src/rt/rview.c

#ifndef lint
static const char       RCSid[] = "$Id: rview.c,v 2.31 2008/09/05 19:45:42 greg Exp $";
#endif
/*
 *  rview.c - routines and variables for interactive view generation.
 *
 *  External symbols declared in rpaint.h
 */

#include "copyright.h"

#include  <signal.h>
#include  <ctype.h>

#include  "ray.h"
#include  "rpaint.h"

#define  CTRL(c)        ((c)-'@')


void
quit(code)                      /* quit program */
int  code;
{
#ifdef MSTATS
        if (code == 2 && errno == ENOMEM)
                printmemstats(stderr);
#endif
        if (ray_pnprocs > 0)    /* close children if any */
                ray_pclose(0);          
        devclose();
        exit(code);
}


void
devopen(                                /* open device driver */
        char  *dname
)
{
        extern char  *progname, *octname;
        char  *id;
        int  i;

        id = octname!=NULL ? octname : progname;
                                                /* check device table */
        for (i = 0; devtable[i].name; i++)
                if (!strcmp(dname, devtable[i].name)) {
                        if ((dev = (*devtable[i].init)(dname, id)) == NULL) {
                                sprintf(errmsg, "cannot initialize %s", dname);
                                error(USER, errmsg);
                        } else
                                return;
                }
                                                /* not there, try exec */
        if ((dev = comm_init(dname, id)) == NULL) {
                sprintf(errmsg, "cannot start device \"%s\"", dname);
                error(USER, errmsg);
        }
}


void
devclose(void)                          /* close our device */
{
        if (dev != NULL)
                (*dev->close)();
        dev = NULL;
}


void
printdevices(void)                      /* print list of output devices */
{
        int  i;

        for (i = 0; devtable[i].name; i++)
                printf("%-16s # %s\n", devtable[i].name, devtable[i].descrip);
}


void
rview(void)                             /* do a view */
{
        char  buf[32];

        devopen(dvcname);               /* open device */
        newimage(NULL);                 /* start image */

        for ( ; ; ) {                   /* quit in command() */
                while (hresolu <= 1<<pdepth && vresolu <= 1<<pdepth)
                        command("done: ");
                errno = 0;
                if (hresolu <= psample<<pdepth && vresolu <= psample<<pdepth) {
                        sprintf(buf, "%d sampling...\n", 1<<pdepth);
                        (*dev->comout)(buf);
                        rsample();
                } else {
                        sprintf(buf, "%d refining...\n", 1<<pdepth);
                        (*dev->comout)(buf);
                        refine(&ptrunk, pdepth+1);
                }
                if (dev->inpready)              /* noticed some input */
                        command(": ");
                else                            /* finished this depth */
                        pdepth++;
        }
}


void
command(                        /* get/execute command */
        char  *prompt
)
{
#define  badcom(s)      strncmp(s, inpbuf, args-inpbuf-1)
        char  inpbuf[256];
        char  *args;
again:
        (*dev->comin)(inpbuf, prompt);          /* get command + arguments */
        for (args = inpbuf; *args && *args != ' '; args++)
                ;
        if (*args) *args++ = '\0';
        else *++args = '\0';

        if (waitrays() < 0)                     /* clear ray queue */
                quit(1);
        
        switch (inpbuf[0]) {
        case 'f':                               /* new frame (|focus|free) */
                if (badcom("frame")) {
                        if (badcom("focus")) {
                                if (badcom("free"))
                                        goto commerr;
                                free_objmem();
                                break;
                        }
                        getfocus(args);
                        break;
                }
                getframe(args);
                break;
        case 'v':                               /* view */
                if (badcom("view"))
                        goto commerr;
                getview(args);
                break;
        case 'l':                               /* last view */
                if (badcom("last"))
                        goto commerr;
                lastview(args);
                break;
        case 'V':                               /* save view */
                if (badcom("V"))
                        goto commerr;
                saveview(args);
                break;
        case 'L':                               /* load view */
                if (badcom("L"))
                        goto commerr;
                loadview(args);
                break;
        case 'e':                               /* exposure */
                if (badcom("exposure"))
                        goto commerr;
                getexposure(args);
                break;
        case 's':                               /* set a parameter */
                if (badcom("set")) {
#ifdef  SIGTSTP
                        if (!badcom("stop"))
                                goto dostop;
#endif
                        goto commerr;
                }
                setparam(args);
                break;
        case 'n':                               /* new picture */
                if (badcom("new"))
                        goto commerr;
                newimage(args);
                break;
        case 't':                               /* trace a ray */
                if (badcom("trace"))
                        goto commerr;
                traceray(args);
                break;
        case 'a':                               /* aim camera */
                if (badcom("aim"))
                        goto commerr;
                getaim(args);
                break;
        case 'm':                               /* move camera (or memstats) */
                if (badcom("move"))
#ifdef  MSTATS
                {
                        if (badcom("memory"))
                                goto commerr;
                        printmemstats(stderr);
                        break;
                }
#else
                        goto commerr;
#endif
                getmove(args);
                break;
        case 'r':                               /* rotate/repaint */
                if (badcom("rotate")) {
                        if (badcom("repaint")) {
                                if (badcom("redraw"))
                                        goto commerr;
                                redraw();
                                break;
                        }
                        getrepaint(args);
                        break;
                }
                getrotate(args);
                break;
        case 'p':                               /* pivot view */
                if (badcom("pivot")) {
                        if (badcom("pause"))
                                goto commerr;
                        goto again;
                }
                getpivot(args);
                break;
        case CTRL('R'):                         /* redraw */
                redraw();
                break;
        case 'w':                               /* write */
                if (badcom("write"))
                        goto commerr;
                writepict(args);
                break;
        case 'q':                               /* quit */
                if (badcom("quit"))
                        goto commerr;
                quit(0);
        case CTRL('C'):                         /* interrupt */
                goto again;
#ifdef  SIGTSTP
        case CTRL('Z'):;                        /* stop */
dostop:
                devclose();
                kill(0, SIGTSTP);
                /* pc stops here */
                devopen(dvcname);
                redraw();
                break;
#endif
        case '\0':                              /* continue */
                break;
        default:;
commerr:
                if (iscntrl(inpbuf[0]))
                        sprintf(errmsg, "^%c: unknown control",
                                        inpbuf[0]|0100);
                else
                        sprintf(errmsg, "%s: unknown command", inpbuf);
                error(COMMAND, errmsg);
                break;
        }
#undef  badcom
}


void
rsample(void)                   /* sample the image */
{
        int  xsiz, ysiz, y;
        PNODE  *p;
        PNODE   **pl;
        int  x;
        /*
         *     We initialize the bottom row in the image at our current
         * resolution.  During sampling, we check super-pixels to the
         * right and above by calling bigdiff().  If there is a significant
         * difference, we subsample the super-pixels.  The testing process
         * includes initialization of the next row.
         */
        xsiz = (((long)(pframe.r-pframe.l)<<pdepth)+hresolu-1) / hresolu;
        ysiz = (((long)(pframe.u-pframe.d)<<pdepth)+vresolu-1) / vresolu;
        pl = (PNODE **)malloc(xsiz*sizeof(PNODE *));
        if (pl == NULL)
                return;
        /*
         * Initialize the bottom row.
         */
        pl[0] = findrect(pframe.l, pframe.d, &ptrunk, pdepth);
        for (x = 1; x < xsiz; x++) {
                pl[x] = findrect(pframe.l+((x*hresolu)>>pdepth),
                                pframe.d, &ptrunk, pdepth);
        }
                                                /* sample the image */
        for (y = 0; /* y < ysiz */ ; y++) {
                for (x = 0; x < xsiz-1; x++) {
                        if (dev->inpready || errno == ENOMEM)
                                goto escape;
                        /*
                         * Test super-pixel to the right.
                         */
                        if (pl[x] != pl[x+1] && bigdiff(pl[x]->v,
                                        pl[x+1]->v, maxdiff)) {
                                refine(pl[x], 1);
                                refine(pl[x+1], 1);
                        }
                }
                if (y >= ysiz-1)
                        break;
                for (x = 0; x < xsiz; x++) {
                        if (dev->inpready || errno == ENOMEM)
                                goto escape;
                        /*
                         * Find super-pixel at this position in next row.
                         */
                        p = findrect(pframe.l+((x*hresolu)>>pdepth),
                                pframe.d+(((y+1)*vresolu)>>pdepth),
                                        &ptrunk, pdepth);
                        /*
                         * Test super-pixel in next row.
                         */
                        if (pl[x] != p && bigdiff(pl[x]->v, p->v, maxdiff)) {
                                refine(pl[x], 1);
                                refine(p, 1);
                        }
                        /*
                         * Copy into super-pixel array.
                         */
                        pl[x] = p;
                }
        }
escape:
        free((void *)pl);
}


int
refine(                         /* refine a node */
        PNODE   *p,
        int  pd
)
{
        int  growth;
        int  mx, my;
        int  i;

        if (dev->inpready)                      /* quit for input */
                return(0);

        if (pd <= 0)                            /* depth limit */
                return(0);

        mx = (p->xmin + p->xmax) >> 1;
        my = (p->ymin + p->ymax) >> 1;
        growth = 0;

        if (p->kid == NULL) {                   /* subdivide */

                if ((p->kid = newptree()) == NULL)
                        return(0);

                p->kid[UR].xmin = mx;
                p->kid[UR].ymin = my;
                p->kid[UR].xmax = p->xmax;
                p->kid[UR].ymax = p->ymax;
                p->kid[UL].xmin = p->xmin;
                p->kid[UL].ymin = my;
                p->kid[UL].xmax = mx;
                p->kid[UL].ymax = p->ymax;
                p->kid[DR].xmin = mx;
                p->kid[DR].ymin = p->ymin;
                p->kid[DR].xmax = p->xmax;
                p->kid[DR].ymax = my;
                p->kid[DL].xmin = p->xmin;
                p->kid[DL].ymin = p->ymin;
                p->kid[DL].xmax = mx;
                p->kid[DL].ymax = my;
                /*
                 *  The following paint order can leave a black pixel
                 *  if redraw() is called in (*dev->paintr)().
                 */
                if (p->x >= mx && p->y >= my)
                        pcopy(p, p->kid+UR);
                else if (paint(p->kid+UR) < 0)
                        quit(1);
                if (p->x < mx && p->y >= my)
                        pcopy(p, p->kid+UL);
                else if (paint(p->kid+UL) < 0)
                        quit(1);
                if (p->x >= mx && p->y < my)
                        pcopy(p, p->kid+DR);
                else if (paint(p->kid+DR) < 0)
                        quit(1);
                if (p->x < mx && p->y < my)
                        pcopy(p, p->kid+DL);
                else if (paint(p->kid+DL) < 0)
                        quit(1);

                growth++;
        }
                                                /* do children */
        if (mx > pframe.l) {
                if (my > pframe.d)
                        growth += refine(p->kid+DL, pd-1);
                if (my < pframe.u)
                        growth += refine(p->kid+UL, pd-1);
        }
        if (mx < pframe.r) {
                if (my > pframe.d)
                        growth += refine(p->kid+DR, pd-1);
                if (my < pframe.u)
                        growth += refine(p->kid+UR, pd-1);
        }
        return(growth);
}
Revision:	2.32
Committed:	Sat Dec 12 19:01:00 2009 UTC (14 years, 4 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.31:	+16 -1 lines
Log Message:	Added -n option to rtrace and moved quit() funciton out of raypcalls
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.32	static const char RCSid[] = "$Id: rview.c,v 2.31 2008/09/05 19:45:42 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* rview.c - routines and variables for interactive view generation.
6			*
7	greg	2.18	* External symbols declared in rpaint.h
8			*/
9
10	greg	2.19	#include "copyright.h"
11	greg	1.1
12	schorsch	2.20	#include <signal.h>
13			#include <ctype.h>
14
15	greg	1.15	#include "ray.h"
16	greg	1.1	#include "rpaint.h"
17
18	greg	2.8	#define CTRL(c) ((c)-'@')
19	greg	1.1
20
21	greg	2.18	void
22	greg	2.32	quit(code) /* quit program */
23			int code;
24			{
25			#ifdef MSTATS
26			if (code == 2 && errno == ENOMEM)
27			printmemstats(stderr);
28			#endif
29			if (ray_pnprocs > 0) /* close children if any */
30			ray_pclose(0);
31			devclose();
32			exit(code);
33			}
34
35
36			void
37	greg	2.29	devopen( /* open device driver */
38			char *dname
39			)
40	greg	1.1	{
41	greg	1.6	extern char progname, octname;
42	greg	1.7	char *id;
43	greg	2.29	int i;
44	greg	1.6
45	greg	1.7	id = octname!=NULL ? octname : progname;
46	greg	1.1	/* check device table */
47			for (i = 0; devtable[i].name; i++)
48	schorsch	2.23	if (!strcmp(dname, devtable[i].name)) {
49	greg	1.7	if ((dev = (*devtable[i].init)(dname, id)) == NULL) {
50	greg	1.1	sprintf(errmsg, "cannot initialize %s", dname);
51			error(USER, errmsg);
52			} else
53			return;
54	schorsch	2.23	}
55	greg	1.1	/* not there, try exec */
56	greg	1.7	if ((dev = comm_init(dname, id)) == NULL) {
57	greg	1.1	sprintf(errmsg, "cannot start device \"%s\"", dname);
58			error(USER, errmsg);
59			}
60			}
61
62
63	greg	2.18	void
64	greg	2.29	devclose(void) /* close our device */
65	greg	1.1	{
66			if (dev != NULL)
67			(*dev->close)();
68			dev = NULL;
69			}
70
71
72	greg	2.18	void
73	greg	2.29	printdevices(void) /* print list of output devices */
74	greg	1.1	{
75	greg	2.29	int i;
76	greg	1.1
77			for (i = 0; devtable[i].name; i++)
78			printf("%-16s # %s\n", devtable[i].name, devtable[i].descrip);
79			}
80
81
82	greg	2.18	void
83	greg	2.29	rview(void) /* do a view */
84	greg	1.1	{
85			char buf[32];
86
87	greg	2.18	devopen(dvcname); /* open device */
88	greg	2.29	newimage(NULL); /* start image */
89	greg	1.14
90	greg	1.1	for ( ; ; ) { /* quit in command() */
91	greg	1.14	while (hresolu <= 1<<pdepth && vresolu <= 1<<pdepth)
92	greg	1.1	command("done: ");
93	greg	1.14	errno = 0;
94			if (hresolu <= psample<<pdepth && vresolu <= psample<<pdepth) {
95	greg	1.1	sprintf(buf, "%d sampling...\n", 1<<pdepth);
96			(*dev->comout)(buf);
97			rsample();
98			} else {
99			sprintf(buf, "%d refining...\n", 1<<pdepth);
100			(*dev->comout)(buf);
101	greg	2.29	refine(&ptrunk, pdepth+1);
102	greg	1.1	}
103	greg	2.29	if (dev->inpready) /* noticed some input */
104	greg	1.1	command(": ");
105	greg	1.14	else /* finished this depth */
106	greg	1.1	pdepth++;
107			}
108			}
109
110
111	greg	2.18	void
112	greg	2.29	command( /* get/execute command */
113			char *prompt
114			)
115	greg	1.1	{
116	greg	2.8	#define badcom(s) strncmp(s, inpbuf, args-inpbuf-1)
117	greg	1.1	char inpbuf[256];
118			char *args;
119			again:
120	greg	1.10	(dev->comin)(inpbuf, prompt); / get command + arguments */
121	greg	1.1	for (args = inpbuf; args && args != ' '; args++)
122			;
123			if (args) args++ = '\0';
124			else *++args = '\0';
125	greg	2.30
126			if (waitrays() < 0) /* clear ray queue */
127			quit(1);
128	greg	1.1
129			switch (inpbuf[0]) {
130	greg	2.27	case 'f': /* new frame (\|focus\|free) */
131	greg	2.10	if (badcom("frame")) {
132	greg	2.27	if (badcom("focus")) {
133			if (badcom("free"))
134			goto commerr;
135			free_objmem();
136			break;
137			}
138			getfocus(args);
139	greg	2.10	break;
140			}
141	greg	1.1	getframe(args);
142			break;
143			case 'v': /* view */
144			if (badcom("view"))
145			goto commerr;
146			getview(args);
147			break;
148			case 'l': /* last view */
149			if (badcom("last"))
150			goto commerr;
151			lastview(args);
152	greg	2.11	break;
153			case 'V': /* save view */
154			if (badcom("V"))
155			goto commerr;
156			saveview(args);
157			break;
158			case 'L': /* load view */
159			if (badcom("L"))
160			goto commerr;
161			loadview(args);
162	greg	1.1	break;
163			case 'e': /* exposure */
164			if (badcom("exposure"))
165			goto commerr;
166			getexposure(args);
167			break;
168			case 's': /* set a parameter */
169	greg	2.13	if (badcom("set")) {
170			#ifdef SIGTSTP
171			if (!badcom("stop"))
172			goto dostop;
173			#endif
174	greg	1.1	goto commerr;
175	greg	2.13	}
176	greg	1.1	setparam(args);
177			break;
178			case 'n': /* new picture */
179			if (badcom("new"))
180			goto commerr;
181	greg	2.29	newimage(args);
182	greg	1.1	break;
183			case 't': /* trace a ray */
184			if (badcom("trace"))
185			goto commerr;
186			traceray(args);
187			break;
188			case 'a': /* aim camera */
189			if (badcom("aim"))
190			goto commerr;
191			getaim(args);
192			break;
193	greg	2.10	case 'm': /* move camera (or memstats) */
194	greg	1.1	if (badcom("move"))
195	greg	2.8	#ifdef MSTATS
196	greg	2.2	{
197			if (badcom("memory"))
198			goto commerr;
199			printmemstats(stderr);
200			break;
201			}
202			#else
203	greg	1.1	goto commerr;
204	greg	2.2	#endif
205	greg	1.1	getmove(args);
206			break;
207	greg	1.8	case 'r': /* rotate/repaint */
208			if (badcom("rotate")) {
209	greg	2.13	if (badcom("repaint")) {
210			if (badcom("redraw"))
211			goto commerr;
212			redraw();
213			break;
214			}
215	greg	1.8	getrepaint(args);
216			break;
217			}
218	greg	1.1	getrotate(args);
219			break;
220			case 'p': /* pivot view */
221	greg	2.13	if (badcom("pivot")) {
222			if (badcom("pause"))
223			goto commerr;
224			goto again;
225			}
226	greg	1.1	getpivot(args);
227			break;
228	greg	2.4	case CTRL('R'): /* redraw */
229	greg	1.1	redraw();
230			break;
231			case 'w': /* write */
232			if (badcom("write"))
233			goto commerr;
234			writepict(args);
235			break;
236			case 'q': /* quit */
237			if (badcom("quit"))
238			goto commerr;
239			quit(0);
240	greg	2.4	case CTRL('C'): /* interrupt */
241	greg	1.1	goto again;
242	greg	2.8	#ifdef SIGTSTP
243	greg	2.13	case CTRL('Z'):; /* stop */
244			dostop:
245	greg	1.1	devclose();
246			kill(0, SIGTSTP);
247			/* pc stops here */
248	greg	2.18	devopen(dvcname);
249	greg	1.1	redraw();
250			break;
251			#endif
252			case '\0': /* continue */
253			break;
254			default:;
255			commerr:
256			if (iscntrl(inpbuf[0]))
257			sprintf(errmsg, "^%c: unknown control",
258			inpbuf[0]\|0100);
259			else
260			sprintf(errmsg, "%s: unknown command", inpbuf);
261			error(COMMAND, errmsg);
262			break;
263			}
264	greg	2.8	#undef badcom
265	greg	1.1	}
266
267
268	greg	2.18	void
269	greg	2.29	rsample(void) /* sample the image */
270	greg	1.1	{
271			int xsiz, ysiz, y;
272			PNODE *p;
273	greg	2.29	PNODE **pl;
274			int x;
275	greg	1.1	/*
276			* We initialize the bottom row in the image at our current
277	greg	2.8	* resolution. During sampling, we check super-pixels to the
278	greg	1.1	* right and above by calling bigdiff(). If there is a significant
279			* difference, we subsample the super-pixels. The testing process
280			* includes initialization of the next row.
281			*/
282	greg	2.12	xsiz = (((long)(pframe.r-pframe.l)<<pdepth)+hresolu-1) / hresolu;
283			ysiz = (((long)(pframe.u-pframe.d)<<pdepth)+vresolu-1) / vresolu;
284	greg	1.1	pl = (PNODE *)malloc(xsizsizeof(PNODE *));
285	greg	2.29	if (pl == NULL)
286	greg	1.14	return;
287	greg	1.1	/*
288			* Initialize the bottom row.
289			*/
290	greg	2.29	pl[0] = findrect(pframe.l, pframe.d, &ptrunk, pdepth);
291	greg	1.1	for (x = 1; x < xsiz; x++) {
292	greg	1.9	pl[x] = findrect(pframe.l+((x*hresolu)>>pdepth),
293	greg	2.29	pframe.d, &ptrunk, pdepth);
294	greg	1.1	}
295			/* sample the image */
296			for (y = 0; /* y < ysiz */ ; y++) {
297			for (x = 0; x < xsiz-1; x++) {
298	greg	1.20	if (dev->inpready \|\| errno == ENOMEM)
299	greg	1.1	goto escape;
300			/*
301			* Test super-pixel to the right.
302			*/
303			if (pl[x] != pl[x+1] && bigdiff(pl[x]->v,
304			pl[x+1]->v, maxdiff)) {
305	greg	2.29	refine(pl[x], 1);
306			refine(pl[x+1], 1);
307	greg	1.1	}
308			}
309			if (y >= ysiz-1)
310			break;
311			for (x = 0; x < xsiz; x++) {
312	greg	1.20	if (dev->inpready \|\| errno == ENOMEM)
313	greg	1.1	goto escape;
314			/*
315			* Find super-pixel at this position in next row.
316			*/
317	greg	1.9	p = findrect(pframe.l+((x*hresolu)>>pdepth),
318			pframe.d+(((y+1)*vresolu)>>pdepth),
319	greg	2.29	&ptrunk, pdepth);
320	greg	1.1	/*
321			* Test super-pixel in next row.
322			*/
323			if (pl[x] != p && bigdiff(pl[x]->v, p->v, maxdiff)) {
324	greg	2.29	refine(pl[x], 1);
325			refine(p, 1);
326	greg	1.1	}
327			/*
328			* Copy into super-pixel array.
329			*/
330			pl[x] = p;
331			}
332			}
333			escape:
334	greg	2.18	free((void *)pl);
335	greg	1.1	}
336
337
338			int
339	greg	2.29	refine( /* refine a node */
340			PNODE *p,
341			int pd
342			)
343	greg	1.1	{
344			int growth;
345			int mx, my;
346			int i;
347
348			if (dev->inpready) /* quit for input */
349			return(0);
350
351			if (pd <= 0) /* depth limit */
352			return(0);
353
354	greg	2.29	mx = (p->xmin + p->xmax) >> 1;
355			my = (p->ymin + p->ymax) >> 1;
356	greg	1.1	growth = 0;
357
358			if (p->kid == NULL) { /* subdivide */
359
360			if ((p->kid = newptree()) == NULL)
361	greg	1.20	return(0);
362	greg	2.29
363			p->kid[UR].xmin = mx;
364			p->kid[UR].ymin = my;
365			p->kid[UR].xmax = p->xmax;
366			p->kid[UR].ymax = p->ymax;
367			p->kid[UL].xmin = p->xmin;
368			p->kid[UL].ymin = my;
369			p->kid[UL].xmax = mx;
370			p->kid[UL].ymax = p->ymax;
371			p->kid[DR].xmin = mx;
372			p->kid[DR].ymin = p->ymin;
373			p->kid[DR].xmax = p->xmax;
374			p->kid[DR].ymax = my;
375			p->kid[DL].xmin = p->xmin;
376			p->kid[DL].ymin = p->ymin;
377			p->kid[DL].xmax = mx;
378			p->kid[DL].ymax = my;
379	greg	1.1	/*
380			* The following paint order can leave a black pixel
381	greg	2.7	* if redraw() is called in (*dev->paintr)().
382	greg	1.1	*/
383			if (p->x >= mx && p->y >= my)
384			pcopy(p, p->kid+UR);
385	greg	2.29	else if (paint(p->kid+UR) < 0)
386			quit(1);
387	greg	1.1	if (p->x < mx && p->y >= my)
388			pcopy(p, p->kid+UL);
389	greg	2.29	else if (paint(p->kid+UL) < 0)
390			quit(1);
391	greg	1.1	if (p->x >= mx && p->y < my)
392			pcopy(p, p->kid+DR);
393	greg	2.29	else if (paint(p->kid+DR) < 0)
394			quit(1);
395	greg	1.1	if (p->x < mx && p->y < my)
396			pcopy(p, p->kid+DL);
397	greg	2.29	else if (paint(p->kid+DL) < 0)
398			quit(1);
399	greg	1.1
400			growth++;
401			}
402			/* do children */
403			if (mx > pframe.l) {
404			if (my > pframe.d)
405	greg	2.29	growth += refine(p->kid+DL, pd-1);
406	greg	1.1	if (my < pframe.u)
407	greg	2.29	growth += refine(p->kid+UL, pd-1);
408	greg	1.1	}
409			if (mx < pframe.r) {
410			if (my > pframe.d)
411	greg	2.29	growth += refine(p->kid+DR, pd-1);
412	greg	1.1	if (my < pframe.u)
413	greg	2.29	growth += refine(p->kid+UR, pd-1);
414	greg	1.1	}
415			return(growth);
416			}