src/rt/rview.c

#ifndef lint
static const char       RCSid[] = "$Id: rview.c,v 2.36 2012/03/20 03:37:08 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;
{
        if (ray_pnprocs > 0)    /* close children if any */
                ray_pclose(0);
        if (!ray_pnprocs)       /* in parent */
                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"))
                        goto commerr;
                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 'o':                               /* origin view */
                if (badcom("origin"))
                        goto commerr;
                getorigin(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;
        }
        if (newparam && ray_pnprocs)            /* drop into immediate mode */
                ray_pclose(0);
#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)
                                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)
                                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;

        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:	2.37
Committed:	Fri Oct 18 17:04:13 2013 UTC (12 years ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R4, rad5R2, rad5R3, rad5R0, rad5R1, rad4R2, rad4R2P1, rad4R2P2
Changes since 2.36:	+6 -1 lines
Log Message:	Added rvu "origin" command requested by John M.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.37	static const char RCSid[] = "$Id: rview.c,v 2.36 2012/03/20 03:37:08 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			if (ray_pnprocs > 0) /* close children if any */
26	greg	2.33	ray_pclose(0);
27	greg	2.36	if (!ray_pnprocs) /* in parent */
28	greg	2.33	devclose();
29	greg	2.32	exit(code);
30			}
31
32
33			void
34	greg	2.29	devopen( /* open device driver */
35			char *dname
36			)
37	greg	1.1	{
38	greg	1.6	extern char progname, octname;
39	greg	1.7	char *id;
40	greg	2.29	int i;
41	greg	1.6
42	greg	1.7	id = octname!=NULL ? octname : progname;
43	greg	1.1	/* check device table */
44			for (i = 0; devtable[i].name; i++)
45	schorsch	2.23	if (!strcmp(dname, devtable[i].name)) {
46	greg	1.7	if ((dev = (*devtable[i].init)(dname, id)) == NULL) {
47	greg	1.1	sprintf(errmsg, "cannot initialize %s", dname);
48			error(USER, errmsg);
49			} else
50			return;
51	schorsch	2.23	}
52	greg	1.1	/* not there, try exec */
53	greg	1.7	if ((dev = comm_init(dname, id)) == NULL) {
54	greg	1.1	sprintf(errmsg, "cannot start device \"%s\"", dname);
55			error(USER, errmsg);
56			}
57			}
58
59
60	greg	2.18	void
61	greg	2.29	devclose(void) /* close our device */
62	greg	1.1	{
63			if (dev != NULL)
64			(*dev->close)();
65			dev = NULL;
66			}
67
68
69	greg	2.18	void
70	greg	2.29	printdevices(void) /* print list of output devices */
71	greg	1.1	{
72	greg	2.29	int i;
73	greg	1.1
74			for (i = 0; devtable[i].name; i++)
75			printf("%-16s # %s\n", devtable[i].name, devtable[i].descrip);
76			}
77
78
79	greg	2.18	void
80	greg	2.29	rview(void) /* do a view */
81	greg	1.1	{
82			char buf[32];
83
84	greg	2.18	devopen(dvcname); /* open device */
85	greg	2.29	newimage(NULL); /* start image */
86	greg	1.14
87	greg	1.1	for ( ; ; ) { /* quit in command() */
88	greg	1.14	while (hresolu <= 1<<pdepth && vresolu <= 1<<pdepth)
89	greg	1.1	command("done: ");
90	greg	1.14	errno = 0;
91			if (hresolu <= psample<<pdepth && vresolu <= psample<<pdepth) {
92	greg	1.1	sprintf(buf, "%d sampling...\n", 1<<pdepth);
93			(*dev->comout)(buf);
94			rsample();
95			} else {
96			sprintf(buf, "%d refining...\n", 1<<pdepth);
97			(*dev->comout)(buf);
98	greg	2.29	refine(&ptrunk, pdepth+1);
99	greg	1.1	}
100	greg	2.29	if (dev->inpready) /* noticed some input */
101	greg	1.1	command(": ");
102	greg	1.14	else /* finished this depth */
103	greg	1.1	pdepth++;
104			}
105			}
106
107
108	greg	2.18	void
109	greg	2.29	command( /* get/execute command */
110			char *prompt
111			)
112	greg	1.1	{
113	greg	2.8	#define badcom(s) strncmp(s, inpbuf, args-inpbuf-1)
114	greg	1.1	char inpbuf[256];
115			char *args;
116			again:
117	greg	1.10	(dev->comin)(inpbuf, prompt); / get command + arguments */
118	greg	1.1	for (args = inpbuf; args && args != ' '; args++)
119			;
120			if (args) args++ = '\0';
121			else *++args = '\0';
122	greg	2.30
123			if (waitrays() < 0) /* clear ray queue */
124			quit(1);
125	greg	1.1
126			switch (inpbuf[0]) {
127	greg	2.27	case 'f': /* new frame (\|focus\|free) */
128	greg	2.10	if (badcom("frame")) {
129	greg	2.27	if (badcom("focus")) {
130			if (badcom("free"))
131			goto commerr;
132			free_objmem();
133			break;
134			}
135			getfocus(args);
136	greg	2.10	break;
137			}
138	greg	1.1	getframe(args);
139			break;
140			case 'v': /* view */
141			if (badcom("view"))
142			goto commerr;
143			getview(args);
144			break;
145			case 'l': /* last view */
146			if (badcom("last"))
147			goto commerr;
148			lastview(args);
149	greg	2.11	break;
150			case 'V': /* save view */
151			if (badcom("V"))
152			goto commerr;
153			saveview(args);
154			break;
155			case 'L': /* load view */
156			if (badcom("L"))
157			goto commerr;
158			loadview(args);
159	greg	1.1	break;
160			case 'e': /* exposure */
161			if (badcom("exposure"))
162			goto commerr;
163			getexposure(args);
164			break;
165			case 's': /* set a parameter */
166	greg	2.13	if (badcom("set")) {
167			#ifdef SIGTSTP
168			if (!badcom("stop"))
169			goto dostop;
170			#endif
171	greg	1.1	goto commerr;
172	greg	2.13	}
173	greg	1.1	setparam(args);
174			break;
175			case 'n': /* new picture */
176			if (badcom("new"))
177			goto commerr;
178	greg	2.29	newimage(args);
179	greg	1.1	break;
180			case 't': /* trace a ray */
181			if (badcom("trace"))
182			goto commerr;
183			traceray(args);
184			break;
185			case 'a': /* aim camera */
186			if (badcom("aim"))
187			goto commerr;
188			getaim(args);
189			break;
190	greg	2.10	case 'm': /* move camera (or memstats) */
191	greg	1.1	if (badcom("move"))
192			goto commerr;
193			getmove(args);
194			break;
195	greg	1.8	case 'r': /* rotate/repaint */
196			if (badcom("rotate")) {
197	greg	2.13	if (badcom("repaint")) {
198			if (badcom("redraw"))
199			goto commerr;
200			redraw();
201			break;
202			}
203	greg	1.8	getrepaint(args);
204			break;
205			}
206	greg	1.1	getrotate(args);
207			break;
208			case 'p': /* pivot view */
209	greg	2.13	if (badcom("pivot")) {
210			if (badcom("pause"))
211			goto commerr;
212			goto again;
213			}
214	greg	1.1	getpivot(args);
215			break;
216	greg	2.37	case 'o': /* origin view */
217			if (badcom("origin"))
218			goto commerr;
219			getorigin(args);
220			break;
221	greg	2.4	case CTRL('R'): /* redraw */
222	greg	1.1	redraw();
223			break;
224			case 'w': /* write */
225			if (badcom("write"))
226			goto commerr;
227			writepict(args);
228			break;
229			case 'q': /* quit */
230			if (badcom("quit"))
231			goto commerr;
232			quit(0);
233	greg	2.4	case CTRL('C'): /* interrupt */
234	greg	1.1	goto again;
235	greg	2.8	#ifdef SIGTSTP
236	greg	2.13	case CTRL('Z'):; /* stop */
237			dostop:
238	greg	1.1	devclose();
239			kill(0, SIGTSTP);
240			/* pc stops here */
241	greg	2.18	devopen(dvcname);
242	greg	1.1	redraw();
243			break;
244			#endif
245			case '\0': /* continue */
246			break;
247			default:;
248			commerr:
249			if (iscntrl(inpbuf[0]))
250			sprintf(errmsg, "^%c: unknown control",
251			inpbuf[0]\|0100);
252			else
253			sprintf(errmsg, "%s: unknown command", inpbuf);
254			error(COMMAND, errmsg);
255			break;
256			}
257	greg	2.36	if (newparam && ray_pnprocs) /* drop into immediate mode */
258			ray_pclose(0);
259	greg	2.8	#undef badcom
260	greg	1.1	}
261
262
263	greg	2.18	void
264	greg	2.29	rsample(void) /* sample the image */
265	greg	1.1	{
266			int xsiz, ysiz, y;
267			PNODE *p;
268	greg	2.29	PNODE **pl;
269			int x;
270	greg	1.1	/*
271			* We initialize the bottom row in the image at our current
272	greg	2.8	* resolution. During sampling, we check super-pixels to the
273	greg	1.1	* right and above by calling bigdiff(). If there is a significant
274			* difference, we subsample the super-pixels. The testing process
275			* includes initialization of the next row.
276			*/
277	greg	2.12	xsiz = (((long)(pframe.r-pframe.l)<<pdepth)+hresolu-1) / hresolu;
278			ysiz = (((long)(pframe.u-pframe.d)<<pdepth)+vresolu-1) / vresolu;
279	greg	1.1	pl = (PNODE *)malloc(xsizsizeof(PNODE *));
280	greg	2.29	if (pl == NULL)
281	greg	1.14	return;
282	greg	1.1	/*
283			* Initialize the bottom row.
284			*/
285	greg	2.29	pl[0] = findrect(pframe.l, pframe.d, &ptrunk, pdepth);
286	greg	1.1	for (x = 1; x < xsiz; x++) {
287	greg	1.9	pl[x] = findrect(pframe.l+((x*hresolu)>>pdepth),
288	greg	2.29	pframe.d, &ptrunk, pdepth);
289	greg	1.1	}
290			/* sample the image */
291			for (y = 0; /* y < ysiz */ ; y++) {
292			for (x = 0; x < xsiz-1; x++) {
293	greg	2.34	if (dev->inpready)
294	greg	1.1	goto escape;
295			/*
296			* Test super-pixel to the right.
297			*/
298			if (pl[x] != pl[x+1] && bigdiff(pl[x]->v,
299			pl[x+1]->v, maxdiff)) {
300	greg	2.29	refine(pl[x], 1);
301			refine(pl[x+1], 1);
302	greg	1.1	}
303			}
304			if (y >= ysiz-1)
305			break;
306			for (x = 0; x < xsiz; x++) {
307	greg	2.34	if (dev->inpready)
308	greg	1.1	goto escape;
309			/*
310			* Find super-pixel at this position in next row.
311			*/
312	greg	1.9	p = findrect(pframe.l+((x*hresolu)>>pdepth),
313			pframe.d+(((y+1)*vresolu)>>pdepth),
314	greg	2.29	&ptrunk, pdepth);
315	greg	1.1	/*
316			* Test super-pixel in next row.
317			*/
318			if (pl[x] != p && bigdiff(pl[x]->v, p->v, maxdiff)) {
319	greg	2.29	refine(pl[x], 1);
320			refine(p, 1);
321	greg	1.1	}
322			/*
323			* Copy into super-pixel array.
324			*/
325			pl[x] = p;
326			}
327			}
328			escape:
329	greg	2.18	free((void *)pl);
330	greg	1.1	}
331
332
333			int
334	greg	2.29	refine( /* refine a node */
335			PNODE *p,
336			int pd
337			)
338	greg	1.1	{
339			int growth;
340			int mx, my;
341
342			if (dev->inpready) /* quit for input */
343			return(0);
344
345			if (pd <= 0) /* depth limit */
346			return(0);
347
348	greg	2.29	mx = (p->xmin + p->xmax) >> 1;
349			my = (p->ymin + p->ymax) >> 1;
350	greg	1.1	growth = 0;
351
352			if (p->kid == NULL) { /* subdivide */
353
354			if ((p->kid = newptree()) == NULL)
355	greg	1.20	return(0);
356	greg	2.29
357			p->kid[UR].xmin = mx;
358			p->kid[UR].ymin = my;
359			p->kid[UR].xmax = p->xmax;
360			p->kid[UR].ymax = p->ymax;
361			p->kid[UL].xmin = p->xmin;
362			p->kid[UL].ymin = my;
363			p->kid[UL].xmax = mx;
364			p->kid[UL].ymax = p->ymax;
365			p->kid[DR].xmin = mx;
366			p->kid[DR].ymin = p->ymin;
367			p->kid[DR].xmax = p->xmax;
368			p->kid[DR].ymax = my;
369			p->kid[DL].xmin = p->xmin;
370			p->kid[DL].ymin = p->ymin;
371			p->kid[DL].xmax = mx;
372			p->kid[DL].ymax = my;
373	greg	1.1	/*
374			* The following paint order can leave a black pixel
375	greg	2.7	* if redraw() is called in (*dev->paintr)().
376	greg	1.1	*/
377			if (p->x >= mx && p->y >= my)
378			pcopy(p, p->kid+UR);
379	greg	2.29	else if (paint(p->kid+UR) < 0)
380			quit(1);
381	greg	1.1	if (p->x < mx && p->y >= my)
382			pcopy(p, p->kid+UL);
383	greg	2.29	else if (paint(p->kid+UL) < 0)
384			quit(1);
385	greg	1.1	if (p->x >= mx && p->y < my)
386			pcopy(p, p->kid+DR);
387	greg	2.29	else if (paint(p->kid+DR) < 0)
388			quit(1);
389	greg	1.1	if (p->x < mx && p->y < my)
390			pcopy(p, p->kid+DL);
391	greg	2.29	else if (paint(p->kid+DL) < 0)
392			quit(1);
393	greg	1.1
394			growth++;
395			}
396			/* do children */
397			if (mx > pframe.l) {
398			if (my > pframe.d)
399	greg	2.29	growth += refine(p->kid+DL, pd-1);
400	greg	1.1	if (my < pframe.u)
401	greg	2.29	growth += refine(p->kid+UL, pd-1);
402	greg	1.1	}
403			if (mx < pframe.r) {
404			if (my > pframe.d)
405	greg	2.29	growth += refine(p->kid+DR, pd-1);
406	greg	1.1	if (my < pframe.u)
407	greg	2.29	growth += refine(p->kid+UR, pd-1);
408	greg	1.1	}
409			return(growth);
410			}