| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: rhd_glx2.c,v 3.1 2003/02/22 02:07:24 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* OpenGL GLX driver for holodeck display. |
| 6 |
* Based on standard GLX driver. |
| 7 |
*/ |
| 8 |
|
| 9 |
#include "standard.h" |
| 10 |
#include "rhd_sample.h" |
| 11 |
|
| 12 |
#include <sys/types.h> |
| 13 |
#include <GL/glx.h> |
| 14 |
#include <GL/glu.h> |
| 15 |
#include <X11/extensions/SGIStereo.h> |
| 16 |
#include <gl/get.h> |
| 17 |
|
| 18 |
#include "x11icon.h" |
| 19 |
|
| 20 |
#ifndef RAYQLEN |
| 21 |
#define RAYQLEN 50000 /* max. rays to queue before flush */ |
| 22 |
#endif |
| 23 |
|
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#ifndef FEQ |
| 25 |
#define FEQ(a,b) ((a)-(b) <= FTINY && (a)-(b) >= -FTINY) |
| 26 |
#endif |
| 27 |
|
| 28 |
#define GAMMA 1.4 /* default gamma correction */ |
| 29 |
|
| 30 |
#define MOVPCT 7 /* percent distance to move /frame */ |
| 31 |
#define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1) |
| 32 |
#define MOVDEG (-5) /* degrees to orbit CW/down /frame */ |
| 33 |
#define MOVORB(s) ((s)&ShiftMask ? 1 : (s)&ControlMask ? -1 : 0) |
| 34 |
|
| 35 |
#ifndef TARGETFPS |
| 36 |
#define TARGETFPS 4.0 /* target frames/sec during motion */ |
| 37 |
#endif |
| 38 |
|
| 39 |
#define MINWIDTH 480 /* minimum stereo window width */ |
| 40 |
#define MINHEIGHT 400 /* minimum stereo window height */ |
| 41 |
|
| 42 |
#define VIEWDIST 356 /* assumed viewing distance (mm) */ |
| 43 |
|
| 44 |
#define BORWIDTH 5 /* border width */ |
| 45 |
|
| 46 |
#define setstereobuf(bid) (glXWaitGL(), \ |
| 47 |
XSGISetStereoBuffer(ourdisplay, gwind, bid), \ |
| 48 |
glXWaitX()) |
| 49 |
|
| 50 |
#define ourscreen DefaultScreen(ourdisplay) |
| 51 |
#define ourroot RootWindow(ourdisplay,ourscreen) |
| 52 |
#define ourmask (StructureNotifyMask|ExposureMask|KeyPressMask|\ |
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ButtonPressMask|ButtonReleaseMask) |
| 54 |
|
| 55 |
#define levptr(etype) ((etype *)¤tevent) |
| 56 |
|
| 57 |
struct driver odev; /* global device driver structure */ |
| 58 |
|
| 59 |
static VIEW vwright; /* right eye view */ |
| 60 |
|
| 61 |
static int rayqleft = 0; /* rays left to queue before flush */ |
| 62 |
|
| 63 |
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; |
| 67 |
|
| 68 |
static Display *ourdisplay = NULL; /* our display */ |
| 69 |
static XVisualInfo *ourvinf; /* our visual information */ |
| 70 |
static Window gwind = 0; /* our graphics window */ |
| 71 |
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 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(), eyeview(), |
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wipeclean(), setglpersp(), getmove(), fixwindow(), |
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pushright(), popright(), mytmflags(); |
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|
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extern time_t time(); |
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extern long getmonitor(); |
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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}; |
| 95 |
char *ev; |
| 96 |
double gamval = GAMMA; |
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RGBPRIMP dpri = stdprims; |
| 98 |
int firstevent, firsterror; |
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XSetWindowAttributes ourwinattr; |
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XWMHints ourxwmhints; |
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XSizeHints oursizhints; |
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/* open display server */ |
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ourdisplay = XOpenDisplay(NULL); |
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if (ourdisplay == NULL) |
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error(USER, "cannot open X-windows; DISPLAY variable set?\n"); |
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switch (XSGIQueryStereoMode(ourdisplay, ourroot)) { |
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case STEREO_TOP: |
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case STEREO_BOTTOM: |
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break; |
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case STEREO_OFF: |
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error(USER, |
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"wrong video mode: run \"/usr/gfx/setmon -n STR_TOP\" first"); |
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case X_STEREO_UNSUPPORTED: |
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error(USER, "stereo mode not supported on this screen"); |
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default: |
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error(INTERNAL, "unknown stereo mode"); |
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} |
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/* find a usable visual */ |
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ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlBest); |
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if (ourvinf == NULL) |
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error(USER, "no suitable visuals available"); |
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/* get a context */ |
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gctx = glXCreateContext(ourdisplay, ourvinf, NULL, GL_TRUE); |
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/* set gamma and tone mapping */ |
| 125 |
if ((ev = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL |
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|| (ev = getenv("DISPLAY_GAMMA")) != NULL) |
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gamval = atof(ev); |
| 128 |
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; |
| 139 |
ourwinattr.border_pixel = ourblack; |
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ourwinattr.event_mask = ourmask; |
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/* this is stupid */ |
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ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot, |
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ourvinf->visual, AllocNone); |
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gwind = XCreateWindow(ourdisplay, ourroot, 0, 0, |
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DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH, |
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(DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH)/2, |
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BORWIDTH, ourvinf->depth, InputOutput, ourvinf->visual, |
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CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &ourwinattr); |
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if (gwind == 0) |
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error(SYSTEM, "cannot create window\n"); |
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XStoreName(ourdisplay, gwind, id); |
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/* set window manager hints */ |
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ourxwmhints.flags = InputHint|IconPixmapHint; |
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ourxwmhints.input = True; |
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ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay, |
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gwind, x11icon_bits, x11icon_width, x11icon_height); |
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XSetWMHints(ourdisplay, gwind, &ourxwmhints); |
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oursizhints.min_width = MINWIDTH; |
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oursizhints.min_height = MINHEIGHT/2; |
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oursizhints.max_width = DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH; |
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oursizhints.max_height = (DisplayHeight(ourdisplay,ourscreen) - |
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2*BORWIDTH)/2; |
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oursizhints.flags = PMinSize|PMaxSize; |
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XSetNormalHints(ourdisplay, gwind, &oursizhints); |
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/* set GLX context */ |
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glXMakeCurrent(ourdisplay, gwind, gctx); |
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glEnable(GL_DEPTH_TEST); |
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glDepthFunc(GL_LEQUAL); |
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glShadeModel(GL_SMOOTH); |
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glDisable(GL_DITHER); |
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glDisable(GL_CULL_FACE); |
| 172 |
/* figure out sensible view */ |
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pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) / |
| 174 |
DisplayWidth(ourdisplay, ourscreen); |
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pheight = 2.0 * (double)DisplayHeightMM(ourdisplay, ourscreen) / |
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DisplayHeight(ourdisplay, ourscreen); |
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odev.v = stdview; |
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odev.v.type = VT_PER; |
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/* map the window */ |
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setstereobuf(STEREO_BUFFER_LEFT); |
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XMapWindow(ourdisplay, gwind); |
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dev_input(); /* sets size and view angles */ |
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/* allocate our samples */ |
| 184 |
if (!smInit(DisplayWidth(ourdisplay,ourscreen) * |
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DisplayHeight(ourdisplay,ourscreen) / 10)) |
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error(SYSTEM, "insufficient memory for value storage"); |
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odev.name = id; |
| 188 |
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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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.maxsamp); |
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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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if (!FEQ(nv->horiz,odev.v.horiz) || /* resize window? */ |
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!FEQ(nv->vert,odev.v.vert)) { |
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int dw = DisplayWidth(ourdisplay,ourscreen); |
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int dh = DisplayHeight(ourdisplay,ourscreen)/2; |
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|
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dw -= 25; /* for window frame */ |
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dh -= 50*2; |
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odev.hres = 2.*VIEWDIST/pwidth * |
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tan(PI/180./2.*nv->horiz); |
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odev.vres = 2.*VIEWDIST/pheight * |
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tan(PI/180./2.*nv->vert); |
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if (odev.hres > dw) { |
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odev.vres = dw * odev.vres / odev.hres; |
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odev.hres = dw; |
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} |
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if (odev.vres > dh) { |
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odev.hres = dh * odev.hres / odev.vres; |
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odev.vres = dh; |
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} |
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XResizeWindow(ourdisplay, gwind, odev.hres, odev.vres); |
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dev_input(); /* get resize event */ |
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} |
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odev.v = *nv; /* setview() already called */ |
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setglpersp(&odev.v); |
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vwright = *nv; |
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d = eyesepdist / sqrt(nv->hn2); |
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VSUM(vwright.vp, nv->vp, nv->hvec, d); |
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/* setview(&vwright); -- Unnecessary */ |
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checkglerr("setting view"); |
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} |
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wipeclean(); |
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return(1); |
| 263 |
} |
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|
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|
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dev_auxcom(cmd, args) /* process an auxiliary command */ |
| 267 |
char *cmd, *args; |
| 268 |
{ |
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sprintf(errmsg, "%s: unknown command", cmd); |
| 270 |
error(COMMAND, errmsg); |
| 271 |
} |
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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 */ |
| 276 |
int n; |
| 277 |
int hvres[2]; |
| 278 |
{ |
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hvres[0] = odev.hres; hvres[1] = odev.vres; |
| 280 |
if (n == 0) |
| 281 |
return(&odev.v); |
| 282 |
if (n == 1) |
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return(&vwright); |
| 284 |
return(NULL); |
| 285 |
} |
| 286 |
|
| 287 |
|
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int |
| 289 |
dev_input() /* get X11 input */ |
| 290 |
{ |
| 291 |
inpresflags = 0; |
| 292 |
|
| 293 |
do |
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getevent(); |
| 295 |
|
| 296 |
while (XQLength(ourdisplay) > 0); |
| 297 |
|
| 298 |
return(inpresflags); |
| 299 |
} |
| 300 |
|
| 301 |
|
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dev_value(c, p, v) /* add a pixel value to our quadtree */ |
| 303 |
COLR c; |
| 304 |
FVECT p, v; |
| 305 |
{ |
| 306 |
smNewsamp(c, p, v); /* add to display representation */ |
| 307 |
if (!--rayqleft) |
| 308 |
dev_flush(); /* flush output */ |
| 309 |
} |
| 310 |
|
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|
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int |
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dev_flush() /* flush output */ |
| 314 |
{ |
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pushright(); /* update right eye */ |
| 316 |
glClear(GL_DEPTH_BUFFER_BIT); |
| 317 |
smUpdate(&vwright, 100); |
| 318 |
popright(); /* update left eye */ |
| 319 |
glClear(GL_DEPTH_BUFFER_BIT); |
| 320 |
smUpdate(&odev.v, 100); |
| 321 |
glFlush(); /* flush OGL */ |
| 322 |
checkglerr("flushing display"); |
| 323 |
rayqleft = RAYQLEN; |
| 324 |
return(XPending(ourdisplay)); /* flush X11 and return # pending */ |
| 325 |
} |
| 326 |
|
| 327 |
|
| 328 |
checkglerr(where) /* check for GL or GLU error */ |
| 329 |
char *where; |
| 330 |
{ |
| 331 |
register GLenum errcode; |
| 332 |
|
| 333 |
while ((errcode = glGetError()) != GL_NO_ERROR) { |
| 334 |
sprintf(errmsg, "OpenGL error %s: %s", |
| 335 |
where, gluErrorString(errcode)); |
| 336 |
error(WARNING, errmsg); |
| 337 |
} |
| 338 |
} |
| 339 |
|
| 340 |
|
| 341 |
static |
| 342 |
pushright() /* push on right view */ |
| 343 |
{ |
| 344 |
double d; |
| 345 |
|
| 346 |
setstereobuf(STEREO_BUFFER_RIGHT); |
| 347 |
glMatrixMode(GL_MODELVIEW); |
| 348 |
glPushMatrix(); |
| 349 |
d = -eyesepdist / sqrt(odev.v.hn2); |
| 350 |
glTranslated(d*odev.v.hvec[0], d*odev.v.hvec[1], d*odev.v.hvec[2]); |
| 351 |
} |
| 352 |
|
| 353 |
|
| 354 |
static |
| 355 |
popright() /* pop off right view */ |
| 356 |
{ |
| 357 |
glMatrixMode(GL_MODELVIEW); |
| 358 |
glPopMatrix(); |
| 359 |
setstereobuf(STEREO_BUFFER_LEFT); |
| 360 |
} |
| 361 |
|
| 362 |
|
| 363 |
static int |
| 364 |
mytmflags() /* figure out tone mapping flags */ |
| 365 |
{ |
| 366 |
extern char *progname; |
| 367 |
register char *cp, *tail; |
| 368 |
/* find basic name */ |
| 369 |
for (cp = tail = progname; *cp; cp++) |
| 370 |
if (*cp == '/') |
| 371 |
tail = cp+1; |
| 372 |
for (cp = tail; *cp && *cp != '.'; cp++) |
| 373 |
; |
| 374 |
if (cp-tail == 3 && !strncmp(tail, "glx2", 3)) |
| 375 |
return(TM_F_CAMERA|TM_F_NOSTDERR); |
| 376 |
if (cp-tail == 4 && !strncmp(tail, "glx2h", 4)) |
| 377 |
return(TM_F_HUMAN|TM_F_NOSTDERR); |
| 378 |
error(USER, "illegal driver name"); |
| 379 |
} |
| 380 |
|
| 381 |
|
| 382 |
static |
| 383 |
getevent() /* get next event */ |
| 384 |
{ |
| 385 |
XNextEvent(ourdisplay, levptr(XEvent)); |
| 386 |
switch (levptr(XEvent)->type) { |
| 387 |
case ConfigureNotify: |
| 388 |
resizewindow(levptr(XConfigureEvent)); |
| 389 |
break; |
| 390 |
case UnmapNotify: |
| 391 |
mapped = 0; |
| 392 |
break; |
| 393 |
case MapNotify: |
| 394 |
mapped = 1; |
| 395 |
break; |
| 396 |
case Expose: |
| 397 |
fixwindow(levptr(XExposeEvent)); |
| 398 |
break; |
| 399 |
case KeyPress: |
| 400 |
getkey(levptr(XKeyPressedEvent)); |
| 401 |
break; |
| 402 |
case ButtonPress: |
| 403 |
getmove(levptr(XButtonPressedEvent)); |
| 404 |
break; |
| 405 |
} |
| 406 |
} |
| 407 |
|
| 408 |
|
| 409 |
static |
| 410 |
draw3dline(wp) /* draw 3d line in world coordinates */ |
| 411 |
register FVECT wp[2]; |
| 412 |
{ |
| 413 |
glVertex3d(wp[0][0], wp[0][1], wp[0][2]); |
| 414 |
glVertex3d(wp[1][0], wp[1][1], wp[1][2]); |
| 415 |
} |
| 416 |
|
| 417 |
|
| 418 |
static |
| 419 |
draw_grids() /* draw holodeck section grids */ |
| 420 |
{ |
| 421 |
static BYTE gridrgba[4] = {0x0, 0xff, 0xff, 0x00}; |
| 422 |
|
| 423 |
if (!mapped) |
| 424 |
return; |
| 425 |
glColor4ub(gridrgba[0], gridrgba[1], gridrgba[2], gridrgba[3]); |
| 426 |
glBegin(GL_LINES); /* draw each grid line */ |
| 427 |
gridlines(draw3dline); |
| 428 |
glEnd(); |
| 429 |
} |
| 430 |
|
| 431 |
|
| 432 |
static |
| 433 |
moveview(dx, dy, mov, orb) /* move our view */ |
| 434 |
int dx, dy, mov, orb; |
| 435 |
{ |
| 436 |
VIEW nv; |
| 437 |
FVECT odir, v1; |
| 438 |
double d; |
| 439 |
register int li; |
| 440 |
/* start with old view */ |
| 441 |
nv = odev.v; |
| 442 |
/* change view direction */ |
| 443 |
if (viewray(v1, odir, &odev.v, |
| 444 |
(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY) |
| 445 |
return(0); /* outside view */ |
| 446 |
if (mov | orb) { |
| 447 |
if ((li = smFindsamp(v1, odir)) < 0) |
| 448 |
return(0); /* not on window */ |
| 449 |
VSUM(odir, rsL.wp[li], nv.vp, -1.); |
| 450 |
} else |
| 451 |
VCOPY(nv.vdir, odir); |
| 452 |
if (orb && mov) { /* orbit left/right */ |
| 453 |
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov); |
| 454 |
VSUM(nv.vp, rsL.wp[li], odir, -1.); |
| 455 |
spinvector(nv.vdir, nv.vdir, nv.vup, d); |
| 456 |
} else if (orb) { /* orbit up/down */ |
| 457 |
fcross(v1, odir, nv.vup); |
| 458 |
if (normalize(v1) == 0.) |
| 459 |
return(0); |
| 460 |
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb); |
| 461 |
VSUM(nv.vp, rsL.wp[li], odir, -1.); |
| 462 |
spinvector(nv.vdir, nv.vdir, v1, d); |
| 463 |
} else if (mov) { /* move forward/backward */ |
| 464 |
d = MOVPCT/100. * mov; |
| 465 |
VSUM(nv.vp, nv.vp, odir, d); |
| 466 |
} |
| 467 |
if (!mov ^ !orb && headlocked) { /* restore head height */ |
| 468 |
VSUM(v1, odev.v.vp, nv.vp, -1.); |
| 469 |
d = DOT(v1, odev.v.vup); |
| 470 |
VSUM(nv.vp, nv.vp, odev.v.vup, d); |
| 471 |
} |
| 472 |
if (setview(&nv) != NULL) |
| 473 |
return(0); /* illegal view */ |
| 474 |
dev_view(&nv); |
| 475 |
inpresflags |= DFL(DC_SETVIEW); |
| 476 |
return(1); |
| 477 |
} |
| 478 |
|
| 479 |
|
| 480 |
static |
| 481 |
getmove(ebut) /* get view change */ |
| 482 |
XButtonPressedEvent *ebut; |
| 483 |
{ |
| 484 |
int movdir = MOVDIR(ebut->button); |
| 485 |
int movorb = MOVORB(ebut->state); |
| 486 |
int qlevel = 100; |
| 487 |
time_t lasttime, thistime; |
| 488 |
int nframes; |
| 489 |
Window rootw, childw; |
| 490 |
int rootx, rooty, wx, wy; |
| 491 |
unsigned int statemask; |
| 492 |
|
| 493 |
XNoOp(ourdisplay); |
| 494 |
|
| 495 |
lasttime = time(0); nframes = 0; |
| 496 |
while (!XCheckMaskEvent(ourdisplay, |
| 497 |
ButtonReleaseMask, levptr(XEvent))) { |
| 498 |
|
| 499 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
| 500 |
&rootx, &rooty, &wx, &wy, &statemask)) |
| 501 |
break; /* on another screen */ |
| 502 |
|
| 503 |
if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) { |
| 504 |
sleep(1); |
| 505 |
lasttime++; |
| 506 |
continue; |
| 507 |
} |
| 508 |
pushright(); |
| 509 |
draw_grids(); |
| 510 |
smUpdate(&vwright, qlevel); |
| 511 |
popright(); |
| 512 |
draw_grids(); |
| 513 |
smUpdate(&odev.v, qlevel); |
| 514 |
glFlush(); |
| 515 |
checkglerr("moving view"); |
| 516 |
nframes++; |
| 517 |
thistime = time(0); |
| 518 |
if (thistime - lasttime >= 3 || |
| 519 |
nframes > (int)(3*3*TARGETFPS)) { |
| 520 |
qlevel = thistime<=lasttime ? 1000 : |
| 521 |
(int)((double)nframes/(thistime-lasttime) |
| 522 |
/ TARGETFPS * qlevel + 0.5); |
| 523 |
lasttime = thistime; nframes = 0; |
| 524 |
if (qlevel > 100) { |
| 525 |
if (qlevel > 300) { /* put on the brakes */ |
| 526 |
sleep(1); |
| 527 |
lasttime++; |
| 528 |
} |
| 529 |
qlevel = 100; |
| 530 |
} else if (qlevel < 1) |
| 531 |
qlevel = 1; |
| 532 |
} |
| 533 |
} |
| 534 |
if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */ |
| 535 |
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
| 536 |
wx = levptr(XButtonReleasedEvent)->x; |
| 537 |
wy = levptr(XButtonReleasedEvent)->y; |
| 538 |
moveview(wx, odev.vres-1-wy, movdir, movorb); |
| 539 |
} |
| 540 |
} |
| 541 |
|
| 542 |
|
| 543 |
static |
| 544 |
setglpersp(vp) /* set perspective view in GL */ |
| 545 |
register VIEW *vp; |
| 546 |
{ |
| 547 |
double d, xmin, xmax, ymin, ymax, zmin, zmax; |
| 548 |
|
| 549 |
zmin = 0.1; |
| 550 |
zmax = 1000.; |
| 551 |
if (odev.v.vfore > FTINY) |
| 552 |
zmin = odev.v.vfore; |
| 553 |
if (odev.v.vaft > FTINY) |
| 554 |
zmax = odev.v.vaft; |
| 555 |
xmax = zmin * tan(PI/180./2. * odev.v.horiz); |
| 556 |
xmin = -xmax; |
| 557 |
d = odev.v.hoff * (xmax - xmin); |
| 558 |
xmin += d; xmax += d; |
| 559 |
ymax = zmin * tan(PI/180./2. * odev.v.vert); |
| 560 |
ymin = -ymax; |
| 561 |
d = odev.v.voff * (ymax - ymin); |
| 562 |
ymin += d; ymax += d; |
| 563 |
/* set view matrix */ |
| 564 |
glMatrixMode(GL_PROJECTION); |
| 565 |
glLoadIdentity(); |
| 566 |
glFrustum(xmin, xmax, ymin, ymax, zmin, zmax); |
| 567 |
gluLookAt(odev.v.vp[0], odev.v.vp[1], odev.v.vp[2], |
| 568 |
odev.v.vp[0] + odev.v.vdir[0], |
| 569 |
odev.v.vp[1] + odev.v.vdir[1], |
| 570 |
odev.v.vp[2] + odev.v.vdir[2], |
| 571 |
odev.v.vup[0], odev.v.vup[1], odev.v.vup[2]); |
| 572 |
} |
| 573 |
|
| 574 |
|
| 575 |
wipeclean() /* prepare for redraw */ |
| 576 |
{ |
| 577 |
setstereobuf(STEREO_BUFFER_RIGHT); |
| 578 |
glClear(GL_DEPTH_BUFFER_BIT); |
| 579 |
setstereobuf(STEREO_BUFFER_LEFT); |
| 580 |
glClear(GL_DEPTH_BUFFER_BIT); |
| 581 |
smClean(); |
| 582 |
} |
| 583 |
|
| 584 |
|
| 585 |
static |
| 586 |
getkey(ekey) /* get input key */ |
| 587 |
register XKeyPressedEvent *ekey; |
| 588 |
{ |
| 589 |
int n; |
| 590 |
char buf[8]; |
| 591 |
|
| 592 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
| 593 |
if (n != 1) |
| 594 |
return; |
| 595 |
switch (buf[0]) { |
| 596 |
case 'h': /* turn on height motion lock */ |
| 597 |
headlocked = 1; |
| 598 |
return; |
| 599 |
case 'H': /* turn off height motion lock */ |
| 600 |
headlocked = 0; |
| 601 |
return; |
| 602 |
case 'l': /* retrieve last view */ |
| 603 |
inpresflags |= DFL(DC_LASTVIEW); |
| 604 |
return; |
| 605 |
case 'p': /* pause computation */ |
| 606 |
inpresflags |= DFL(DC_PAUSE); |
| 607 |
return; |
| 608 |
case 'v': /* spit out view */ |
| 609 |
inpresflags |= DFL(DC_GETVIEW); |
| 610 |
return; |
| 611 |
case '\n': |
| 612 |
case '\r': /* resume computation */ |
| 613 |
inpresflags |= DFL(DC_RESUME); |
| 614 |
return; |
| 615 |
case CTRL('R'): /* redraw screen */ |
| 616 |
wipeclean(); |
| 617 |
return; |
| 618 |
case CTRL('L'): /* refresh from server */ |
| 619 |
if (inpresflags & DFL(DC_REDRAW)) |
| 620 |
return; |
| 621 |
eyeview(VWRIGHT); |
| 622 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| 623 |
draw_grids(); |
| 624 |
eyeview(VWLEFT); |
| 625 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| 626 |
draw_grids(); |
| 627 |
glFlush(); |
| 628 |
smInit(rsL.maxsamp); /* get rid of old values */ |
| 629 |
inpresflags |= DFL(DC_REDRAW); /* resend values from server */ |
| 630 |
rayqleft = 0; /* hold off update */ |
| 631 |
return; |
| 632 |
case 'K': /* kill rtrace process(es) */ |
| 633 |
inpresflags |= DFL(DC_KILL); |
| 634 |
break; |
| 635 |
case 'R': /* restart rtrace */ |
| 636 |
inpresflags |= DFL(DC_RESTART); |
| 637 |
break; |
| 638 |
case 'C': /* clobber holodeck */ |
| 639 |
inpresflags |= DFL(DC_CLOBBER); |
| 640 |
break; |
| 641 |
case 'q': /* quit the program */ |
| 642 |
inpresflags |= DFL(DC_QUIT); |
| 643 |
return; |
| 644 |
default: |
| 645 |
XBell(ourdisplay, 0); |
| 646 |
return; |
| 647 |
} |
| 648 |
} |
| 649 |
|
| 650 |
|
| 651 |
static |
| 652 |
fixwindow(eexp) /* repair damage to window */ |
| 653 |
register XExposeEvent *eexp; |
| 654 |
{ |
| 655 |
if (odev.hres == 0 | odev.vres == 0) { /* first exposure */ |
| 656 |
resizewindow((XConfigureEvent *)eexp); |
| 657 |
return; |
| 658 |
} |
| 659 |
if (eexp->count) /* wait for final exposure */ |
| 660 |
return; |
| 661 |
wipeclean(); /* clear depth */ |
| 662 |
} |
| 663 |
|
| 664 |
|
| 665 |
static |
| 666 |
resizewindow(ersz) /* resize window */ |
| 667 |
register XConfigureEvent *ersz; |
| 668 |
{ |
| 669 |
/* glViewport(0, 0, ersz->width, ersz->height); */ |
| 670 |
|
| 671 |
if (ersz->width == odev.hres && ersz->height == odev.vres) |
| 672 |
return; |
| 673 |
|
| 674 |
odev.hres = ersz->width; |
| 675 |
odev.vres = ersz->height; |
| 676 |
|
| 677 |
odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres); |
| 678 |
odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres); |
| 679 |
|
| 680 |
inpresflags |= DFL(DC_SETVIEW); |
| 681 |
} |
