6 |
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|
7 |
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/* |
8 |
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* OpenGL GLX driver for holodeck display. |
9 |
< |
* Based on rview driver. |
9 |
> |
* Based on x11 driver. |
10 |
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*/ |
11 |
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|
12 |
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#include "standard.h" |
26 |
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#endif |
27 |
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|
28 |
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#ifndef FREEPCT |
29 |
< |
#define FREEPCT 25 /* percentage of values to free */ |
29 |
> |
#define FREEPCT 10 /* percentage of values to free */ |
30 |
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#endif |
31 |
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|
32 |
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#ifndef NCONEV |
33 |
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#define NCONEV 7 /* number of cone base vertices */ |
34 |
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#endif |
35 |
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#ifndef CONEH |
36 |
< |
#define CONEH 0.25 /* cone height (fraction of depth) */ |
36 |
> |
#define CONEH 3. /* cone height (fraction of depth) */ |
37 |
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#endif |
38 |
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#ifndef CONEW |
39 |
< |
#define CONEW 0.035 /* cone width (fraction of screen) */ |
39 |
> |
#define CONEW 0.05 /* cone width (fraction of screen) */ |
40 |
|
#endif |
41 |
+ |
#ifndef DIRPEN |
42 |
+ |
#define DIRPEN 0.001 /* direction penalty factor */ |
43 |
+ |
#endif |
44 |
+ |
#ifndef VALUA |
45 |
+ |
#define VALUA 16 /* target value area (pixels) */ |
46 |
+ |
#endif |
47 |
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|
48 |
< |
#define GAMMA 2.2 /* default gamma correction */ |
48 |
> |
#define GAMMA 1.4 /* default gamma correction */ |
49 |
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|
50 |
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#define MOVPCT 7 /* percent distance to move /frame */ |
51 |
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#define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1) |
71 |
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static XEvent currentevent; /* current event */ |
72 |
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|
73 |
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static int mapped = 0; /* window is mapped? */ |
68 |
– |
static unsigned long *pixval = NULL; /* allocated pixels */ |
74 |
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static unsigned long ourblack=0, ourwhite=~0; |
75 |
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|
76 |
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static Display *ourdisplay = NULL; /* our display */ |
79 |
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static GLXContext gctx; /* our GLX context */ |
80 |
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|
81 |
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static double mindepth = FHUGE; /* minimum depth value so far */ |
82 |
< |
static double maxdepth = 0.; /* maximum depth value */ |
82 |
> |
static double maxdepth = 0.; /* maximum depth value so far */ |
83 |
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|
84 |
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static double pwidth, pheight; /* pixel dimensions (mm) */ |
85 |
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|
90 |
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|
91 |
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static int headlocked = 0; /* lock vertical motion */ |
92 |
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|
93 |
+ |
static int quicken = 0; /* quicker, sloppier update rate? */ |
94 |
+ |
|
95 |
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static struct { |
96 |
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float (*wp)[3]; /* world intersection point array */ |
97 |
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int4 *wd; /* world direction array */ |
106 |
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char *base; /* base of allocated memory */ |
107 |
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} rV; /* our collection of values */ |
108 |
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|
109 |
+ |
static int *valmap = NULL; /* sorted map of screen values */ |
110 |
+ |
static int vmaplen = 0; /* value map length */ |
111 |
+ |
|
112 |
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#define redraw() (rV.drl = rV.bl) |
113 |
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|
114 |
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static int resizewindow(), getevent(), getkey(), moveview(), |
115 |
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setGLview(), getmove(), fixwindow(), mytmflags(), |
116 |
< |
newvalue(), drawvalue(), Compost(), |
117 |
< |
FindValue(), AllocValues(), TMapValues(), FreeValues(); |
116 |
> |
drawvalue(), valcmp(), clralphas(), setalphas(), mergalphas(), |
117 |
> |
IndexValue(), Compost(), FindValue(), TMapValues(), |
118 |
> |
AllocValues(), FreeValues(); |
119 |
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|
120 |
+ |
extern int4 encodedir(); |
121 |
+ |
extern double fdir2diff(), dir2diff(); |
122 |
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|
123 |
+ |
|
124 |
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dev_open(id) /* initialize X11 driver */ |
125 |
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char *id; |
126 |
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{ |
127 |
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extern char *getenv(); |
128 |
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static int atlBest[] = {GLX_RGBA, GLX_RED_SIZE,8, |
129 |
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GLX_GREEN_SIZE,8, GLX_BLUE_SIZE,8, |
130 |
< |
GLX_ALPHA_SIZE,8, GLX_DEPTH_SIZE,23, |
131 |
< |
/*GLX_DOUBLEBUFFER,*/ None}; |
118 |
< |
static int atlOK[] = {GLX_RGBA, GLX_RED_SIZE,4, |
119 |
< |
GLX_GREEN_SIZE,4, GLX_BLUE_SIZE,4, |
120 |
< |
GLX_ALPHA_SIZE,4, GLX_DEPTH_SIZE,15, |
121 |
< |
/*GLX_DOUBLEBUFFER,*/ None}; |
130 |
> |
GLX_ALPHA_SIZE,8, GLX_DEPTH_SIZE,15, |
131 |
> |
None}; |
132 |
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char *gv; |
133 |
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double gamval = GAMMA; |
134 |
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XSetWindowAttributes ourwinattr; |
141 |
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/* find a usable visual */ |
142 |
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ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlBest); |
143 |
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if (ourvinf == NULL) |
134 |
– |
ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlOK); |
135 |
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if (ourvinf == NULL) |
144 |
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error(USER, "no suitable visuals available"); |
145 |
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/* get a context */ |
146 |
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gctx = glXCreateContext(ourdisplay, ourvinf, NULL, GL_TRUE); |
175 |
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oursizhints.min_height = MINHEIGHT; |
176 |
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oursizhints.flags = PMinSize; |
177 |
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XSetNormalHints(ourdisplay, gwind, &oursizhints); |
178 |
< |
/* map the window and get its size */ |
179 |
< |
XMapWindow(ourdisplay, gwind); |
180 |
< |
dev_input(); |
181 |
< |
/* allocate our value list */ |
182 |
< |
if (!AllocValues(DisplayWidth(ourdisplay,ourscreen) * |
183 |
< |
DisplayHeight(ourdisplay,ourscreen) / 4)) |
176 |
< |
error(SYSTEM, "insufficient memory for value storage"); |
178 |
> |
/* set GLX context */ |
179 |
> |
glXMakeCurrent(ourdisplay, gwind, gctx); |
180 |
> |
glEnable(GL_DEPTH_TEST); |
181 |
> |
glDepthFunc(GL_LEQUAL); |
182 |
> |
glShadeModel(GL_FLAT); |
183 |
> |
glDisable(GL_DITHER); |
184 |
|
/* figure out sensible view */ |
185 |
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pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) / |
186 |
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DisplayWidth(ourdisplay, ourscreen); |
188 |
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DisplayHeight(ourdisplay, ourscreen); |
189 |
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copystruct(&odev.v, &stdview); |
190 |
|
odev.v.type = VT_PER; |
191 |
< |
odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres); |
192 |
< |
odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres); |
191 |
> |
/* map the window */ |
192 |
> |
XMapWindow(ourdisplay, gwind); |
193 |
> |
dev_input(); /* sets size and view angles */ |
194 |
> |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
195 |
> |
/* allocate our value list */ |
196 |
> |
if (!AllocValues(DisplayWidth(ourdisplay,ourscreen) * |
197 |
> |
DisplayHeight(ourdisplay,ourscreen) / VALUA)) |
198 |
> |
error(SYSTEM, "insufficient memory for value storage"); |
199 |
|
odev.name = id; |
200 |
|
odev.ifd = ConnectionNumber(ourdisplay); |
188 |
– |
/* set GLX context and clear buffers */ |
189 |
– |
glXMakeCurrent(ourdisplay, gwind, gctx); |
190 |
– |
glEnable(GL_DEPTH_TEST); |
191 |
– |
glDepthFunc(GL_LEQUAL); |
192 |
– |
glShadeModel(GL_FLAT); |
193 |
– |
glDisable(GL_DITHER); |
194 |
– |
glDrawBuffer(GL_FRONT_AND_BACK); |
195 |
– |
glReadBuffer(GL_BACK); |
196 |
– |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
197 |
– |
setGLview(); /* initialize view */ |
201 |
|
} |
202 |
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|
203 |
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|
250 |
|
odev.vres = dh; |
251 |
|
} |
252 |
|
XResizeWindow(ourdisplay, gwind, odev.hres, odev.vres); |
253 |
+ |
dev_input(); /* get resize event */ |
254 |
|
} |
255 |
|
copystruct(&odev.v, nv); |
256 |
|
setGLview(); |
257 |
+ |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
258 |
+ |
redraw(); |
259 |
|
} |
254 |
– |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
255 |
– |
redraw(); |
260 |
|
return(1); |
261 |
|
} |
262 |
|
|
281 |
|
{ |
282 |
|
register int li; |
283 |
|
|
284 |
< |
li = newvalue(); |
284 |
> |
li = rV.tl++; |
285 |
> |
if (rV.tl >= rV.nl) /* get next leaf in ring */ |
286 |
> |
rV.tl = 0; |
287 |
> |
if (rV.tl == rV.bl) /* need to shake some free */ |
288 |
> |
Compost(FREEPCT); |
289 |
|
VCOPY(rV.wp[li], p); |
290 |
|
rV.wd[li] = encodedir(v); |
291 |
|
tmCvColrs(&rV.brt[li], rV.chr[li], c, 1); |
339 |
|
return; |
340 |
|
if (mindepth < maxdepth) { |
341 |
|
zmin = 0.25*mindepth; |
342 |
< |
zmax = 8.0*maxdepth; |
342 |
> |
zmax = 4.0*(1.+CONEH)*maxdepth; |
343 |
|
} else { |
344 |
|
zmin = 0.01; |
345 |
|
zmax = 1000.; |
387 |
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} |
388 |
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|
389 |
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|
390 |
< |
static int |
391 |
< |
newvalue() /* allocate a leaf from our pile */ |
384 |
< |
{ |
385 |
< |
int li; |
386 |
< |
|
387 |
< |
li = rV.tl++; |
388 |
< |
if (rV.tl >= rV.nl) /* get next leaf in ring */ |
389 |
< |
rV.tl = 0; |
390 |
< |
if (rV.tl == rV.bl) /* need to shake some free */ |
391 |
< |
Compost(FREEPCT); |
392 |
< |
return(li); |
393 |
< |
} |
390 |
> |
#define SUCCSTEP 8 /* skip step when successful */ |
391 |
> |
#define MAXSTEP 64 |
392 |
|
|
395 |
– |
|
393 |
|
static |
394 |
|
drawvalue(li) /* draw a pixel value as a cone */ |
395 |
|
register int li; |
396 |
|
{ |
397 |
< |
static FVECT apex, disp; |
398 |
< |
double d, h, v; |
397 |
> |
static int skipstep = 1; |
398 |
> |
static FVECT disp; |
399 |
> |
FVECT apex; |
400 |
> |
double d, dorg, dnew, h, v; |
401 |
|
register int i; |
402 |
< |
/* compute cone's base displacement */ |
403 |
< |
VCOPY(apex, rV.wp[li]); |
404 |
< |
disp[0] = apex[0] - odev.v.vp[0]; |
406 |
< |
disp[1] = apex[1] - odev.v.vp[1]; |
407 |
< |
disp[2] = apex[2] - odev.v.vp[2]; |
408 |
< |
if ((d = DOT(disp,odev.v.vdir)) <= odev.v.vfore || d <= FTINY) |
409 |
< |
return; |
410 |
< |
if (d > 1e5) { /* background region */ |
411 |
< |
if (odev.v.vaft > FTINY) |
402 |
> |
/* check for quicker update */ |
403 |
> |
if (quicken) { |
404 |
> |
if (li % skipstep) |
405 |
|
return; |
406 |
< |
h = maxdepth/d; |
407 |
< |
disp[0] *= h; disp[1] *= h; disp[2] *= h; |
408 |
< |
apex[0] = odev.v.vp[0] + disp[0]; |
409 |
< |
apex[1] = odev.v.vp[1] + disp[1]; |
410 |
< |
apex[2] = odev.v.vp[2] + disp[2]; |
411 |
< |
d = maxdepth; |
412 |
< |
} else if (d > maxdepth) |
413 |
< |
maxdepth = d; |
414 |
< |
h = DOT(disp,odev.v.hvec)/(d*odev.v.hn2); |
415 |
< |
v = DOT(disp,odev.v.vvec)/(d*odev.v.vn2); |
416 |
< |
if (fabs(h - odev.v.hoff) < 0.5 && fabs(v - odev.v.voff) < 0.5 && |
417 |
< |
d < mindepth) |
418 |
< |
{ |
419 |
< |
fprintf(stderr, "min depth now %lf (%lf,%lf,%lf)\n", d, apex[0], apex[1], apex[2]); |
420 |
< |
mindepth = d; |
421 |
< |
} |
406 |
> |
if (skipstep < MAXSTEP) |
407 |
> |
skipstep++; |
408 |
> |
} |
409 |
> |
/* compute cone coordinates */ |
410 |
> |
disp[0] = rV.wp[li][0] - odev.v.vp[0]; |
411 |
> |
disp[1] = rV.wp[li][1] - odev.v.vp[1]; |
412 |
> |
disp[2] = rV.wp[li][2] - odev.v.vp[2]; |
413 |
> |
dorg = DOT(disp,odev.v.vdir); |
414 |
> |
if (dorg <= odev.v.vfore) |
415 |
> |
return; /* clipped too near */ |
416 |
> |
if (odev.v.vaft > FTINY && dorg > odev.v.vaft) |
417 |
> |
return; /* clipped too far */ |
418 |
> |
if (dorg > 1e5) { /* background pixel */ |
419 |
> |
dnew = maxdepth; |
420 |
> |
d = dnew/dorg; |
421 |
> |
dorg = maxdepth; |
422 |
> |
} else { /* foreground pixel, compute penalty */ |
423 |
> |
normalize(disp); |
424 |
> |
d = dnew = dorg + coneh*fdir2diff(rV.wd[li],disp)*DIRPEN; |
425 |
> |
} |
426 |
> |
/* compute adjusted apex position */ |
427 |
> |
disp[0] *= d; disp[1] *= d; disp[2] *= d; |
428 |
> |
apex[0] = odev.v.vp[0] + disp[0]; |
429 |
> |
apex[1] = odev.v.vp[1] + disp[1]; |
430 |
> |
apex[2] = odev.v.vp[2] + disp[2]; |
431 |
> |
/* compute view position and base offset */ |
432 |
> |
h = DOT(disp,odev.v.hvec)/(dnew*odev.v.hn2); |
433 |
> |
v = DOT(disp,odev.v.vvec)/(dnew*odev.v.vn2); |
434 |
> |
if (fabs(h - odev.v.hoff) > 0.5 || fabs(v - odev.v.voff) > 0.5) |
435 |
> |
return; /* clipped off screen */ |
436 |
> |
if (dorg < mindepth) |
437 |
> |
mindepth = dorg; |
438 |
> |
if (dorg > maxdepth) |
439 |
> |
maxdepth = dorg; |
440 |
|
for (i = 0; i < 3; i++) |
441 |
|
disp[i] = apex[i] + coneh*(h*odev.v.hvec[i] + v*odev.v.vvec[i]); |
442 |
< |
/* draw pyramid (cone approx.) */ |
442 |
> |
/* draw cone (pyramid approx.) */ |
443 |
|
glColor4ub(rV.rgb[li][0], rV.rgb[li][1], rV.rgb[li][2], rV.alpha[li]); |
444 |
|
glBegin(GL_TRIANGLE_FAN); |
445 |
|
glVertex3f(apex[0], apex[1], apex[2]); |
446 |
|
for (i = 0; i < NCONEV; i++) |
447 |
|
glVertex3d(conev[i][0] + disp[0], conev[i][1] + disp[1], |
448 |
|
conev[i][2] + disp[2]); |
449 |
< |
/* connect last side to first */ |
449 |
> |
/* connect last face to first */ |
450 |
|
glVertex3d(conev[0][0] + disp[0], conev[0][1] + disp[1], |
451 |
|
conev[0][2] + disp[2]); |
452 |
< |
glEnd(); /* done */ |
452 |
> |
glEnd(); /* done */ |
453 |
> |
skipstep = SUCCSTEP; |
454 |
|
} |
455 |
|
|
456 |
+ |
#undef SUCCSTEP |
457 |
+ |
#undef MAXSTEP |
458 |
|
|
459 |
+ |
|
460 |
|
#define LEAFSIZ (3*sizeof(float)+sizeof(int4)+\ |
461 |
|
sizeof(TMbright)+7*sizeof(BYTE)) |
462 |
|
|
508 |
|
|
509 |
|
|
510 |
|
static |
511 |
+ |
clralphas() /* prepare for new alpha values */ |
512 |
+ |
{ |
513 |
+ |
if (!vmaplen) |
514 |
+ |
return; |
515 |
+ |
free((char *)valmap); |
516 |
+ |
valmap = NULL; |
517 |
+ |
vmaplen = 0; |
518 |
+ |
} |
519 |
+ |
|
520 |
+ |
|
521 |
+ |
static int |
522 |
+ |
valcmp(v1p, v2p) /* compare two pixel values */ |
523 |
+ |
int *v1p, *v2p; |
524 |
+ |
{ |
525 |
+ |
register int v1 = *v1p, v2 = *v2p; |
526 |
+ |
register int c; |
527 |
+ |
|
528 |
+ |
if ((c = rV.rgb[v1][0] - rV.rgb[v2][0])) return(c); |
529 |
+ |
if ((c = rV.rgb[v1][1] - rV.rgb[v2][1])) return(c); |
530 |
+ |
if ((c = rV.rgb[v1][2] - rV.rgb[v2][2])) return(c); |
531 |
+ |
return(rV.alpha[v1] - rV.alpha[v2]); |
532 |
+ |
} |
533 |
+ |
|
534 |
+ |
|
535 |
+ |
static |
536 |
+ |
mergalphas(adest, al1, n1, al2, n2) /* merge two sorted alpha lists */ |
537 |
+ |
register int *adest, *al1, *al2; |
538 |
+ |
int n1, n2; |
539 |
+ |
{ |
540 |
+ |
register int cmp; |
541 |
+ |
|
542 |
+ |
while (n1 | n2) { |
543 |
+ |
if (!n1) cmp = 1; |
544 |
+ |
else if (!n2) cmp = -1; |
545 |
+ |
else cmp = valcmp(al1, al2); |
546 |
+ |
if (cmp > 0) { |
547 |
+ |
*adest++ = *al2++; |
548 |
+ |
n2--; |
549 |
+ |
} else { |
550 |
+ |
*adest++ = *al1++; |
551 |
+ |
n1--; |
552 |
+ |
} |
553 |
+ |
} |
554 |
+ |
} |
555 |
+ |
|
556 |
+ |
|
557 |
+ |
static |
558 |
+ |
setalphas(vbeg, nvals) /* add values to our map and set alphas */ |
559 |
+ |
int vbeg, nvals; |
560 |
+ |
{ |
561 |
+ |
register int *newmap; |
562 |
+ |
short ccmp[3], lastalpha; |
563 |
+ |
int newmaplen; |
564 |
+ |
|
565 |
+ |
if (nvals <= 0) |
566 |
+ |
return; |
567 |
+ |
newmaplen = vmaplen + nvals; /* allocate new map */ |
568 |
+ |
newmap = (int *)malloc(newmaplen*sizeof(int)); |
569 |
+ |
if (newmap == NULL) |
570 |
+ |
error(SYSTEM, "out of memory in setalphas"); |
571 |
+ |
while (nvals--) { /* add new values to end */ |
572 |
+ |
rV.alpha[vbeg] = 255; |
573 |
+ |
newmap[vmaplen+nvals] = vbeg++; |
574 |
+ |
} |
575 |
+ |
if (nvals >= 3*vmaplen) { /* resort the combined array */ |
576 |
+ |
while (vmaplen--) |
577 |
+ |
newmap[vmaplen] = valmap[vmaplen]; |
578 |
+ |
qsort((char *)newmap, newmaplen, sizeof(int), valcmp); |
579 |
+ |
} else { /* perform merge sort */ |
580 |
+ |
qsort((char *)(newmap+vmaplen), newmaplen-vmaplen, |
581 |
+ |
sizeof(int), valcmp); |
582 |
+ |
mergalphas(newmap, valmap, vmaplen, |
583 |
+ |
newmap+vmaplen, newmaplen-vmaplen); |
584 |
+ |
} |
585 |
+ |
if (valmap != NULL) /* free old map and assign new one */ |
586 |
+ |
free((char *)valmap); |
587 |
+ |
valmap = newmap; |
588 |
+ |
vmaplen = newmaplen; |
589 |
+ |
lastalpha = 0; /* set new alpha values */ |
590 |
+ |
ccmp[0] = ccmp[1] = ccmp[2] = 256; |
591 |
+ |
while (newmaplen--) |
592 |
+ |
if (rV.rgb[*newmap][0] == ccmp[0] && |
593 |
+ |
rV.rgb[*newmap][1] == ccmp[1] && |
594 |
+ |
rV.rgb[*newmap][2] == ccmp[2]) { |
595 |
+ |
if (lastalpha >= 255) |
596 |
+ |
newmap++; |
597 |
+ |
else if (rV.alpha[*newmap] < 255) |
598 |
+ |
lastalpha = rV.alpha[*newmap++]; |
599 |
+ |
else |
600 |
+ |
rV.alpha[*newmap++] = ++lastalpha; |
601 |
+ |
} else { |
602 |
+ |
ccmp[0] = rV.rgb[*newmap][0]; |
603 |
+ |
ccmp[1] = rV.rgb[*newmap][1]; |
604 |
+ |
ccmp[2] = rV.rgb[*newmap][2]; |
605 |
+ |
if (rV.alpha[*newmap] < 255) |
606 |
+ |
lastalpha = rV.alpha[*newmap++]; |
607 |
+ |
else |
608 |
+ |
rV.alpha[*newmap++] = lastalpha = 1; |
609 |
+ |
} |
610 |
+ |
} |
611 |
+ |
|
612 |
+ |
|
613 |
+ |
static |
614 |
|
TMapValues(redo) /* map our values to RGB */ |
615 |
|
int redo; |
616 |
|
{ |
639 |
|
tmAddHisto(rV.brt+borg, blen, 1); |
640 |
|
if (tmComputeMapping(0., 0., 0.) != TM_E_OK) |
641 |
|
return(0); |
642 |
< |
rV.drl = rV.bl; |
642 |
> |
clralphas(); /* restart value list */ |
643 |
> |
rV.drl = rV.bl; /* need to redraw */ |
644 |
|
} |
645 |
|
if (tmMapPixels(rV.rgb+aorg, rV.brt+aorg, |
646 |
|
rV.chr+aorg, alen) != TM_E_OK) |
648 |
|
if (blen > 0) |
649 |
|
tmMapPixels(rV.rgb+borg, rV.brt+borg, |
650 |
|
rV.chr+borg, blen); |
651 |
< |
/* compute unique alpha values */ |
652 |
< |
rV.tml = rV.tl; |
651 |
> |
setalphas(aorg, alen); /* compute add'l alpha values */ |
652 |
> |
if (blen > 0) |
653 |
> |
setalphas(borg, blen); |
654 |
> |
rV.tml = rV.tl; /* we're all up to date */ |
655 |
|
return(1); |
656 |
|
} |
657 |
|
|
668 |
|
nclear -= rV.nl - nused; |
669 |
|
if (nclear <= 0) |
670 |
|
return(0); |
671 |
< |
if (nclear >= nused) { /* clear them all */ |
671 |
> |
if (nclear >= nused) { /* clear them all? */ |
672 |
|
rV.drl = rV.tml = rV.bl = rV.tl = 0; |
673 |
|
return(nused); |
674 |
|
} |
724 |
|
static |
725 |
|
draw_grids() /* draw holodeck section grids */ |
726 |
|
{ |
727 |
< |
static GLubyte gridrgba[4] = {0x0, 0xff, 0xff, 0x00}; |
727 |
> |
static BYTE gridrgba[4] = {0x0, 0xff, 0xff, 0x00}; |
728 |
|
|
729 |
|
if (!mapped) |
730 |
|
return; |
737 |
|
|
738 |
|
|
739 |
|
static int |
740 |
+ |
IndexValue(rgba) /* locate a pixel by it's framebuffer value */ |
741 |
+ |
register BYTE rgba[4]; |
742 |
+ |
{ |
743 |
+ |
register int *vp; |
744 |
+ |
/* check legality */ |
745 |
+ |
if (rgba[3] == 0 || rgba[3] == 255) |
746 |
+ |
return(-1); |
747 |
+ |
/* borrow a value slot */ |
748 |
+ |
rV.rgb[rV.tl][0] = rgba[0]; |
749 |
+ |
rV.rgb[rV.tl][1] = rgba[1]; |
750 |
+ |
rV.rgb[rV.tl][2] = rgba[2]; |
751 |
+ |
rV.alpha[rV.tl] = rgba[3]; |
752 |
+ |
/* find it */ |
753 |
+ |
vp = (int *)bsearch((char *)&rV.tl, (char *)valmap, vmaplen, |
754 |
+ |
sizeof(int), valcmp); |
755 |
+ |
if (vp == NULL) |
756 |
+ |
return(-1); |
757 |
+ |
return(*vp); |
758 |
+ |
} |
759 |
+ |
|
760 |
+ |
|
761 |
+ |
static int |
762 |
|
FindValue(dx, dy) /* find a value on the display */ |
763 |
|
int dx, dy; |
764 |
|
{ |
765 |
< |
return(-1); /* not found */ |
765 |
> |
BYTE rgba[4]; |
766 |
> |
|
767 |
> |
if (dx < 0 || dy < 0 || dx >= odev.hres || dy >= odev.vres) |
768 |
> |
return(-1); |
769 |
> |
glReadPixels(dx, dy, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, rgba); |
770 |
> |
return(IndexValue(rgba)); |
771 |
|
} |
772 |
|
|
773 |
|
|
829 |
|
int rootx, rooty, wx, wy; |
830 |
|
unsigned int statemask; |
831 |
|
|
832 |
+ |
quicken = 1; /* accelerate update rate */ |
833 |
|
XNoOp(ourdisplay); |
834 |
|
|
835 |
|
while (!XCheckMaskEvent(ourdisplay, |
851 |
|
wx = levptr(XButtonReleasedEvent)->x; |
852 |
|
wy = levptr(XButtonReleasedEvent)->y; |
853 |
|
moveview(wx, odev.vres-1-wy, movdir, movorb); |
854 |
+ |
} else { |
855 |
+ |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
856 |
+ |
redraw(); |
857 |
|
} |
858 |
+ |
quicken = 0; |
859 |
|
dev_flush(); |
860 |
|
} |
861 |
|
|
892 |
|
return; |
893 |
|
case CTRL('R'): /* redraw screen */ |
894 |
|
TMapValues(1); |
895 |
+ |
glClear(GL_DEPTH_BUFFER_BIT); |
896 |
|
redraw(); |
897 |
|
return; |
898 |
|
case CTRL('L'): /* refresh from server */ |
899 |
|
if (inpresflags & DFL(DC_REDRAW)) |
900 |
|
return; |
901 |
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
748 |
– |
glDrawBuffer(GL_FRONT); |
902 |
|
glDisable(GL_DEPTH_TEST); |
903 |
|
draw_grids(); |
904 |
|
glEnable(GL_DEPTH_TEST); |
752 |
– |
glDrawBuffer(GL_FRONT_AND_BACK); |
905 |
|
glFlush(); |
906 |
|
Compost(100); /* get rid of old values */ |
907 |
|
inpresflags |= DFL(DC_REDRAW); /* resend values from server */ |
929 |
|
fixwindow(eexp) /* repair damage to window */ |
930 |
|
register XExposeEvent *eexp; |
931 |
|
{ |
932 |
< |
if (odev.hres == 0 || odev.vres == 0) { /* first exposure */ |
933 |
< |
odev.hres = eexp->width; |
782 |
< |
odev.vres = eexp->height; |
783 |
< |
} |
932 |
> |
if (odev.hres == 0 || odev.vres == 0) /* first exposure */ |
933 |
> |
resizewindow((XConfigureEvent *)eexp); |
934 |
|
if (eexp->width == odev.hres && eexp->height == odev.vres) |
935 |
|
TMapValues(1); |
936 |
< |
if (!eexp->count) |
936 |
> |
if (!eexp->count) { |
937 |
> |
glClear(GL_DEPTH_BUFFER_BIT); |
938 |
|
redraw(); |
939 |
+ |
} |
940 |
|
} |
941 |
|
|
942 |
|
|