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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
| 2 |
|
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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 driver for holodeck display. |
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* Based on GLX driver using T-mesh. |
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* |
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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> |
| 30 |
#endif |
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|
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#include "rhd_odraw.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 10240 /* 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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#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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static GLfloat *depthbuffer = NULL; /* depth buffer */ |
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|
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#ifdef STEREO |
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static VIEW vwright; /* right eye view */ |
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static GLfloat *depthright = NULL; /* right depth buffer */ |
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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 dev_zmin, dev_zmax; /* fore and aft clipping plane dist. */ |
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static double dev_zrat; /* (1. - dev_zmin/dev_zmax) */ |
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|
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#define setzrat() (dev_zrat = 1. - dev_zmin/dev_zmax) |
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#define mapdepth(d) ((d)>0.9995 ? FHUGE : dev_zmin/(1.-(d)*dev_zrat)) |
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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; /* lock vertical motion */ |
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|
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static int isperspective; /* perspective/ortho view */ |
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|
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static int viewsteady; /* is view steady? */ |
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|
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static int resizewindow(), getevent(), getkey(), moveview(), wipeclean(), |
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xferdepth(), setglortho(), |
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setglpersp(), getframe(), getmove(), fixwindow(), mytmflags(); |
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|
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static double getdistance(); |
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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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glDisable(GL_DITHER); |
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glFrontFace(GL_CCW); |
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glDisable(GL_CULL_FACE); |
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glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE); |
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
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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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headlocked = 0; /* free up head movement */ |
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viewsteady = 1; /* view starts static */ |
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isperspective = -1; /* but no view set, yet */ |
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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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if (!odInit(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.firstuse = 1; /* can't recycle samples */ |
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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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#ifdef DOBJ |
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dobj_cleanup(); |
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#endif |
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odDone(); |
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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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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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} |
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copystruct(&odev.v, nv); /* setview() already called */ |
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#ifdef STEREO |
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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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#endif |
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} else |
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viewsteady = 1; |
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wipeclean(); |
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return(1); |
| 332 |
} |
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|
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|
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dev_section(ofn) /* add octree for geometry rendering */ |
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char *ofn; |
| 337 |
{ |
| 338 |
extern char *index(); |
| 339 |
char *cp; |
| 340 |
|
| 341 |
if (ofn == NULL) |
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otEndOctree(); |
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else if (access(ofn, R_OK) == 0) |
| 344 |
otNewOctree(ofn); |
| 345 |
#ifdef DEBUG |
| 346 |
else { |
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sprintf(errmsg, "cannot load octree \"%s\"", ofn); |
| 348 |
error(WARNING, errmsg); |
| 349 |
} |
| 350 |
#endif |
| 351 |
} |
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|
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|
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dev_auxcom(cmd, args) /* process an auxiliary command */ |
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char *cmd, *args; |
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{ |
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#ifdef DOBJ |
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if (dobj_command(cmd, args) >= 0) |
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return; |
| 360 |
#endif |
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sprintf(errmsg, "%s: unknown command", cmd); |
| 362 |
error(COMMAND, errmsg); |
| 363 |
} |
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|
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|
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VIEW * |
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dev_auxview(n, hvres) /* return nth auxiliary view */ |
| 368 |
int n; |
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int hvres[2]; |
| 370 |
{ |
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hvres[0] = odev.hres; hvres[1] = odev.vres; |
| 372 |
if (n == 0) |
| 373 |
return(&odev.v); |
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#ifdef STEREO |
| 375 |
if (n == 1) |
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return(&vwright); |
| 377 |
#endif |
| 378 |
return(NULL); |
| 379 |
} |
| 380 |
|
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|
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int |
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dev_input() /* get X11 input */ |
| 384 |
{ |
| 385 |
inpresflags = 0; |
| 386 |
|
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do |
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getevent(); |
| 389 |
|
| 390 |
while (XPending(ourdisplay) > 0); |
| 391 |
|
| 392 |
odev.inpready = 0; |
| 393 |
|
| 394 |
return(inpresflags); |
| 395 |
} |
| 396 |
|
| 397 |
|
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dev_value(c, d, p) /* add a pixel value to our texture */ |
| 399 |
COLR c; |
| 400 |
FVECT d, p; |
| 401 |
{ |
| 402 |
#ifdef DOBJ |
| 403 |
if (dobj_lightsamp != NULL) { /* in light source sampling */ |
| 404 |
(*dobj_lightsamp)(c, d, p); |
| 405 |
return; |
| 406 |
} |
| 407 |
#endif |
| 408 |
odSample(c, d, p); /* add to display representation */ |
| 409 |
if (!--rayqleft) |
| 410 |
dev_flush(); /* flush output */ |
| 411 |
} |
| 412 |
|
| 413 |
|
| 414 |
int |
| 415 |
dev_flush() /* flush output as appropriate */ |
| 416 |
{ |
| 417 |
int ndrawn; |
| 418 |
|
| 419 |
if (mapped && isperspective > 0) { |
| 420 |
#ifdef STEREO |
| 421 |
pushright(); /* draw right eye */ |
| 422 |
otDrawOctrees(); |
| 423 |
#ifdef DOBJ |
| 424 |
dobj_render(); |
| 425 |
#endif |
| 426 |
checkglerr("rendering right eye"); |
| 427 |
popright(); /* draw left eye */ |
| 428 |
#endif |
| 429 |
ndrawn = otDrawOctrees(); |
| 430 |
#ifdef DOBJ |
| 431 |
ndrawn += dobj_render(); |
| 432 |
#endif |
| 433 |
checkglerr("rendering base view"); |
| 434 |
} |
| 435 |
if (mapped && viewsteady) { |
| 436 |
if (isperspective) { /* first time after steady */ |
| 437 |
#ifdef STEREO |
| 438 |
pushright(); |
| 439 |
popright(); |
| 440 |
#endif |
| 441 |
if (ndrawn) |
| 442 |
xferdepth(); /* transfer and clear depth */ |
| 443 |
setglortho(); /* set orthographic view */ |
| 444 |
} else { |
| 445 |
#ifdef STEREO |
| 446 |
pushright(); |
| 447 |
odUpdate(1); /* draw right eye */ |
| 448 |
popright(); |
| 449 |
#endif |
| 450 |
odUpdate(0); /* draw left eye */ |
| 451 |
} |
| 452 |
} |
| 453 |
glFlush(); /* flush OpenGL */ |
| 454 |
rayqleft = RAYQLEN; |
| 455 |
/* flush X11 and return # pending */ |
| 456 |
return(odev.inpready = XPending(ourdisplay)); |
| 457 |
} |
| 458 |
|
| 459 |
|
| 460 |
checkglerr(where) /* check for GL or GLU error */ |
| 461 |
char *where; |
| 462 |
{ |
| 463 |
register GLenum errcode; |
| 464 |
|
| 465 |
while ((errcode = glGetError()) != GL_NO_ERROR) { |
| 466 |
sprintf(errmsg, "OpenGL error %s: %s", |
| 467 |
where, gluErrorString(errcode)); |
| 468 |
error(WARNING, errmsg); |
| 469 |
} |
| 470 |
} |
| 471 |
|
| 472 |
|
| 473 |
static |
| 474 |
xferdepth() /* load and clear depth buffer */ |
| 475 |
{ |
| 476 |
register GLfloat *dbp; |
| 477 |
|
| 478 |
if (depthbuffer == NULL) { |
| 479 |
#ifdef STEREO |
| 480 |
depthright = (GLfloat *)malloc( |
| 481 |
odev.hres*odev.vres*sizeof(GLfloat)); |
| 482 |
#endif |
| 483 |
depthbuffer = (GLfloat *)malloc( |
| 484 |
odev.hres*odev.vres*sizeof(GLfloat)); |
| 485 |
if (depthbuffer == NULL) |
| 486 |
error(SYSTEM, "out of memory in xferdepth"); |
| 487 |
} |
| 488 |
#ifdef STEREO |
| 489 |
setstereobuf(STEREO_BUFFER_RIGHT); |
| 490 |
glReadPixels(0, 0, odev.hres, odev.vres, |
| 491 |
GL_DEPTH_COMPONENT, GL_FLOAT, depthright); |
| 492 |
setstereobuf(STEREO_BUFFER_LEFT); |
| 493 |
for (dbp = depthright + odev.hres*odev.vres; dbp-- > depthright; ) |
| 494 |
*dbp = mapdepth(*dbp); |
| 495 |
odDepthMap(1, depthright); |
| 496 |
glClear(GL_DEPTH_BUFFER_BIT); |
| 497 |
#endif |
| 498 |
glReadPixels(0, 0, odev.hres, odev.vres, |
| 499 |
GL_DEPTH_COMPONENT, GL_FLOAT, depthbuffer); |
| 500 |
for (dbp = depthbuffer + odev.hres*odev.vres; dbp-- > depthbuffer; ) |
| 501 |
*dbp = mapdepth(*dbp); |
| 502 |
odDepthMap(0, depthbuffer); /* transfer depth data */ |
| 503 |
glClear(GL_DEPTH_BUFFER_BIT); /* clear system buffer */ |
| 504 |
} |
| 505 |
|
| 506 |
|
| 507 |
static double |
| 508 |
getdistance(dx, dy, direc) /* distance from fore plane along view ray */ |
| 509 |
int dx, dy; |
| 510 |
FVECT direc; |
| 511 |
{ |
| 512 |
GLfloat gldepth; |
| 513 |
double dist; |
| 514 |
|
| 515 |
if (dx<0 | dx>=odev.hres | dy<0 | dy>=odev.vres) |
| 516 |
return(FHUGE); |
| 517 |
if (depthbuffer != NULL) |
| 518 |
dist = depthbuffer[dy*odev.hres + dx]; |
| 519 |
else { |
| 520 |
glReadPixels(dx,dy, 1,1, GL_DEPTH_COMPONENT, |
| 521 |
GL_FLOAT, &gldepth); |
| 522 |
dist = mapdepth(gldepth); |
| 523 |
} |
| 524 |
if (dist >= .99*FHUGE) |
| 525 |
return(FHUGE); |
| 526 |
return((dist-odev.v.vfore)/DOT(direc,odev.v.vdir)); |
| 527 |
} |
| 528 |
|
| 529 |
|
| 530 |
#ifdef STEREO |
| 531 |
static |
| 532 |
pushright() /* push on right view & buffer */ |
| 533 |
{ |
| 534 |
double d; |
| 535 |
|
| 536 |
setstereobuf(STEREO_BUFFER_RIGHT); |
| 537 |
if (isperspective > 0) { |
| 538 |
glMatrixMode(GL_MODELVIEW); |
| 539 |
glPushMatrix(); |
| 540 |
d = -eyesepdist / sqrt(odev.v.hn2); |
| 541 |
glTranslated(d*odev.v.hvec[0], d*odev.v.hvec[1], |
| 542 |
d*odev.v.hvec[2]); |
| 543 |
checkglerr("setting right view"); |
| 544 |
} |
| 545 |
} |
| 546 |
|
| 547 |
|
| 548 |
static |
| 549 |
popright() /* pop off right view & buffer */ |
| 550 |
{ |
| 551 |
if (isperspective > 0) { |
| 552 |
glMatrixMode(GL_MODELVIEW); |
| 553 |
glPopMatrix(); |
| 554 |
} |
| 555 |
setstereobuf(STEREO_BUFFER_LEFT); |
| 556 |
} |
| 557 |
#endif |
| 558 |
|
| 559 |
|
| 560 |
static int |
| 561 |
mytmflags() /* figure out tone mapping flags */ |
| 562 |
{ |
| 563 |
extern char *progname; |
| 564 |
register char *cp, *tail; |
| 565 |
/* find basic name */ |
| 566 |
for (cp = tail = progname; *cp; cp++) |
| 567 |
if (*cp == '/') |
| 568 |
tail = cp+1; |
| 569 |
for (cp = tail; *cp && *cp != '.'; cp++) |
| 570 |
; |
| 571 |
#ifdef DEBUG |
| 572 |
if (cp > tail && cp[-1] == 'h') |
| 573 |
return(TM_F_HUMAN); |
| 574 |
else |
| 575 |
return(TM_F_CAMERA); |
| 576 |
#else |
| 577 |
if (cp > tail && cp[-1] == 'h') |
| 578 |
return(TM_F_HUMAN|TM_F_NOSTDERR); |
| 579 |
else |
| 580 |
return(TM_F_CAMERA|TM_F_NOSTDERR); |
| 581 |
#endif |
| 582 |
} |
| 583 |
|
| 584 |
|
| 585 |
static |
| 586 |
getevent() /* get next event */ |
| 587 |
{ |
| 588 |
XNextEvent(ourdisplay, levptr(XEvent)); |
| 589 |
switch (levptr(XEvent)->type) { |
| 590 |
case ConfigureNotify: |
| 591 |
resizewindow(levptr(XConfigureEvent)); |
| 592 |
break; |
| 593 |
case UnmapNotify: |
| 594 |
mapped = 0; |
| 595 |
break; |
| 596 |
case MapNotify: |
| 597 |
mapped = 1; |
| 598 |
break; |
| 599 |
case Expose: |
| 600 |
fixwindow(levptr(XExposeEvent)); |
| 601 |
break; |
| 602 |
case KeyPress: |
| 603 |
getkey(levptr(XKeyPressedEvent)); |
| 604 |
break; |
| 605 |
case ButtonPress: |
| 606 |
if (FRAMESTATE(levptr(XButtonPressedEvent)->state)) |
| 607 |
getframe(levptr(XButtonPressedEvent)); |
| 608 |
else |
| 609 |
getmove(levptr(XButtonPressedEvent)); |
| 610 |
break; |
| 611 |
} |
| 612 |
} |
| 613 |
|
| 614 |
|
| 615 |
static |
| 616 |
draw3dline(wp) /* draw 3d line in world coordinates */ |
| 617 |
register FVECT wp[2]; |
| 618 |
{ |
| 619 |
glVertex3d(wp[0][0], wp[0][1], wp[0][2]); |
| 620 |
glVertex3d(wp[1][0], wp[1][1], wp[1][2]); |
| 621 |
} |
| 622 |
|
| 623 |
|
| 624 |
static |
| 625 |
draw_grids(fore) /* draw holodeck section grids */ |
| 626 |
int fore; |
| 627 |
{ |
| 628 |
glPushAttrib(GL_LIGHTING_BIT|GL_ENABLE_BIT); |
| 629 |
glDisable(GL_LIGHTING); |
| 630 |
if (fore) |
| 631 |
glColor3ub(0, 255, 255); |
| 632 |
else |
| 633 |
glColor3ub(0, 0, 0); |
| 634 |
glBegin(GL_LINES); /* draw each grid line */ |
| 635 |
gridlines(draw3dline); |
| 636 |
glEnd(); |
| 637 |
checkglerr("drawing grid lines"); |
| 638 |
glPopAttrib(); |
| 639 |
} |
| 640 |
|
| 641 |
|
| 642 |
static |
| 643 |
moveview(dx, dy, mov, orb) /* move our view */ |
| 644 |
int dx, dy, mov, orb; |
| 645 |
{ |
| 646 |
VIEW nv; |
| 647 |
FVECT odir, v1, wip; |
| 648 |
double d, d1; |
| 649 |
register int li; |
| 650 |
/* start with old view */ |
| 651 |
copystruct(&nv, &odev.v); |
| 652 |
/* orient our motion */ |
| 653 |
if (viewray(v1, odir, &odev.v, |
| 654 |
(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY) |
| 655 |
return(0); /* outside view */ |
| 656 |
if (mov | orb) { /* moving relative to geometry */ |
| 657 |
d = getdistance(dx, dy, odir); /* distance from front plane */ |
| 658 |
#ifdef DOBJ |
| 659 |
d1 = dobj_trace(NULL, v1, odir); |
| 660 |
if (d1 < d) |
| 661 |
d = d1; |
| 662 |
#endif |
| 663 |
if (d >= .99*FHUGE) |
| 664 |
d = 0.5*(dev_zmax+dev_zmin); /* just guess */ |
| 665 |
VSUM(wip, v1, odir, d); |
| 666 |
VSUB(odir, wip, odev.v.vp); |
| 667 |
} else /* panning with constant viewpoint */ |
| 668 |
VCOPY(nv.vdir, odir); |
| 669 |
if (orb && mov) { /* orbit left/right */ |
| 670 |
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov); |
| 671 |
VSUM(nv.vp, wip, odir, -1.); |
| 672 |
spinvector(nv.vdir, nv.vdir, nv.vup, d); |
| 673 |
} else if (orb) { /* orbit up/down */ |
| 674 |
fcross(v1, odir, nv.vup); |
| 675 |
if (normalize(v1) == 0.) |
| 676 |
return(0); |
| 677 |
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb); |
| 678 |
VSUM(nv.vp, wip, odir, -1.); |
| 679 |
spinvector(nv.vdir, nv.vdir, v1, d); |
| 680 |
} else if (mov) { /* move forward/backward */ |
| 681 |
d = MOVPCT/100. * mov; |
| 682 |
VSUM(nv.vp, nv.vp, odir, d); |
| 683 |
} |
| 684 |
if (!mov ^ !orb && headlocked) { /* restore head height */ |
| 685 |
VSUM(v1, odev.v.vp, nv.vp, -1.); |
| 686 |
d = DOT(v1, nv.vup); |
| 687 |
VSUM(nv.vp, nv.vp, odev.v.vup, d); |
| 688 |
} |
| 689 |
if (setview(&nv) != NULL) |
| 690 |
return(0); /* illegal view */ |
| 691 |
dev_view(&nv); |
| 692 |
inpresflags |= DFL(DC_SETVIEW)|DFL(DC_REDRAW); |
| 693 |
return(1); |
| 694 |
} |
| 695 |
|
| 696 |
|
| 697 |
static |
| 698 |
getframe(ebut) /* get focus frame */ |
| 699 |
XButtonPressedEvent *ebut; |
| 700 |
{ |
| 701 |
int startx = ebut->x, starty = ebut->y; |
| 702 |
int endx, endy; |
| 703 |
|
| 704 |
XMaskEvent(ourdisplay, ButtonReleaseMask, levptr(XEvent)); |
| 705 |
endx = levptr(XButtonReleasedEvent)->x; |
| 706 |
endy = levptr(XButtonReleasedEvent)->y; |
| 707 |
if (endx == startx | endy == starty) { |
| 708 |
XBell(ourdisplay, 0); |
| 709 |
return; |
| 710 |
} |
| 711 |
if (endx < startx) {register int c = endx; endx = startx; startx = c;} |
| 712 |
if (endy < starty) {register int c = endy; endy = starty; starty = c;} |
| 713 |
sprintf(odev_args, "%.3f %.3f %.3f %.3f", |
| 714 |
(startx+.5)/odev.hres, 1.-(endy+.5)/odev.vres, |
| 715 |
(endx+.5)/odev.hres, 1.-(starty+.5)/odev.vres); |
| 716 |
inpresflags |= DFL(DC_FOCUS); |
| 717 |
} |
| 718 |
|
| 719 |
|
| 720 |
static |
| 721 |
getmove(ebut) /* get view change */ |
| 722 |
XButtonPressedEvent *ebut; |
| 723 |
{ |
| 724 |
int movdir = MOVDIR(ebut->button); |
| 725 |
int movorb = MOVORB(ebut->state); |
| 726 |
Window rootw, childw; |
| 727 |
int rootx, rooty, wx, wy; |
| 728 |
unsigned int statemask; |
| 729 |
|
| 730 |
XNoOp(ourdisplay); /* makes sure we're not idle */ |
| 731 |
|
| 732 |
viewsteady = 0; /* flag moving view */ |
| 733 |
setglpersp(&odev.v); /* start us off in perspective */ |
| 734 |
while (!XCheckMaskEvent(ourdisplay, |
| 735 |
ButtonReleaseMask, levptr(XEvent))) { |
| 736 |
/* get cursor position */ |
| 737 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
| 738 |
&rootx, &rooty, &wx, &wy, &statemask)) |
| 739 |
break; /* on another screen */ |
| 740 |
/* compute view motion */ |
| 741 |
if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) { |
| 742 |
sleep(1); |
| 743 |
continue; /* cursor in bad place */ |
| 744 |
} |
| 745 |
draw_grids(1); /* redraw grid */ |
| 746 |
#ifdef STEREO |
| 747 |
pushright(); |
| 748 |
draw_grids(1); |
| 749 |
otDrawOctrees(); |
| 750 |
#ifdef DOBJ |
| 751 |
dobj_render(); |
| 752 |
#endif |
| 753 |
popright(); |
| 754 |
#endif |
| 755 |
/* redraw octrees */ |
| 756 |
otDrawOctrees(); |
| 757 |
#ifdef DOBJ |
| 758 |
dobj_render(); /* redraw objects */ |
| 759 |
#endif |
| 760 |
glFlush(); |
| 761 |
} |
| 762 |
if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */ |
| 763 |
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
| 764 |
wx = levptr(XButtonReleasedEvent)->x; |
| 765 |
wy = levptr(XButtonReleasedEvent)->y; |
| 766 |
moveview(wx, odev.vres-1-wy, movdir, movorb); |
| 767 |
} |
| 768 |
} |
| 769 |
|
| 770 |
|
| 771 |
static |
| 772 |
setglpersp(vp) /* set perspective view in GL */ |
| 773 |
register VIEW *vp; |
| 774 |
{ |
| 775 |
double d, xmin, xmax, ymin, ymax; |
| 776 |
GLfloat vec[4]; |
| 777 |
double depthlim[2]; |
| 778 |
/* set depth limits */ |
| 779 |
otDepthLimit(depthlim, odev.v.vp, odev.v.vdir); |
| 780 |
if (depthlim[0] >= depthlim[1]) { |
| 781 |
dev_zmin = 1.; |
| 782 |
dev_zmax = 100.; |
| 783 |
} else { |
| 784 |
dev_zmin = 0.5*depthlim[0]; |
| 785 |
dev_zmax = 1.5*depthlim[1]; |
| 786 |
if (dev_zmin > dev_zmax/5.) |
| 787 |
dev_zmin = dev_zmax/5.; |
| 788 |
} |
| 789 |
if (odev.v.vfore > FTINY) |
| 790 |
dev_zmin = odev.v.vfore; |
| 791 |
if (odev.v.vaft > FTINY) |
| 792 |
dev_zmax = odev.v.vaft; |
| 793 |
if (dev_zmin < dev_zmax/100.) |
| 794 |
dev_zmin = dev_zmax/100.; |
| 795 |
setzrat(); |
| 796 |
xmax = dev_zmin * tan(PI/180./2. * odev.v.horiz); |
| 797 |
xmin = -xmax; |
| 798 |
d = odev.v.hoff * (xmax - xmin); |
| 799 |
xmin += d; xmax += d; |
| 800 |
ymax = dev_zmin * tan(PI/180./2. * odev.v.vert); |
| 801 |
ymin = -ymax; |
| 802 |
d = odev.v.voff * (ymax - ymin); |
| 803 |
ymin += d; ymax += d; |
| 804 |
/* set view matrix */ |
| 805 |
glMatrixMode(GL_PROJECTION); |
| 806 |
glLoadIdentity(); |
| 807 |
glFrustum(xmin, xmax, ymin, ymax, dev_zmin, dev_zmax); |
| 808 |
gluLookAt(odev.v.vp[0], odev.v.vp[1], odev.v.vp[2], |
| 809 |
odev.v.vp[0] + odev.v.vdir[0], |
| 810 |
odev.v.vp[1] + odev.v.vdir[1], |
| 811 |
odev.v.vp[2] + odev.v.vdir[2], |
| 812 |
odev.v.vup[0], odev.v.vup[1], odev.v.vup[2]); |
| 813 |
checkglerr("setting perspective view"); |
| 814 |
isperspective = 1; |
| 815 |
vec[0] = vec[1] = vec[2] = 0.; vec[3] = 1.; |
| 816 |
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, vec); |
| 817 |
vec[0] = -odev.v.vdir[0]; |
| 818 |
vec[1] = -odev.v.vdir[1]; |
| 819 |
vec[2] = -odev.v.vdir[2]; |
| 820 |
vec[3] = 0.; |
| 821 |
glLightfv(GL_LIGHT0, GL_POSITION, vec); |
| 822 |
vec[0] = vec[1] = vec[2] = .7; vec[3] = 1.; |
| 823 |
glLightfv(GL_LIGHT0, GL_SPECULAR, vec); |
| 824 |
glLightfv(GL_LIGHT0, GL_DIFFUSE, vec); |
| 825 |
vec[0] = vec[1] = vec[2] = .3; vec[3] = 1.; |
| 826 |
glLightfv(GL_LIGHT0, GL_AMBIENT, vec); |
| 827 |
glEnable(GL_LIGHT0); |
| 828 |
glEnable(GL_LIGHTING); /* light our GL objects */ |
| 829 |
glShadeModel(GL_SMOOTH); |
| 830 |
} |
| 831 |
|
| 832 |
|
| 833 |
static |
| 834 |
setglortho() /* set up orthographic view for cone drawing */ |
| 835 |
{ |
| 836 |
/* set view matrix */ |
| 837 |
glMatrixMode(GL_PROJECTION); |
| 838 |
glLoadIdentity(); |
| 839 |
glOrtho(0., (double)odev.hres, 0., (double)odev.vres, |
| 840 |
0.001*OMAXDEPTH, 1.001*(-OMAXDEPTH)); |
| 841 |
checkglerr("setting orthographic view"); |
| 842 |
isperspective = 0; |
| 843 |
glDisable(GL_LIGHTING); /* cones are constant color */ |
| 844 |
glShadeModel(GL_FLAT); |
| 845 |
} |
| 846 |
|
| 847 |
|
| 848 |
static |
| 849 |
wipeclean() /* prepare for redraw */ |
| 850 |
{ |
| 851 |
/* clear depth buffer */ |
| 852 |
#ifdef STEREO |
| 853 |
setstereobuf(STEREO_BUFFER_RIGHT); |
| 854 |
glClear(GL_DEPTH_BUFFER_BIT); |
| 855 |
setstereobuf(STEREO_BUFFER_LEFT); |
| 856 |
#endif |
| 857 |
glClear(GL_DEPTH_BUFFER_BIT); |
| 858 |
if (viewsteady) /* clear samples if steady */ |
| 859 |
odClean(); |
| 860 |
if (depthbuffer != NULL) { /* free recorded depth buffer */ |
| 861 |
#ifdef STEREO |
| 862 |
odDepthMap(1, NULL); |
| 863 |
free((char *)depthright); |
| 864 |
depthright = NULL; |
| 865 |
#endif |
| 866 |
odDepthMap(0, NULL); |
| 867 |
free((char *)depthbuffer); |
| 868 |
depthbuffer = NULL; |
| 869 |
} |
| 870 |
setglpersp(&odev.v); /* reset view & clipping planes */ |
| 871 |
} |
| 872 |
|
| 873 |
|
| 874 |
static |
| 875 |
getkey(ekey) /* get input key */ |
| 876 |
register XKeyPressedEvent *ekey; |
| 877 |
{ |
| 878 |
Window rootw, childw; |
| 879 |
int rootx, rooty, wx, wy; |
| 880 |
unsigned int statemask; |
| 881 |
int n; |
| 882 |
char buf[8]; |
| 883 |
|
| 884 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
| 885 |
if (n != 1) |
| 886 |
return; |
| 887 |
switch (buf[0]) { |
| 888 |
case 'h': /* turn on height motion lock */ |
| 889 |
headlocked = 1; |
| 890 |
return; |
| 891 |
case 'H': /* turn off height motion lock */ |
| 892 |
headlocked = 0; |
| 893 |
return; |
| 894 |
case 'l': /* retrieve last view */ |
| 895 |
inpresflags |= DFL(DC_LASTVIEW); |
| 896 |
return; |
| 897 |
case 'p': /* pause computation */ |
| 898 |
inpresflags |= DFL(DC_PAUSE); |
| 899 |
return; |
| 900 |
case 'v': /* spit out view */ |
| 901 |
inpresflags |= DFL(DC_GETVIEW); |
| 902 |
return; |
| 903 |
case 'f': /* frame view position */ |
| 904 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
| 905 |
&rootx, &rooty, &wx, &wy, &statemask)) |
| 906 |
return; /* on another screen */ |
| 907 |
sprintf(odev_args, "%.4f %.4f", (wx+.5)/odev.hres, |
| 908 |
1.-(wy+.5)/odev.vres); |
| 909 |
inpresflags |= DFL(DC_FOCUS); |
| 910 |
return; |
| 911 |
case 'F': /* unfocus */ |
| 912 |
odev_args[0] = '\0'; |
| 913 |
inpresflags |= DFL(DC_FOCUS); |
| 914 |
return; |
| 915 |
case '\n': |
| 916 |
case '\r': /* resume computation */ |
| 917 |
inpresflags |= DFL(DC_RESUME); |
| 918 |
return; |
| 919 |
case CTRL('R'): /* redraw screen */ |
| 920 |
odRemap(); |
| 921 |
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); |
| 922 |
#ifdef STEREO |
| 923 |
setstereobuf(STEREO_BUFFER_RIGHT); |
| 924 |
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); |
| 925 |
setstereobuf(STEREO_BUFFER_LEFT); |
| 926 |
#endif |
| 927 |
return; |
| 928 |
case CTRL('L'): /* refresh from server */ |
| 929 |
if (inpresflags & DFL(DC_REDRAW)) |
| 930 |
return; |
| 931 |
XRaiseWindow(ourdisplay, gwind); |
| 932 |
XFlush(ourdisplay); |
| 933 |
sleep(1); |
| 934 |
wipeclean(); /* fresh display */ |
| 935 |
odRemap(); /* new tone mapping */ |
| 936 |
dev_flush(); /* draw octrees */ |
| 937 |
inpresflags |= DFL(DC_REDRAW); /* resend values from server */ |
| 938 |
rayqleft = 0; /* hold off update */ |
| 939 |
return; |
| 940 |
case 'K': /* kill rtrace process(es) */ |
| 941 |
inpresflags |= DFL(DC_KILL); |
| 942 |
break; |
| 943 |
case 'R': /* restart rtrace */ |
| 944 |
inpresflags |= DFL(DC_RESTART); |
| 945 |
break; |
| 946 |
case 'C': /* clobber holodeck */ |
| 947 |
inpresflags |= DFL(DC_CLOBBER); |
| 948 |
break; |
| 949 |
case 'q': /* quit the program */ |
| 950 |
inpresflags |= DFL(DC_QUIT); |
| 951 |
return; |
| 952 |
default: |
| 953 |
XBell(ourdisplay, 0); |
| 954 |
return; |
| 955 |
} |
| 956 |
} |
| 957 |
|
| 958 |
|
| 959 |
static |
| 960 |
fixwindow(eexp) /* repair damage to window */ |
| 961 |
register XExposeEvent *eexp; |
| 962 |
{ |
| 963 |
int xmin, ymin, xmax, ymax; |
| 964 |
|
| 965 |
if (odev.hres == 0 | odev.vres == 0) { /* first exposure */ |
| 966 |
resizewindow((XConfigureEvent *)eexp); |
| 967 |
return; |
| 968 |
} |
| 969 |
xmin = eexp->x; xmax = eexp->x + eexp->width; |
| 970 |
ymin = odev.vres - eexp->y - eexp->height; ymax = odev.vres - eexp->y; |
| 971 |
/* clear portion of depth */ |
| 972 |
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); |
| 973 |
glDepthFunc(GL_ALWAYS); |
| 974 |
glBegin(GL_POLYGON); |
| 975 |
glVertex3i(xmin, ymin, OMAXDEPTH); |
| 976 |
glVertex3i(xmax, ymin, OMAXDEPTH); |
| 977 |
glVertex3i(xmax, ymax, OMAXDEPTH); |
| 978 |
glVertex3i(xmin, ymax, OMAXDEPTH); |
| 979 |
glEnd(); |
| 980 |
#ifdef STEREO |
| 981 |
setstereobuf(STEREO_BUFFER_RIGHT); |
| 982 |
glBegin(GL_POLYGON); |
| 983 |
glVertex3i(xmin, ymin, OMAXDEPTH); |
| 984 |
glVertex3i(xmax, ymin, OMAXDEPTH); |
| 985 |
glVertex3i(xmax, ymax, OMAXDEPTH); |
| 986 |
glVertex3i(xmin, ymax, OMAXDEPTH); |
| 987 |
glEnd(); |
| 988 |
odRedraw(1, xmin, ymin, xmax, ymax); |
| 989 |
setstereobuf(STEREO_BUFFER_LEFT); |
| 990 |
#endif |
| 991 |
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); |
| 992 |
glDepthFunc(GL_LEQUAL); |
| 993 |
odRedraw(0, xmin, ymin, xmax, ymax); |
| 994 |
} |
| 995 |
|
| 996 |
|
| 997 |
static |
| 998 |
resizewindow(ersz) /* resize window */ |
| 999 |
register XConfigureEvent *ersz; |
| 1000 |
{ |
| 1001 |
glViewport(0, 0, ersz->width, ersz->height); |
| 1002 |
|
| 1003 |
if (ersz->width == odev.hres && ersz->height == odev.vres) |
| 1004 |
return; |
| 1005 |
|
| 1006 |
odev.hres = ersz->width; |
| 1007 |
odev.vres = ersz->height; |
| 1008 |
|
| 1009 |
odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres); |
| 1010 |
odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres); |
| 1011 |
|
| 1012 |
inpresflags |= DFL(DC_SETVIEW)|DFL(DC_REDRAW); |
| 1013 |
} |
