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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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|
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#ifndef lint |
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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 old GLX driver using cones. |
10 |
* |
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* Define symbol STEREO for stereo viewing. |
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* Define symbol DOBJ for display object viewing. |
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*/ |
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|
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#ifdef NOSTEREO |
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#ifdef STEREO |
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#undef STEREO |
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#else |
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#undef NOSTEREO |
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#endif |
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#endif |
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|
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#include "standard.h" |
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#include "rhd_sample.h" |
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|
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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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#ifdef STEREO |
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#include <X11/extensions/SGIStereo.h> |
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#endif |
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#ifdef DOBJ |
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#include "rhdobj.h" |
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#endif |
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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 250 /* 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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#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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#ifndef TARGETFPS |
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#define TARGETFPS 4.0 /* target frames/sec during motion */ |
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#endif |
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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 setstereobuf(bid) (glXWaitGL(), \ |
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XSGISetStereoBuffer(ourdisplay, gwind, bid), \ |
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glXWaitX()) |
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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 VIEW vwright; /* right eye view */ |
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|
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static int rayqleft = 0; /* rays left to queue before flush */ |
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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 mindpth, maxdpth; /* min. and max. depth */ |
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|
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double dev_zmin, dev_zmax; /* fore and aft clipping plane dist. */ |
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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(), wipeclean(), |
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setglpersp(), getmove(), fixwindow(), mytmflags(); |
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|
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#ifdef STEREO |
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static int pushright(), popright(); |
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#endif |
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|
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extern time_t time(); |
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|
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|
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dev_open(id) /* initialize GLX driver */ |
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char *id; |
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{ |
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extern char *getenv(); |
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static RGBPRIMS myprims = STDPRIMS; |
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static int atlBest[] = {GLX_RGBA, GLX_RED_SIZE,8, |
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GLX_GREEN_SIZE,8, GLX_BLUE_SIZE,8, |
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GLX_DEPTH_SIZE,15, None}; |
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char *ev; |
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double gamval = GAMMA; |
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RGBPRIMP dpri = stdprims; |
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XSetWindowAttributes ourwinattr; |
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XWMHints ourxwmhints; |
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XSizeHints oursizhints; |
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/* check for unsupported stereo */ |
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#ifdef NOSTEREO |
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error(USER, "stereo display driver unavailable"); |
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#endif |
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/* open display server */ |
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ourdisplay = XOpenDisplay(NULL); |
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if (ourdisplay == NULL) |
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error(USER, "cannot open X-windows; DISPLAY variable set?\n"); |
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#ifdef STEREO |
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switch (XSGIQueryStereoMode(ourdisplay, ourroot)) { |
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case STEREO_TOP: |
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case STEREO_BOTTOM: |
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break; |
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case STEREO_OFF: |
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error(USER, |
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"wrong video mode: run \"/usr/gfx/setmon -n STR_TOP\" first"); |
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case X_STEREO_UNSUPPORTED: |
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error(USER, "stereo mode not supported on this screen"); |
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default: |
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error(INTERNAL, "unknown stereo mode"); |
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} |
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#endif |
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/* find a usable visual */ |
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ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlBest); |
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if (ourvinf == NULL) |
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error(USER, "no suitable visuals available"); |
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/* get a context */ |
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gctx = glXCreateContext(ourdisplay, ourvinf, NULL, GL_TRUE); |
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/* set gamma and tone mapping */ |
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if ((ev = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL |
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|| (ev = getenv("DISPLAY_GAMMA")) != NULL) |
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gamval = atof(ev); |
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if ((ev = getenv("DISPLAY_PRIMARIES")) != NULL && |
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sscanf(ev, "%f %f %f %f %f %f %f %f", |
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&myprims[RED][CIEX],&myprims[RED][CIEY], |
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&myprims[GRN][CIEX],&myprims[GRN][CIEY], |
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&myprims[BLU][CIEX],&myprims[BLU][CIEY], |
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&myprims[WHT][CIEX],&myprims[WHT][CIEY]) >= 6) |
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dpri = myprims; |
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if (tmInit(mytmflags(), dpri, gamval) == NULL) |
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error(SYSTEM, "not enough memory in dev_open"); |
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/* open window */ |
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ourwinattr.background_pixel = ourblack; |
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ourwinattr.border_pixel = ourblack; |
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ourwinattr.event_mask = ourmask; |
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/* this is stupid */ |
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ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot, |
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ourvinf->visual, AllocNone); |
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gwind = XCreateWindow(ourdisplay, ourroot, 0, 0, |
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DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH, |
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#ifdef STEREO |
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(DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH)/2, |
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#else |
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DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH, |
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#endif |
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BORWIDTH, ourvinf->depth, InputOutput, ourvinf->visual, |
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CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &ourwinattr); |
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if (gwind == 0) |
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error(SYSTEM, "cannot create window\n"); |
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XStoreName(ourdisplay, gwind, id); |
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/* set window manager hints */ |
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ourxwmhints.flags = InputHint|IconPixmapHint; |
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ourxwmhints.input = True; |
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ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay, |
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gwind, x11icon_bits, x11icon_width, x11icon_height); |
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XSetWMHints(ourdisplay, gwind, &ourxwmhints); |
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oursizhints.min_width = MINWIDTH; |
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#ifdef STEREO |
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oursizhints.min_height = MINHEIGHT/2; |
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oursizhints.max_width = DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH; |
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oursizhints.max_height = (DisplayHeight(ourdisplay,ourscreen) - |
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2*BORWIDTH)/2; |
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oursizhints.flags = PMinSize|PMaxSize; |
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#else |
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oursizhints.min_height = MINHEIGHT; |
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oursizhints.flags = PMinSize; |
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#endif |
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XSetNormalHints(ourdisplay, gwind, &oursizhints); |
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/* set GLX context */ |
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glXMakeCurrent(ourdisplay, gwind, gctx); |
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glEnable(GL_DEPTH_TEST); |
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glDepthFunc(GL_LEQUAL); |
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glShadeModel(GL_SMOOTH); |
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glDisable(GL_DITHER); |
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glDisable(GL_CULL_FACE); |
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/* figure out sensible view */ |
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pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) / |
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DisplayWidth(ourdisplay, ourscreen); |
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pheight = (double)DisplayHeightMM(ourdisplay, ourscreen) / |
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DisplayHeight(ourdisplay, ourscreen); |
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#ifdef STEREO |
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pheight *= 2.; |
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setstereobuf(STEREO_BUFFER_LEFT); |
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#endif |
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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 samples */ |
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if (!smInit(DisplayWidth(ourdisplay,ourscreen) * |
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DisplayHeight(ourdisplay,ourscreen) / 10)) |
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error(SYSTEM, "insufficient memory for value storage"); |
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mindpth = FHUGE; maxdpth = FTINY; |
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odev.name = id; |
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odev.ifd = ConnectionNumber(ourdisplay); |
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} |
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|
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|
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dev_close() /* close our display and free resources */ |
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{ |
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smInit(0); |
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#ifdef DOBJ |
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dobj_cleanup(); |
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#endif |
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glXMakeCurrent(ourdisplay, None, NULL); |
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glXDestroyContext(ourdisplay, gctx); |
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XDestroyWindow(ourdisplay, gwind); |
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gwind = 0; |
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XCloseDisplay(ourdisplay); |
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ourdisplay = NULL; |
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tmDone(NULL); |
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odev.v.type = 0; |
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odev.hres = odev.vres = 0; |
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odev.ifd = -1; |
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} |
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|
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|
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dev_clear() /* clear our representation */ |
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{ |
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smInit(rsL.max_samp); |
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wipeclean(); |
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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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double d; |
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|
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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 && /* resize window? */ |
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(!FEQ(nv->horiz,odev.v.horiz) || |
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!FEQ(nv->vert,odev.v.vert))) { |
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int dw = DisplayWidth(ourdisplay,ourscreen); |
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int dh = DisplayHeight(ourdisplay,ourscreen); |
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|
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dw -= 25; /* for window frame */ |
282 |
dh -= 50; |
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#ifdef STEREO |
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dh /= 2; |
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#endif |
286 |
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; |
297 |
} |
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XResizeWindow(ourdisplay, gwind, odev.hres, odev.vres); |
299 |
dev_input(); /* get resize event */ |
300 |
} |
301 |
copystruct(&odev.v, nv); /* setview() already called */ |
302 |
setglpersp(&odev.v); |
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#ifdef STEREO |
304 |
copystruct(&vwright, nv); |
305 |
d = eyesepdist / sqrt(nv->hn2); |
306 |
VSUM(vwright.vp, nv->vp, nv->hvec, d); |
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/* setview(&vwright); -- Unnecessary */ |
308 |
#endif |
309 |
checkglerr("setting view"); |
310 |
wipeclean(); |
311 |
return(1); |
312 |
} |
313 |
|
314 |
|
315 |
dev_auxcom(cmd, args) /* process an auxiliary command */ |
316 |
char *cmd, *args; |
317 |
{ |
318 |
#ifdef DOBJ |
319 |
if (dobj_command(cmd, args) >= 0) |
320 |
return; |
321 |
#endif |
322 |
sprintf(errmsg, "%s: unknown command", cmd); |
323 |
error(COMMAND, errmsg); |
324 |
} |
325 |
|
326 |
|
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VIEW * |
328 |
dev_auxview(n, hvres) /* return nth auxiliary view */ |
329 |
int n; |
330 |
int hvres[2]; |
331 |
{ |
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hvres[0] = odev.hres; hvres[1] = odev.vres; |
333 |
if (n == 0) |
334 |
return(&odev.v); |
335 |
#ifdef STEREO |
336 |
if (n == 1) |
337 |
return(&vwright); |
338 |
#endif |
339 |
return(NULL); |
340 |
} |
341 |
|
342 |
|
343 |
int |
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dev_input() /* get X11 input */ |
345 |
{ |
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inpresflags = 0; |
347 |
|
348 |
do |
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getevent(); |
350 |
|
351 |
while (XPending(ourdisplay) > 0); |
352 |
|
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odev.inpready = 0; |
354 |
|
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return(inpresflags); |
356 |
} |
357 |
|
358 |
|
359 |
dev_value(c, d, p) /* add a pixel value to our mesh */ |
360 |
COLR c; |
361 |
FVECT d, p; |
362 |
{ |
363 |
double depth; |
364 |
#ifdef DOBJ |
365 |
if (dobj_lightsamp != NULL) { /* in light source sampling */ |
366 |
(*dobj_lightsamp)(c, d, p); |
367 |
return; |
368 |
} |
369 |
#endif |
370 |
smNewSamp(c, d, p); /* add to display representation */ |
371 |
if (p != NULL) { |
372 |
depth = (p[0] - odev.v.vp[0])*d[0] + |
373 |
(p[1] - odev.v.vp[1])*d[1] + |
374 |
(p[2] - odev.v.vp[2])*d[2]; |
375 |
if (depth > FTINY) { |
376 |
if (depth < mindpth) |
377 |
mindpth = depth; |
378 |
if (depth > maxdpth) |
379 |
maxdpth = depth; |
380 |
} |
381 |
} |
382 |
if (!--rayqleft) |
383 |
dev_flush(); /* flush output */ |
384 |
} |
385 |
|
386 |
|
387 |
int |
388 |
dev_flush() /* flush output */ |
389 |
{ |
390 |
#ifdef STEREO |
391 |
pushright(); /* update right eye */ |
392 |
glClear(GL_DEPTH_BUFFER_BIT); |
393 |
smUpdate(&vwright, 100); |
394 |
#ifdef DOBJ |
395 |
dobj_render(); /* usually in foreground */ |
396 |
#endif |
397 |
popright(); /* update left eye */ |
398 |
glClear(GL_DEPTH_BUFFER_BIT); |
399 |
#endif |
400 |
smUpdate(&odev.v, 100); |
401 |
#ifdef DOBJ |
402 |
dobj_render(); |
403 |
#endif |
404 |
glFlush(); /* flush OGL */ |
405 |
checkglerr("flushing display"); |
406 |
rayqleft = RAYQLEN; |
407 |
/* flush X11 and return # pending */ |
408 |
return(odev.inpready = XPending(ourdisplay)); |
409 |
} |
410 |
|
411 |
|
412 |
checkglerr(where) /* check for GL or GLU error */ |
413 |
char *where; |
414 |
{ |
415 |
register GLenum errcode; |
416 |
|
417 |
while ((errcode = glGetError()) != GL_NO_ERROR) { |
418 |
sprintf(errmsg, "OpenGL error %s: %s", |
419 |
where, gluErrorString(errcode)); |
420 |
error(WARNING, errmsg); |
421 |
} |
422 |
} |
423 |
|
424 |
|
425 |
#ifdef STEREO |
426 |
static |
427 |
pushright() /* push on right view */ |
428 |
{ |
429 |
double d; |
430 |
|
431 |
setstereobuf(STEREO_BUFFER_RIGHT); |
432 |
glMatrixMode(GL_MODELVIEW); |
433 |
glPushMatrix(); |
434 |
d = -eyesepdist / sqrt(odev.v.hn2); |
435 |
glTranslated(d*odev.v.hvec[0], d*odev.v.hvec[1], d*odev.v.hvec[2]); |
436 |
} |
437 |
|
438 |
|
439 |
static |
440 |
popright() /* pop off right view */ |
441 |
{ |
442 |
glMatrixMode(GL_MODELVIEW); |
443 |
glPopMatrix(); |
444 |
setstereobuf(STEREO_BUFFER_LEFT); |
445 |
} |
446 |
#endif |
447 |
|
448 |
|
449 |
static int |
450 |
mytmflags() /* figure out tone mapping flags */ |
451 |
{ |
452 |
extern char *progname; |
453 |
register char *cp, *tail; |
454 |
/* find basic name */ |
455 |
for (cp = tail = progname; *cp; cp++) |
456 |
if (*cp == '/') |
457 |
tail = cp+1; |
458 |
for (cp = tail; *cp && *cp != '.'; cp++) |
459 |
; |
460 |
if (cp > tail && cp[-1] == 'h') |
461 |
return(TM_F_HUMAN|TM_F_NOSTDERR); |
462 |
else |
463 |
return(TM_F_CAMERA|TM_F_NOSTDERR); |
464 |
} |
465 |
|
466 |
|
467 |
static |
468 |
getevent() /* get next event */ |
469 |
{ |
470 |
XNextEvent(ourdisplay, levptr(XEvent)); |
471 |
switch (levptr(XEvent)->type) { |
472 |
case ConfigureNotify: |
473 |
resizewindow(levptr(XConfigureEvent)); |
474 |
break; |
475 |
case UnmapNotify: |
476 |
mapped = 0; |
477 |
break; |
478 |
case MapNotify: |
479 |
mapped = 1; |
480 |
break; |
481 |
case Expose: |
482 |
fixwindow(levptr(XExposeEvent)); |
483 |
break; |
484 |
case KeyPress: |
485 |
getkey(levptr(XKeyPressedEvent)); |
486 |
break; |
487 |
case ButtonPress: |
488 |
getmove(levptr(XButtonPressedEvent)); |
489 |
break; |
490 |
} |
491 |
} |
492 |
|
493 |
|
494 |
static |
495 |
draw3dline(wp) /* draw 3d line in world coordinates */ |
496 |
register FVECT wp[2]; |
497 |
{ |
498 |
glVertex3d(wp[0][0], wp[0][1], wp[0][2]); |
499 |
glVertex3d(wp[1][0], wp[1][1], wp[1][2]); |
500 |
} |
501 |
|
502 |
|
503 |
static |
504 |
draw_grids() /* draw holodeck section grids */ |
505 |
{ |
506 |
static BYTE gridrgba[4] = {0x0, 0xff, 0xff, 0x00}; |
507 |
|
508 |
if (!mapped) |
509 |
return; |
510 |
glColor4ub(gridrgba[0], gridrgba[1], gridrgba[2], gridrgba[3]); |
511 |
glBegin(GL_LINES); /* draw each grid line */ |
512 |
gridlines(draw3dline); |
513 |
glEnd(); |
514 |
} |
515 |
|
516 |
|
517 |
static |
518 |
moveview(dx, dy, mov, orb) /* move our view */ |
519 |
int dx, dy, mov, orb; |
520 |
{ |
521 |
VIEW nv; |
522 |
FVECT odir, v1, wip; |
523 |
double d; |
524 |
register int li; |
525 |
/* start with old view */ |
526 |
copystruct(&nv, &odev.v); |
527 |
/* change view direction */ |
528 |
if (viewray(v1, odir, &odev.v, |
529 |
(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY) |
530 |
return(0); /* outside view */ |
531 |
if (mov | orb) { |
532 |
#ifdef DOBJ |
533 |
d = dobj_trace(v1, odir); /* check objects */ |
534 |
/* is holodeck in front? */ |
535 |
if ((li = smFindSamp(v1, odir)) >= 0 && |
536 |
(rsL.wp[li][0] - nv.vp[0])*odir[0] + |
537 |
(rsL.wp[li][1] - nv.vp[1])*odir[1] + |
538 |
(rsL.wp[li][2] - nv.vp[2])*odir[2] < d) |
539 |
VCOPY(wip, rsL.wp[li]); |
540 |
else if (d < .99*FHUGE) /* object is closer */ |
541 |
VSUM(wip, nv.vp, odir, d); |
542 |
else /* nothing visible */ |
543 |
return(0); |
544 |
#else |
545 |
if ((li = smFindSamp(v1, odir)) < 0) |
546 |
return(0); /* not on window */ |
547 |
VCOPY(wip, rsL.wp[li]); |
548 |
#endif |
549 |
VSUM(odir, wip, nv.vp, -1.); |
550 |
} else |
551 |
VCOPY(nv.vdir, odir); |
552 |
if (orb && mov) { /* orbit left/right */ |
553 |
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov); |
554 |
VSUM(nv.vp, wip, odir, -1.); |
555 |
spinvector(nv.vdir, nv.vdir, nv.vup, d); |
556 |
} else if (orb) { /* orbit up/down */ |
557 |
fcross(v1, odir, nv.vup); |
558 |
if (normalize(v1) == 0.) |
559 |
return(0); |
560 |
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb); |
561 |
VSUM(nv.vp, wip, odir, -1.); |
562 |
spinvector(nv.vdir, nv.vdir, v1, d); |
563 |
} else if (mov) { /* move forward/backward */ |
564 |
d = MOVPCT/100. * mov; |
565 |
VSUM(nv.vp, nv.vp, odir, d); |
566 |
} |
567 |
if (!mov ^ !orb && headlocked) { /* restore head height */ |
568 |
VSUM(v1, odev.v.vp, nv.vp, -1.); |
569 |
d = DOT(v1, odev.v.vup); |
570 |
VSUM(nv.vp, nv.vp, odev.v.vup, d); |
571 |
} |
572 |
if (setview(&nv) != NULL) |
573 |
return(0); /* illegal view */ |
574 |
dev_view(&nv); |
575 |
inpresflags |= DFL(DC_SETVIEW); |
576 |
return(1); |
577 |
} |
578 |
|
579 |
|
580 |
static |
581 |
getmove(ebut) /* get view change */ |
582 |
XButtonPressedEvent *ebut; |
583 |
{ |
584 |
int movdir = MOVDIR(ebut->button); |
585 |
int movorb = MOVORB(ebut->state); |
586 |
int qlevel = 99; |
587 |
time_t lasttime, thistime; |
588 |
int nframes; |
589 |
Window rootw, childw; |
590 |
int rootx, rooty, wx, wy; |
591 |
unsigned int statemask; |
592 |
|
593 |
XNoOp(ourdisplay); |
594 |
|
595 |
lasttime = time(0); nframes = 0; |
596 |
while (!XCheckMaskEvent(ourdisplay, |
597 |
ButtonReleaseMask, levptr(XEvent))) { |
598 |
|
599 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
600 |
&rootx, &rooty, &wx, &wy, &statemask)) |
601 |
break; /* on another screen */ |
602 |
|
603 |
if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) { |
604 |
sleep(1); |
605 |
lasttime++; |
606 |
continue; |
607 |
} |
608 |
#ifdef STEREO |
609 |
pushright(); |
610 |
glClear(GL_COLOR_BUFFER_BIT); |
611 |
draw_grids(); |
612 |
smUpdate(&vwright, qlevel); |
613 |
#ifdef DOBJ |
614 |
dobj_render(); |
615 |
#endif |
616 |
popright(); |
617 |
#endif |
618 |
glClear(GL_COLOR_BUFFER_BIT); |
619 |
draw_grids(); |
620 |
smUpdate(&odev.v, qlevel); |
621 |
#ifdef DOBJ |
622 |
dobj_render(); |
623 |
#endif |
624 |
glFlush(); |
625 |
checkglerr("moving view"); |
626 |
nframes++; |
627 |
thistime = time(0); |
628 |
if (thistime - lasttime >= 3 || |
629 |
nframes > (int)(3*3*TARGETFPS)) { |
630 |
qlevel = thistime<=lasttime ? 1000 : |
631 |
(int)((double)nframes/(thistime-lasttime) |
632 |
/ TARGETFPS * qlevel + 0.5); |
633 |
lasttime = thistime; nframes = 0; |
634 |
if (qlevel > 99) { |
635 |
if (qlevel > 300) { /* put on the brakes */ |
636 |
sleep(1); |
637 |
lasttime++; |
638 |
} |
639 |
qlevel = 99; |
640 |
} else if (qlevel < 1) |
641 |
qlevel = 1; |
642 |
} |
643 |
} |
644 |
if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */ |
645 |
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
646 |
wx = levptr(XButtonReleasedEvent)->x; |
647 |
wy = levptr(XButtonReleasedEvent)->y; |
648 |
moveview(wx, odev.vres-1-wy, movdir, movorb); |
649 |
} |
650 |
} |
651 |
|
652 |
|
653 |
static |
654 |
setglpersp(vp) /* set perspective view in GL */ |
655 |
register VIEW *vp; |
656 |
{ |
657 |
double d, xmin, xmax, ymin, ymax; |
658 |
|
659 |
if (mindpth >= maxdpth) { |
660 |
dev_zmin = 0.1; |
661 |
dev_zmax = 100.; |
662 |
} else { |
663 |
dev_zmin = 0.5*mindpth; |
664 |
dev_zmax = 1.5*maxdpth; |
665 |
if (dev_zmin > dev_zmax/100.) |
666 |
dev_zmin = dev_zmax/100.; |
667 |
} |
668 |
if (odev.v.vfore > FTINY) |
669 |
dev_zmin = odev.v.vfore; |
670 |
if (odev.v.vaft > FTINY) |
671 |
dev_zmax = odev.v.vaft; |
672 |
if (dev_zmin < dev_zmax/5000.) |
673 |
dev_zmin = dev_zmax/5000.; |
674 |
xmax = dev_zmin * tan(PI/180./2. * odev.v.horiz); |
675 |
xmin = -xmax; |
676 |
d = odev.v.hoff * (xmax - xmin); |
677 |
xmin += d; xmax += d; |
678 |
ymax = dev_zmin * tan(PI/180./2. * odev.v.vert); |
679 |
ymin = -ymax; |
680 |
d = odev.v.voff * (ymax - ymin); |
681 |
ymin += d; ymax += d; |
682 |
/* set view matrix */ |
683 |
glMatrixMode(GL_PROJECTION); |
684 |
glLoadIdentity(); |
685 |
glFrustum(xmin, xmax, ymin, ymax, dev_zmin, dev_zmax); |
686 |
gluLookAt(odev.v.vp[0], odev.v.vp[1], odev.v.vp[2], |
687 |
odev.v.vp[0] + odev.v.vdir[0], |
688 |
odev.v.vp[1] + odev.v.vdir[1], |
689 |
odev.v.vp[2] + odev.v.vdir[2], |
690 |
odev.v.vup[0], odev.v.vup[1], odev.v.vup[2]); |
691 |
} |
692 |
|
693 |
|
694 |
static |
695 |
wipeclean() /* prepare for redraw */ |
696 |
{ |
697 |
#ifdef STEREO |
698 |
setstereobuf(STEREO_BUFFER_RIGHT); |
699 |
glClear(GL_DEPTH_BUFFER_BIT); |
700 |
setstereobuf(STEREO_BUFFER_LEFT); |
701 |
#endif |
702 |
glClear(GL_DEPTH_BUFFER_BIT); |
703 |
smClean(); |
704 |
} |
705 |
|
706 |
|
707 |
static |
708 |
getkey(ekey) /* get input key */ |
709 |
register XKeyPressedEvent *ekey; |
710 |
{ |
711 |
int n; |
712 |
char buf[8]; |
713 |
|
714 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
715 |
if (n != 1) |
716 |
return; |
717 |
switch (buf[0]) { |
718 |
case 'h': /* turn on height motion lock */ |
719 |
headlocked = 1; |
720 |
return; |
721 |
case 'H': /* turn off height motion lock */ |
722 |
headlocked = 0; |
723 |
return; |
724 |
case 'l': /* retrieve last view */ |
725 |
inpresflags |= DFL(DC_LASTVIEW); |
726 |
return; |
727 |
case 'p': /* pause computation */ |
728 |
inpresflags |= DFL(DC_PAUSE); |
729 |
return; |
730 |
case 'v': /* spit out view */ |
731 |
inpresflags |= DFL(DC_GETVIEW); |
732 |
return; |
733 |
case '\n': |
734 |
case '\r': /* resume computation */ |
735 |
inpresflags |= DFL(DC_RESUME); |
736 |
return; |
737 |
case CTRL('R'): /* redraw screen */ |
738 |
wipeclean(); |
739 |
return; |
740 |
case CTRL('L'): /* refresh from server */ |
741 |
if (inpresflags & DFL(DC_REDRAW)) |
742 |
return; |
743 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
744 |
glDisable(GL_DEPTH_TEST); |
745 |
draw_grids(); |
746 |
#ifdef STEREO |
747 |
pushright(); |
748 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
749 |
draw_grids(); |
750 |
popright(); |
751 |
#endif |
752 |
glEnable(GL_DEPTH_TEST); |
753 |
glFlush(); |
754 |
smInit(rsL.max_samp); /* get rid of old values */ |
755 |
inpresflags |= DFL(DC_REDRAW); /* resend values from server */ |
756 |
rayqleft = 0; /* hold off update */ |
757 |
return; |
758 |
case 'K': /* kill rtrace process(es) */ |
759 |
inpresflags |= DFL(DC_KILL); |
760 |
break; |
761 |
case 'R': /* restart rtrace */ |
762 |
inpresflags |= DFL(DC_RESTART); |
763 |
break; |
764 |
case 'C': /* clobber holodeck */ |
765 |
inpresflags |= DFL(DC_CLOBBER); |
766 |
break; |
767 |
case 'q': /* quit the program */ |
768 |
inpresflags |= DFL(DC_QUIT); |
769 |
return; |
770 |
default: |
771 |
XBell(ourdisplay, 0); |
772 |
return; |
773 |
} |
774 |
} |
775 |
|
776 |
|
777 |
static |
778 |
fixwindow(eexp) /* repair damage to window */ |
779 |
register XExposeEvent *eexp; |
780 |
{ |
781 |
if (odev.hres == 0 | odev.vres == 0) { /* first exposure */ |
782 |
resizewindow((XConfigureEvent *)eexp); |
783 |
return; |
784 |
} |
785 |
if (eexp->count) /* wait for final exposure */ |
786 |
return; |
787 |
wipeclean(); /* clear depth */ |
788 |
} |
789 |
|
790 |
|
791 |
static |
792 |
resizewindow(ersz) /* resize window */ |
793 |
register XConfigureEvent *ersz; |
794 |
{ |
795 |
glViewport(0, 0, ersz->width, ersz->height); |
796 |
|
797 |
if (ersz->width == odev.hres && ersz->height == odev.vres) |
798 |
return; |
799 |
|
800 |
odev.hres = ersz->width; |
801 |
odev.vres = ersz->height; |
802 |
|
803 |
odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres); |
804 |
odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres); |
805 |
|
806 |
inpresflags |= DFL(DC_SETVIEW); |
807 |
} |