| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: rhd_glx.c,v 3.29 2003/02/22 02:07:24 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* OpenGL GLX driver for holodeck display. |
| 6 |
* Based on old GLX driver using cones. |
| 7 |
* |
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* Define symbol STEREO for stereo viewing. |
| 9 |
* Define symbol DOBJ for display object viewing. |
| 10 |
*/ |
| 11 |
|
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#ifdef NOSTEREO |
| 13 |
#ifdef STEREO |
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#undef STEREO |
| 15 |
#else |
| 16 |
#undef NOSTEREO |
| 17 |
#endif |
| 18 |
#endif |
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|
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#include "standard.h" |
| 21 |
|
| 22 |
#include <GL/glx.h> |
| 23 |
#include <GL/glu.h> |
| 24 |
#ifdef STEREO |
| 25 |
#include <X11/extensions/SGIStereo.h> |
| 26 |
#endif |
| 27 |
|
| 28 |
#include "rhd_sample.h" |
| 29 |
#ifdef DOBJ |
| 30 |
#include "rhdobj.h" |
| 31 |
#endif |
| 32 |
|
| 33 |
#include "x11icon.h" |
| 34 |
|
| 35 |
#ifndef RAYQLEN |
| 36 |
#define RAYQLEN 1024 /* max. rays to queue before flush */ |
| 37 |
#endif |
| 38 |
|
| 39 |
#ifndef FEQ |
| 40 |
#define FEQ(a,b) ((a)-(b) <= FTINY && (a)-(b) >= -FTINY) |
| 41 |
#endif |
| 42 |
|
| 43 |
#define GAMMA 1.4 /* default gamma correction */ |
| 44 |
|
| 45 |
#define FRAMESTATE(s) (((s)&(ShiftMask|ControlMask))==(ShiftMask|ControlMask)) |
| 46 |
|
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#define MOVPCT 7 /* percent distance to move /frame */ |
| 48 |
#define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1) |
| 49 |
#define MOVDEG (-5) /* degrees to orbit CW/down /frame */ |
| 50 |
#define MOVORB(s) ((s)&ShiftMask ? 1 : (s)&ControlMask ? -1 : 0) |
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|
| 52 |
#ifndef TARGETFPS |
| 53 |
#define TARGETFPS 2.0 /* target frames/sec during motion */ |
| 54 |
#endif |
| 55 |
|
| 56 |
#define MINWIDTH 480 /* minimum graphics window width */ |
| 57 |
#define MINHEIGHT 400 /* minimum graphics window height */ |
| 58 |
|
| 59 |
#define VIEWDIST 356 /* assumed viewing distance (mm) */ |
| 60 |
|
| 61 |
#define BORWIDTH 5 /* border width */ |
| 62 |
|
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#define setstereobuf(bid) (glXWaitGL(), \ |
| 64 |
XSGISetStereoBuffer(ourdisplay, gwind, bid), \ |
| 65 |
glXWaitX()) |
| 66 |
|
| 67 |
#define ourscreen DefaultScreen(ourdisplay) |
| 68 |
#define ourroot RootWindow(ourdisplay,ourscreen) |
| 69 |
#define ourmask (StructureNotifyMask|ExposureMask|KeyPressMask|\ |
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ButtonPressMask|ButtonReleaseMask) |
| 71 |
|
| 72 |
#define levptr(etype) ((etype *)¤tevent) |
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|
| 74 |
struct driver odev; /* global device driver structure */ |
| 75 |
|
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char odev_args[64]; /* command arguments */ |
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|
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#ifdef STEREO |
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static VIEW vwright; /* right eye view */ |
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#endif |
| 81 |
|
| 82 |
static int rayqleft = 0; /* rays left to queue before flush */ |
| 83 |
|
| 84 |
static XEvent currentevent; /* current event */ |
| 85 |
|
| 86 |
static int mapped = 0; /* window is mapped? */ |
| 87 |
static unsigned long ourblack=0, ourwhite=~0; |
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|
| 89 |
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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|
| 94 |
static double pwidth, pheight; /* pixel dimensions (mm) */ |
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|
| 96 |
static double mindpth, maxdpth; /* min. and max. depth */ |
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|
| 98 |
double dev_zmin, dev_zmax; /* fore and aft clipping plane dist. */ |
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|
| 100 |
static int inpresflags; /* input result flags */ |
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|
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static int headlocked = 0; /* lock vertical motion */ |
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|
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static int resizewindow(), getevent(), getkey(), moveview(), wipeclean(), |
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setglpersp(), getframe(), getmove(), fixwindow(), mytmflags(); |
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|
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#ifdef STEREO |
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static int pushright(), popright(); |
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#endif |
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static double getdistance(); |
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#define mapdepth(d) ((d)> 0.9995 ? FHUGE: dev_zmin/ \ |
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(1.-(d)*(1.-dev_zmin/dev_zmax))) |
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|
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extern time_t time(); |
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|
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|
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dev_open(id) /* initialize GLX driver */ |
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char *id; |
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{ |
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extern char *getenv(); |
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static RGBPRIMS myprims = STDPRIMS; |
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static int atlBest[] = {GLX_RGBA, GLX_RED_SIZE,8, |
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GLX_GREEN_SIZE,8, GLX_BLUE_SIZE,8, |
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GLX_DEPTH_SIZE,15, None}; |
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char *ev; |
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double gamval = GAMMA; |
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RGBPRIMP dpri = stdprims; |
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XSetWindowAttributes ourwinattr; |
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XWMHints ourxwmhints; |
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XSizeHints oursizhints; |
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/* check for unsupported stereo */ |
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#ifdef NOSTEREO |
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error(INTERNAL, "stereo display driver unavailable"); |
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#endif |
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/* open display server */ |
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ourdisplay = XOpenDisplay(NULL); |
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if (ourdisplay == NULL) |
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error(USER, "cannot open X-windows; DISPLAY variable set?\n"); |
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#ifdef STEREO |
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switch (XSGIQueryStereoMode(ourdisplay, ourroot)) { |
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case STEREO_TOP: |
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case STEREO_BOTTOM: |
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break; |
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case STEREO_OFF: |
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error(USER, |
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"wrong video mode: run \"/usr/gfx/setmon -n STR_TOP\" first"); |
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case X_STEREO_UNSUPPORTED: |
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error(USER, "stereo mode not supported on this screen"); |
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default: |
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error(INTERNAL, "unknown stereo mode"); |
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} |
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#endif |
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/* find a usable visual */ |
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ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlBest); |
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if (ourvinf == NULL) |
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error(USER, "no suitable visuals available"); |
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/* get a context */ |
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gctx = glXCreateContext(ourdisplay, ourvinf, NULL, GL_TRUE); |
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/* set gamma and tone mapping */ |
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if ((ev = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL |
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|| (ev = getenv("DISPLAY_GAMMA")) != NULL) |
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gamval = atof(ev); |
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if ((ev = getenv("DISPLAY_PRIMARIES")) != NULL && |
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sscanf(ev, "%f %f %f %f %f %f %f %f", |
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&myprims[RED][CIEX],&myprims[RED][CIEY], |
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&myprims[GRN][CIEX],&myprims[GRN][CIEY], |
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&myprims[BLU][CIEX],&myprims[BLU][CIEY], |
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&myprims[WHT][CIEX],&myprims[WHT][CIEY]) >= 6) |
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dpri = myprims; |
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if (tmInit(mytmflags(), dpri, gamval) == NULL) |
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error(SYSTEM, "not enough memory in dev_open"); |
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/* open window */ |
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ourwinattr.background_pixel = ourblack; |
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ourwinattr.border_pixel = ourblack; |
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ourwinattr.event_mask = ourmask; |
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/* this is stupid */ |
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ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot, |
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ourvinf->visual, AllocNone); |
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gwind = XCreateWindow(ourdisplay, ourroot, 0, 0, |
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DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH, |
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#ifdef STEREO |
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(DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH)/2, |
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#else |
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DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH, |
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#endif |
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BORWIDTH, ourvinf->depth, InputOutput, ourvinf->visual, |
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CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &ourwinattr); |
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if (gwind == 0) |
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error(SYSTEM, "cannot create window\n"); |
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XStoreName(ourdisplay, gwind, id); |
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/* set window manager hints */ |
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ourxwmhints.flags = InputHint|IconPixmapHint; |
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ourxwmhints.input = True; |
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ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay, |
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gwind, x11icon_bits, x11icon_width, x11icon_height); |
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XSetWMHints(ourdisplay, gwind, &ourxwmhints); |
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oursizhints.min_width = MINWIDTH; |
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#ifdef STEREO |
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oursizhints.min_height = MINHEIGHT/2; |
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oursizhints.max_width = DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH; |
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oursizhints.max_height = (DisplayHeight(ourdisplay,ourscreen) - |
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2*BORWIDTH)/2; |
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oursizhints.flags = PMinSize|PMaxSize; |
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#else |
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oursizhints.min_height = MINHEIGHT; |
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oursizhints.flags = PMinSize; |
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#endif |
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XSetNormalHints(ourdisplay, gwind, &oursizhints); |
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/* set GLX context */ |
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glXMakeCurrent(ourdisplay, gwind, gctx); |
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glEnable(GL_DEPTH_TEST); |
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glDepthFunc(GL_LEQUAL); |
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glShadeModel(GL_SMOOTH); |
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glDisable(GL_DITHER); |
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glDisable(GL_CULL_FACE); |
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/* figure out sensible view */ |
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pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) / |
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DisplayWidth(ourdisplay, ourscreen); |
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pheight = (double)DisplayHeightMM(ourdisplay, ourscreen) / |
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DisplayHeight(ourdisplay, ourscreen); |
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#ifdef STEREO |
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pheight *= 2.; |
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setstereobuf(STEREO_BUFFER_LEFT); |
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#endif |
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checkglerr("setting rendering parameters"); |
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odev.v = stdview; |
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odev.v.type = VT_PER; |
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/* map the window */ |
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XMapWindow(ourdisplay, gwind); |
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dev_input(); /* sets size and view angles */ |
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/* allocate our samples */ |
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if (!smInit(DisplayWidth(ourdisplay,ourscreen) * |
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DisplayHeight(ourdisplay,ourscreen) / 10)) |
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error(SYSTEM, "insufficient memory for value storage"); |
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mindpth = FHUGE; maxdpth = FTINY; |
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odev.name = id; |
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odev.ifd = ConnectionNumber(ourdisplay); |
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} |
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|
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|
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dev_close() /* close our display and free resources */ |
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{ |
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smInit(0); |
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#ifdef DOBJ |
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dobj_cleanup(); |
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#endif |
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glXMakeCurrent(ourdisplay, None, NULL); |
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glXDestroyContext(ourdisplay, gctx); |
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XDestroyWindow(ourdisplay, gwind); |
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gwind = 0; |
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XCloseDisplay(ourdisplay); |
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ourdisplay = NULL; |
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tmDone(NULL); |
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odev.v.type = 0; |
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odev.hres = odev.vres = 0; |
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odev.ifd = -1; |
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} |
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|
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|
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dev_clear() /* clear our representation */ |
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{ |
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smInit(rsL.max_samp); |
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wipeclean(1); |
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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); |
| 281 |
} |
| 282 |
if (nv != &odev.v) { |
| 283 |
/* resize window? */ |
| 284 |
if (!FEQ(nv->horiz,odev.v.horiz) || |
| 285 |
!FEQ(nv->vert,odev.v.vert)) { |
| 286 |
int dw = DisplayWidth(ourdisplay,ourscreen); |
| 287 |
int dh = DisplayHeight(ourdisplay,ourscreen); |
| 288 |
|
| 289 |
dw -= 25; /* for window frame */ |
| 290 |
dh -= 50; |
| 291 |
#ifdef STEREO |
| 292 |
dh /= 2; |
| 293 |
#endif |
| 294 |
odev.hres = 2.*VIEWDIST/pwidth * |
| 295 |
tan(PI/180./2.*nv->horiz); |
| 296 |
odev.vres = 2.*VIEWDIST/pheight * |
| 297 |
tan(PI/180./2.*nv->vert); |
| 298 |
if (odev.hres > dw) { |
| 299 |
odev.vres = dw * odev.vres / odev.hres; |
| 300 |
odev.hres = dw; |
| 301 |
} |
| 302 |
if (odev.vres > dh) { |
| 303 |
odev.hres = dh * odev.hres / odev.vres; |
| 304 |
odev.vres = dh; |
| 305 |
} |
| 306 |
XResizeWindow(ourdisplay, gwind, odev.hres, odev.vres); |
| 307 |
dev_input(); /* get resize event */ |
| 308 |
} |
| 309 |
odev.v = *nv; /* setview() already called */ |
| 310 |
} |
| 311 |
#ifdef STEREO |
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vwright = *nv; |
| 313 |
d = eyesepdist / sqrt(nv->hn2); |
| 314 |
VSUM(vwright.vp, nv->vp, nv->hvec, d); |
| 315 |
/* setview(&vwright); -- Unnecessary */ |
| 316 |
#endif |
| 317 |
wipeclean(0); |
| 318 |
return(1); |
| 319 |
} |
| 320 |
|
| 321 |
|
| 322 |
dev_section(gfn, pfn) /* add octree for geometry rendering */ |
| 323 |
char *gfn, *pfn; |
| 324 |
{ |
| 325 |
/* unimplemented */ |
| 326 |
} |
| 327 |
|
| 328 |
|
| 329 |
dev_auxcom(cmd, args) /* process an auxiliary command */ |
| 330 |
char *cmd, *args; |
| 331 |
{ |
| 332 |
#ifdef DOBJ |
| 333 |
if (dobj_command(cmd, args) >= 0) |
| 334 |
return; |
| 335 |
#endif |
| 336 |
sprintf(errmsg, "%s: unknown command", cmd); |
| 337 |
error(COMMAND, errmsg); |
| 338 |
} |
| 339 |
|
| 340 |
|
| 341 |
VIEW * |
| 342 |
dev_auxview(n, hvres) /* return nth auxiliary view */ |
| 343 |
int n; |
| 344 |
int hvres[2]; |
| 345 |
{ |
| 346 |
hvres[0] = odev.hres; hvres[1] = odev.vres; |
| 347 |
if (n == 0) |
| 348 |
return(&odev.v); |
| 349 |
#ifdef STEREO |
| 350 |
if (n == 1) |
| 351 |
return(&vwright); |
| 352 |
#endif |
| 353 |
return(NULL); |
| 354 |
} |
| 355 |
|
| 356 |
|
| 357 |
int |
| 358 |
dev_input() /* get X11 input */ |
| 359 |
{ |
| 360 |
inpresflags = 0; |
| 361 |
|
| 362 |
do |
| 363 |
getevent(); |
| 364 |
|
| 365 |
while (XPending(ourdisplay) > 0); |
| 366 |
|
| 367 |
odev.inpready = 0; |
| 368 |
|
| 369 |
return(inpresflags); |
| 370 |
} |
| 371 |
|
| 372 |
|
| 373 |
dev_value(c, d, p) /* add a pixel value to our mesh */ |
| 374 |
COLR c; |
| 375 |
FVECT d, p; |
| 376 |
{ |
| 377 |
double depth; |
| 378 |
#ifdef DOBJ |
| 379 |
if (dobj_lightsamp != NULL) { /* in light source sampling */ |
| 380 |
(*dobj_lightsamp)(c, d, p); |
| 381 |
return; |
| 382 |
} |
| 383 |
#endif |
| 384 |
if (p != NULL) { /* add depth to our range */ |
| 385 |
depth = (p[0] - odev.v.vp[0])*d[0] + |
| 386 |
(p[1] - odev.v.vp[1])*d[1] + |
| 387 |
(p[2] - odev.v.vp[2])*d[2]; |
| 388 |
if (depth > FTINY) { |
| 389 |
if (depth < mindpth) |
| 390 |
mindpth = depth; |
| 391 |
if (depth > maxdpth) |
| 392 |
maxdpth = depth; |
| 393 |
} |
| 394 |
} |
| 395 |
smNewSamp(c, d, p); /* add to display representation */ |
| 396 |
if (!--rayqleft) |
| 397 |
dev_flush(); /* flush output */ |
| 398 |
} |
| 399 |
|
| 400 |
|
| 401 |
int |
| 402 |
dev_flush() /* flush output */ |
| 403 |
{ |
| 404 |
if (mapped) { |
| 405 |
#ifdef STEREO |
| 406 |
pushright(); /* update right eye */ |
| 407 |
smUpdate(&vwright, MAXQUALITY); |
| 408 |
#ifdef DOBJ |
| 409 |
dobj_render(); /* usually in foreground */ |
| 410 |
#endif |
| 411 |
popright(); /* update left eye */ |
| 412 |
#endif |
| 413 |
smUpdate(&odev.v, MAXQUALITY); |
| 414 |
checkglerr("rendering mesh"); |
| 415 |
#ifdef DOBJ |
| 416 |
dobj_render(); |
| 417 |
#endif |
| 418 |
glFlush(); /* flush OGL */ |
| 419 |
} |
| 420 |
rayqleft = RAYQLEN; |
| 421 |
/* flush X11 and return # pending */ |
| 422 |
return(odev.inpready = XPending(ourdisplay)); |
| 423 |
} |
| 424 |
|
| 425 |
|
| 426 |
checkglerr(where) /* check for GL or GLU error */ |
| 427 |
char *where; |
| 428 |
{ |
| 429 |
register GLenum errcode; |
| 430 |
|
| 431 |
while ((errcode = glGetError()) != GL_NO_ERROR) { |
| 432 |
sprintf(errmsg, "OpenGL error %s: %s", |
| 433 |
where, gluErrorString(errcode)); |
| 434 |
error(WARNING, errmsg); |
| 435 |
} |
| 436 |
} |
| 437 |
|
| 438 |
|
| 439 |
#ifdef STEREO |
| 440 |
static |
| 441 |
pushright() /* push on right view */ |
| 442 |
{ |
| 443 |
double d; |
| 444 |
|
| 445 |
setstereobuf(STEREO_BUFFER_RIGHT); |
| 446 |
glMatrixMode(GL_MODELVIEW); |
| 447 |
glPushMatrix(); |
| 448 |
d = -eyesepdist / sqrt(odev.v.hn2); |
| 449 |
glTranslated(d*odev.v.hvec[0], d*odev.v.hvec[1], d*odev.v.hvec[2]); |
| 450 |
checkglerr("setting right view"); |
| 451 |
} |
| 452 |
|
| 453 |
|
| 454 |
static |
| 455 |
popright() /* pop off right view */ |
| 456 |
{ |
| 457 |
glMatrixMode(GL_MODELVIEW); |
| 458 |
glPopMatrix(); |
| 459 |
setstereobuf(STEREO_BUFFER_LEFT); |
| 460 |
} |
| 461 |
#endif |
| 462 |
|
| 463 |
|
| 464 |
static int |
| 465 |
mytmflags() /* figure out tone mapping flags */ |
| 466 |
{ |
| 467 |
extern char *progname; |
| 468 |
register char *cp, *tail; |
| 469 |
/* find basic name */ |
| 470 |
for (cp = tail = progname; *cp; cp++) |
| 471 |
if (*cp == '/') |
| 472 |
tail = cp+1; |
| 473 |
for (cp = tail; *cp && *cp != '.'; cp++) |
| 474 |
; |
| 475 |
if (cp > tail && cp[-1] == 'h') |
| 476 |
return(TM_F_HUMAN|TM_F_NOSTDERR); |
| 477 |
else |
| 478 |
return(TM_F_CAMERA|TM_F_NOSTDERR); |
| 479 |
} |
| 480 |
|
| 481 |
|
| 482 |
static |
| 483 |
getevent() /* get next event */ |
| 484 |
{ |
| 485 |
XNextEvent(ourdisplay, levptr(XEvent)); |
| 486 |
switch (levptr(XEvent)->type) { |
| 487 |
case ConfigureNotify: |
| 488 |
resizewindow(levptr(XConfigureEvent)); |
| 489 |
break; |
| 490 |
case UnmapNotify: |
| 491 |
mapped = 0; |
| 492 |
break; |
| 493 |
case MapNotify: |
| 494 |
mapped = 1; |
| 495 |
break; |
| 496 |
case Expose: |
| 497 |
fixwindow(levptr(XExposeEvent)); |
| 498 |
break; |
| 499 |
case KeyPress: |
| 500 |
getkey(levptr(XKeyPressedEvent)); |
| 501 |
break; |
| 502 |
case ButtonPress: |
| 503 |
if (FRAMESTATE(levptr(XButtonPressedEvent)->state)) |
| 504 |
getframe(levptr(XButtonPressedEvent)); |
| 505 |
else |
| 506 |
getmove(levptr(XButtonPressedEvent)); |
| 507 |
break; |
| 508 |
} |
| 509 |
} |
| 510 |
|
| 511 |
|
| 512 |
static |
| 513 |
draw3dline(wp) /* draw 3d line in world coordinates */ |
| 514 |
register FVECT wp[2]; |
| 515 |
{ |
| 516 |
glVertex3d(wp[0][0], wp[0][1], wp[0][2]); |
| 517 |
glVertex3d(wp[1][0], wp[1][1], wp[1][2]); |
| 518 |
} |
| 519 |
|
| 520 |
|
| 521 |
static |
| 522 |
draw_grids(fore) /* draw holodeck section grids */ |
| 523 |
int fore; |
| 524 |
{ |
| 525 |
if (fore) |
| 526 |
glColor4ub(0, 255, 255, 0); |
| 527 |
else |
| 528 |
glColor4ub(0, 0, 0, 0); |
| 529 |
glBegin(GL_LINES); /* draw each grid line */ |
| 530 |
gridlines(draw3dline); |
| 531 |
glEnd(); |
| 532 |
checkglerr("drawing grid lines"); |
| 533 |
} |
| 534 |
|
| 535 |
static double |
| 536 |
getdistance(dx, dy, direc) /* distance from fore plane along view ray */ |
| 537 |
int dx, dy; |
| 538 |
FVECT direc; |
| 539 |
{ |
| 540 |
GLfloat gldepth; |
| 541 |
double dist; |
| 542 |
|
| 543 |
if (dx<0 | dx>=odev.hres | dy<0 | dy>=odev.vres) |
| 544 |
return(FHUGE); |
| 545 |
glReadPixels(dx,dy, 1,1, GL_DEPTH_COMPONENT,GL_FLOAT, &gldepth); |
| 546 |
dist = mapdepth(gldepth); |
| 547 |
if (dist >= .99*FHUGE) |
| 548 |
return(FHUGE); |
| 549 |
return((dist-odev.v.vfore)/DOT(direc,odev.v.vdir)); |
| 550 |
} |
| 551 |
|
| 552 |
|
| 553 |
static |
| 554 |
moveview(dx, dy, mov, orb) /* move our view */ |
| 555 |
int dx, dy, mov, orb; |
| 556 |
{ |
| 557 |
VIEW nv; |
| 558 |
FVECT odir, v1, wip; |
| 559 |
double d,d1; |
| 560 |
register int li; |
| 561 |
/* start with old view */ |
| 562 |
nv = odev.v; |
| 563 |
/* orient our motion */ |
| 564 |
if (viewray(v1, odir, &odev.v, |
| 565 |
(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY) |
| 566 |
return(0); /* outside view */ |
| 567 |
if (mov | orb) { /* moving relative to geometry */ |
| 568 |
d = getdistance(dx, dy, odir);/*distance from front plane */ |
| 569 |
#ifdef DOBJ |
| 570 |
d1 = dobj_trace(NULL, v1, odir); /* check objects */ |
| 571 |
/* check holodeck */ |
| 572 |
if (d1 < d) |
| 573 |
d = d1; |
| 574 |
#endif |
| 575 |
if (d >= .99*FHUGE) |
| 576 |
d = 0.5*(dev_zmax+dev_zmin); /* just guess */ |
| 577 |
VSUM(wip, v1, odir, d); |
| 578 |
VSUB(odir, wip, odev.v.vp); |
| 579 |
#if 0 |
| 580 |
fprintf(stderr, "moveview: hit %s at (%f,%f,%f) (t=%f)\n", |
| 581 |
li < 0 ? "object" : "mesh", |
| 582 |
wip[0], wip[1], wip[2], |
| 583 |
(wip[0]-odev.v.vp[0])*odir[0] + |
| 584 |
(wip[1]-odev.v.vp[1])*odir[1] + |
| 585 |
(wip[2]-odev.v.vp[2])*odir[2]); |
| 586 |
#endif |
| 587 |
} else /* panning with constant viewpoint */ |
| 588 |
VCOPY(nv.vdir, odir); |
| 589 |
if (orb && mov) { /* orbit left/right */ |
| 590 |
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov); |
| 591 |
VSUM(nv.vp, wip, odir, -1.); |
| 592 |
spinvector(nv.vdir, nv.vdir, nv.vup, d); |
| 593 |
} else if (orb) { /* orbit up/down */ |
| 594 |
fcross(v1, odir, nv.vup); |
| 595 |
if (normalize(v1) == 0.) |
| 596 |
return(0); |
| 597 |
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb); |
| 598 |
VSUM(nv.vp, wip, odir, -1.); |
| 599 |
spinvector(nv.vdir, nv.vdir, v1, d); |
| 600 |
} else if (mov) { /* move forward/backward */ |
| 601 |
d = MOVPCT/100. * mov; |
| 602 |
VSUM(nv.vp, nv.vp, odir, d); |
| 603 |
} |
| 604 |
if (!mov ^ !orb && headlocked) { /* restore head height */ |
| 605 |
VSUM(v1, odev.v.vp, nv.vp, -1.); |
| 606 |
d = DOT(v1, nv.vup); |
| 607 |
VSUM(nv.vp, nv.vp, odev.v.vup, d); |
| 608 |
} |
| 609 |
if (setview(&nv) != NULL) |
| 610 |
return(0); /* illegal view */ |
| 611 |
dev_view(&nv); |
| 612 |
inpresflags |= DFL(DC_SETVIEW); |
| 613 |
return(1); |
| 614 |
} |
| 615 |
|
| 616 |
|
| 617 |
static |
| 618 |
getframe(ebut) /* get focus frame */ |
| 619 |
XButtonPressedEvent *ebut; |
| 620 |
{ |
| 621 |
int startx = ebut->x, starty = ebut->y; |
| 622 |
int endx, endy; |
| 623 |
|
| 624 |
XMaskEvent(ourdisplay, ButtonReleaseMask, levptr(XEvent)); |
| 625 |
endx = levptr(XButtonReleasedEvent)->x; |
| 626 |
endy = levptr(XButtonReleasedEvent)->y; |
| 627 |
if (endx == startx | endy == starty) { |
| 628 |
XBell(ourdisplay, 0); |
| 629 |
return; |
| 630 |
} |
| 631 |
if (endx < startx) {register int c = endx; endx = startx; startx = c;} |
| 632 |
if (endy < starty) {register int c = endy; endy = starty; starty = c;} |
| 633 |
sprintf(odev_args, "%.3f %.3f %.3f %.3f", |
| 634 |
(startx+.5)/odev.hres, 1.-(endy+.5)/odev.vres, |
| 635 |
(endx+.5)/odev.hres, 1.-(starty+.5)/odev.vres); |
| 636 |
inpresflags |= DFL(DC_FOCUS); |
| 637 |
} |
| 638 |
|
| 639 |
|
| 640 |
static |
| 641 |
getmove(ebut) /* get view change */ |
| 642 |
XButtonPressedEvent *ebut; |
| 643 |
{ |
| 644 |
int movdir = MOVDIR(ebut->button); |
| 645 |
int movorb = MOVORB(ebut->state); |
| 646 |
int qlevel = MAXQUALITY-1; |
| 647 |
time_t lasttime, thistime; |
| 648 |
int nframes; |
| 649 |
Window rootw, childw; |
| 650 |
int rootx, rooty, wx, wy; |
| 651 |
unsigned int statemask; |
| 652 |
|
| 653 |
XNoOp(ourdisplay); /* makes sure we're not idle */ |
| 654 |
|
| 655 |
nframes = 0; |
| 656 |
while (!XCheckMaskEvent(ourdisplay, |
| 657 |
ButtonReleaseMask, levptr(XEvent))) { |
| 658 |
/* get cursor position */ |
| 659 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
| 660 |
&rootx, &rooty, &wx, &wy, &statemask)) |
| 661 |
break; /* on another screen */ |
| 662 |
|
| 663 |
draw_grids(0); /* clear old grid lines */ |
| 664 |
#ifdef STEREO |
| 665 |
pushright(); draw_grids(0); popright(); |
| 666 |
#endif |
| 667 |
/* compute view motion */ |
| 668 |
if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) { |
| 669 |
sleep(1); |
| 670 |
lasttime++; |
| 671 |
continue; /* cursor in bad place */ |
| 672 |
} |
| 673 |
draw_grids(1); /* redraw grid */ |
| 674 |
#ifdef STEREO |
| 675 |
pushright(); |
| 676 |
draw_grids(1); |
| 677 |
smUpdate(&vwright, qlevel); |
| 678 |
#ifdef DOBJ |
| 679 |
dobj_render(); |
| 680 |
#endif |
| 681 |
popright(); |
| 682 |
#endif |
| 683 |
/* redraw mesh */ |
| 684 |
smUpdate(&odev.v, qlevel); |
| 685 |
#ifdef DOBJ |
| 686 |
dobj_render(); /* redraw object */ |
| 687 |
#endif |
| 688 |
glFlush(); |
| 689 |
/* figure out good quality level */ |
| 690 |
if (!nframes++) { /* ignore first frame */ |
| 691 |
lasttime = time(0); |
| 692 |
continue; |
| 693 |
} |
| 694 |
thistime = time(0); |
| 695 |
if (thistime - lasttime >= 6 || |
| 696 |
nframes > (int)(3*3*TARGETFPS)) { |
| 697 |
qlevel = thistime<=lasttime ? 3*MAXQUALITY : |
| 698 |
(int)((double)nframes/(thistime-lasttime) |
| 699 |
/ TARGETFPS * qlevel + 0.5); |
| 700 |
nframes = 0; |
| 701 |
if (qlevel >= MAXQUALITY) { |
| 702 |
if (qlevel >= 3*MAXQUALITY) { /* brakes!! */ |
| 703 |
sleep(1); |
| 704 |
lasttime++; |
| 705 |
} |
| 706 |
qlevel = MAXQUALITY-1; |
| 707 |
} else if (qlevel < 1) |
| 708 |
qlevel = 1; |
| 709 |
} |
| 710 |
} |
| 711 |
if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */ |
| 712 |
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
| 713 |
wx = levptr(XButtonReleasedEvent)->x; |
| 714 |
wy = levptr(XButtonReleasedEvent)->y; |
| 715 |
moveview(wx, odev.vres-1-wy, movdir, movorb); |
| 716 |
} |
| 717 |
} |
| 718 |
|
| 719 |
|
| 720 |
static |
| 721 |
setglpersp(vp) /* set perspective view in GL */ |
| 722 |
register VIEW *vp; |
| 723 |
{ |
| 724 |
double d, xmin, xmax, ymin, ymax; |
| 725 |
|
| 726 |
if (mindpth >= maxdpth) { |
| 727 |
dev_zmin = 1.; |
| 728 |
dev_zmax = 100.; |
| 729 |
} else { |
| 730 |
dev_zmin = 0.1*mindpth; |
| 731 |
dev_zmax = 5.0*maxdpth; |
| 732 |
} |
| 733 |
if (odev.v.vfore > FTINY) |
| 734 |
dev_zmin = odev.v.vfore; |
| 735 |
if (odev.v.vaft > FTINY) |
| 736 |
dev_zmax = odev.v.vaft; |
| 737 |
if (dev_zmin*500. < dev_zmax) |
| 738 |
dev_zmax = dev_zmin*500.; |
| 739 |
xmax = dev_zmin * tan(PI/180./2. * odev.v.horiz); |
| 740 |
xmin = -xmax; |
| 741 |
d = odev.v.hoff * (xmax - xmin); |
| 742 |
xmin += d; xmax += d; |
| 743 |
ymax = dev_zmin * tan(PI/180./2. * odev.v.vert); |
| 744 |
ymin = -ymax; |
| 745 |
d = odev.v.voff * (ymax - ymin); |
| 746 |
ymin += d; ymax += d; |
| 747 |
/* set view matrix */ |
| 748 |
glMatrixMode(GL_PROJECTION); |
| 749 |
glLoadIdentity(); |
| 750 |
glFrustum(xmin, xmax, ymin, ymax, dev_zmin, dev_zmax); |
| 751 |
gluLookAt(odev.v.vp[0], odev.v.vp[1], odev.v.vp[2], |
| 752 |
odev.v.vp[0] + odev.v.vdir[0], |
| 753 |
odev.v.vp[1] + odev.v.vdir[1], |
| 754 |
odev.v.vp[2] + odev.v.vdir[2], |
| 755 |
odev.v.vup[0], odev.v.vup[1], odev.v.vup[2]); |
| 756 |
checkglerr("setting perspective view"); |
| 757 |
} |
| 758 |
|
| 759 |
|
| 760 |
static |
| 761 |
wipeclean(tmflag) /* prepare for redraw */ |
| 762 |
int tmflag; |
| 763 |
{ |
| 764 |
/* clear depth buffer */ |
| 765 |
#ifdef STEREO |
| 766 |
setstereobuf(STEREO_BUFFER_RIGHT); |
| 767 |
glClear(GL_DEPTH_BUFFER_BIT); |
| 768 |
setstereobuf(STEREO_BUFFER_LEFT); |
| 769 |
#endif |
| 770 |
glClear(GL_DEPTH_BUFFER_BIT); |
| 771 |
smClean(tmflag); /* reset drawing routines */ |
| 772 |
setglpersp(&odev.v); /* reset view & clipping planes */ |
| 773 |
} |
| 774 |
|
| 775 |
|
| 776 |
static |
| 777 |
getkey(ekey) /* get input key */ |
| 778 |
register XKeyPressedEvent *ekey; |
| 779 |
{ |
| 780 |
Window rootw, childw; |
| 781 |
int rootx, rooty, wx, wy; |
| 782 |
unsigned int statemask; |
| 783 |
int n; |
| 784 |
char buf[8]; |
| 785 |
|
| 786 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
| 787 |
if (n != 1) |
| 788 |
return; |
| 789 |
switch (buf[0]) { |
| 790 |
case 'h': /* turn on height motion lock */ |
| 791 |
headlocked = 1; |
| 792 |
return; |
| 793 |
case 'H': /* turn off height motion lock */ |
| 794 |
headlocked = 0; |
| 795 |
return; |
| 796 |
case 'l': /* retrieve last view */ |
| 797 |
inpresflags |= DFL(DC_LASTVIEW); |
| 798 |
return; |
| 799 |
case 'p': /* pause computation */ |
| 800 |
inpresflags |= DFL(DC_PAUSE); |
| 801 |
return; |
| 802 |
case 'v': /* spit out view */ |
| 803 |
inpresflags |= DFL(DC_GETVIEW); |
| 804 |
return; |
| 805 |
case 'f': /* frame view position */ |
| 806 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
| 807 |
&rootx, &rooty, &wx, &wy, &statemask)) |
| 808 |
return; /* on another screen */ |
| 809 |
sprintf(odev_args, "%.4f %.4f", (wx+.5)/odev.hres, |
| 810 |
1.-(wy+.5)/odev.vres); |
| 811 |
inpresflags |= DFL(DC_FOCUS); |
| 812 |
return; |
| 813 |
case 'F': /* unfocus */ |
| 814 |
odev_args[0] = '\0'; |
| 815 |
inpresflags |= DFL(DC_FOCUS); |
| 816 |
return; |
| 817 |
case '\n': |
| 818 |
case '\r': /* resume computation */ |
| 819 |
inpresflags |= DFL(DC_RESUME); |
| 820 |
return; |
| 821 |
case CTRL('R'): /* redraw screen */ |
| 822 |
wipeclean(1); |
| 823 |
return; |
| 824 |
case CTRL('L'): /* refresh from server */ |
| 825 |
if (inpresflags & DFL(DC_REDRAW)) |
| 826 |
return; |
| 827 |
setglpersp(&odev.v); /* reset clipping planes */ |
| 828 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| 829 |
glDisable(GL_DEPTH_TEST); /* so grids will clear */ |
| 830 |
draw_grids(1); |
| 831 |
#ifdef STEREO |
| 832 |
pushright(); |
| 833 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| 834 |
draw_grids(1); |
| 835 |
popright(); |
| 836 |
#endif |
| 837 |
glEnable(GL_DEPTH_TEST); |
| 838 |
glFlush(); |
| 839 |
smInit(rsL.max_samp); /* get rid of old values */ |
| 840 |
inpresflags |= DFL(DC_REDRAW); /* resend values from server */ |
| 841 |
rayqleft = 0; /* hold off update */ |
| 842 |
return; |
| 843 |
case 'K': /* kill rtrace process(es) */ |
| 844 |
inpresflags |= DFL(DC_KILL); |
| 845 |
break; |
| 846 |
case 'R': /* restart rtrace */ |
| 847 |
inpresflags |= DFL(DC_RESTART); |
| 848 |
break; |
| 849 |
case 'C': /* clobber holodeck */ |
| 850 |
inpresflags |= DFL(DC_CLOBBER); |
| 851 |
break; |
| 852 |
case 'q': /* quit the program */ |
| 853 |
inpresflags |= DFL(DC_QUIT); |
| 854 |
return; |
| 855 |
default: |
| 856 |
XBell(ourdisplay, 0); |
| 857 |
return; |
| 858 |
} |
| 859 |
} |
| 860 |
|
| 861 |
|
| 862 |
static |
| 863 |
fixwindow(eexp) /* repair damage to window */ |
| 864 |
register XExposeEvent *eexp; |
| 865 |
{ |
| 866 |
if (odev.hres == 0 | odev.vres == 0) { /* first exposure */ |
| 867 |
resizewindow((XConfigureEvent *)eexp); |
| 868 |
return; |
| 869 |
} |
| 870 |
if (eexp->count) /* wait for final exposure */ |
| 871 |
return; |
| 872 |
wipeclean(0); /* clear depth */ |
| 873 |
} |
| 874 |
|
| 875 |
|
| 876 |
static |
| 877 |
resizewindow(ersz) /* resize window */ |
| 878 |
register XConfigureEvent *ersz; |
| 879 |
{ |
| 880 |
glViewport(0, 0, ersz->width, ersz->height); |
| 881 |
|
| 882 |
if (ersz->width == odev.hres && ersz->height == odev.vres) |
| 883 |
return; |
| 884 |
|
| 885 |
odev.hres = ersz->width; |
| 886 |
odev.vres = ersz->height; |
| 887 |
|
| 888 |
odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres); |
| 889 |
odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres); |
| 890 |
|
| 891 |
inpresflags |= DFL(DC_SETVIEW); |
| 892 |
} |
