| 1 |
/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
| 2 |
|
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#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ SGI"; |
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#endif |
| 6 |
|
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/* |
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* OpenGL GLX driver for holodeck display. |
| 9 |
* Based on rview driver. |
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*/ |
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|
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#include "standard.h" |
| 13 |
#include "tonemap.h" |
| 14 |
#include "rhdriver.h" |
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|
| 16 |
#include <GL/glx.h> |
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|
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#include "x11icon.h" |
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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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#ifndef int4 |
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#define int4 int |
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#endif |
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|
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#ifndef FREEPCT |
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#define FREEPCT 25 /* percentage of values to free */ |
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#endif |
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|
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#ifndef NCONEV |
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#define NCONEV 7 /* number of cone base vertices */ |
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#endif |
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#ifndef CONEH |
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#define CONEH 0.25 /* cone height (fraction of depth) */ |
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#endif |
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#ifndef CONEW |
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#define CONEW 0.035 /* cone width (fraction of screen) */ |
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#endif |
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|
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#define GAMMA 2.2 /* default gamma correction */ |
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|
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#define MOVPCT 7 /* percent distance to move /frame */ |
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#define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1) |
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#define MOVDEG (-5) /* degrees to orbit CW/down /frame */ |
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#define MOVORB(s) ((s)&ShiftMask ? 1 : (s)&ControlMask ? -1 : 0) |
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|
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#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 ourscreen DefaultScreen(ourdisplay) |
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#define ourroot RootWindow(ourdisplay,ourscreen) |
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#define ourmask (StructureNotifyMask|ExposureMask|KeyPressMask|\ |
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ButtonPressMask|ButtonReleaseMask) |
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|
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#define levptr(etype) ((etype *)¤tevent) |
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|
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struct driver odev; /* global device driver structure */ |
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|
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static 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 *pixval = NULL; /* allocated pixels */ |
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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 mindepth = FHUGE; /* minimum depth value so far */ |
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static double maxdepth = 0.; /* maximum depth value */ |
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|
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static double pwidth, pheight; /* pixel dimensions (mm) */ |
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|
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static FVECT conev[NCONEV]; /* drawing cone */ |
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static double coneh; /* cone height */ |
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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 struct { |
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float (*wp)[3]; /* world intersection point array */ |
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int4 *wd; /* world direction array */ |
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TMbright *brt; /* encoded brightness array */ |
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BYTE (*chr)[3]; /* encoded chrominance array */ |
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BYTE (*rgb)[3]; /* tone-mapped color array */ |
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BYTE *alpha; /* alpha values */ |
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int nl; /* count of values */ |
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int bl, tl; /* bottom and top (next) value index */ |
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int tml; /* next value needing tone-mapping */ |
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int drl; /* next value in need of drawing */ |
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char *base; /* base of allocated memory */ |
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} rV; /* our collection of values */ |
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|
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#define redraw() (rV.drl = rV.bl) |
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|
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static int resizewindow(), getevent(), getkey(), moveview(), |
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setGLview(), getmove(), fixwindow(), mytmflags(), |
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newvalue(), drawvalue(), Compost(), |
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FindValue(), AllocValues(), TMapValues(), FreeValues(); |
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|
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|
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dev_open(id) /* initialize X11 driver */ |
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char *id; |
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{ |
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extern char *getenv(); |
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static int atlBest[] = {GLX_RGBA, GLX_RED_SIZE,8, |
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GLX_GREEN_SIZE,8, GLX_BLUE_SIZE,8, |
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GLX_ALPHA_SIZE,8, GLX_DEPTH_SIZE,23, |
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/*GLX_DOUBLEBUFFER,*/ None}; |
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static int atlOK[] = {GLX_RGBA, GLX_RED_SIZE,4, |
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GLX_GREEN_SIZE,4, GLX_BLUE_SIZE,4, |
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GLX_ALPHA_SIZE,4, GLX_DEPTH_SIZE,15, |
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/*GLX_DOUBLEBUFFER,*/ None}; |
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char *gv; |
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double gamval = GAMMA; |
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XSetWindowAttributes ourwinattr; |
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XWMHints ourxwmhints; |
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XSizeHints oursizhints; |
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/* open display server */ |
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ourdisplay = XOpenDisplay(NULL); |
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if (ourdisplay == NULL) |
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error(USER, "cannot open X-windows; DISPLAY variable set?\n"); |
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/* find a usable visual */ |
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ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlBest); |
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if (ourvinf == NULL) |
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ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlOK); |
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if (ourvinf == NULL) |
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error(USER, "no suitable visuals available"); |
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/* get a context */ |
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gctx = glXCreateContext(ourdisplay, ourvinf, NULL, GL_TRUE); |
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/* set gamma and tone mapping */ |
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if ((gv = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL |
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|| (gv = getenv("DISPLAY_GAMMA")) != NULL) |
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gamval = atof(gv); |
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if (tmInit(mytmflags(), stdprims, gamval) == NULL) |
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error(SYSTEM, "not enough memory in dev_open"); |
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/* open window */ |
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ourwinattr.background_pixel = ourblack; |
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ourwinattr.border_pixel = ourblack; |
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ourwinattr.event_mask = ourmask; |
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/* this is stupid */ |
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ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot, |
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ourvinf->visual, AllocNone); |
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gwind = XCreateWindow(ourdisplay, ourroot, 0, 0, |
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DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH, |
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DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH, |
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BORWIDTH, ourvinf->depth, InputOutput, ourvinf->visual, |
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CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &ourwinattr); |
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if (gwind == 0) |
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error(SYSTEM, "cannot create window\n"); |
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XStoreName(ourdisplay, gwind, id); |
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/* set window manager hints */ |
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ourxwmhints.flags = InputHint|IconPixmapHint; |
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ourxwmhints.input = True; |
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ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay, |
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gwind, x11icon_bits, x11icon_width, x11icon_height); |
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XSetWMHints(ourdisplay, gwind, &ourxwmhints); |
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oursizhints.min_width = MINWIDTH; |
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oursizhints.min_height = MINHEIGHT; |
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oursizhints.flags = PMinSize; |
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XSetNormalHints(ourdisplay, gwind, &oursizhints); |
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/* map the window and get its size */ |
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XMapWindow(ourdisplay, gwind); |
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dev_input(); |
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/* allocate our value list */ |
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if (!AllocValues(DisplayWidth(ourdisplay,ourscreen) * |
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DisplayHeight(ourdisplay,ourscreen) / 4)) |
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error(SYSTEM, "insufficient memory for value storage"); |
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/* figure out sensible view */ |
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pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) / |
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DisplayWidth(ourdisplay, ourscreen); |
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pheight = (double)DisplayHeightMM(ourdisplay, ourscreen) / |
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DisplayHeight(ourdisplay, ourscreen); |
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copystruct(&odev.v, &stdview); |
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odev.v.type = VT_PER; |
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odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres); |
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odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres); |
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odev.name = id; |
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odev.ifd = ConnectionNumber(ourdisplay); |
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/* set GLX context and clear buffers */ |
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glXMakeCurrent(ourdisplay, gwind, gctx); |
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glEnable(GL_DEPTH_TEST); |
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glDepthFunc(GL_LEQUAL); |
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glShadeModel(GL_FLAT); |
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glDisable(GL_DITHER); |
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glDrawBuffer(GL_FRONT_AND_BACK); |
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glReadBuffer(GL_BACK); |
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
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setGLview(); /* initialize view */ |
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} |
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|
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|
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dev_close() /* close our display and free resources */ |
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{ |
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glXMakeCurrent(ourdisplay, None, NULL); |
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glXDestroyContext(ourdisplay, gctx); |
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XDestroyWindow(ourdisplay, gwind); |
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gwind = 0; |
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XCloseDisplay(ourdisplay); |
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ourdisplay = NULL; |
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tmDone(NULL); |
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FreeValues(); |
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odev.v.type = 0; |
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odev.hres = odev.vres = 0; |
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odev.ifd = -1; |
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} |
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|
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|
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int |
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dev_view(nv) /* assign new driver view */ |
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register VIEW *nv; |
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{ |
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if (nv->type != VT_PER || /* check view legality */ |
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nv->horiz > 120. || nv->vert > 120.) { |
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error(COMMAND, "illegal view type/angle"); |
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nv->type = VT_PER; |
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nv->horiz = odev.v.horiz; |
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nv->vert = odev.v.vert; |
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return(0); |
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} |
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if (nv != &odev.v) { |
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if (!FEQ(nv->horiz,odev.v.horiz) || /* resize window? */ |
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!FEQ(nv->vert,odev.v.vert)) { |
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int dw = DisplayWidth(ourdisplay,ourscreen); |
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int dh = DisplayHeight(ourdisplay,ourscreen); |
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|
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dw -= 25; /* for window frame */ |
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dh -= 50; |
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odev.hres = 2.*VIEWDIST/pwidth * |
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tan(PI/180./2.*nv->horiz); |
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odev.vres = 2.*VIEWDIST/pheight * |
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tan(PI/180./2.*nv->vert); |
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if (odev.hres > dw) { |
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odev.vres = dw * odev.vres / odev.hres; |
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odev.hres = dw; |
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} |
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if (odev.vres > dh) { |
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odev.hres = dh * odev.hres / odev.vres; |
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odev.vres = dh; |
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} |
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XResizeWindow(ourdisplay, gwind, odev.hres, odev.vres); |
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} |
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copystruct(&odev.v, nv); |
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setGLview(); |
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} |
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
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redraw(); |
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return(1); |
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} |
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|
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|
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int |
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dev_input() /* get X11 input */ |
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{ |
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inpresflags = 0; |
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|
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do |
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getevent(); |
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|
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while (XQLength(ourdisplay) > 0); |
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|
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return(inpresflags); |
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} |
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|
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|
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dev_value(c, p, v) /* add a pixel value to our list */ |
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COLR c; |
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FVECT p, v; |
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{ |
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register int li; |
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|
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li = newvalue(); |
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VCOPY(rV.wp[li], p); |
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rV.wd[li] = encodedir(v); |
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tmCvColrs(&rV.brt[li], rV.chr[li], c, 1); |
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} |
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|
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|
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int |
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dev_flush() /* flush output */ |
| 289 |
{ |
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if (mapped) { |
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TMapValues(0); |
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while (rV.drl != rV.tl) { |
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drawvalue(rV.drl); |
| 294 |
if (++rV.drl >= rV.nl) |
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rV.drl = 0; |
| 296 |
} |
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glFlush(); |
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} |
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return(XPending(ourdisplay)); |
| 300 |
} |
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|
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|
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static int |
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mytmflags() /* figure out tone mapping flags */ |
| 305 |
{ |
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extern char *progname; |
| 307 |
register char *cp, *tail; |
| 308 |
/* find basic name */ |
| 309 |
for (cp = tail = progname; *cp; cp++) |
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if (*cp == '/') |
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tail = cp+1; |
| 312 |
for (cp = tail; *cp && *cp != '.'; cp++) |
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; |
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if (cp-tail == 3 && !strncmp(tail, "glx", 3)) |
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return(TM_F_CAMERA); |
| 316 |
if (cp-tail == 4 && !strncmp(tail, "glxh", 4)) |
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return(TM_F_HUMAN); |
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error(USER, "illegal driver name"); |
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} |
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|
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|
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static |
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setGLview() /* set our GL view */ |
| 324 |
{ |
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double xmin, xmax, ymin, ymax, zmin, zmax; |
| 326 |
double d, cx, sx, crad; |
| 327 |
FVECT vx, vy; |
| 328 |
register int i, j; |
| 329 |
/* compute view frustum */ |
| 330 |
if (normalize(odev.v.vdir) == 0.0) |
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return; |
| 332 |
if (mindepth < maxdepth) { |
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zmin = 0.25*mindepth; |
| 334 |
zmax = 8.0*maxdepth; |
| 335 |
} else { |
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zmin = 0.01; |
| 337 |
zmax = 1000.; |
| 338 |
} |
| 339 |
if (odev.v.vfore > FTINY) |
| 340 |
zmin = odev.v.vfore; |
| 341 |
if (odev.v.vaft > FTINY) |
| 342 |
zmax = odev.v.vaft; |
| 343 |
xmax = zmin * tan(PI/180./2. * odev.v.horiz); |
| 344 |
xmin = -xmax; |
| 345 |
d = odev.v.hoff * (xmax - xmin); |
| 346 |
xmin += d; xmax += d; |
| 347 |
ymax = zmin * tan(PI/180./2. * odev.v.vert); |
| 348 |
ymin = -ymax; |
| 349 |
d = odev.v.voff * (ymax - ymin); |
| 350 |
ymin += d; ymax += d; |
| 351 |
/* set view matrix */ |
| 352 |
glMatrixMode(GL_PROJECTION); |
| 353 |
glLoadIdentity(); |
| 354 |
glFrustum(xmin, xmax, ymin, ymax, zmin, zmax); |
| 355 |
gluLookAt(odev.v.vp[0], odev.v.vp[1], odev.v.vp[2], |
| 356 |
odev.v.vp[0] + odev.v.vdir[0], |
| 357 |
odev.v.vp[1] + odev.v.vdir[1], |
| 358 |
odev.v.vp[2] + odev.v.vdir[2], |
| 359 |
odev.v.vup[0], odev.v.vup[1], odev.v.vup[2]); |
| 360 |
/* set viewport */ |
| 361 |
glViewport(0, 0, odev.hres, odev.vres); |
| 362 |
/* initialize cone for Vornoi polys */ |
| 363 |
coneh = CONEH*(zmax - zmin); |
| 364 |
crad = 0.5 * CONEW * 0.5*(xmax-xmin + ymax-ymin) * (zmin+coneh)/zmin; |
| 365 |
vy[0] = vy[1] = vy[2] = 0.; |
| 366 |
for (i = 0; i < 3; i++) |
| 367 |
if (odev.v.vdir[i] < 0.6 && odev.v.vdir[i] > -0.6) |
| 368 |
break; |
| 369 |
vy[i] = 1.; |
| 370 |
fcross(vx, vy, odev.v.vdir); |
| 371 |
normalize(vx); |
| 372 |
fcross(vy, odev.v.vdir, vx); |
| 373 |
for (j = 0, d = 0.; j < NCONEV; j++, d += 2.*PI/NCONEV) { |
| 374 |
cx = crad*cos(d); sx = crad*sin(d); |
| 375 |
for (i = 0; i < 3; i++) |
| 376 |
conev[j][i] = coneh*odev.v.vdir[i] + |
| 377 |
cx*vx[i] + sx*vy[i]; |
| 378 |
} |
| 379 |
} |
| 380 |
|
| 381 |
|
| 382 |
static int |
| 383 |
newvalue() /* allocate a leaf from our pile */ |
| 384 |
{ |
| 385 |
int li; |
| 386 |
|
| 387 |
li = rV.tl++; |
| 388 |
if (rV.tl >= rV.nl) /* get next leaf in ring */ |
| 389 |
rV.tl = 0; |
| 390 |
if (rV.tl == rV.bl) /* need to shake some free */ |
| 391 |
Compost(FREEPCT); |
| 392 |
return(li); |
| 393 |
} |
| 394 |
|
| 395 |
|
| 396 |
static |
| 397 |
drawvalue(li) /* draw a pixel value as a cone */ |
| 398 |
register int li; |
| 399 |
{ |
| 400 |
static FVECT apex, disp; |
| 401 |
double d, h, v; |
| 402 |
register int i; |
| 403 |
/* compute cone's base displacement */ |
| 404 |
VCOPY(apex, rV.wp[li]); |
| 405 |
disp[0] = apex[0] - odev.v.vp[0]; |
| 406 |
disp[1] = apex[1] - odev.v.vp[1]; |
| 407 |
disp[2] = apex[2] - odev.v.vp[2]; |
| 408 |
if ((d = DOT(disp,odev.v.vdir)) <= odev.v.vfore || d <= FTINY) |
| 409 |
return; |
| 410 |
if (d > 1e5) { /* background region */ |
| 411 |
if (odev.v.vaft > FTINY) |
| 412 |
return; |
| 413 |
h = maxdepth/d; |
| 414 |
disp[0] *= h; disp[1] *= h; disp[2] *= h; |
| 415 |
apex[0] = odev.v.vp[0] + disp[0]; |
| 416 |
apex[1] = odev.v.vp[1] + disp[1]; |
| 417 |
apex[2] = odev.v.vp[2] + disp[2]; |
| 418 |
d = maxdepth; |
| 419 |
} else if (d > maxdepth) |
| 420 |
maxdepth = d; |
| 421 |
h = DOT(disp,odev.v.hvec)/(d*odev.v.hn2); |
| 422 |
v = DOT(disp,odev.v.vvec)/(d*odev.v.vn2); |
| 423 |
if (fabs(h - odev.v.hoff) < 0.5 && fabs(v - odev.v.voff) < 0.5 && |
| 424 |
d < mindepth) |
| 425 |
{ |
| 426 |
fprintf(stderr, "min depth now %lf (%lf,%lf,%lf)\n", d, apex[0], apex[1], apex[2]); |
| 427 |
mindepth = d; |
| 428 |
} |
| 429 |
for (i = 0; i < 3; i++) |
| 430 |
disp[i] = apex[i] + coneh*(h*odev.v.hvec[i] + v*odev.v.vvec[i]); |
| 431 |
/* draw pyramid (cone approx.) */ |
| 432 |
glColor4ub(rV.rgb[li][0], rV.rgb[li][1], rV.rgb[li][2], rV.alpha[li]); |
| 433 |
glBegin(GL_TRIANGLE_FAN); |
| 434 |
glVertex3f(apex[0], apex[1], apex[2]); |
| 435 |
for (i = 0; i < NCONEV; i++) |
| 436 |
glVertex3d(conev[i][0] + disp[0], conev[i][1] + disp[1], |
| 437 |
conev[i][2] + disp[2]); |
| 438 |
/* connect last side to first */ |
| 439 |
glVertex3d(conev[0][0] + disp[0], conev[0][1] + disp[1], |
| 440 |
conev[0][2] + disp[2]); |
| 441 |
glEnd(); /* done */ |
| 442 |
} |
| 443 |
|
| 444 |
|
| 445 |
#define LEAFSIZ (3*sizeof(float)+sizeof(int4)+\ |
| 446 |
sizeof(TMbright)+7*sizeof(BYTE)) |
| 447 |
|
| 448 |
static |
| 449 |
AllocValues(n) /* allocate space for n values */ |
| 450 |
register int n; |
| 451 |
{ |
| 452 |
unsigned nbytes; |
| 453 |
register unsigned i; |
| 454 |
|
| 455 |
if (n <= 0) |
| 456 |
return(0); |
| 457 |
if (rV.nl >= n) |
| 458 |
return(rV.nl); |
| 459 |
else if (rV.nl > 0) |
| 460 |
free(rV.base); |
| 461 |
/* round space up to nearest power of 2 */ |
| 462 |
nbytes = n*LEAFSIZ + 8; |
| 463 |
for (i = 1024; nbytes > i; i <<= 1) |
| 464 |
; |
| 465 |
n = (i - 8) / LEAFSIZ; /* should we make sure n is even? */ |
| 466 |
rV.base = (char *)malloc(n*LEAFSIZ); |
| 467 |
if (rV.base == NULL) |
| 468 |
return(0); |
| 469 |
/* assign larger alignment types earlier */ |
| 470 |
rV.wp = (float (*)[3])rV.base; |
| 471 |
rV.wd = (int4 *)(rV.wp + n); |
| 472 |
rV.brt = (TMbright *)(rV.wd + n); |
| 473 |
rV.chr = (BYTE (*)[3])(rV.brt + n); |
| 474 |
rV.rgb = (BYTE (*)[3])(rV.chr + n); |
| 475 |
rV.alpha = (BYTE *)(rV.rgb + n); |
| 476 |
rV.nl = n; |
| 477 |
rV.drl = rV.tml = rV.bl = rV.tl = 0; |
| 478 |
return(n); |
| 479 |
} |
| 480 |
|
| 481 |
#undef LEAFSIZ |
| 482 |
|
| 483 |
|
| 484 |
static |
| 485 |
FreeValues() /* free our allocated values */ |
| 486 |
{ |
| 487 |
if (rV.nl <= 0) |
| 488 |
return; |
| 489 |
free(rV.base); |
| 490 |
rV.base = NULL; |
| 491 |
rV.nl = 0; |
| 492 |
} |
| 493 |
|
| 494 |
|
| 495 |
static |
| 496 |
TMapValues(redo) /* map our values to RGB */ |
| 497 |
int redo; |
| 498 |
{ |
| 499 |
int aorg, alen, borg, blen; |
| 500 |
/* recompute mapping? */ |
| 501 |
if (redo) |
| 502 |
rV.tml = rV.bl; |
| 503 |
/* already done? */ |
| 504 |
if (rV.tml == rV.tl) |
| 505 |
return(1); |
| 506 |
/* compute segments */ |
| 507 |
aorg = rV.tml; |
| 508 |
if (rV.tl >= aorg) { |
| 509 |
alen = rV.tl - aorg; |
| 510 |
blen = 0; |
| 511 |
} else { |
| 512 |
alen = rV.nl - aorg; |
| 513 |
borg = 0; |
| 514 |
blen = rV.tl; |
| 515 |
} |
| 516 |
/* (re)compute tone mapping? */ |
| 517 |
if (rV.tml == rV.bl) { |
| 518 |
tmClearHisto(); |
| 519 |
tmAddHisto(rV.brt+aorg, alen, 1); |
| 520 |
if (blen > 0) |
| 521 |
tmAddHisto(rV.brt+borg, blen, 1); |
| 522 |
if (tmComputeMapping(0., 0., 0.) != TM_E_OK) |
| 523 |
return(0); |
| 524 |
rV.drl = rV.bl; |
| 525 |
} |
| 526 |
if (tmMapPixels(rV.rgb+aorg, rV.brt+aorg, |
| 527 |
rV.chr+aorg, alen) != TM_E_OK) |
| 528 |
return(0); |
| 529 |
if (blen > 0) |
| 530 |
tmMapPixels(rV.rgb+borg, rV.brt+borg, |
| 531 |
rV.chr+borg, blen); |
| 532 |
/* compute unique alpha values */ |
| 533 |
rV.tml = rV.tl; |
| 534 |
return(1); |
| 535 |
} |
| 536 |
|
| 537 |
|
| 538 |
static int |
| 539 |
Compost(pct) /* free up some values */ |
| 540 |
int pct; |
| 541 |
{ |
| 542 |
int nused, nclear, nmapped, ndrawn; |
| 543 |
/* figure out how many values to clear */ |
| 544 |
nclear = rV.nl * pct / 100; |
| 545 |
nused = rV.tl - rV.bl; |
| 546 |
if (nused <= 0) nused += rV.nl; |
| 547 |
nclear -= rV.nl - nused; |
| 548 |
if (nclear <= 0) |
| 549 |
return(0); |
| 550 |
if (nclear >= nused) { /* clear them all */ |
| 551 |
rV.drl = rV.tml = rV.bl = rV.tl = 0; |
| 552 |
return(nused); |
| 553 |
} |
| 554 |
/* else clear values from bottom */ |
| 555 |
ndrawn = rV.drl - rV.bl; |
| 556 |
if (ndrawn < 0) ndrawn += rV.nl; |
| 557 |
nmapped = rV.tml - rV.bl; |
| 558 |
if (nmapped < 0) nmapped += rV.nl; |
| 559 |
rV.bl += nclear; |
| 560 |
if (rV.bl >= rV.nl) rV.bl -= rV.nl; |
| 561 |
if (ndrawn < nclear) rV.drl = rV.bl; |
| 562 |
if (nmapped < nclear) rV.tml = rV.bl; |
| 563 |
return(nclear); |
| 564 |
} |
| 565 |
|
| 566 |
|
| 567 |
static |
| 568 |
getevent() /* get next event */ |
| 569 |
{ |
| 570 |
XNextEvent(ourdisplay, levptr(XEvent)); |
| 571 |
switch (levptr(XEvent)->type) { |
| 572 |
case ConfigureNotify: |
| 573 |
resizewindow(levptr(XConfigureEvent)); |
| 574 |
break; |
| 575 |
case UnmapNotify: |
| 576 |
mapped = 0; |
| 577 |
break; |
| 578 |
case MapNotify: |
| 579 |
mapped = 1; |
| 580 |
break; |
| 581 |
case Expose: |
| 582 |
fixwindow(levptr(XExposeEvent)); |
| 583 |
break; |
| 584 |
case KeyPress: |
| 585 |
getkey(levptr(XKeyPressedEvent)); |
| 586 |
break; |
| 587 |
case ButtonPress: |
| 588 |
getmove(levptr(XButtonPressedEvent)); |
| 589 |
break; |
| 590 |
} |
| 591 |
} |
| 592 |
|
| 593 |
|
| 594 |
static |
| 595 |
draw3dline(wp) /* draw 3d line in world coordinates */ |
| 596 |
register FVECT wp[2]; |
| 597 |
{ |
| 598 |
glVertex3d(wp[0][0], wp[0][1], wp[0][2]); |
| 599 |
glVertex3d(wp[1][0], wp[1][1], wp[1][2]); |
| 600 |
} |
| 601 |
|
| 602 |
|
| 603 |
static |
| 604 |
draw_grids() /* draw holodeck section grids */ |
| 605 |
{ |
| 606 |
static GLubyte gridrgba[4] = {0x0, 0xff, 0xff, 0x00}; |
| 607 |
|
| 608 |
if (!mapped) |
| 609 |
return; |
| 610 |
glColor4ub(gridrgba[0], gridrgba[1], gridrgba[2], gridrgba[3]); |
| 611 |
/* draw each grid line */ |
| 612 |
glBegin(GL_LINES); |
| 613 |
gridlines(draw3dline); |
| 614 |
glEnd(); |
| 615 |
} |
| 616 |
|
| 617 |
|
| 618 |
static int |
| 619 |
FindValue(dx, dy) /* find a value on the display */ |
| 620 |
int dx, dy; |
| 621 |
{ |
| 622 |
return(-1); /* not found */ |
| 623 |
} |
| 624 |
|
| 625 |
|
| 626 |
static |
| 627 |
moveview(dx, dy, mov, orb) /* move our view */ |
| 628 |
int dx, dy, mov, orb; |
| 629 |
{ |
| 630 |
VIEW nv; |
| 631 |
FVECT odir, v1; |
| 632 |
double d; |
| 633 |
register int li; |
| 634 |
/* start with old view */ |
| 635 |
copystruct(&nv, &odev.v); |
| 636 |
/* change view direction */ |
| 637 |
if (mov | orb) { |
| 638 |
if ((li = FindValue(dx, dy)) < 0) |
| 639 |
return(0); /* not on window */ |
| 640 |
VSUM(odir, rV.wp[li], nv.vp, -1.); |
| 641 |
} else { |
| 642 |
if (viewray(nv.vp, nv.vdir, &odev.v, |
| 643 |
(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY) |
| 644 |
return(0); /* outside view */ |
| 645 |
} |
| 646 |
if (orb && mov) { /* orbit left/right */ |
| 647 |
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov); |
| 648 |
VSUM(nv.vp, rV.wp[li], odir, -1.); |
| 649 |
spinvector(nv.vdir, nv.vdir, nv.vup, d); |
| 650 |
} else if (orb) { /* orbit up/down */ |
| 651 |
fcross(v1, odir, nv.vup); |
| 652 |
if (normalize(v1) == 0.) |
| 653 |
return(0); |
| 654 |
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb); |
| 655 |
VSUM(nv.vp, rV.wp[li], odir, -1.); |
| 656 |
spinvector(nv.vdir, nv.vdir, v1, d); |
| 657 |
} else if (mov) { /* move forward/backward */ |
| 658 |
d = MOVPCT/100. * mov; |
| 659 |
VSUM(nv.vp, nv.vp, odir, d); |
| 660 |
} |
| 661 |
if (!mov ^ !orb && headlocked) { /* restore head height */ |
| 662 |
VSUM(v1, odev.v.vp, nv.vp, -1.); |
| 663 |
d = DOT(v1, odev.v.vup); |
| 664 |
VSUM(nv.vp, nv.vp, odev.v.vup, d); |
| 665 |
} |
| 666 |
if (setview(&nv) != NULL) |
| 667 |
return(0); /* illegal view */ |
| 668 |
dev_view(&nv); |
| 669 |
inpresflags |= DFL(DC_SETVIEW); |
| 670 |
return(1); |
| 671 |
} |
| 672 |
|
| 673 |
|
| 674 |
static |
| 675 |
getmove(ebut) /* get view change */ |
| 676 |
XButtonPressedEvent *ebut; |
| 677 |
{ |
| 678 |
int movdir = MOVDIR(ebut->button); |
| 679 |
int movorb = MOVORB(ebut->state); |
| 680 |
Window rootw, childw; |
| 681 |
int rootx, rooty, wx, wy; |
| 682 |
unsigned int statemask; |
| 683 |
|
| 684 |
XNoOp(ourdisplay); |
| 685 |
|
| 686 |
while (!XCheckMaskEvent(ourdisplay, |
| 687 |
ButtonReleaseMask, levptr(XEvent))) { |
| 688 |
|
| 689 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
| 690 |
&rootx, &rooty, &wx, &wy, &statemask)) |
| 691 |
break; /* on another screen */ |
| 692 |
|
| 693 |
if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) { |
| 694 |
sleep(1); |
| 695 |
continue; |
| 696 |
} |
| 697 |
draw_grids(); |
| 698 |
dev_flush(); |
| 699 |
} |
| 700 |
if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */ |
| 701 |
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
| 702 |
wx = levptr(XButtonReleasedEvent)->x; |
| 703 |
wy = levptr(XButtonReleasedEvent)->y; |
| 704 |
moveview(wx, odev.vres-1-wy, movdir, movorb); |
| 705 |
} |
| 706 |
dev_flush(); |
| 707 |
} |
| 708 |
|
| 709 |
|
| 710 |
static |
| 711 |
getkey(ekey) /* get input key */ |
| 712 |
register XKeyPressedEvent *ekey; |
| 713 |
{ |
| 714 |
int n; |
| 715 |
char buf[8]; |
| 716 |
|
| 717 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
| 718 |
if (n != 1) |
| 719 |
return; |
| 720 |
switch (buf[0]) { |
| 721 |
case 'h': /* turn on height motion lock */ |
| 722 |
headlocked = 1; |
| 723 |
return; |
| 724 |
case 'H': /* turn off height motion lock */ |
| 725 |
headlocked = 0; |
| 726 |
return; |
| 727 |
case 'l': /* retrieve last view */ |
| 728 |
inpresflags |= DFL(DC_LASTVIEW); |
| 729 |
return; |
| 730 |
case 'p': /* pause computation */ |
| 731 |
inpresflags |= DFL(DC_PAUSE); |
| 732 |
return; |
| 733 |
case 'v': /* spit out view */ |
| 734 |
inpresflags |= DFL(DC_GETVIEW); |
| 735 |
return; |
| 736 |
case '\n': |
| 737 |
case '\r': /* resume computation */ |
| 738 |
inpresflags |= DFL(DC_RESUME); |
| 739 |
return; |
| 740 |
case CTRL('R'): /* redraw screen */ |
| 741 |
TMapValues(1); |
| 742 |
redraw(); |
| 743 |
return; |
| 744 |
case CTRL('L'): /* refresh from server */ |
| 745 |
if (inpresflags & DFL(DC_REDRAW)) |
| 746 |
return; |
| 747 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| 748 |
glDrawBuffer(GL_FRONT); |
| 749 |
glDisable(GL_DEPTH_TEST); |
| 750 |
draw_grids(); |
| 751 |
glEnable(GL_DEPTH_TEST); |
| 752 |
glDrawBuffer(GL_FRONT_AND_BACK); |
| 753 |
glFlush(); |
| 754 |
Compost(100); /* get rid of old values */ |
| 755 |
inpresflags |= DFL(DC_REDRAW); /* resend values from server */ |
| 756 |
return; |
| 757 |
case 'K': /* kill rtrace process(es) */ |
| 758 |
inpresflags |= DFL(DC_KILL); |
| 759 |
break; |
| 760 |
case 'R': /* restart rtrace */ |
| 761 |
inpresflags |= DFL(DC_RESTART); |
| 762 |
break; |
| 763 |
case 'C': /* clobber holodeck */ |
| 764 |
inpresflags |= DFL(DC_CLOBBER); |
| 765 |
break; |
| 766 |
case 'q': /* quit the program */ |
| 767 |
inpresflags |= DFL(DC_QUIT); |
| 768 |
return; |
| 769 |
default: |
| 770 |
XBell(ourdisplay, 0); |
| 771 |
return; |
| 772 |
} |
| 773 |
} |
| 774 |
|
| 775 |
|
| 776 |
static |
| 777 |
fixwindow(eexp) /* repair damage to window */ |
| 778 |
register XExposeEvent *eexp; |
| 779 |
{ |
| 780 |
if (odev.hres == 0 || odev.vres == 0) { /* first exposure */ |
| 781 |
odev.hres = eexp->width; |
| 782 |
odev.vres = eexp->height; |
| 783 |
} |
| 784 |
if (eexp->width == odev.hres && eexp->height == odev.vres) |
| 785 |
TMapValues(1); |
| 786 |
if (!eexp->count) |
| 787 |
redraw(); |
| 788 |
} |
| 789 |
|
| 790 |
|
| 791 |
static |
| 792 |
resizewindow(ersz) /* resize window */ |
| 793 |
register XConfigureEvent *ersz; |
| 794 |
{ |
| 795 |
if (ersz->width == odev.hres && ersz->height == odev.vres) |
| 796 |
return; |
| 797 |
|
| 798 |
odev.hres = ersz->width; |
| 799 |
odev.vres = ersz->height; |
| 800 |
|
| 801 |
odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres); |
| 802 |
odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres); |
| 803 |
|
| 804 |
setGLview(); |
| 805 |
|
| 806 |
inpresflags |= DFL(DC_SETVIEW); |
| 807 |
} |
