1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rhd_ogl.c,v 3.21 2003/05/19 16:32:18 greg Exp $"; |
3 |
#endif |
4 |
/* |
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* OpenGL driver for holodeck display. |
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* Based on GLX driver using T-mesh. |
7 |
* |
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* Define symbol STEREO for stereo viewing. |
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* Define symbol DOBJ for display object viewing. |
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*/ |
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|
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#ifdef NOSTEREO |
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#ifdef STEREO |
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#undef STEREO |
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#else |
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#undef NOSTEREO |
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#endif |
18 |
#endif |
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|
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#include "standard.h" |
21 |
|
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#include <GL/glx.h> |
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#include <GL/glu.h> |
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#ifdef STEREO |
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#include <X11/extensions/SGIStereo.h> |
26 |
#endif |
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#include <time.h> |
28 |
|
29 |
#include "rhd_odraw.h" |
30 |
#ifdef DOBJ |
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#include "rhdobj.h" |
32 |
#endif |
33 |
|
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#include "x11icon.h" |
35 |
|
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#ifndef RAYQLEN |
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#define RAYQLEN 0 /* max. rays to queue before flush */ |
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#endif |
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#ifndef MINWIDTH |
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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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#endif |
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#ifndef VIEWDIST |
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#define VIEWDIST 356 /* assumed viewing distance (mm) */ |
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#endif |
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#ifndef BORWIDTH |
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#define BORWIDTH 5 /* border width */ |
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#endif |
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|
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#ifndef FEQ |
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#define FEQ(a,b) ((a)-(b) <= FTINY && (a)-(b) >= -FTINY) |
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#endif |
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|
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#define VWHEADLOCK 01 /* head position is locked flag */ |
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#define VWPERSP 02 /* perspective view is set */ |
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#define VWORTHO 04 /* orthographic view is set */ |
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#define VWCHANGE 010 /* view has changed */ |
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#define VWSTEADY 020 /* view is now steady */ |
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#define VWMAPPED 040 /* window is mapped */ |
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|
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#define GAMMA 1.4 /* default gamma correction */ |
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|
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#define FRAMESTATE(s) (((s)&(ShiftMask|ControlMask))==(ShiftMask|ControlMask)) |
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|
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#define MOVPCT 7 /* percent distance to move /frame */ |
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#define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1) |
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#define MOVDEG (-5) /* degrees to orbit CW/down /frame */ |
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#define MOVORB(s) ((s)&ShiftMask ? 1 : (s)&ControlMask ? -1 : 0) |
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|
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#define setstereobuf(bid) (glXWaitGL(), \ |
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XSGISetStereoBuffer(ourdisplay, gwind, bid), \ |
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glXWaitX()) |
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|
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#define ourscreen DefaultScreen(ourdisplay) |
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#define ourroot RootWindow(ourdisplay,ourscreen) |
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#define ourmask (StructureNotifyMask|ExposureMask|KeyPressMask|\ |
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ButtonPressMask|ButtonReleaseMask) |
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|
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#define levptr(etype) ((etype *)¤tevent) |
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|
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struct driver odev; /* global device driver structure */ |
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|
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char odev_args[64]; /* command arguments */ |
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|
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static GLfloat *depthbuffer = NULL; /* depth buffer */ |
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|
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#ifdef STEREO |
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static VIEW vwright; /* right eye view */ |
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static GLfloat *depthright = NULL; /* right depth buffer */ |
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#endif |
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|
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static int rayqleft = 0; /* rays left to queue before flush */ |
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|
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static XEvent currentevent; /* current event */ |
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|
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static unsigned long ourblack=0, ourwhite=~0; |
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|
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static Display *ourdisplay = NULL; /* our display */ |
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static XVisualInfo *ourvinf; /* our visual information */ |
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static Window gwind = 0; /* our graphics window */ |
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static GLXContext gctx; /* our GLX context */ |
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|
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static double pwidth, pheight; /* pixel dimensions (mm) */ |
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|
105 |
static double dev_zmin, dev_zmax; /* fore and aft clipping plane dist. */ |
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static double dev_zrat; /* (1. - dev_zmin/dev_zmax) */ |
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|
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#define setzrat() (dev_zrat = 1. - dev_zmin/dev_zmax) |
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#define mapdepth(d) ((d)>0.9995 ? FHUGE : dev_zmin/(1.-(d)*dev_zrat)) |
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|
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static int inpresflags; /* input result flags */ |
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|
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static int viewflags; /* what's happening with view */ |
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|
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static int resizewindow(), getevent(), getkey(), moveview(), wipeclean(), |
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xferdepth(), freedepth(), setglortho(), |
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setglpersp(), getframe(), getmove(), fixwindow(), mytmflags(); |
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|
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static double getdistance(); |
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|
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#ifdef STEREO |
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static int pushright(), popright(); |
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#endif |
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|
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extern int gmPortals; /* GL portal list id */ |
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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_DOUBLEBUFFER, |
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GLX_RED_SIZE,8, GLX_GREEN_SIZE,8, |
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GLX_BLUE_SIZE,8, GLX_DEPTH_SIZE,15, None}; |
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static int atlOK[] = {GLX_RGBA, GLX_DOUBLEBUFFER, |
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GLX_RED_SIZE,4, GLX_GREEN_SIZE,4, |
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GLX_BLUE_SIZE,4, 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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CHECK(ourdisplay==NULL, USER, |
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"cannot open X-windows; DISPLAY variable set?"); |
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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; |
160 |
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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ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlOK); |
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CHECK(ourvinf==NULL, 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 */ |
194 |
ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot, |
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ourvinf->visual, AllocNone); |
196 |
gwind = XCreateWindow(ourdisplay, ourroot, 0, 0, |
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DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH, |
198 |
#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, |
204 |
CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &ourwinattr); |
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CHECK(gwind==0, SYSTEM, "cannot create window"); |
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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); |
212 |
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 |
224 |
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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glClearColor(0, 0, 0, 0); |
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glFrontFace(GL_CCW); |
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glDisable(GL_CULL_FACE); |
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glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE); |
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
234 |
glPixelStorei(GL_PACK_ALIGNMENT, 1); |
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
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/* figure out sensible view */ |
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pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) / |
238 |
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.; |
243 |
setstereobuf(STEREO_BUFFER_LEFT); |
244 |
#endif |
245 |
checkglerr("setting rendering parameters"); |
246 |
odev.v = stdview; |
247 |
odev.v.type = VT_PER; |
248 |
viewflags = VWSTEADY; /* view starts static */ |
249 |
/* map the window */ |
250 |
XMapWindow(ourdisplay, gwind); |
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dev_input(); /* sets size and view angles */ |
252 |
if (!odInit(DisplayWidth(ourdisplay,ourscreen) * |
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DisplayHeight(ourdisplay,ourscreen) / 3)) |
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error(SYSTEM, "insufficient memory for value storage"); |
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odev.name = id; |
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odev.firstuse = 1; /* can't recycle samples */ |
257 |
odev.ifd = ConnectionNumber(ourdisplay); |
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} |
259 |
|
260 |
|
261 |
dev_close() /* close our display and free resources */ |
262 |
{ |
263 |
#ifdef DOBJ |
264 |
dobj_cleanup(); |
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#endif |
266 |
freedepth(); |
267 |
gmEndGeom(); |
268 |
gmEndPortal(); |
269 |
odDone(); |
270 |
glXMakeCurrent(ourdisplay, None, NULL); |
271 |
glXDestroyContext(ourdisplay, gctx); |
272 |
XDestroyWindow(ourdisplay, gwind); |
273 |
gwind = 0; |
274 |
XCloseDisplay(ourdisplay); |
275 |
ourdisplay = NULL; |
276 |
tmDone(NULL); |
277 |
odev.v.type = 0; |
278 |
odev.hres = odev.vres = 0; |
279 |
odev.ifd = -1; |
280 |
} |
281 |
|
282 |
|
283 |
dev_clear() /* clear our representation */ |
284 |
{ |
285 |
viewflags |= VWCHANGE; /* pretend our view has changed */ |
286 |
wipeclean(); /* clean off display and samples */ |
287 |
dev_flush(); /* redraw geometry & get depth */ |
288 |
rayqleft = 0; /* hold off update */ |
289 |
} |
290 |
|
291 |
|
292 |
int |
293 |
dev_view(nv) /* assign new driver view */ |
294 |
register VIEW *nv; |
295 |
{ |
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double d; |
297 |
|
298 |
if (nv->type != VT_PER || /* check view legality */ |
299 |
nv->horiz > 160. || nv->vert > 160.) { |
300 |
error(COMMAND, "illegal view type/angle"); |
301 |
nv->type = odev.v.type; |
302 |
nv->horiz = odev.v.horiz; |
303 |
nv->vert = odev.v.vert; |
304 |
return(0); |
305 |
} |
306 |
if (nv != &odev.v) { |
307 |
/* resize window? */ |
308 |
if (!FEQ(nv->horiz,odev.v.horiz) || |
309 |
!FEQ(nv->vert,odev.v.vert)) { |
310 |
int dw = DisplayWidth(ourdisplay,ourscreen); |
311 |
int dh = DisplayHeight(ourdisplay,ourscreen); |
312 |
|
313 |
dw -= 25; /* for window frame */ |
314 |
dh -= 50; |
315 |
#ifdef STEREO |
316 |
dh /= 2; |
317 |
#endif |
318 |
odev.hres = 2.*VIEWDIST/pwidth * |
319 |
tan(PI/180./2.*nv->horiz); |
320 |
odev.vres = 2.*VIEWDIST/pheight * |
321 |
tan(PI/180./2.*nv->vert); |
322 |
if (odev.hres > dw) { |
323 |
odev.vres = dw * odev.vres / odev.hres; |
324 |
odev.hres = dw; |
325 |
} |
326 |
if (odev.vres > dh) { |
327 |
odev.hres = dh * odev.hres / odev.vres; |
328 |
odev.vres = dh; |
329 |
} |
330 |
XResizeWindow(ourdisplay, gwind, odev.hres, odev.vres); |
331 |
dev_input(); /* get resize event */ |
332 |
} |
333 |
odev.v = *nv; /* setview() already called */ |
334 |
viewflags |= VWCHANGE; |
335 |
} |
336 |
#ifdef STEREO |
337 |
vwright = *nv; |
338 |
d = eyesepdist / sqrt(nv->hn2); |
339 |
VSUM(vwright.vp, nv->vp, nv->hvec, d); |
340 |
/* setview(&vwright); -- Unnecessary */ |
341 |
#endif |
342 |
wipeclean(); |
343 |
return(1); |
344 |
} |
345 |
|
346 |
|
347 |
dev_section(gfn, pfn) /* add octree for geometry rendering */ |
348 |
char *gfn, *pfn; |
349 |
{ |
350 |
char *cp; |
351 |
|
352 |
if (gfn == NULL) { |
353 |
gmEndGeom(); |
354 |
gmEndPortal(); |
355 |
wipeclean(); /* new geometry, so redraw it */ |
356 |
return; |
357 |
} |
358 |
if (access(gfn, R_OK) == 0) |
359 |
gmNewGeom(gfn); |
360 |
#ifdef DEBUG |
361 |
else { |
362 |
sprintf(errmsg, "cannot load octree \"%s\"", gfn); |
363 |
error(WARNING, errmsg); |
364 |
} |
365 |
#endif |
366 |
if (pfn != NULL) |
367 |
gmNewPortal(pfn); |
368 |
} |
369 |
|
370 |
|
371 |
dev_auxcom(cmd, args) /* process an auxiliary command */ |
372 |
char *cmd, *args; |
373 |
{ |
374 |
#ifdef DOBJ |
375 |
int vischange; |
376 |
|
377 |
if ((vischange = dobj_command(cmd, args)) >= 0) { |
378 |
if (vischange) { |
379 |
imm_mode = beam_sync(1) > 0; |
380 |
dev_clear(); |
381 |
} |
382 |
return; |
383 |
} |
384 |
#endif |
385 |
sprintf(errmsg, "%s: unknown command", cmd); |
386 |
error(COMMAND, errmsg); |
387 |
} |
388 |
|
389 |
|
390 |
VIEW * |
391 |
dev_auxview(n, hvres) /* return nth auxiliary view */ |
392 |
int n; |
393 |
int hvres[2]; |
394 |
{ |
395 |
hvres[0] = odev.hres; hvres[1] = odev.vres; |
396 |
if (n == 0) |
397 |
return(&odev.v); |
398 |
#ifdef STEREO |
399 |
if (n == 1) |
400 |
return(&vwright); |
401 |
#endif |
402 |
return(NULL); |
403 |
} |
404 |
|
405 |
|
406 |
int |
407 |
dev_input() /* get X11 input */ |
408 |
{ |
409 |
inpresflags = 0; |
410 |
|
411 |
do |
412 |
getevent(); |
413 |
|
414 |
while (XPending(ourdisplay) > 0); |
415 |
|
416 |
odev.inpready = 0; |
417 |
|
418 |
return(inpresflags); |
419 |
} |
420 |
|
421 |
|
422 |
dev_value(c, d, p) /* add a pixel value to our texture */ |
423 |
COLR c; |
424 |
FVECT d, p; |
425 |
{ |
426 |
#ifdef DOBJ |
427 |
if (dobj_lightsamp != NULL) { /* in light source sampling */ |
428 |
(*dobj_lightsamp)(c, d, p); |
429 |
return; |
430 |
} |
431 |
#endif |
432 |
odSample(c, d, p); /* add to display representation */ |
433 |
if (!--rayqleft) |
434 |
dev_flush(); /* flush output */ |
435 |
} |
436 |
|
437 |
|
438 |
int |
439 |
dev_flush() /* flush output as appropriate */ |
440 |
{ |
441 |
int ndrawn; |
442 |
|
443 |
if ((viewflags&(VWMAPPED|VWPERSP)) == (VWMAPPED|VWPERSP)) { |
444 |
#ifdef STEREO |
445 |
pushright(); /* draw right eye */ |
446 |
ndrawn = gmDrawGeom(); |
447 |
#ifdef DOBJ |
448 |
ndrawn += dobj_render(); |
449 |
#endif |
450 |
checkglerr("rendering right eye"); |
451 |
popright(); /* draw left eye */ |
452 |
#endif |
453 |
ndrawn = gmDrawGeom(); |
454 |
#ifdef DOBJ |
455 |
ndrawn += dobj_render(); |
456 |
#endif |
457 |
glXSwapBuffers(ourdisplay, gwind); |
458 |
checkglerr("rendering base view"); |
459 |
} |
460 |
if ((viewflags&(VWMAPPED|VWSTEADY|VWPERSP|VWORTHO)) == |
461 |
(VWMAPPED|VWSTEADY|VWPERSP)) { |
462 |
/* first time after steady */ |
463 |
if (ndrawn) |
464 |
xferdepth(); /* transfer and clear depth */ |
465 |
setglortho(); /* set orthographic view */ |
466 |
|
467 |
} |
468 |
if ((viewflags&(VWMAPPED|VWSTEADY|VWPERSP|VWORTHO)) == |
469 |
(VWMAPPED|VWSTEADY|VWORTHO)) { |
470 |
/* else update cones */ |
471 |
#ifdef STEREO |
472 |
pushright(); |
473 |
odUpdate(1); /* draw right eye */ |
474 |
popright(); |
475 |
#endif |
476 |
odUpdate(0); /* draw left eye */ |
477 |
glFlush(); /* flush OpenGL */ |
478 |
} |
479 |
rayqleft = RAYQLEN; |
480 |
/* flush X11 and return # pending */ |
481 |
return(odev.inpready = XPending(ourdisplay)); |
482 |
} |
483 |
|
484 |
|
485 |
checkglerr(where) /* check for GL or GLU error */ |
486 |
char *where; |
487 |
{ |
488 |
register GLenum errcode; |
489 |
|
490 |
while ((errcode = glGetError()) != GL_NO_ERROR) { |
491 |
sprintf(errmsg, "OpenGL error %s: %s", |
492 |
where, gluErrorString(errcode)); |
493 |
error(WARNING, errmsg); |
494 |
} |
495 |
} |
496 |
|
497 |
|
498 |
static |
499 |
xferdepth() /* load and clear depth buffer */ |
500 |
{ |
501 |
register GLfloat *dbp; |
502 |
register GLubyte *pbuf; |
503 |
|
504 |
if (depthbuffer == NULL) { /* allocate private depth buffer */ |
505 |
#ifdef STEREO |
506 |
depthright = (GLfloat *)malloc( |
507 |
odev.hres*odev.vres*sizeof(GLfloat)); |
508 |
#endif |
509 |
depthbuffer = (GLfloat *)malloc( |
510 |
odev.hres*odev.vres*sizeof(GLfloat)); |
511 |
CHECK(depthbuffer==NULL, SYSTEM, "out of memory in xferdepth"); |
512 |
} |
513 |
/* allocate alpha buffer for portals */ |
514 |
if (gmPortals) |
515 |
pbuf = (GLubyte *)malloc(odev.hres*odev.vres*sizeof(GLubyte)); |
516 |
else |
517 |
pbuf = NULL; |
518 |
#ifdef STEREO |
519 |
pushright(); |
520 |
glReadPixels(0, 0, odev.hres, odev.vres, |
521 |
GL_DEPTH_COMPONENT, GL_FLOAT, depthright); |
522 |
if (pbuf != NULL) { |
523 |
glClear(GL_COLOR_BUFFER_BIT); |
524 |
gmDrawPortals(0xff, -1, -1, -1); |
525 |
glReadPixels(0, 0, odev.hres, odev.vres, |
526 |
GL_RED, GL_UNSIGNED_BYTE, pbuf); |
527 |
} |
528 |
for (dbp = depthright + odev.hres*odev.vres; dbp-- > depthright; ) |
529 |
if (pbuf != NULL && pbuf[dbp-depthright]&0x40) |
530 |
*dbp = FHUGE; |
531 |
else |
532 |
*dbp = mapdepth(*dbp); |
533 |
glClear(GL_DEPTH_BUFFER_BIT); |
534 |
odDepthMap(1, depthright); |
535 |
popright(); |
536 |
#endif |
537 |
/* read back depth buffer */ |
538 |
glReadPixels(0, 0, odev.hres, odev.vres, |
539 |
GL_DEPTH_COMPONENT, GL_FLOAT, depthbuffer); |
540 |
if (pbuf != NULL) { |
541 |
glClear(GL_COLOR_BUFFER_BIT); /* find portals */ |
542 |
gmDrawPortals(0xff, -1, -1, -1); |
543 |
glReadPixels(0, 0, odev.hres, odev.vres, |
544 |
GL_RED, GL_UNSIGNED_BYTE, pbuf); |
545 |
#ifdef DEBUG |
546 |
glXSwapBuffers(ourdisplay, gwind); |
547 |
#endif |
548 |
} |
549 |
for (dbp = depthbuffer + odev.hres*odev.vres; dbp-- > depthbuffer; ) |
550 |
if (pbuf != NULL && pbuf[dbp-depthbuffer]&0x40) |
551 |
*dbp = FHUGE; |
552 |
else |
553 |
*dbp = mapdepth(*dbp); |
554 |
glClear(GL_DEPTH_BUFFER_BIT); /* clear system depth buffer */ |
555 |
odDepthMap(0, depthbuffer); /* transfer depth data */ |
556 |
if (pbuf != NULL) |
557 |
free((void *)pbuf); /* free our portal buffer */ |
558 |
} |
559 |
|
560 |
|
561 |
static |
562 |
freedepth() /* free recorded depth buffer */ |
563 |
{ |
564 |
if (depthbuffer == NULL) |
565 |
return; |
566 |
#ifdef STEREO |
567 |
odDepthMap(1, NULL); |
568 |
free((void *)depthright); |
569 |
depthright = NULL; |
570 |
#endif |
571 |
odDepthMap(0, NULL); |
572 |
free((void *)depthbuffer); |
573 |
depthbuffer = NULL; |
574 |
} |
575 |
|
576 |
|
577 |
static double |
578 |
getdistance(dx, dy, direc) /* distance from fore plane along view ray */ |
579 |
int dx, dy; |
580 |
FVECT direc; |
581 |
{ |
582 |
GLfloat gldepth; |
583 |
double dist; |
584 |
|
585 |
if (dx<0 | dx>=odev.hres | dy<0 | dy>=odev.vres) |
586 |
return(FHUGE); |
587 |
if (depthbuffer != NULL) |
588 |
dist = depthbuffer[dy*odev.hres + dx]; |
589 |
else { |
590 |
glReadPixels(dx,dy, 1,1, GL_DEPTH_COMPONENT, |
591 |
GL_FLOAT, &gldepth); |
592 |
dist = mapdepth(gldepth); |
593 |
} |
594 |
if (dist >= .99*FHUGE) |
595 |
return(FHUGE); |
596 |
return((dist-odev.v.vfore)/DOT(direc,odev.v.vdir)); |
597 |
} |
598 |
|
599 |
|
600 |
#ifdef STEREO |
601 |
static |
602 |
pushright() /* push on right view & buffer */ |
603 |
{ |
604 |
double d; |
605 |
|
606 |
setstereobuf(STEREO_BUFFER_RIGHT); |
607 |
if (viewflags & VWPERSP) { |
608 |
glMatrixMode(GL_MODELVIEW); |
609 |
glPushMatrix(); |
610 |
d = -eyesepdist / sqrt(odev.v.hn2); |
611 |
glTranslated(d*odev.v.hvec[0], d*odev.v.hvec[1], |
612 |
d*odev.v.hvec[2]); |
613 |
checkglerr("setting right view"); |
614 |
} |
615 |
} |
616 |
|
617 |
|
618 |
static |
619 |
popright() /* pop off right view & buffer */ |
620 |
{ |
621 |
if (viewflags & VWPERSP) { |
622 |
glMatrixMode(GL_MODELVIEW); |
623 |
glPopMatrix(); |
624 |
} |
625 |
setstereobuf(STEREO_BUFFER_LEFT); |
626 |
} |
627 |
#endif |
628 |
|
629 |
|
630 |
static int |
631 |
mytmflags() /* figure out tone mapping flags */ |
632 |
{ |
633 |
extern char *progname; |
634 |
register char *cp, *tail; |
635 |
/* find basic name */ |
636 |
for (cp = tail = progname; *cp; cp++) |
637 |
if (*cp == '/') |
638 |
tail = cp+1; |
639 |
for (cp = tail; *cp && *cp != '.'; cp++) |
640 |
; |
641 |
#ifdef DEBUG |
642 |
if (cp > tail && cp[-1] == 'h') |
643 |
return(TM_F_HUMAN); |
644 |
else |
645 |
return(TM_F_CAMERA); |
646 |
#else |
647 |
if (cp > tail && cp[-1] == 'h') |
648 |
return(TM_F_HUMAN|TM_F_NOSTDERR); |
649 |
else |
650 |
return(TM_F_CAMERA|TM_F_NOSTDERR); |
651 |
#endif |
652 |
} |
653 |
|
654 |
|
655 |
static |
656 |
getevent() /* get next event */ |
657 |
{ |
658 |
XNextEvent(ourdisplay, levptr(XEvent)); |
659 |
switch (levptr(XEvent)->type) { |
660 |
case ConfigureNotify: |
661 |
resizewindow(levptr(XConfigureEvent)); |
662 |
break; |
663 |
case UnmapNotify: |
664 |
viewflags &= ~VWMAPPED; |
665 |
break; |
666 |
case MapNotify: |
667 |
odRemap(0); |
668 |
viewflags |= VWMAPPED; |
669 |
break; |
670 |
case Expose: |
671 |
fixwindow(levptr(XExposeEvent)); |
672 |
break; |
673 |
case KeyPress: |
674 |
getkey(levptr(XKeyPressedEvent)); |
675 |
break; |
676 |
case ButtonPress: |
677 |
if (FRAMESTATE(levptr(XButtonPressedEvent)->state)) |
678 |
getframe(levptr(XButtonPressedEvent)); |
679 |
else |
680 |
getmove(levptr(XButtonPressedEvent)); |
681 |
break; |
682 |
} |
683 |
} |
684 |
|
685 |
|
686 |
static |
687 |
draw3dline(wp) /* draw 3d line in world coordinates */ |
688 |
register FVECT wp[2]; |
689 |
{ |
690 |
glVertex3d(wp[0][0], wp[0][1], wp[0][2]); |
691 |
glVertex3d(wp[1][0], wp[1][1], wp[1][2]); |
692 |
} |
693 |
|
694 |
|
695 |
static |
696 |
draw_grids(fore) /* draw holodeck section grids */ |
697 |
int fore; |
698 |
{ |
699 |
glPushAttrib(GL_LIGHTING_BIT|GL_ENABLE_BIT); |
700 |
glDisable(GL_LIGHTING); |
701 |
if (fore) |
702 |
glColor3ub(4, 250, 250); |
703 |
else |
704 |
glColor3ub(0, 0, 0); |
705 |
glBegin(GL_LINES); /* draw each grid line */ |
706 |
gridlines(draw3dline); |
707 |
glEnd(); |
708 |
checkglerr("drawing grid lines"); |
709 |
glPopAttrib(); |
710 |
} |
711 |
|
712 |
|
713 |
static |
714 |
moveview(dx, dy, mov, orb) /* move our view */ |
715 |
int dx, dy, mov, orb; |
716 |
{ |
717 |
VIEW nv; |
718 |
FVECT odir, v1, wip; |
719 |
double d, d1; |
720 |
register int li; |
721 |
/* start with old view */ |
722 |
nv = odev.v; |
723 |
/* orient our motion */ |
724 |
if (viewray(v1, odir, &odev.v, |
725 |
(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY) |
726 |
return(0); /* outside view */ |
727 |
if (mov | orb) { /* moving relative to geometry */ |
728 |
d = getdistance(dx, dy, odir); /* distance from front plane */ |
729 |
#ifdef DOBJ |
730 |
d1 = dobj_trace(NULL, v1, odir); |
731 |
if (d1 < d) |
732 |
d = d1; |
733 |
#endif |
734 |
if (d >= .99*FHUGE) |
735 |
d = 0.5*(dev_zmax+dev_zmin); /* just guess */ |
736 |
VSUM(wip, v1, odir, d); |
737 |
VSUB(odir, wip, odev.v.vp); |
738 |
} else /* panning with constant viewpoint */ |
739 |
VCOPY(nv.vdir, odir); |
740 |
if (orb && mov) { /* orbit left/right */ |
741 |
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov); |
742 |
VSUM(nv.vp, wip, odir, -1.); |
743 |
spinvector(nv.vdir, nv.vdir, nv.vup, d); |
744 |
} else if (orb) { /* orbit up/down */ |
745 |
fcross(v1, odir, nv.vup); |
746 |
if (normalize(v1) == 0.) |
747 |
return(0); |
748 |
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb); |
749 |
VSUM(nv.vp, wip, odir, -1.); |
750 |
spinvector(nv.vdir, nv.vdir, v1, d); |
751 |
} else if (mov) { /* move forward/backward */ |
752 |
d = MOVPCT/100. * mov; |
753 |
VSUM(nv.vp, nv.vp, odir, d); |
754 |
} |
755 |
if (!mov ^ !orb && viewflags&VWHEADLOCK) { /* restore height */ |
756 |
VSUM(v1, odev.v.vp, nv.vp, -1.); |
757 |
d = DOT(v1, nv.vup); |
758 |
VSUM(nv.vp, nv.vp, odev.v.vup, d); |
759 |
} |
760 |
if (setview(&nv) != NULL) |
761 |
return(0); /* illegal view */ |
762 |
dev_view(&nv); |
763 |
inpresflags |= DFL(DC_SETVIEW); |
764 |
return(1); |
765 |
} |
766 |
|
767 |
|
768 |
static |
769 |
getframe(ebut) /* get focus frame */ |
770 |
XButtonPressedEvent *ebut; |
771 |
{ |
772 |
int startx = ebut->x, starty = ebut->y; |
773 |
int endx, endy; |
774 |
|
775 |
XMaskEvent(ourdisplay, ButtonReleaseMask, levptr(XEvent)); |
776 |
endx = levptr(XButtonReleasedEvent)->x; |
777 |
endy = levptr(XButtonReleasedEvent)->y; |
778 |
if (endx == startx | endy == starty) { |
779 |
XBell(ourdisplay, 0); |
780 |
return; |
781 |
} |
782 |
if (endx < startx) {register int c = endx; endx = startx; startx = c;} |
783 |
if (endy < starty) {register int c = endy; endy = starty; starty = c;} |
784 |
sprintf(odev_args, "%.3f %.3f %.3f %.3f", |
785 |
(startx+.5)/odev.hres, 1.-(endy+.5)/odev.vres, |
786 |
(endx+.5)/odev.hres, 1.-(starty+.5)/odev.vres); |
787 |
inpresflags |= DFL(DC_FOCUS); |
788 |
} |
789 |
|
790 |
|
791 |
static |
792 |
waitabit() /* pause a moment */ |
793 |
{ |
794 |
struct timespec ts; |
795 |
ts.tv_sec = 0; |
796 |
ts.tv_nsec = 50000000; |
797 |
nanosleep(&ts, NULL); |
798 |
} |
799 |
|
800 |
|
801 |
static |
802 |
getmove(ebut) /* get view change */ |
803 |
XButtonPressedEvent *ebut; |
804 |
{ |
805 |
int movdir = MOVDIR(ebut->button); |
806 |
int movorb = MOVORB(ebut->state); |
807 |
int ndrawn; |
808 |
Window rootw, childw; |
809 |
int rootx, rooty, wx, wy; |
810 |
unsigned int statemask; |
811 |
|
812 |
XNoOp(ourdisplay); /* makes sure we're not idle */ |
813 |
|
814 |
viewflags &= ~VWSTEADY; /* flag moving view */ |
815 |
setglpersp(); /* start us off in perspective */ |
816 |
while (!XCheckMaskEvent(ourdisplay, |
817 |
ButtonReleaseMask, levptr(XEvent))) { |
818 |
/* pause so as not to move too fast */ |
819 |
waitabit(); |
820 |
/* get cursor position */ |
821 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
822 |
&rootx, &rooty, &wx, &wy, &statemask)) |
823 |
break; /* on another screen */ |
824 |
/* compute view motion */ |
825 |
if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) { |
826 |
sleep(1); |
827 |
continue; /* cursor in bad place */ |
828 |
} |
829 |
draw_grids(1); /* redraw grid */ |
830 |
#ifdef STEREO |
831 |
pushright(); |
832 |
draw_grids(1); |
833 |
ndrawn = gmDrawGeom(); |
834 |
#ifdef DOBJ |
835 |
ndrawn += dobj_render(); |
836 |
#endif |
837 |
popright(); |
838 |
#endif |
839 |
/* redraw octrees */ |
840 |
ndrawn = gmDrawGeom(); |
841 |
#ifdef DOBJ |
842 |
ndrawn += dobj_render(); /* redraw objects */ |
843 |
#endif |
844 |
glXSwapBuffers(ourdisplay, gwind); |
845 |
if (!ndrawn) |
846 |
sleep(1); /* for reasonable interaction */ |
847 |
} |
848 |
if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */ |
849 |
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
850 |
wx = levptr(XButtonReleasedEvent)->x; |
851 |
wy = levptr(XButtonReleasedEvent)->y; |
852 |
moveview(wx, odev.vres-1-wy, movdir, movorb); |
853 |
} |
854 |
viewflags |= VWSTEADY; /* done goofing around */ |
855 |
} |
856 |
|
857 |
|
858 |
static |
859 |
setglpersp() /* set perspective view in GL */ |
860 |
{ |
861 |
double d, xmin, xmax, ymin, ymax; |
862 |
GLfloat vec[4]; |
863 |
double depthlim[2]; |
864 |
/* set depth limits */ |
865 |
gmDepthLimit(depthlim, odev.v.vp, odev.v.vdir); |
866 |
if (depthlim[0] >= depthlim[1]) { |
867 |
dev_zmin = 1.; |
868 |
dev_zmax = 100.; |
869 |
} else { |
870 |
dev_zmin = 0.5*depthlim[0]; |
871 |
dev_zmax = 1.25*depthlim[1]; |
872 |
if (dev_zmin > dev_zmax/5.) |
873 |
dev_zmin = dev_zmax/5.; |
874 |
} |
875 |
if (odev.v.vfore > FTINY) |
876 |
dev_zmin = odev.v.vfore; |
877 |
if (odev.v.vaft > FTINY) |
878 |
dev_zmax = odev.v.vaft; |
879 |
if (dev_zmin*500. < dev_zmax) |
880 |
dev_zmin = dev_zmax/500.; |
881 |
setzrat(); |
882 |
xmax = dev_zmin * tan(PI/180./2. * odev.v.horiz); |
883 |
xmin = -xmax; |
884 |
d = odev.v.hoff * (xmax - xmin); |
885 |
xmin += d; xmax += d; |
886 |
ymax = dev_zmin * tan(PI/180./2. * odev.v.vert); |
887 |
ymin = -ymax; |
888 |
d = odev.v.voff * (ymax - ymin); |
889 |
ymin += d; ymax += d; |
890 |
/* set view matrix */ |
891 |
glMatrixMode(GL_PROJECTION); |
892 |
glLoadIdentity(); |
893 |
glFrustum(xmin, xmax, ymin, ymax, dev_zmin, dev_zmax); |
894 |
gluLookAt(odev.v.vp[0], odev.v.vp[1], odev.v.vp[2], |
895 |
odev.v.vp[0] + odev.v.vdir[0], |
896 |
odev.v.vp[1] + odev.v.vdir[1], |
897 |
odev.v.vp[2] + odev.v.vdir[2], |
898 |
odev.v.vup[0], odev.v.vup[1], odev.v.vup[2]); |
899 |
checkglerr("setting perspective view"); |
900 |
vec[0] = vec[1] = vec[2] = 0.; vec[3] = 1.; |
901 |
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, vec); |
902 |
vec[0] = -odev.v.vdir[0]; |
903 |
vec[1] = -odev.v.vdir[1]; |
904 |
vec[2] = -odev.v.vdir[2]; |
905 |
vec[3] = 0.; |
906 |
glLightfv(GL_LIGHT0, GL_POSITION, vec); |
907 |
vec[0] = vec[1] = vec[2] = .7; vec[3] = 1.; |
908 |
glLightfv(GL_LIGHT0, GL_SPECULAR, vec); |
909 |
glLightfv(GL_LIGHT0, GL_DIFFUSE, vec); |
910 |
vec[0] = vec[1] = vec[2] = .3; vec[3] = 1.; |
911 |
glLightfv(GL_LIGHT0, GL_AMBIENT, vec); |
912 |
glEnable(GL_LIGHT0); |
913 |
glEnable(GL_LIGHTING); /* light our GL objects */ |
914 |
glShadeModel(GL_SMOOTH); |
915 |
viewflags &= ~VWORTHO; |
916 |
viewflags |= VWPERSP; |
917 |
} |
918 |
|
919 |
|
920 |
static |
921 |
setglortho() /* set up orthographic view for cone drawing */ |
922 |
{ |
923 |
glDrawBuffer(GL_FRONT); /* use single-buffer mode */ |
924 |
/* set view matrix */ |
925 |
glMatrixMode(GL_PROJECTION); |
926 |
glLoadIdentity(); |
927 |
glOrtho(0., (double)odev.hres, 0., (double)odev.vres, |
928 |
0.001*OMAXDEPTH, 1.001*(-OMAXDEPTH)); |
929 |
checkglerr("setting orthographic view"); |
930 |
glDisable(GL_LIGHTING); /* cones are constant color */ |
931 |
glShadeModel(GL_FLAT); |
932 |
viewflags &= ~VWPERSP; |
933 |
viewflags |= VWORTHO; |
934 |
} |
935 |
|
936 |
|
937 |
static |
938 |
wipeclean() /* prepare for redraw */ |
939 |
{ |
940 |
glDrawBuffer(GL_BACK); /* use double-buffer mode */ |
941 |
glReadBuffer(GL_BACK); |
942 |
/* clear buffers */ |
943 |
#ifdef STEREO |
944 |
setstereobuf(STEREO_BUFFER_RIGHT); |
945 |
glClear(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT); |
946 |
setstereobuf(STEREO_BUFFER_LEFT); |
947 |
#endif |
948 |
glClear(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT); |
949 |
freedepth(); |
950 |
if ((viewflags&(VWCHANGE|VWSTEADY)) == |
951 |
(VWCHANGE|VWSTEADY)) { /* clear samples if new */ |
952 |
odClean(); |
953 |
viewflags &= ~VWCHANGE; /* change noted */ |
954 |
} else if (viewflags & VWSTEADY) |
955 |
odRedrawAll(); |
956 |
setglpersp(); /* reset view & clipping planes */ |
957 |
} |
958 |
|
959 |
|
960 |
static |
961 |
getkey(ekey) /* get input key */ |
962 |
register XKeyPressedEvent *ekey; |
963 |
{ |
964 |
Window rootw, childw; |
965 |
int rootx, rooty, wx, wy; |
966 |
unsigned int statemask; |
967 |
int n; |
968 |
char buf[8]; |
969 |
|
970 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
971 |
if (n != 1) |
972 |
return; |
973 |
switch (buf[0]) { |
974 |
case 'h': /* turn on height motion lock */ |
975 |
viewflags |= VWHEADLOCK; |
976 |
return; |
977 |
case 'H': /* turn off height motion lock */ |
978 |
viewflags &= ~VWHEADLOCK; |
979 |
return; |
980 |
case 'l': /* retrieve last view */ |
981 |
inpresflags |= DFL(DC_LASTVIEW); |
982 |
return; |
983 |
case 'p': /* pause computation */ |
984 |
inpresflags |= DFL(DC_PAUSE); |
985 |
return; |
986 |
case 'v': /* spit out view */ |
987 |
inpresflags |= DFL(DC_GETVIEW); |
988 |
return; |
989 |
case 'f': /* frame view position */ |
990 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
991 |
&rootx, &rooty, &wx, &wy, &statemask)) |
992 |
return; /* on another screen */ |
993 |
sprintf(odev_args, "%.4f %.4f", (wx+.5)/odev.hres, |
994 |
1.-(wy+.5)/odev.vres); |
995 |
inpresflags |= DFL(DC_FOCUS); |
996 |
return; |
997 |
case 'F': /* unfocus */ |
998 |
odev_args[0] = '\0'; |
999 |
inpresflags |= DFL(DC_FOCUS); |
1000 |
return; |
1001 |
case '\n': |
1002 |
case '\r': /* resume computation */ |
1003 |
inpresflags |= DFL(DC_RESUME); |
1004 |
return; |
1005 |
case CTRL('R'): /* redraw screen */ |
1006 |
odRemap(0); /* new tone mapping */ |
1007 |
glClear(GL_DEPTH_BUFFER_BIT); |
1008 |
#ifdef STEREO |
1009 |
setstereobuf(STEREO_BUFFER_RIGHT); |
1010 |
glClear(GL_DEPTH_BUFFER_BIT); |
1011 |
setstereobuf(STEREO_BUFFER_LEFT); |
1012 |
#endif |
1013 |
return; |
1014 |
case CTRL('L'): /* refresh from server */ |
1015 |
if (inpresflags & DFL(DC_REDRAW)) |
1016 |
return; /* already called */ |
1017 |
XRaiseWindow(ourdisplay, gwind); |
1018 |
XFlush(ourdisplay); /* raise up window */ |
1019 |
sleep(1); /* wait for restacking */ |
1020 |
dev_clear(); /* clear buffer and samples */ |
1021 |
odRemap(1); /* start fresh histogram */ |
1022 |
inpresflags |= DFL(DC_REDRAW); /* resend values from server */ |
1023 |
return; |
1024 |
case 'K': /* kill rtrace process(es) */ |
1025 |
inpresflags |= DFL(DC_KILL); |
1026 |
break; |
1027 |
case 'R': /* restart rtrace */ |
1028 |
inpresflags |= DFL(DC_RESTART); |
1029 |
break; |
1030 |
case 'C': /* clobber holodeck */ |
1031 |
inpresflags |= DFL(DC_CLOBBER); |
1032 |
break; |
1033 |
case 'q': /* quit the program */ |
1034 |
inpresflags |= DFL(DC_QUIT); |
1035 |
return; |
1036 |
default: |
1037 |
XBell(ourdisplay, 0); |
1038 |
return; |
1039 |
} |
1040 |
} |
1041 |
|
1042 |
|
1043 |
static |
1044 |
fixwindow(eexp) /* repair damage to window */ |
1045 |
register XExposeEvent *eexp; |
1046 |
{ |
1047 |
int xmin, ymin, xmax, ymax; |
1048 |
|
1049 |
if (odev.hres == 0 | odev.vres == 0) { /* first exposure */ |
1050 |
resizewindow((XConfigureEvent *)eexp); |
1051 |
return; |
1052 |
} |
1053 |
xmin = eexp->x; xmax = eexp->x + eexp->width; |
1054 |
ymin = odev.vres - eexp->y - eexp->height; ymax = odev.vres - eexp->y; |
1055 |
|
1056 |
if (xmin <= 0 && xmax >= odev.hres-1 && |
1057 |
ymin <= 0 && ymax >= odev.vres) { |
1058 |
DCHECK(eexp->count, WARNING, "multiple clear in fixwindow"); |
1059 |
wipeclean(); /* make sure we're go */ |
1060 |
return; |
1061 |
} |
1062 |
/* clear portion of depth */ |
1063 |
glPushAttrib(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT); |
1064 |
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); |
1065 |
glDepthFunc(GL_ALWAYS); |
1066 |
glBegin(GL_POLYGON); |
1067 |
glVertex3i(xmin, ymin, OMAXDEPTH); |
1068 |
glVertex3i(xmax, ymin, OMAXDEPTH); |
1069 |
glVertex3i(xmax, ymax, OMAXDEPTH); |
1070 |
glVertex3i(xmin, ymax, OMAXDEPTH); |
1071 |
glEnd(); |
1072 |
#ifdef STEREO |
1073 |
setstereobuf(STEREO_BUFFER_RIGHT); |
1074 |
glBegin(GL_POLYGON); |
1075 |
glVertex3i(xmin, ymin, OMAXDEPTH); |
1076 |
glVertex3i(xmax, ymin, OMAXDEPTH); |
1077 |
glVertex3i(xmax, ymax, OMAXDEPTH); |
1078 |
glVertex3i(xmin, ymax, OMAXDEPTH); |
1079 |
glEnd(); |
1080 |
odRedraw(1, xmin, ymin, xmax, ymax); |
1081 |
setstereobuf(STEREO_BUFFER_LEFT); |
1082 |
#endif |
1083 |
glPopAttrib(); |
1084 |
odRedraw(0, xmin, ymin, xmax, ymax); |
1085 |
} |
1086 |
|
1087 |
|
1088 |
static |
1089 |
resizewindow(ersz) /* resize window */ |
1090 |
register XConfigureEvent *ersz; |
1091 |
{ |
1092 |
glViewport(0, 0, ersz->width, ersz->height); |
1093 |
|
1094 |
if (ersz->width == odev.hres && ersz->height == odev.vres) |
1095 |
return; |
1096 |
|
1097 |
odev.hres = ersz->width; |
1098 |
odev.vres = ersz->height; |
1099 |
|
1100 |
odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres); |
1101 |
odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres); |
1102 |
|
1103 |
inpresflags |= DFL(DC_SETVIEW); |
1104 |
viewflags |= VWCHANGE; |
1105 |
} |