1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rhd_glx1.c,v 3.1 2003/02/22 02:07:24 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* OpenGL GLX driver for holodeck display. |
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* Based on x11 driver. |
7 |
*/ |
8 |
|
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#include "standard.h" |
10 |
|
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#include <GL/glx.h> |
12 |
|
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#include "rhd_qtree.h" |
14 |
|
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#include "x11icon.h" |
16 |
|
17 |
#ifndef RAYQLEN |
18 |
#define RAYQLEN 50000 /* max. rays to queue before flush */ |
19 |
#endif |
20 |
|
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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 |
24 |
|
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#ifndef MAXCONE |
26 |
#define MAXCONE 16 /* number of different cone sizes */ |
27 |
#endif |
28 |
#ifndef MAXVERT |
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#define MAXVERT 64 /* maximum number of cone vertices */ |
30 |
#endif |
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#ifndef MINVERT |
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#define MINVERT 4 /* minimum number of cone vertices */ |
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#endif |
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#ifndef DEPTHFACT |
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#define DEPTHFACT 16. /* multiplier for depth tests */ |
36 |
#endif |
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|
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#define GAMMA 1.4 /* default gamma correction */ |
39 |
|
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#define MOVPCT 7 /* percent distance to move /frame */ |
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#define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1) |
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#define MOVDEG (-5) /* degrees to orbit CW/down /frame */ |
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#define MOVORB(s) ((s)&ShiftMask ? 1 : (s)&ControlMask ? -1 : 0) |
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|
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#define MINWIDTH 480 /* minimum graphics window width */ |
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#define MINHEIGHT 400 /* minimum graphics window height */ |
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|
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#define VIEWDIST 356 /* assumed viewing distance (mm) */ |
49 |
|
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#define BORWIDTH 5 /* border width */ |
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|
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#define ourscreen DefaultScreen(ourdisplay) |
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#define ourroot RootWindow(ourdisplay,ourscreen) |
54 |
#define ourmask (StructureNotifyMask|ExposureMask|KeyPressMask|\ |
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ButtonPressMask|ButtonReleaseMask) |
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|
57 |
#define levptr(etype) ((etype *)¤tevent) |
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|
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struct driver odev; /* global device driver structure */ |
60 |
|
61 |
char odev_args[64]; /* command arguments */ |
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|
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static XEvent currentevent; /* current event */ |
64 |
|
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static int mapped = 0; /* window is mapped? */ |
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static unsigned long ourblack=0, ourwhite=~0; |
67 |
|
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static Display *ourdisplay = NULL; /* our display */ |
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static XVisualInfo *ourvinf; /* our visual information */ |
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static Window gwind = 0; /* our graphics window */ |
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static GLXContext gctx; /* our GLX context */ |
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|
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static double pwidth, pheight; /* pixel dimensions (mm) */ |
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|
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static double curzmax = 1e4; /* current depth upper limit */ |
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static double nxtzmax = 0.; /* maximum (finite) depth so far */ |
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|
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static struct { |
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double rad; /* cone radius */ |
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int nverts; /* number of vertices */ |
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FVECT *va; /* allocated vertex array */ |
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} cone[MAXCONE]; /* precomputed cones for drawing */ |
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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(), |
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initcones(), freecones(), |
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getmove(), fixwindow(), mytmflags(); |
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|
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|
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dev_open(id) /* initialize X11 driver */ |
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char *id; |
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{ |
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extern char *getenv(); |
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static 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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/* set quadtree globals */ |
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qtMinNodesiz = 3; |
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qtDepthEps = 0.07; |
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/* open display server */ |
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ourdisplay = XOpenDisplay(NULL); |
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if (ourdisplay == NULL) |
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error(USER, "cannot open X-windows; DISPLAY variable set?\n"); |
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/* find a usable visual */ |
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ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlBest); |
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if (ourvinf == NULL) |
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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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DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH, |
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BORWIDTH, ourvinf->depth, InputOutput, ourvinf->visual, |
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CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &ourwinattr); |
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if (gwind == 0) |
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error(SYSTEM, "cannot create window\n"); |
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XStoreName(ourdisplay, gwind, id); |
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/* set window manager hints */ |
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ourxwmhints.flags = InputHint|IconPixmapHint; |
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ourxwmhints.input = True; |
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ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay, |
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gwind, x11icon_bits, x11icon_width, x11icon_height); |
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XSetWMHints(ourdisplay, gwind, &ourxwmhints); |
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oursizhints.min_width = MINWIDTH; |
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oursizhints.min_height = MINHEIGHT; |
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oursizhints.flags = PMinSize; |
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XSetNormalHints(ourdisplay, gwind, &oursizhints); |
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/* set GLX context */ |
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glXMakeCurrent(ourdisplay, gwind, gctx); |
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glEnable(GL_DEPTH_TEST); |
161 |
glDepthFunc(GL_LEQUAL); |
162 |
glShadeModel(GL_FLAT); |
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glDisable(GL_DITHER); |
164 |
glDisable(GL_CULL_FACE); |
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glMatrixMode(GL_PROJECTION); |
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glOrtho(0., 1., 0., 1., -.01, 1.01); |
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glTranslated(0., 0., -1.01); |
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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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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 leaf pile */ |
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if (!qtAllocLeaves(DisplayWidth(ourdisplay,ourscreen) * |
180 |
DisplayHeight(ourdisplay,ourscreen) * 3 / |
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(qtMinNodesiz*qtMinNodesiz*2))) |
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error(SYSTEM, "insufficient memory for value storage"); |
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odev.name = id; |
184 |
odev.ifd = ConnectionNumber(ourdisplay); |
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/* initialize cone array */ |
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initcones(); |
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} |
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|
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|
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dev_close() /* close our display and free resources */ |
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{ |
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glXMakeCurrent(ourdisplay, None, NULL); |
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glXDestroyContext(ourdisplay, gctx); |
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XDestroyWindow(ourdisplay, gwind); |
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gwind = 0; |
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XCloseDisplay(ourdisplay); |
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ourdisplay = NULL; |
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qtFreeLeaves(); |
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tmDone(NULL); |
200 |
freecones(); |
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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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|
207 |
dev_clear() /* clear our quadtree */ |
208 |
{ |
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qtCompost(100); |
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glClear(GL_DEPTH_BUFFER_BIT); |
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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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{ |
219 |
if (nv->type == VT_PAR || /* 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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} |
227 |
if (nv->vfore > FTINY) { |
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error(COMMAND, "cannot handle fore clipping"); |
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nv->vfore = 0.; |
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return(0); |
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} |
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if (nv != &odev.v) { |
233 |
if (!FEQ(nv->horiz,odev.v.horiz) || /* resize window? */ |
234 |
!FEQ(nv->vert,odev.v.vert)) { |
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int dw = DisplayWidth(ourdisplay,ourscreen); |
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int dh = DisplayHeight(ourdisplay,ourscreen); |
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|
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dw -= 25; /* for window frame */ |
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dh -= 50; |
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odev.hres = 2.*VIEWDIST/pwidth * |
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tan(PI/180./2.*nv->horiz); |
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odev.vres = 2.*VIEWDIST/pheight * |
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tan(PI/180./2.*nv->vert); |
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if (odev.hres > dw) { |
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odev.vres = dw * odev.vres / odev.hres; |
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odev.hres = dw; |
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} |
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if (odev.vres > dh) { |
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odev.hres = dh * odev.hres / odev.vres; |
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odev.vres = dh; |
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} |
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XResizeWindow(ourdisplay, gwind, odev.hres, odev.vres); |
253 |
dev_input(); /* get resize event */ |
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} |
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odev.v = *nv; |
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} |
257 |
if (nxtzmax > FTINY) { |
258 |
curzmax = nxtzmax; |
259 |
nxtzmax = 0.; |
260 |
} |
261 |
glClear(GL_DEPTH_BUFFER_BIT); |
262 |
qtReplant(); |
263 |
return(1); |
264 |
} |
265 |
|
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|
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dev_section(ofn) /* add octree for geometry rendering */ |
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char *ofn; |
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{ |
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/* unimplemented */ |
271 |
} |
272 |
|
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|
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dev_auxcom(cmd, args) /* process an auxiliary command */ |
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char *cmd, *args; |
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{ |
277 |
sprintf(errmsg, "%s: unknown command", cmd); |
278 |
error(COMMAND, errmsg); |
279 |
} |
280 |
|
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|
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VIEW * |
283 |
dev_auxview(n, hvres) /* return nth auxiliary view */ |
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int n; |
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int hvres[2]; |
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{ |
287 |
if (n) |
288 |
return(NULL); |
289 |
hvres[0] = odev.hres; hvres[1] = odev.vres; |
290 |
return(&odev.v); |
291 |
} |
292 |
|
293 |
|
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int |
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dev_input() /* get X11 input */ |
296 |
{ |
297 |
inpresflags = 0; |
298 |
|
299 |
do |
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getevent(); |
301 |
|
302 |
while (XQLength(ourdisplay) > 0); |
303 |
|
304 |
return(inpresflags); |
305 |
} |
306 |
|
307 |
|
308 |
int |
309 |
dev_flush() /* flush output */ |
310 |
{ |
311 |
qtUpdate(); |
312 |
glFlush(); |
313 |
rayqleft = RAYQLEN; |
314 |
return(XPending(ourdisplay)); |
315 |
} |
316 |
|
317 |
|
318 |
dev_cone(rgb, ip, rad) /* render a cone in view coordinates */ |
319 |
BYTE rgb[3]; |
320 |
FVECT ip; |
321 |
double rad; |
322 |
{ |
323 |
register int ci, j; |
324 |
double apexh, basez; |
325 |
/* is window mapped? */ |
326 |
if (!mapped) |
327 |
return; |
328 |
/* compute apex height (0. to 1.) */ |
329 |
if (ip[2] > 1e6) |
330 |
apexh = 1. - 1./DEPTHFACT; |
331 |
else { |
332 |
if (ip[2] > nxtzmax) |
333 |
nxtzmax = ip[2]; |
334 |
if (ip[2] >= curzmax) |
335 |
apexh = 1. - 1./DEPTHFACT; |
336 |
else |
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apexh = 1. - ip[2]/(curzmax*DEPTHFACT); |
338 |
} |
339 |
rad *= 1.25; /* find conservative cone match */ |
340 |
for (ci = 0; ci < MAXCONE-1; ci++) |
341 |
if (cone[ci].rad >= rad) |
342 |
break; |
343 |
/* draw it */ |
344 |
glColor3ub(rgb[0], rgb[1], rgb[2]); |
345 |
glBegin(GL_TRIANGLE_FAN); |
346 |
glVertex3d(ip[0], ip[1], apexh); /* start with apex */ |
347 |
basez = apexh*cone[ci].va[0][2]; /* base z's all the same */ |
348 |
for (j = 0; j < cone[ci].nverts; j++) /* draw each face */ |
349 |
glVertex3d(ip[0]+cone[ci].va[j][0], ip[1]+cone[ci].va[j][1], |
350 |
basez); |
351 |
/* connect last to first */ |
352 |
glVertex3d(ip[0]+cone[ci].va[0][0], ip[1]+cone[ci].va[0][1], basez); |
353 |
glEnd(); /* all done */ |
354 |
} |
355 |
|
356 |
|
357 |
static int |
358 |
mytmflags() /* figure out tone mapping flags */ |
359 |
{ |
360 |
extern char *progname; |
361 |
register char *cp, *tail; |
362 |
/* find basic name */ |
363 |
for (cp = tail = progname; *cp; cp++) |
364 |
if (*cp == '/') |
365 |
tail = cp+1; |
366 |
for (cp = tail; *cp && *cp != '.'; cp++) |
367 |
; |
368 |
if (cp-tail == 4 && !strncmp(tail, "glx1", 4)) |
369 |
return(TM_F_CAMERA|TM_F_NOSTDERR); |
370 |
if (cp-tail == 5 && !strncmp(tail, "glx1h", 5)) |
371 |
return(TM_F_HUMAN|TM_F_NOSTDERR); |
372 |
error(USER, "illegal driver name"); |
373 |
} |
374 |
|
375 |
|
376 |
static |
377 |
initcones() /* initialize cone vertices */ |
378 |
{ |
379 |
register int i, j; |
380 |
double minrad, d; |
381 |
|
382 |
if (cone[0].nverts) |
383 |
freecones(); |
384 |
minrad = 2.*qtMinNodesiz/(double)(DisplayWidth(ourdisplay,ourscreen) + |
385 |
DisplayHeight(ourdisplay,ourscreen)); |
386 |
for (i = 0; i < MAXCONE; i++) { |
387 |
d = (double)i/(MAXCONE-1); d *= d; /* x^2 distribution */ |
388 |
cone[i].rad = minrad + (1.-minrad)*d; |
389 |
cone[i].nverts = MINVERT + 0.5 + (MAXVERT-MINVERT)*d; |
390 |
cone[i].va = (FVECT *)malloc(cone[i].nverts*sizeof(FVECT)); |
391 |
if (cone[i].va == NULL) |
392 |
error(SYSTEM, "out of memory in initcones"); |
393 |
for (j = cone[i].nverts; j--; ) { |
394 |
d = 2.*PI * (j+.5) / (cone[i].nverts); |
395 |
cone[i].va[j][0] = cos(d) * cone[i].rad; |
396 |
cone[i].va[j][1] = sin(d) * cone[i].rad; |
397 |
cone[i].va[j][2] = 1. - cone[i].rad; |
398 |
} |
399 |
} |
400 |
} |
401 |
|
402 |
|
403 |
static |
404 |
freecones() /* free cone vertices */ |
405 |
{ |
406 |
register int i; |
407 |
|
408 |
for (i = MAXCONE; i--; ) |
409 |
if (cone[i].nverts) { |
410 |
free((void *)cone[i].va); |
411 |
cone[i].va = NULL; |
412 |
cone[i].nverts = 0; |
413 |
} |
414 |
} |
415 |
|
416 |
|
417 |
static |
418 |
getevent() /* get next event */ |
419 |
{ |
420 |
XNextEvent(ourdisplay, levptr(XEvent)); |
421 |
switch (levptr(XEvent)->type) { |
422 |
case ConfigureNotify: |
423 |
resizewindow(levptr(XConfigureEvent)); |
424 |
break; |
425 |
case UnmapNotify: |
426 |
mapped = 0; |
427 |
break; |
428 |
case MapNotify: |
429 |
mapped = 1; |
430 |
break; |
431 |
case Expose: |
432 |
fixwindow(levptr(XExposeEvent)); |
433 |
break; |
434 |
case KeyPress: |
435 |
getkey(levptr(XKeyPressedEvent)); |
436 |
break; |
437 |
case ButtonPress: |
438 |
getmove(levptr(XButtonPressedEvent)); |
439 |
break; |
440 |
} |
441 |
} |
442 |
|
443 |
|
444 |
static |
445 |
draw3dline(wp) /* draw 3d line in world coordinates */ |
446 |
register FVECT wp[2]; |
447 |
{ |
448 |
glVertex3d(wp[0][0], wp[0][1], wp[0][2]); |
449 |
glVertex3d(wp[1][0], wp[1][1], wp[1][2]); |
450 |
} |
451 |
|
452 |
|
453 |
static |
454 |
draw_grids() /* draw holodeck section grids */ |
455 |
{ |
456 |
static BYTE gridrgba[4] = {0x0, 0xff, 0xff, 0x00}; |
457 |
double xmin, xmax, ymin, ymax, zmin, zmax; |
458 |
double d, cx, sx, crad; |
459 |
FVECT vx, vy; |
460 |
register int i, j; |
461 |
/* can we even do it? */ |
462 |
if (!mapped || odev.v.type != VT_PER) |
463 |
return; |
464 |
/* compute view frustum */ |
465 |
if (normalize(odev.v.vdir) == 0.0) |
466 |
return; |
467 |
zmin = 0.01; |
468 |
zmax = 10000.; |
469 |
if (odev.v.vfore > FTINY) |
470 |
zmin = odev.v.vfore; |
471 |
if (odev.v.vaft > FTINY) |
472 |
zmax = odev.v.vaft; |
473 |
xmax = zmin * tan(PI/180./2. * odev.v.horiz); |
474 |
xmin = -xmax; |
475 |
d = odev.v.hoff * (xmax - xmin); |
476 |
xmin += d; xmax += d; |
477 |
ymax = zmin * tan(PI/180./2. * odev.v.vert); |
478 |
ymin = -ymax; |
479 |
d = odev.v.voff * (ymax - ymin); |
480 |
ymin += d; ymax += d; |
481 |
/* set view matrix */ |
482 |
glMatrixMode(GL_PROJECTION); |
483 |
glPushMatrix(); |
484 |
glLoadIdentity(); |
485 |
glFrustum(xmin, xmax, ymin, ymax, zmin, zmax); |
486 |
gluLookAt(odev.v.vp[0], odev.v.vp[1], odev.v.vp[2], |
487 |
odev.v.vp[0] + odev.v.vdir[0], |
488 |
odev.v.vp[1] + odev.v.vdir[1], |
489 |
odev.v.vp[2] + odev.v.vdir[2], |
490 |
odev.v.vup[0], odev.v.vup[1], odev.v.vup[2]); |
491 |
glDisable(GL_DEPTH_TEST); /* write no depth values */ |
492 |
glColor4ub(gridrgba[0], gridrgba[1], gridrgba[2], gridrgba[3]); |
493 |
glBegin(GL_LINES); /* draw each grid line */ |
494 |
gridlines(draw3dline); |
495 |
glEnd(); |
496 |
glEnable(GL_DEPTH_TEST); /* restore rendering params */ |
497 |
glPopMatrix(); |
498 |
} |
499 |
|
500 |
|
501 |
static |
502 |
moveview(dx, dy, mov, orb) /* move our view */ |
503 |
int dx, dy, mov, orb; |
504 |
{ |
505 |
VIEW nv; |
506 |
FVECT odir, v1; |
507 |
double d; |
508 |
register int li; |
509 |
/* start with old view */ |
510 |
nv = odev.v; |
511 |
/* change view direction */ |
512 |
if (mov | orb) { |
513 |
if ((li = qtFindLeaf(dx, dy)) < 0) |
514 |
return(0); /* not on window */ |
515 |
VSUM(odir, qtL.wp[li], nv.vp, -1.); |
516 |
} else { |
517 |
if (viewray(nv.vp, nv.vdir, &odev.v, |
518 |
(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY) |
519 |
return(0); /* outside view */ |
520 |
} |
521 |
if (orb && mov) { /* orbit left/right */ |
522 |
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov); |
523 |
VSUM(nv.vp, qtL.wp[li], odir, -1.); |
524 |
spinvector(nv.vdir, nv.vdir, nv.vup, d); |
525 |
} else if (orb) { /* orbit up/down */ |
526 |
fcross(v1, odir, nv.vup); |
527 |
if (normalize(v1) == 0.) |
528 |
return(0); |
529 |
spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb); |
530 |
VSUM(nv.vp, qtL.wp[li], odir, -1.); |
531 |
spinvector(nv.vdir, nv.vdir, v1, d); |
532 |
} else if (mov) { /* move forward/backward */ |
533 |
d = MOVPCT/100. * mov; |
534 |
VSUM(nv.vp, nv.vp, odir, d); |
535 |
} |
536 |
if (!mov ^ !orb && headlocked) { /* restore head height */ |
537 |
VSUM(v1, odev.v.vp, nv.vp, -1.); |
538 |
d = DOT(v1, odev.v.vup); |
539 |
VSUM(nv.vp, nv.vp, odev.v.vup, d); |
540 |
} |
541 |
if (setview(&nv) != NULL) |
542 |
return(0); /* illegal view */ |
543 |
dev_view(&nv); |
544 |
inpresflags |= DFL(DC_SETVIEW); |
545 |
return(1); |
546 |
} |
547 |
|
548 |
|
549 |
static |
550 |
getmove(ebut) /* get view change */ |
551 |
XButtonPressedEvent *ebut; |
552 |
{ |
553 |
int movdir = MOVDIR(ebut->button); |
554 |
int movorb = MOVORB(ebut->state); |
555 |
int oldnodesiz = qtMinNodesiz; |
556 |
Window rootw, childw; |
557 |
int rootx, rooty, wx, wy; |
558 |
unsigned int statemask; |
559 |
|
560 |
qtMinNodesiz = 24; /* accelerate update rate */ |
561 |
XNoOp(ourdisplay); |
562 |
|
563 |
while (!XCheckMaskEvent(ourdisplay, |
564 |
ButtonReleaseMask, levptr(XEvent))) { |
565 |
|
566 |
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
567 |
&rootx, &rooty, &wx, &wy, &statemask)) |
568 |
break; /* on another screen */ |
569 |
|
570 |
if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) { |
571 |
sleep(1); |
572 |
continue; |
573 |
} |
574 |
glClear(GL_COLOR_BUFFER_BIT); |
575 |
qtUpdate(); |
576 |
draw_grids(); |
577 |
glFlush(); |
578 |
} |
579 |
if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */ |
580 |
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
581 |
wx = levptr(XButtonReleasedEvent)->x; |
582 |
wy = levptr(XButtonReleasedEvent)->y; |
583 |
moveview(wx, odev.vres-1-wy, movdir, movorb); |
584 |
} |
585 |
dev_flush(); |
586 |
|
587 |
qtMinNodesiz = oldnodesiz; /* restore quadtree resolution */ |
588 |
} |
589 |
|
590 |
|
591 |
static |
592 |
getkey(ekey) /* get input key */ |
593 |
register XKeyPressedEvent *ekey; |
594 |
{ |
595 |
int n; |
596 |
char buf[8]; |
597 |
|
598 |
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
599 |
if (n != 1) |
600 |
return; |
601 |
switch (buf[0]) { |
602 |
case 'h': /* turn on height motion lock */ |
603 |
headlocked = 1; |
604 |
return; |
605 |
case 'H': /* turn off height motion lock */ |
606 |
headlocked = 0; |
607 |
return; |
608 |
case 'l': /* retrieve last view */ |
609 |
inpresflags |= DFL(DC_LASTVIEW); |
610 |
return; |
611 |
case 'p': /* pause computation */ |
612 |
inpresflags |= DFL(DC_PAUSE); |
613 |
return; |
614 |
case 'v': /* spit out view */ |
615 |
inpresflags |= DFL(DC_GETVIEW); |
616 |
return; |
617 |
case '\n': |
618 |
case '\r': /* resume computation */ |
619 |
inpresflags |= DFL(DC_RESUME); |
620 |
return; |
621 |
case CTRL('R'): /* redraw screen */ |
622 |
if (nxtzmax > FTINY) { |
623 |
curzmax = nxtzmax; |
624 |
nxtzmax = 0.; |
625 |
} |
626 |
glClear(GL_DEPTH_BUFFER_BIT); |
627 |
qtRedraw(0, 0, odev.hres, odev.vres); |
628 |
return; |
629 |
case CTRL('L'): /* refresh from server */ |
630 |
if (inpresflags & DFL(DC_REDRAW)) |
631 |
return; |
632 |
if (nxtzmax > FTINY) { |
633 |
curzmax = nxtzmax; |
634 |
nxtzmax = 0.; |
635 |
} |
636 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
637 |
draw_grids(); |
638 |
glFlush(); |
639 |
qtCompost(100); /* get rid of old values */ |
640 |
inpresflags |= DFL(DC_REDRAW); /* resend values from server */ |
641 |
rayqleft = 0; /* hold off update */ |
642 |
return; |
643 |
case 'K': /* kill rtrace process(es) */ |
644 |
inpresflags |= DFL(DC_KILL); |
645 |
break; |
646 |
case 'R': /* restart rtrace */ |
647 |
inpresflags |= DFL(DC_RESTART); |
648 |
break; |
649 |
case 'C': /* clobber holodeck */ |
650 |
inpresflags |= DFL(DC_CLOBBER); |
651 |
break; |
652 |
case 'q': /* quit the program */ |
653 |
inpresflags |= DFL(DC_QUIT); |
654 |
return; |
655 |
default: |
656 |
XBell(ourdisplay, 0); |
657 |
return; |
658 |
} |
659 |
} |
660 |
|
661 |
|
662 |
static |
663 |
fixwindow(eexp) /* repair damage to window */ |
664 |
register XExposeEvent *eexp; |
665 |
{ |
666 |
int xmin, xmax, ymin, ymax; |
667 |
|
668 |
if (odev.hres == 0 || odev.vres == 0) /* first exposure */ |
669 |
resizewindow((XConfigureEvent *)eexp); |
670 |
xmin = eexp->x; xmax = eexp->x + eexp->width; |
671 |
ymin = odev.vres - eexp->y - eexp->height; ymax = odev.vres - eexp->y; |
672 |
/* clear portion of depth */ |
673 |
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); |
674 |
glDepthFunc(GL_ALWAYS); |
675 |
glBegin(GL_POLYGON); |
676 |
glVertex3d((double)xmin/odev.hres, (double)ymin/odev.vres, 0.); |
677 |
glVertex3d((double)xmax/odev.hres, (double)ymin/odev.vres, 0.); |
678 |
glVertex3d((double)xmax/odev.hres, (double)ymax/odev.vres, 0.); |
679 |
glVertex3d((double)xmin/odev.hres, (double)ymax/odev.vres, 0.); |
680 |
glEnd(); |
681 |
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); |
682 |
glDepthFunc(GL_LEQUAL); |
683 |
qtRedraw(xmin, ymin, xmax, ymax); |
684 |
} |
685 |
|
686 |
|
687 |
static |
688 |
resizewindow(ersz) /* resize window */ |
689 |
register XConfigureEvent *ersz; |
690 |
{ |
691 |
glViewport(0, 0, ersz->width, ersz->height); |
692 |
|
693 |
if (ersz->width == odev.hres && ersz->height == odev.vres) |
694 |
return; |
695 |
|
696 |
odev.hres = ersz->width; |
697 |
odev.vres = ersz->height; |
698 |
|
699 |
odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres); |
700 |
odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres); |
701 |
|
702 |
inpresflags |= DFL(DC_SETVIEW); |
703 |
} |