src/rt/rview.c

#ifndef lint
static const char       RCSid[] = "$Id: rview.c,v 2.37 2013/10/18 17:04:13 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  "paths.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  *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:	2.38
Committed:	Sat Jun 7 05:09:46 2025 UTC (4 months, 4 weeks ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad6R0, HEAD
Changes since 2.37:	+3 -2 lines
Log Message:	refactor: Put some declarations into "paths.h" and included in "platform.h"
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.38	static const char RCSid[] = "$Id: rview.c,v 2.37 2013/10/18 17:04:13 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	2.38	#include "paths.h"
17	greg	1.1	#include "rpaint.h"
18
19	greg	2.8	#define CTRL(c) ((c)-'@')
20	greg	1.1
21
22	greg	2.18	void
23	greg	2.32	quit(code) /* quit program */
24			int code;
25			{
26			if (ray_pnprocs > 0) /* close children if any */
27	greg	2.33	ray_pclose(0);
28	greg	2.36	if (!ray_pnprocs) /* in parent */
29	greg	2.33	devclose();
30	greg	2.32	exit(code);
31			}
32
33
34			void
35	greg	2.29	devopen( /* open device driver */
36			char *dname
37			)
38	greg	1.1	{
39	greg	2.38	extern char *octname;
40	greg	1.7	char *id;
41	greg	2.29	int i;
42	greg	1.6
43	greg	1.7	id = octname!=NULL ? octname : progname;
44	greg	1.1	/* check device table */
45			for (i = 0; devtable[i].name; i++)
46	schorsch	2.23	if (!strcmp(dname, devtable[i].name)) {
47	greg	1.7	if ((dev = (*devtable[i].init)(dname, id)) == NULL) {
48	greg	1.1	sprintf(errmsg, "cannot initialize %s", dname);
49			error(USER, errmsg);
50			} else
51			return;
52	schorsch	2.23	}
53	greg	1.1	/* not there, try exec */
54	greg	1.7	if ((dev = comm_init(dname, id)) == NULL) {
55	greg	1.1	sprintf(errmsg, "cannot start device \"%s\"", dname);
56			error(USER, errmsg);
57			}
58			}
59
60
61	greg	2.18	void
62	greg	2.29	devclose(void) /* close our device */
63	greg	1.1	{
64			if (dev != NULL)
65			(*dev->close)();
66			dev = NULL;
67			}
68
69
70	greg	2.18	void
71	greg	2.29	printdevices(void) /* print list of output devices */
72	greg	1.1	{
73	greg	2.29	int i;
74	greg	1.1
75			for (i = 0; devtable[i].name; i++)
76			printf("%-16s # %s\n", devtable[i].name, devtable[i].descrip);
77			}
78
79
80	greg	2.18	void
81	greg	2.29	rview(void) /* do a view */
82	greg	1.1	{
83			char buf[32];
84
85	greg	2.18	devopen(dvcname); /* open device */
86	greg	2.29	newimage(NULL); /* start image */
87	greg	1.14
88	greg	1.1	for ( ; ; ) { /* quit in command() */
89	greg	1.14	while (hresolu <= 1<<pdepth && vresolu <= 1<<pdepth)
90	greg	1.1	command("done: ");
91	greg	1.14	errno = 0;
92			if (hresolu <= psample<<pdepth && vresolu <= psample<<pdepth) {
93	greg	1.1	sprintf(buf, "%d sampling...\n", 1<<pdepth);
94			(*dev->comout)(buf);
95			rsample();
96			} else {
97			sprintf(buf, "%d refining...\n", 1<<pdepth);
98			(*dev->comout)(buf);
99	greg	2.29	refine(&ptrunk, pdepth+1);
100	greg	1.1	}
101	greg	2.29	if (dev->inpready) /* noticed some input */
102	greg	1.1	command(": ");
103	greg	1.14	else /* finished this depth */
104	greg	1.1	pdepth++;
105			}
106			}
107
108
109	greg	2.18	void
110	greg	2.29	command( /* get/execute command */
111			char *prompt
112			)
113	greg	1.1	{
114	greg	2.8	#define badcom(s) strncmp(s, inpbuf, args-inpbuf-1)
115	greg	1.1	char inpbuf[256];
116			char *args;
117			again:
118	greg	1.10	(dev->comin)(inpbuf, prompt); / get command + arguments */
119	greg	1.1	for (args = inpbuf; args && args != ' '; args++)
120			;
121			if (args) args++ = '\0';
122			else *++args = '\0';
123	greg	2.30
124			if (waitrays() < 0) /* clear ray queue */
125			quit(1);
126	greg	1.1
127			switch (inpbuf[0]) {
128	greg	2.27	case 'f': /* new frame (\|focus\|free) */
129	greg	2.10	if (badcom("frame")) {
130	greg	2.27	if (badcom("focus")) {
131			if (badcom("free"))
132			goto commerr;
133			free_objmem();
134			break;
135			}
136			getfocus(args);
137	greg	2.10	break;
138			}
139	greg	1.1	getframe(args);
140			break;
141			case 'v': /* view */
142			if (badcom("view"))
143			goto commerr;
144			getview(args);
145			break;
146			case 'l': /* last view */
147			if (badcom("last"))
148			goto commerr;
149			lastview(args);
150	greg	2.11	break;
151			case 'V': /* save view */
152			if (badcom("V"))
153			goto commerr;
154			saveview(args);
155			break;
156			case 'L': /* load view */
157			if (badcom("L"))
158			goto commerr;
159			loadview(args);
160	greg	1.1	break;
161			case 'e': /* exposure */
162			if (badcom("exposure"))
163			goto commerr;
164			getexposure(args);
165			break;
166			case 's': /* set a parameter */
167	greg	2.13	if (badcom("set")) {
168			#ifdef SIGTSTP
169			if (!badcom("stop"))
170			goto dostop;
171			#endif
172	greg	1.1	goto commerr;
173	greg	2.13	}
174	greg	1.1	setparam(args);
175			break;
176			case 'n': /* new picture */
177			if (badcom("new"))
178			goto commerr;
179	greg	2.29	newimage(args);
180	greg	1.1	break;
181			case 't': /* trace a ray */
182			if (badcom("trace"))
183			goto commerr;
184			traceray(args);
185			break;
186			case 'a': /* aim camera */
187			if (badcom("aim"))
188			goto commerr;
189			getaim(args);
190			break;
191	greg	2.10	case 'm': /* move camera (or memstats) */
192	greg	1.1	if (badcom("move"))
193			goto commerr;
194			getmove(args);
195			break;
196	greg	1.8	case 'r': /* rotate/repaint */
197			if (badcom("rotate")) {
198	greg	2.13	if (badcom("repaint")) {
199			if (badcom("redraw"))
200			goto commerr;
201			redraw();
202			break;
203			}
204	greg	1.8	getrepaint(args);
205			break;
206			}
207	greg	1.1	getrotate(args);
208			break;
209			case 'p': /* pivot view */
210	greg	2.13	if (badcom("pivot")) {
211			if (badcom("pause"))
212			goto commerr;
213			goto again;
214			}
215	greg	1.1	getpivot(args);
216			break;
217	greg	2.37	case 'o': /* origin view */
218			if (badcom("origin"))
219			goto commerr;
220			getorigin(args);
221			break;
222	greg	2.4	case CTRL('R'): /* redraw */
223	greg	1.1	redraw();
224			break;
225			case 'w': /* write */
226			if (badcom("write"))
227			goto commerr;
228			writepict(args);
229			break;
230			case 'q': /* quit */
231			if (badcom("quit"))
232			goto commerr;
233			quit(0);
234	greg	2.4	case CTRL('C'): /* interrupt */
235	greg	1.1	goto again;
236	greg	2.8	#ifdef SIGTSTP
237	greg	2.13	case CTRL('Z'):; /* stop */
238			dostop:
239	greg	1.1	devclose();
240			kill(0, SIGTSTP);
241			/* pc stops here */
242	greg	2.18	devopen(dvcname);
243	greg	1.1	redraw();
244			break;
245			#endif
246			case '\0': /* continue */
247			break;
248			default:;
249			commerr:
250			if (iscntrl(inpbuf[0]))
251			sprintf(errmsg, "^%c: unknown control",
252			inpbuf[0]\|0100);
253			else
254			sprintf(errmsg, "%s: unknown command", inpbuf);
255			error(COMMAND, errmsg);
256			break;
257			}
258	greg	2.36	if (newparam && ray_pnprocs) /* drop into immediate mode */
259			ray_pclose(0);
260	greg	2.8	#undef badcom
261	greg	1.1	}
262
263
264	greg	2.18	void
265	greg	2.29	rsample(void) /* sample the image */
266	greg	1.1	{
267			int xsiz, ysiz, y;
268			PNODE *p;
269	greg	2.29	PNODE **pl;
270			int x;
271	greg	1.1	/*
272			* We initialize the bottom row in the image at our current
273	greg	2.8	* resolution. During sampling, we check super-pixels to the
274	greg	1.1	* right and above by calling bigdiff(). If there is a significant
275			* difference, we subsample the super-pixels. The testing process
276			* includes initialization of the next row.
277			*/
278	greg	2.12	xsiz = (((long)(pframe.r-pframe.l)<<pdepth)+hresolu-1) / hresolu;
279			ysiz = (((long)(pframe.u-pframe.d)<<pdepth)+vresolu-1) / vresolu;
280	greg	1.1	pl = (PNODE *)malloc(xsizsizeof(PNODE *));
281	greg	2.29	if (pl == NULL)
282	greg	1.14	return;
283	greg	1.1	/*
284			* Initialize the bottom row.
285			*/
286	greg	2.29	pl[0] = findrect(pframe.l, pframe.d, &ptrunk, pdepth);
287	greg	1.1	for (x = 1; x < xsiz; x++) {
288	greg	1.9	pl[x] = findrect(pframe.l+((x*hresolu)>>pdepth),
289	greg	2.29	pframe.d, &ptrunk, pdepth);
290	greg	1.1	}
291			/* sample the image */
292			for (y = 0; /* y < ysiz */ ; y++) {
293			for (x = 0; x < xsiz-1; x++) {
294	greg	2.34	if (dev->inpready)
295	greg	1.1	goto escape;
296			/*
297			* Test super-pixel to the right.
298			*/
299			if (pl[x] != pl[x+1] && bigdiff(pl[x]->v,
300			pl[x+1]->v, maxdiff)) {
301	greg	2.29	refine(pl[x], 1);
302			refine(pl[x+1], 1);
303	greg	1.1	}
304			}
305			if (y >= ysiz-1)
306			break;
307			for (x = 0; x < xsiz; x++) {
308	greg	2.34	if (dev->inpready)
309	greg	1.1	goto escape;
310			/*
311			* Find super-pixel at this position in next row.
312			*/
313	greg	1.9	p = findrect(pframe.l+((x*hresolu)>>pdepth),
314			pframe.d+(((y+1)*vresolu)>>pdepth),
315	greg	2.29	&ptrunk, pdepth);
316	greg	1.1	/*
317			* Test super-pixel in next row.
318			*/
319			if (pl[x] != p && bigdiff(pl[x]->v, p->v, maxdiff)) {
320	greg	2.29	refine(pl[x], 1);
321			refine(p, 1);
322	greg	1.1	}
323			/*
324			* Copy into super-pixel array.
325			*/
326			pl[x] = p;
327			}
328			}
329			escape:
330	greg	2.18	free((void *)pl);
331	greg	1.1	}
332
333
334			int
335	greg	2.29	refine( /* refine a node */
336			PNODE *p,
337			int pd
338			)
339	greg	1.1	{
340			int growth;
341			int mx, my;
342
343			if (dev->inpready) /* quit for input */
344			return(0);
345
346			if (pd <= 0) /* depth limit */
347			return(0);
348
349	greg	2.29	mx = (p->xmin + p->xmax) >> 1;
350			my = (p->ymin + p->ymax) >> 1;
351	greg	1.1	growth = 0;
352
353			if (p->kid == NULL) { /* subdivide */
354
355			if ((p->kid = newptree()) == NULL)
356	greg	1.20	return(0);
357	greg	2.29
358			p->kid[UR].xmin = mx;
359			p->kid[UR].ymin = my;
360			p->kid[UR].xmax = p->xmax;
361			p->kid[UR].ymax = p->ymax;
362			p->kid[UL].xmin = p->xmin;
363			p->kid[UL].ymin = my;
364			p->kid[UL].xmax = mx;
365			p->kid[UL].ymax = p->ymax;
366			p->kid[DR].xmin = mx;
367			p->kid[DR].ymin = p->ymin;
368			p->kid[DR].xmax = p->xmax;
369			p->kid[DR].ymax = my;
370			p->kid[DL].xmin = p->xmin;
371			p->kid[DL].ymin = p->ymin;
372			p->kid[DL].xmax = mx;
373			p->kid[DL].ymax = my;
374	greg	1.1	/*
375			* The following paint order can leave a black pixel
376	greg	2.7	* if redraw() is called in (*dev->paintr)().
377	greg	1.1	*/
378			if (p->x >= mx && p->y >= my)
379			pcopy(p, p->kid+UR);
380	greg	2.29	else if (paint(p->kid+UR) < 0)
381			quit(1);
382	greg	1.1	if (p->x < mx && p->y >= my)
383			pcopy(p, p->kid+UL);
384	greg	2.29	else if (paint(p->kid+UL) < 0)
385			quit(1);
386	greg	1.1	if (p->x >= mx && p->y < my)
387			pcopy(p, p->kid+DR);
388	greg	2.29	else if (paint(p->kid+DR) < 0)
389			quit(1);
390	greg	1.1	if (p->x < mx && p->y < my)
391			pcopy(p, p->kid+DL);
392	greg	2.29	else if (paint(p->kid+DL) < 0)
393			quit(1);
394	greg	1.1
395			growth++;
396			}
397			/* do children */
398			if (mx > pframe.l) {
399			if (my > pframe.d)
400	greg	2.29	growth += refine(p->kid+DL, pd-1);
401	greg	1.1	if (my < pframe.u)
402	greg	2.29	growth += refine(p->kid+UL, pd-1);
403	greg	1.1	}
404			if (mx < pframe.r) {
405			if (my > pframe.d)
406	greg	2.29	growth += refine(p->kid+DR, pd-1);
407	greg	1.1	if (my < pframe.u)
408	greg	2.29	growth += refine(p->kid+UR, pd-1);
409	greg	1.1	}
410			return(growth);
411			}