17 |
|
#define pscan(y) (ourpict+(y)*ourview.hresolu) |
18 |
|
#define zscan(y) (ourzbuf+(y)*ourview.hresolu) |
19 |
|
|
20 |
+ |
#define ABS(x) ((x)>0?(x):-(x)) |
21 |
+ |
|
22 |
|
VIEW ourview = STDVIEW(512); /* desired view */ |
23 |
|
|
24 |
|
double zeps = 0.001; /* allowed z epsilon */ |
252 |
|
|
253 |
|
fillpicture() /* fill in empty spaces */ |
254 |
|
{ |
255 |
+ |
int *yback, xback; |
256 |
|
int y; |
257 |
< |
COLR cfill; |
258 |
< |
register int x, xblank; |
259 |
< |
|
257 |
> |
COLR pfill; |
258 |
> |
register int x, i; |
259 |
> |
/* get back buffer */ |
260 |
> |
yback = (int *)malloc(ourview.hresolu*sizeof(int)); |
261 |
> |
if (yback == NULL) { |
262 |
> |
perror(progname); |
263 |
> |
return; |
264 |
> |
} |
265 |
> |
for (x = 0; x < ourview.hresolu; x++) |
266 |
> |
yback[x] = -2; |
267 |
> |
/* fill image */ |
268 |
|
for (y = 0; y < ourview.vresolu; y++) { |
269 |
< |
xblank = -1; |
269 |
> |
xback = -2; |
270 |
|
for (x = 0; x < ourview.hresolu; x++) |
271 |
< |
if (zscan(y)[x] <= 0.0) { |
272 |
< |
if (xblank < 0) |
273 |
< |
xblank = x; |
274 |
< |
} else if (xblank >= 0) { |
275 |
< |
if (xblank == 0 || zscan(y)[xblank-1] < zscan(y)[x]) |
276 |
< |
copycolr(cfill, pscan(y)[x]); |
271 |
> |
if (zscan(y)[x] <= 0.0) { /* empty pixel */ |
272 |
> |
if (yback[x] == -2) { |
273 |
> |
for (i = y+1; i < ourview.vresolu; i++) |
274 |
> |
if (zscan(i)[x] > 0.0) |
275 |
> |
break; |
276 |
> |
if (i < ourview.vresolu |
277 |
> |
&& (y <= 0 || zscan(y-1)[x] < zscan(i)[x])) |
278 |
> |
yback[x] = i; |
279 |
> |
else |
280 |
> |
yback[x] = y-1; |
281 |
> |
} |
282 |
> |
if (xback == -2) { |
283 |
> |
for (i = x+1; x < ourview.hresolu; i++) |
284 |
> |
if (zscan(y)[i] > 0.0) |
285 |
> |
break; |
286 |
> |
if (i < ourview.hresolu |
287 |
> |
&& (x <= 0 || zscan(y)[x-1] < zscan(y)[i])) |
288 |
> |
xback = i; |
289 |
> |
else |
290 |
> |
xback = x-1; |
291 |
> |
} |
292 |
> |
if (xback < 0 && yback[x] < 0) |
293 |
> |
continue; |
294 |
> |
if (yback[x] < 0 || ABS(x-xback) <= 1 |
295 |
> |
|| ( ABS(y-yback[x]) > 1 |
296 |
> |
&& zscan(yback[x])[x] < zscan(y)[xback] )) |
297 |
> |
copycolr(pscan(y)[x],pscan(y)[xback]); |
298 |
|
else |
299 |
< |
copycolr(cfill, pscan(y)[xblank-1]); |
300 |
< |
for ( ; xblank < x; xblank++) |
301 |
< |
copycolr(pscan(y)[xblank], cfill); |
302 |
< |
xblank = -1; |
299 |
> |
copycolr(pscan(y)[x],pscan(yback[x])[x]); |
300 |
> |
} else { /* full pixel */ |
301 |
> |
yback[x] = -2; |
302 |
> |
xback = -2; |
303 |
|
} |
272 |
– |
if (xblank > 0) { |
273 |
– |
copycolr(cfill, pscan(y)[xblank-1]); |
274 |
– |
for ( ; xblank < ourview.hresolu; xblank++) |
275 |
– |
copycolr(pscan(y)[xblank], cfill); |
276 |
– |
} |
304 |
|
} |
305 |
+ |
free((char *)yback); |
306 |
|
} |
307 |
|
|
308 |
|
|