DFL(DC_PAUSE); |
| 607 |
|
|
return; |
| 608 |
|
|
case 'v': /* spit out view */ |
| 609 |
|
|
inpresflags |= DFL(DC_GETVIEW); |
| 610 |
|
|
return; |
| 611 |
|
|
case '\n': |
| 612 |
|
|
case '\r': /* resume computation */ |
| 613 |
|
|
inpresflags |= DFL(DC_RESUME); |
| 614 |
|
|
return; |
| 615 |
|
|
case CTRL('R'): /* redraw screen */ |
| 616 |
|
|
wipeclean(); |
| 617 |
|
|
return; |
| 618 |
|
|
case CTRL('L'): /* refresh from server */ |
| 619 |
|
|
if (inpresflags & DFL(DC_REDRAW)) |
| 620 |
|
|
return; |
| 621 |
|
|
eyeview(VWRIGHT); |
| 622 |
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| 623 |
|
|
draw_grids(); |
| 624 |
|
|
eyeview(VWLEFT); |
| 625 |
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| 626 |
|
|
draw_grids(); |
| 627 |
|
|
glFlush(); |
| 628 |
|
|
smInit(rsL.maxsamp); /* get rid of old values */ |
| 629 |
|
|
inpresflags |= DFL(DC_REDRAW); /* resend values from server */ |
| 630 |
|
|
rayqleft = 0; /* hold off update */ |
| 631 |
|
|
return; |
| 632 |
|
|
case 'K': /* kill rtrace process(es) */ |
| 633 |
|
|
inpresflags |= DFL(DC_KILL); |
| 634 |
|
|
break; |
| 635 |
|
|
case 'R': /* restart rtrace */ |
| 636 |
|
|
inpresflags |= DFL(DC_RESTART); |
| 637 |
|
|
break; |
| 638 |
|
|
case 'C': /* clobber holodeck */ |
| 639 |
|
|
inpresflags |= DFL(DC_CLOBBER); |
| 640 |
|
|
break; |
| 641 |
|
|
case 'q': /* quit the program */ |
| 642 |
|
|
inpresflags |= DFL(DC_QUIT); |
| 643 |
|
|
return; |
| 644 |
|
|
default: |
| 645 |
|
|
XBell(ourdisplay, 0); |
| 646 |
|
|
return; |
| 647 |
|
|
} |
| 648 |
|
|
} |
| 649 |
|
|
|
| 650 |
|
|
|
| 651 |
|
|
static |
| 652 |
|
|
fixwindow(eexp) /* repair damage to window */ |
| 653 |
|
|
register XExposeEvent *eexp; |
| 654 |
|
|
{ |
| 655 |
|
|
if (odev.hres == 0 | odev.vres == 0) { /* first exposure */ |
| 656 |
|
|
resizewindow((XConfigureEvent *)eexp); |
| 657 |
|
|
return; |
| 658 |
|
|
} |
| 659 |
|
|
if (eexp->count) /* wait for final exposure */ |
| 660 |
|
|
return; |
| 661 |
|
|
wipeclean(); /* clear depth */ |
| 662 |
|
|
} |
| 663 |
|
|
|
| 664 |
|
|
|
| 665 |
|
|
static |
| 666 |
|
|
resizewindow(ersz) /* resize window */ |
| 667 |
|
|
register XConfigureEvent *ersz; |
| 668 |
|
|
{ |
| 669 |
|
|
/* glViewport(0, 0, ersz->width, ersz->height); */ |
| 670 |
|
|
|
| 671 |
|
|
if (ersz->width == odev.hres && ersz->height == odev.vres) |
| 672 |
|
|
return; |
| 673 |
|
|
|
| 674 |
|
|
odev.hres = ersz->width; |
| 675 |
|
|
odev.vres = ersz->height; |
| 676 |
|
|
|
| 677 |
|
|
odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres); |
| 678 |
|
|
odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres); |
| 679 |
|
|
|
| 680 |
|
|
inpresflags |= DFL(DC_SETVIEW); |
| 681 |
|
|
} |
