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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 |
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|
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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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|
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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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|
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#include "rhd_sample.h" |
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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 1024 /* 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 FRAMESTATE(s) (((s)&(ShiftMask|ControlMask))==(ShiftMask|ControlMask)) |
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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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char odev_args[64]; /* command arguments */ |
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|
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#ifdef STEREO |
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static VIEW vwright; /* right eye view */ |
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#endif |
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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(), getframe(), 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(INTERNAL, "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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checkglerr("setting rendering parameters"); |
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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) { |
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/* resize window? */ |
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if (!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 */ |
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dh -= 50; |
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#ifdef STEREO |
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dh /= 2; |
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#endif |
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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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} |
310 |
copystruct(&odev.v, nv); /* setview() already called */ |
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} |
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#ifdef STEREO |
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copystruct(&vwright, nv); |
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d = eyesepdist / sqrt(nv->hn2); |
315 |
VSUM(vwright.vp, nv->vp, nv->hvec, d); |
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/* setview(&vwright); -- Unnecessary */ |
317 |
#endif |
318 |
wipeclean(); |
319 |
return(1); |
320 |
} |
321 |
|
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|
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dev_section(gfn, pfn) /* add octree for geometry rendering */ |
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char *gfn, *pfn; |
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{ |
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/* unimplemented */ |
327 |
} |
328 |
|
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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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#ifdef DOBJ |
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if (dobj_command(cmd, args) >= 0) |
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return; |
336 |
#endif |
337 |
sprintf(errmsg, "%s: unknown command", cmd); |
338 |
error(COMMAND, errmsg); |
339 |
} |
340 |
|
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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; |
348 |
if (n == 0) |
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return(&odev.v); |
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#ifdef STEREO |
351 |
if (n == 1) |
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return(&vwright); |
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#endif |
354 |
return(NULL); |
355 |
} |
356 |
|
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|
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int |
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dev_input() /* get X11 input */ |
360 |
{ |
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inpresflags = 0; |
362 |
|
363 |
do |
364 |
getevent(); |
365 |
|
366 |
while (XPending(ourdisplay) > 0); |
367 |
|
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odev.inpready = 0; |
369 |
|
370 |
return(inpresflags); |
371 |
} |
372 |
|
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|
374 |
dev_value(c, d, p) /* add a pixel value to our mesh */ |
375 |
COLR c; |
376 |
FVECT d, p; |
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{ |
378 |
double depth; |
379 |
#ifdef DOBJ |
380 |
if (dobj_lightsamp != NULL) { /* in light source sampling */ |
381 |
(*dobj_lightsamp)(c, d, p); |
382 |
return; |
383 |
} |
384 |
#endif |
385 |
if (p != NULL) { /* add depth to our range */ |
386 |
depth = (p[0] - odev.v.vp[0])*d[0] + |
387 |
(p[1] - odev.v.vp[1])*d[1] + |
388 |
(p[2] - odev.v.vp[2])*d[2]; |
389 |
if (depth > FTINY) { |
390 |
if (depth < mindpth) |
391 |
mindpth = depth; |
392 |
if (depth > maxdpth) |
393 |
maxdpth = depth; |
394 |
} |
395 |
} |
396 |
smNewSamp(c, d, p); /* add to display representation */ |
397 |
if (!--rayqleft) |
398 |
dev_flush(); /* flush output */ |
399 |
} |
400 |
|
401 |
|
402 |
int |
403 |
dev_flush() /* flush output */ |
404 |
{ |
405 |
if (mapped) { |
406 |
#ifdef STEREO |
407 |
pushright(); /* update right eye */ |
408 |
smUpdate(&vwright, 100); |
409 |
#ifdef DOBJ |
410 |
dobj_render(); /* usually in foreground */ |
411 |
#endif |
412 |
popright(); /* update left eye */ |
413 |
#endif |
414 |
smUpdate(&odev.v, 100); |
415 |
checkglerr("rendering mesh"); |
416 |
#ifdef DOBJ |
417 |
dobj_render(); |
418 |
#endif |
419 |
glFlush(); /* flush OGL */ |
420 |
} |
421 |
rayqleft = RAYQLEN; |
422 |
/* flush X11 and return # pending */ |
423 |
return(odev.inpready = XPending(ourdisplay)); |
424 |
} |
425 |
|
426 |
|
427 |
checkglerr(where) /* check for GL or GLU error */ |
428 |
char *where; |
429 |
{ |
430 |
register GLenum errcode; |
431 |
|
432 |
while ((errcode = glGetError()) != GL_NO_ERROR) { |
433 |
sprintf(errmsg, "OpenGL error %s: %s", |
434 |
where, gluErrorString(errcode)); |
435 |
error(WARNING, errmsg); |
436 |
} |
437 |
} |
438 |
|
439 |
|
440 |
#ifdef STEREO |
441 |
static |
442 |
pushright() /* push on right view */ |
443 |
{ |
444 |
double d; |
445 |
|
446 |
setstereobuf(STEREO_BUFFER_RIGHT); |
447 |
glMatrixMode(GL_MODELVIEW); |
448 |
glPushMatrix(); |
449 |
d = -eyesepdist / sqrt(odev.v.hn2); |
450 |
glTranslated(d*odev.v.hvec[0], d*odev.v.hvec[1], d*odev.v.hvec[2]); |
451 |
checkglerr("setting right view"); |
452 |
} |
453 |
|
454 |
|
455 |
static |
456 |
popright() /* pop off right view */ |
457 |
{ |
458 |
glMatrixMode(GL_MODELVIEW); |
459 |
glPopMatrix(); |
460 |
setstereobuf(STEREO_BUFFER_LEFT); |
461 |
} |
462 |
#endif |
463 |
|
464 |
|
465 |
static int |
466 |
mytmflags() /* figure out tone mapping flags */ |
467 |
{ |
468 |
extern char *progname; |
469 |
register char *cp, *tail; |
470 |
/* find basic name */ |
471 |
for (cp = tail = progname; *cp; cp++) |
472 |
if (*cp == '/') |
473 |
tail = cp+1; |
474 |
for (cp = tail; *cp && *cp != '.'; cp++) |
475 |
; |
476 |
if (cp > tail && cp[-1] == 'h') |
477 |
return(TM_F_HUMAN|TM_F_NOSTDERR); |
478 |
else |
479 |
return(TM_F_CAMERA|TM_F_NOSTDERR); |
480 |
} |
481 |
|
482 |
|
483 |
static |
484 |
getevent() /* get next event */ |
485 |
{ |
486 |
XNextEvent(ourdisplay, levptr(XEvent)); |
487 |
switch (levptr(XEvent)->type) { |
488 |
case ConfigureNotify: |
489 |
resizewindow(levptr(XConfigureEvent)); |
490 |
break; |
491 |
case UnmapNotify: |
492 |
mapped = 0; |
493 |
break; |
494 |
case MapNotify: |
495 |
mapped = 1; |
496 |
break; |
497 |
case Expose: |
498 |
fixwindow(levptr(XExposeEvent)); |
499 |
break; |
500 |
case KeyPress: |
501 |
getkey(levptr(XKeyPressedEvent)); |
502 |
break; |
503 |
case ButtonPress: |
504 |
if (FRAMESTATE(levptr(XButtonPressedEvent)->state)) |
505 |
getframe(levptr(XButtonPressedEvent)); |
506 |
else |
507 |
getmove(levptr(XButtonPressedEvent)); |
508 |
break; |
509 |
} |
510 |
} |
511 |
|
512 |
|
513 |
static |
514 |
draw3dline(wp) /* draw 3d line in world coordinates */ |
515 |
register FVECT wp[2]; |
516 |
{ |
517 |
glVertex3d(wp[0][0], wp[0][1], wp[0][2]); |
518 |
glVertex3d(wp[1][0], wp[1][1], wp[1][2]); |
519 |
} |
520 |
|
521 |
|
522 |
static |
523 |
draw_grids(fore) /* draw holodeck section grids */ |
524 |
int fore; |
525 |
{ |
526 |
if (fore) |
527 |
glColor4ub(0, 255, 255, 0); |
528 |
else |
529 |
glColor4ub(0, 0, 0, 0); |
530 |
glBegin(GL_LINES); /* draw each grid line */ |
531 |
gridlines(draw3dline); |
532 |
glEnd(); |
533 |
checkglerr("drawing grid lines"); |
534 |
} |
535 |
|
536 |
|
537 |
static |
538 |
moveview(dx, dy, mov, orb) /* move our view */ |
539 |
int dx, dy, mov, orb; |
540 |
{ |
541 |
VIEW nv; |
542 |
FVECT odir, v1, wip; |
543 |
double d; |
544 |
register int li; |
545 |
/* start with old view */ |
546 |
copystruct(&nv, &odev.v); |
547 |
/* orient our motion */ |
548 |
if (viewray(v1, odir, &odev.v, |
549 |
(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY) |
550 |
return(0); /* outside view */ |
551 |
if (mov | orb) { /* moving relative to geometry */ |
552 |
#ifdef DOBJ |
553 |
d = dobj_trace(NULL, v1, odir); /* check objects */ |
554 |
/* check holodeck */ |
555 |
if ((li = smFindSamp(v1, odir)) >= 0) { |
556 |
VCOPY(wip, rsL.wp[li]); |
557 |
if (d < .99*FHUGE && d*d <= dist2(v1, wip)) |
558 |
li = -1; /* object is closer */ |
559 |
} else if (d >= .99*FHUGE) |
560 |
return(0); /* nothing visible */ |
561 |
if (li < 0) |
562 |
VSUM(wip, v1, odir, d); /* else get object point */ |
563 |
#else |
564 |
if ((li = smFindSamp(v1, odir)) < 0) |
565 |
return(0); /* not on window */ |
566 |
VCOPY(wip, rsL.wp[li]); |
567 |
#endif |
568 |
#ifdef DEBUG |
569 |
fprintf(stderr, "moveview: hit %s at (%f,%f,%f) (t=%f)\n", |
570 |
li < 0 ? "object" : "mesh", |
571 |
wip[0], wip[1], wip[2], |
572 |
(wip[0]-odev.v.vp[0])*odir[0] + |
573 |
(wip[1]-odev.v.vp[1])*odir[1] + |
574 |
(wip[2]-odev.v.vp[2])*odir[2]); |
575 |
#endif |
576 |
VSUM(odir, wip, odev.v.vp, -1.); |
577 |
} else /* panning with constant viewpoint */ |
578 |
VCOPY(nv.vdir, odir); |
579 |
if (orb && mov) { /* orbit left/right */ |
580 |
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov); |
581 |
VSUM(nv.vp, wip, odir, -1.); |
582 |
spinvector(nv.vdir, nv.vdir, nv.vup, d); |
583 |
} else if (orb) { /* orbit up/down */ |
584 |
fcross(v1, odir, nv.vup); |
585 |
if (normalize(v1) == 0.) |
586 |
return(0); |
587 |
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb); |
588 |
VSUM(nv.vp, wip, odir, -1.); |
589 |
spinvector(nv.vdir, nv.vdir, v1, d); |
590 |
} else if (mov) { /* move forward/backward */ |
591 |
d = MOVPCT/100. * mov; |
592 |
VSUM(nv.vp, nv.vp, odir, d); |
593 |
} |
594 |
if (!mov ^ !orb && headlocked) { /* restore head height */ |
595 |
VSUM(v1, odev.v.vp, nv.vp, -1.); |
596 |
d = DOT(v1, nv.vup); |
597 |
VSUM(nv.vp, nv.vp, odev.v.vup, d); |
598 |
} |
599 |
if (setview(&nv) != NULL) |
600 |
return(0); /* illegal view */ |
601 |
dev_view(&nv); |
602 |
inpresflags |= DFL(DC_SETVIEW); |
603 |
return(1); |
604 |
} |
605 |
|
606 |
|
607 |
static |
608 |
getframe(ebut) /* get focus frame */ |
609 |
XButtonPressedEvent *ebut; |
610 |
{ |
611 |
int startx = ebut->x, starty = ebut->y; |
612 |
int endx, endy; |
613 |
|
614 |
XMaskEvent(ourdisplay, ButtonReleaseMask, levptr(XEvent)); |
615 |
endx = levptr(XButtonReleasedEvent)->x; |
616 |
endy = levptr(XButtonReleasedEvent)->y; |
617 |
if (endx == startx | endy == starty) { |
618 |
XBell(ourdisplay, 0); |
619 |
return; |
620 |
} |
621 |
if (endx < startx) {register int c = endx; endx = startx; startx = c;} |
622 |
if (endy < starty) {register int c = endy; endy = starty; starty = c;} |
623 |
sprintf(odev_args, "%.3f %.3f %.3f %.3f", |
624 |
(startx+.5)/odev.hres, 1.-(endy+.5)/odev.vres, |
625 |
(endx+.5)/odev.hres, 1.-(starty+.5)/odev.vres); |
626 |
inpresflags |= DFL(DC_FOCUS); |
627 |
} |
628 |
|
629 |
|
630 |
static |
631 |
getmove(ebut) /* get view change */ |
632 |
XButtonPressedEvent *ebut; |
633 |
{ |
634 |
int movdir = MOVDIR(ebut->button); |
635 |
int movorb = MOVORB(ebut->state); |
636 |
int qlevel = 99; |
637 |
time_t lasttime, thistime; |
638 |
int nframes; |
639 |
Window rootw, childw; |
640 |
int rootx, rooty, wx, wy; |
641 |
unsigned int statemask; |
642 |
|
643 |
XNoOp(ourdisplay); /* makes sure we're not idle */ |
644 |
|
645 |
lasttime = time(0); nframes = 0; |
646 |
while (!XCheckMaskEvent(ourdisplay, |
647 |
ButtonReleaseMask, levptr(XEvent))) { |
648 |
/* get cursor position */ |
649 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
650 |
&rootx, &rooty, &wx, &wy, &statemask)) |
651 |
break; /* on another screen */ |
652 |
|
653 |
draw_grids(0); /* clear old grid lines */ |
654 |
#ifdef STEREO |
655 |
pushright(); draw_grids(0); popright(); |
656 |
#endif |
657 |
/* compute view motion */ |
658 |
if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) { |
659 |
sleep(1); |
660 |
lasttime++; |
661 |
continue; /* cursor in bad place */ |
662 |
} |
663 |
draw_grids(1); /* redraw grid */ |
664 |
#ifdef STEREO |
665 |
pushright(); |
666 |
draw_grids(1); |
667 |
smUpdate(&vwright, qlevel); |
668 |
#ifdef DOBJ |
669 |
dobj_render(); |
670 |
#endif |
671 |
popright(); |
672 |
#endif |
673 |
/* redraw mesh */ |
674 |
smUpdate(&odev.v, qlevel); |
675 |
#ifdef DOBJ |
676 |
dobj_render(); /* redraw object */ |
677 |
#endif |
678 |
glFlush(); |
679 |
nframes++; /* figure out good quality level */ |
680 |
thistime = time(0); |
681 |
if (thistime - lasttime >= 3 || |
682 |
nframes > (int)(3*3*TARGETFPS)) { |
683 |
qlevel = thistime<=lasttime ? 1000 : |
684 |
(int)((double)nframes/(thistime-lasttime) |
685 |
/ TARGETFPS * qlevel + 0.5); |
686 |
lasttime = thistime; nframes = 0; |
687 |
if (qlevel > 99) { |
688 |
if (qlevel > 300) { /* put on the brakes */ |
689 |
sleep(1); |
690 |
lasttime++; |
691 |
} |
692 |
qlevel = 99; |
693 |
} else if (qlevel < 1) |
694 |
qlevel = 1; |
695 |
} |
696 |
} |
697 |
if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */ |
698 |
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
699 |
wx = levptr(XButtonReleasedEvent)->x; |
700 |
wy = levptr(XButtonReleasedEvent)->y; |
701 |
moveview(wx, odev.vres-1-wy, movdir, movorb); |
702 |
} |
703 |
} |
704 |
|
705 |
|
706 |
static |
707 |
setglpersp(vp) /* set perspective view in GL */ |
708 |
register VIEW *vp; |
709 |
{ |
710 |
double d, xmin, xmax, ymin, ymax; |
711 |
|
712 |
if (mindpth >= maxdpth) { |
713 |
dev_zmin = 1.; |
714 |
dev_zmax = 100.; |
715 |
} else { |
716 |
dev_zmin = 0.5*mindpth; |
717 |
dev_zmax = 5.0*maxdpth; |
718 |
} |
719 |
if (odev.v.vfore > FTINY) |
720 |
dev_zmin = odev.v.vfore; |
721 |
if (odev.v.vaft > FTINY) |
722 |
dev_zmax = odev.v.vaft; |
723 |
if (dev_zmin < dev_zmax/100.) |
724 |
dev_zmin = dev_zmax/100.; |
725 |
xmax = dev_zmin * tan(PI/180./2. * odev.v.horiz); |
726 |
xmin = -xmax; |
727 |
d = odev.v.hoff * (xmax - xmin); |
728 |
xmin += d; xmax += d; |
729 |
ymax = dev_zmin * tan(PI/180./2. * odev.v.vert); |
730 |
ymin = -ymax; |
731 |
d = odev.v.voff * (ymax - ymin); |
732 |
ymin += d; ymax += d; |
733 |
/* set view matrix */ |
734 |
glMatrixMode(GL_PROJECTION); |
735 |
glLoadIdentity(); |
736 |
glFrustum(xmin, xmax, ymin, ymax, dev_zmin, dev_zmax); |
737 |
gluLookAt(odev.v.vp[0], odev.v.vp[1], odev.v.vp[2], |
738 |
odev.v.vp[0] + odev.v.vdir[0], |
739 |
odev.v.vp[1] + odev.v.vdir[1], |
740 |
odev.v.vp[2] + odev.v.vdir[2], |
741 |
odev.v.vup[0], odev.v.vup[1], odev.v.vup[2]); |
742 |
checkglerr("setting perspective view"); |
743 |
} |
744 |
|
745 |
|
746 |
static |
747 |
wipeclean() /* prepare for redraw */ |
748 |
{ |
749 |
/* clear depth buffer */ |
750 |
#ifdef STEREO |
751 |
setstereobuf(STEREO_BUFFER_RIGHT); |
752 |
glClear(GL_DEPTH_BUFFER_BIT); |
753 |
setstereobuf(STEREO_BUFFER_LEFT); |
754 |
#endif |
755 |
glClear(GL_DEPTH_BUFFER_BIT); |
756 |
smClean(); /* reset drawing routines */ |
757 |
setglpersp(&odev.v); /* reset view & clipping planes */ |
758 |
} |
759 |
|
760 |
|
761 |
static |
762 |
getkey(ekey) /* get input key */ |
763 |
register XKeyPressedEvent *ekey; |
764 |
{ |
765 |
Window rootw, childw; |
766 |
int rootx, rooty, wx, wy; |
767 |
unsigned int statemask; |
768 |
int n; |
769 |
char buf[8]; |
770 |
|
771 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
772 |
if (n != 1) |
773 |
return; |
774 |
switch (buf[0]) { |
775 |
case 'h': /* turn on height motion lock */ |
776 |
headlocked = 1; |
777 |
return; |
778 |
case 'H': /* turn off height motion lock */ |
779 |
headlocked = 0; |
780 |
return; |
781 |
case 'l': /* retrieve last view */ |
782 |
inpresflags |= DFL(DC_LASTVIEW); |
783 |
return; |
784 |
case 'p': /* pause computation */ |
785 |
inpresflags |= DFL(DC_PAUSE); |
786 |
return; |
787 |
case 'v': /* spit out view */ |
788 |
inpresflags |= DFL(DC_GETVIEW); |
789 |
return; |
790 |
case 'f': /* frame view position */ |
791 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
792 |
&rootx, &rooty, &wx, &wy, &statemask)) |
793 |
return; /* on another screen */ |
794 |
sprintf(odev_args, "%.4f %.4f", (wx+.5)/odev.hres, |
795 |
1.-(wy+.5)/odev.vres); |
796 |
inpresflags |= DFL(DC_FOCUS); |
797 |
return; |
798 |
case 'F': /* unfocus */ |
799 |
odev_args[0] = '\0'; |
800 |
inpresflags |= DFL(DC_FOCUS); |
801 |
return; |
802 |
case '\n': |
803 |
case '\r': /* resume computation */ |
804 |
inpresflags |= DFL(DC_RESUME); |
805 |
return; |
806 |
case CTRL('R'): /* redraw screen */ |
807 |
wipeclean(); |
808 |
return; |
809 |
case CTRL('L'): /* refresh from server */ |
810 |
if (inpresflags & DFL(DC_REDRAW)) |
811 |
return; |
812 |
setglpersp(&odev.v); /* reset clipping planes */ |
813 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
814 |
glDisable(GL_DEPTH_TEST); /* so grids will clear */ |
815 |
draw_grids(1); |
816 |
#ifdef STEREO |
817 |
pushright(); |
818 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
819 |
draw_grids(1); |
820 |
popright(); |
821 |
#endif |
822 |
glEnable(GL_DEPTH_TEST); |
823 |
glFlush(); |
824 |
smInit(rsL.max_samp); /* get rid of old values */ |
825 |
inpresflags |= DFL(DC_REDRAW); /* resend values from server */ |
826 |
rayqleft = 0; /* hold off update */ |
827 |
return; |
828 |
case 'K': /* kill rtrace process(es) */ |
829 |
inpresflags |= DFL(DC_KILL); |
830 |
break; |
831 |
case 'R': /* restart rtrace */ |
832 |
inpresflags |= DFL(DC_RESTART); |
833 |
break; |
834 |
case 'C': /* clobber holodeck */ |
835 |
inpresflags |= DFL(DC_CLOBBER); |
836 |
break; |
837 |
case 'q': /* quit the program */ |
838 |
inpresflags |= DFL(DC_QUIT); |
839 |
return; |
840 |
default: |
841 |
XBell(ourdisplay, 0); |
842 |
return; |
843 |
} |
844 |
} |
845 |
|
846 |
|
847 |
static |
848 |
fixwindow(eexp) /* repair damage to window */ |
849 |
register XExposeEvent *eexp; |
850 |
{ |
851 |
if (odev.hres == 0 | odev.vres == 0) { /* first exposure */ |
852 |
resizewindow((XConfigureEvent *)eexp); |
853 |
return; |
854 |
} |
855 |
if (eexp->count) /* wait for final exposure */ |
856 |
return; |
857 |
wipeclean(); /* clear depth */ |
858 |
} |
859 |
|
860 |
|
861 |
static |
862 |
resizewindow(ersz) /* resize window */ |
863 |
register XConfigureEvent *ersz; |
864 |
{ |
865 |
glViewport(0, 0, ersz->width, ersz->height); |
866 |
|
867 |
if (ersz->width == odev.hres && ersz->height == odev.vres) |
868 |
return; |
869 |
|
870 |
odev.hres = ersz->width; |
871 |
odev.vres = ersz->height; |
872 |
|
873 |
odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres); |
874 |
odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres); |
875 |
|
876 |
inpresflags |= DFL(DC_SETVIEW); |
877 |
} |