src/ot/oconv.c

#ifndef lint
static const char RCSid[] = "$Id: oconv.c,v 2.24 2025/06/03 21:31:51 greg Exp $";
#endif
/*
 *  oconv.c - main program for object to octree conversion.
 *
 *     7/29/85
 */

#include  "platform.h"
#include  "standard.h"
#include  "octree.h"
#include  "object.h"
#include  "otypes.h"
#include  "resolu.h"
#include  "oconv.h"

#define  OMARGIN        (10*FTINY)      /* margin around global cube */

#define  MAXOBJFIL      255             /* maximum number of scene files */

int  nowarn = 0;                        /* supress warnings? */

int  objlim = 6;                        /* # of objects before split */

int  resolu = 16384;                    /* octree resolution limit */

CUBE  thescene = {{0.0, 0.0, 0.0}, 0.0, EMPTY};         /* our scene */

char  *ofname[MAXOBJFIL+1];             /* object file names */
int  nfiles = 0;                        /* number of object files */

double  mincusize;                      /* minimum cube size from resolu */

void  (*addobjnotify[])() = {NULL};     /* new object notifier functions */

static void addobject(CUBE  *cu, OBJECT obj);
static void add2full(CUBE  *cu, OBJECT  obj, int  inc);


int
main(           /* convert object files to an octree */
        int  argc,
        char  *argv[]
)
{
        FVECT  bbmin, bbmax;
        char  *infile = NULL;
        int  inpfrozen = 0;
        int  outflags = IO_ALL;
        OBJECT  startobj;
        int  i;

        fixargv0(argv[0]);              /* sets global progname */

        ot_initotypes();

        for (i = 1; i < argc && argv[i][0] == '-'; i++)
                switch (argv[i][1]) {
                case '\0':                              /* scene from stdin */
                        goto breakopt;
                case 'i':                               /* input octree */
                        infile = argv[++i];
                        break;
                case 'b':                               /* bounding cube */
                        thescene.cuorg[0] = atof(argv[++i]) - OMARGIN;
                        thescene.cuorg[1] = atof(argv[++i]) - OMARGIN;
                        thescene.cuorg[2] = atof(argv[++i]) - OMARGIN;
                        thescene.cusize = atof(argv[++i]) + 2*OMARGIN;
                        break;
                case 'n':                               /* set limit */
                        objlim = atoi(argv[++i]);
                        break;
                case 'r':                               /* resolution limit */
                        resolu = atoi(argv[++i]);
                        break;
                case 'f':                               /* freeze octree */
                        outflags &= ~IO_FILES;
                        break;
                case 'w':                               /* supress warnings */
                        nowarn = 1;
                        break;
                default:
                        sprintf(errmsg, "unknown option: '%s'", argv[i]);
                        error(USER, errmsg);
                        break;
                }
breakopt:
        SET_FILE_BINARY(stdout);
        if (infile != NULL) {           /* get old octree & objects */
                if (thescene.cusize > FTINY)
                        error(USER, "only one of '-b' or '-i'");
                nfiles = readoct(infile, IO_ALL, &thescene, ofname);
                if (nfiles == 0)
                        inpfrozen++;
        } else
                newheader("RADIANCE", stdout);  /* new binary file header */
        printargs(argc, argv, stdout);
        fputformat(OCTFMT, stdout);
        printf("\n");

        startobj = nobjects;            /* previous objects already converted */

        for ( ; i < argc; i++)          /* read new scene descriptions */
                if (!strcmp(argv[i], "-")) {    /* from stdin */
                        readobj(NULL);
                        outflags &= ~IO_FILES;
                } else {                        /* from file */
                        if (nfiles >= MAXOBJFIL)
                                error(INTERNAL, "too many scene files");
                        readobj(ofname[nfiles++] = argv[i]);
                }

        ofname[nfiles] = NULL;

        if (inpfrozen && outflags & IO_FILES) {
                error(WARNING, "frozen octree");
                outflags &= ~IO_FILES;
        }
                                                /* find bounding box */
        bbmin[0] = bbmin[1] = bbmin[2] = FHUGE;
        bbmax[0] = bbmax[1] = bbmax[2] = -FHUGE;
        for (i = startobj; i < nobjects; i++)
                add2bbox(objptr(i), bbmin, bbmax);
                                                /* set/check cube */
        if (thescene.cusize == 0.0) {
                if (bbmin[0] <= bbmax[0]) {
                        for (i = 0; i < 3; i++) {
                                bbmin[i] -= OMARGIN;
                                bbmax[i] += OMARGIN;
                        }
                        for (i = 0; i < 3; i++)
                                if (bbmax[i] - bbmin[i] > thescene.cusize)
                                        thescene.cusize = bbmax[i] - bbmin[i];
                        for (i = 0; i < 3; i++)
                                thescene.cuorg[i] =
                                        (bbmax[i]+bbmin[i]-thescene.cusize)*.5;
                }
        } else {
                for (i = 0; i < 3; i++)
                        if (bbmin[i] < thescene.cuorg[i] ||
                                bbmax[i] > thescene.cuorg[i] + thescene.cusize)
                                error(USER, "boundary does not encompass scene");
        }

        mincusize = thescene.cusize / resolu - FTINY;

        for (i = startobj; i < nobjects; i++)           /* add new objects */
                addobject(&thescene, i);

        thescene.cutree = combine(thescene.cutree);     /* optimize */

        writeoct(outflags, &thescene, ofname);  /* write structures to stdout */

        quit(0);
        return 0; /* pro forma return */
}


void
quit(                           /* exit program */
        int  code
)
{
        exit(code);
}


void
cputs(void)                                     /* interactive error */
{
        /* referenced, but not used */
}


void
wputs(                          /* warning message */
        const char  *s
)
{
        if (!nowarn)
                eputs(s);
}


void
eputs(                          /* put string to stderr */
        const char  *s
)
{
        static int  inln = 0;

        if (!inln++) {
                fputs(progname, stderr);
                fputs(": ", stderr);
        }
        fputs(s, stderr);
        if (*s && s[strlen(s)-1] == '\n')
                inln = 0;
}

                                /* conflicting def's in param.h */
#undef  tstbit
#undef  setbit
#undef  clrbit
#undef  tglbit

#define  bitop(f,i,op)          (f[((i)>>3)] op (1<<((i)&7)))
#define  tstbit(f,i)            bitop(f,i,&)
#define  setbit(f,i)            bitop(f,i,|=)
#define  clrbit(f,i)            bitop(f,i,&=~)
#define  tglbit(f,i)            bitop(f,i,^=)


static void
addobject(                      /* add an object to a cube */
        CUBE  *cu,
        OBJECT  obj
)
{
        int  inc;

        inc = (*ofun[objptr(obj)->otype].funp)(objptr(obj), cu);

        if (inc == O_MISS)
                return;                         /* no intersection */

        if (istree(cu->cutree)) {
                CUBE  cukid;                    /* do children */
                int  i, j;
                cukid.cusize = cu->cusize * 0.5;
                for (i = 0; i < 8; i++) {
                        cukid.cutree = octkid(cu->cutree, i);
                        for (j = 0; j < 3; j++) {
                                cukid.cuorg[j] = cu->cuorg[j];
                                if ((1<<j) & i)
                                        cukid.cuorg[j] += cukid.cusize;
                        }
                        addobject(&cukid, obj);
                        octkid(cu->cutree, i) = cukid.cutree;
                }
                return;
        }
        if (isempty(cu->cutree)) {
                OBJECT  oset[2];                /* singular set */
                oset[0] = 1; oset[1] = obj;
                cu->cutree = fullnode(oset);
                return;
        }
                                        /* add to full node */
        add2full(cu, obj, inc);
}


static void
add2full(                       /* add object to full node */
        CUBE  *cu,
        OBJECT  obj,
        int  inc
)
{
        OCTREE  ot;
        OBJECT  oset[MAXSET+1];
        CUBE  cukid;
        unsigned char  inflg[(MAXSET+7)/8], volflg[(MAXSET+7)/8];
        int  i, j;

        objset(oset, cu->cutree);
        cukid.cusize = cu->cusize * 0.5;

        if (inc==O_IN || oset[0] < objlim || cukid.cusize <
                        (oset[0] < MAXSET ? mincusize : mincusize/256.0)) {
                                                /* add to set */
                if (oset[0] >= MAXSET) {
                        sprintf(errmsg, "set overflow in addobject (%s)",
                                        objptr(obj)->oname);
                        error(INTERNAL, errmsg);
                }
                insertelem(oset, obj);
                cu->cutree = fullnode(oset);
                return;
        }
                                        /* subdivide cube */
        if ((ot = octalloc()) == EMPTY)
                error(SYSTEM, "out of octree space");
                                        /* mark volumes */
        j = (oset[0]+7)>>3;
        while (j--)
                volflg[j] = inflg[j] = 0;
        for (j = 1; j <= oset[0]; j++)
                if (isvolume(objptr(oset[j])->otype)) {
                        setbit(volflg,j-1);
                        if ((*ofun[objptr(oset[j])->otype].funp)
                                        (objptr(oset[j]), cu) == O_IN)
                                setbit(inflg,j-1);
                }
                                        /* assign subcubes */
        for (i = 0; i < 8; i++) {
                cukid.cutree = EMPTY;
                for (j = 0; j < 3; j++) {
                        cukid.cuorg[j] = cu->cuorg[j];
                        if ((1<<j) & i)
                                cukid.cuorg[j] += cukid.cusize;
                }
                                        /* surfaces first */
                for (j = 1; j <= oset[0]; j++)
                        if (!tstbit(volflg,j-1))
                                addobject(&cukid, oset[j]);
                                        /* then this object */
                addobject(&cukid, obj);
                                        /* then partial volumes */
                for (j = 1; j <= oset[0]; j++)
                        if (tstbit(volflg,j-1) &&
                                        !tstbit(inflg,j-1))
                                addobject(&cukid, oset[j]);
                                        /* full volumes last */
                for (j = 1; j <= oset[0]; j++)
                        if (tstbit(inflg,j-1))
                                addobject(&cukid, oset[j]);
                                        /* returned node */
                octkid(ot, i) = cukid.cutree;
        }
        cu->cutree = ot;
}
Revision:	2.25
Committed:	Sat Jun 7 05:09:46 2025 UTC (16 hours, 17 minutes ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 2.24:	+1 -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	2.25	static const char RCSid[] = "$Id: oconv.c,v 2.24 2025/06/03 21:31:51 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* oconv.c - main program for object to octree conversion.
6			*
7			* 7/29/85
8			*/
9
10	greg	2.18	#include "platform.h"
11	greg	1.1	#include "standard.h"
12			#include "octree.h"
13			#include "object.h"
14			#include "otypes.h"
15	schorsch	2.19	#include "resolu.h"
16			#include "oconv.h"
17	greg	1.14
18	greg	2.4	#define OMARGIN (10FTINY) / margin around global cube */
19	greg	1.2
20	greg	2.22	#define MAXOBJFIL 255 /* maximum number of scene files */
21	greg	1.1
22			int nowarn = 0; /* supress warnings? */
23
24	greg	2.14	int objlim = 6; /* # of objects before split */
25	greg	1.1
26	greg	2.14	int resolu = 16384; /* octree resolution limit */
27	greg	1.1
28	greg	2.21	CUBE thescene = {{0.0, 0.0, 0.0}, 0.0, EMPTY}; /* our scene */
29	greg	1.1
30			char ofname[MAXOBJFIL+1]; / object file names */
31			int nfiles = 0; /* number of object files */
32
33	greg	2.4	double mincusize; /* minimum cube size from resolu */
34	greg	1.1
35	greg	2.12	void (addobjnotify[])() = {NULL}; / new object notifier functions */
36	greg	1.7
37	schorsch	2.19	static void addobject(CUBE *cu, OBJECT obj);
38			static void add2full(CUBE *cu, OBJECT obj, int inc);
39	greg	1.1
40	schorsch	2.19
41			int
42			main( /* convert object files to an octree */
43			int argc,
44			char *argv[]
45			)
46	greg	1.1	{
47			FVECT bbmin, bbmax;
48			char *infile = NULL;
49	greg	2.6	int inpfrozen = 0;
50	greg	1.1	int outflags = IO_ALL;
51	greg	2.4	OBJECT startobj;
52	greg	1.1	int i;
53
54	greg	2.24	fixargv0(argv[0]); /* sets global progname */
55	greg	1.1
56	schorsch	2.19	ot_initotypes();
57	greg	1.12
58	greg	1.5	for (i = 1; i < argc && argv[i][0] == '-'; i++)
59	greg	1.1	switch (argv[i][1]) {
60	greg	1.5	case '\0': /* scene from stdin */
61			goto breakopt;
62	greg	1.1	case 'i': /* input octree */
63			infile = argv[++i];
64			break;
65			case 'b': /* bounding cube */
66	greg	1.2	thescene.cuorg[0] = atof(argv[++i]) - OMARGIN;
67			thescene.cuorg[1] = atof(argv[++i]) - OMARGIN;
68			thescene.cuorg[2] = atof(argv[++i]) - OMARGIN;
69			thescene.cusize = atof(argv[++i]) + 2*OMARGIN;
70	greg	1.1	break;
71			case 'n': /* set limit */
72			objlim = atoi(argv[++i]);
73			break;
74			case 'r': /* resolution limit */
75			resolu = atoi(argv[++i]);
76			break;
77			case 'f': /* freeze octree */
78			outflags &= ~IO_FILES;
79			break;
80			case 'w': /* supress warnings */
81			nowarn = 1;
82			break;
83			default:
84			sprintf(errmsg, "unknown option: '%s'", argv[i]);
85			error(USER, errmsg);
86			break;
87			}
88	greg	1.5	breakopt:
89	schorsch	2.15	SET_FILE_BINARY(stdout);
90	greg	1.1	if (infile != NULL) { /* get old octree & objects */
91			if (thescene.cusize > FTINY)
92			error(USER, "only one of '-b' or '-i'");
93			nfiles = readoct(infile, IO_ALL, &thescene, ofname);
94	greg	2.6	if (nfiles == 0)
95			inpfrozen++;
96	greg	2.8	} else
97			newheader("RADIANCE", stdout); /* new binary file header */
98	greg	2.7	printargs(argc, argv, stdout);
99	greg	1.13	fputformat(OCTFMT, stdout);
100	greg	1.1	printf("\n");
101
102			startobj = nobjects; /* previous objects already converted */
103	greg	2.5
104	greg	1.4	for ( ; i < argc; i++) /* read new scene descriptions */
105			if (!strcmp(argv[i], "-")) { /* from stdin */
106			readobj(NULL);
107			outflags &= ~IO_FILES;
108			} else { /* from file */
109			if (nfiles >= MAXOBJFIL)
110			error(INTERNAL, "too many scene files");
111			readobj(ofname[nfiles++] = argv[i]);
112			}
113
114	greg	1.1	ofname[nfiles] = NULL;
115	greg	2.6
116			if (inpfrozen && outflags & IO_FILES) {
117			error(WARNING, "frozen octree");
118			outflags &= ~IO_FILES;
119			}
120	greg	1.1	/* find bounding box */
121			bbmin[0] = bbmin[1] = bbmin[2] = FHUGE;
122			bbmax[0] = bbmax[1] = bbmax[2] = -FHUGE;
123			for (i = startobj; i < nobjects; i++)
124			add2bbox(objptr(i), bbmin, bbmax);
125			/* set/check cube */
126			if (thescene.cusize == 0.0) {
127			if (bbmin[0] <= bbmax[0]) {
128			for (i = 0; i < 3; i++) {
129	greg	1.2	bbmin[i] -= OMARGIN;
130			bbmax[i] += OMARGIN;
131	greg	1.1	}
132			for (i = 0; i < 3; i++)
133			if (bbmax[i] - bbmin[i] > thescene.cusize)
134			thescene.cusize = bbmax[i] - bbmin[i];
135	greg	1.3	for (i = 0; i < 3; i++)
136			thescene.cuorg[i] =
137			(bbmax[i]+bbmin[i]-thescene.cusize)*.5;
138	greg	1.1	}
139			} else {
140			for (i = 0; i < 3; i++)
141			if (bbmin[i] < thescene.cuorg[i] \|\|
142			bbmax[i] > thescene.cuorg[i] + thescene.cusize)
143			error(USER, "boundary does not encompass scene");
144			}
145
146			mincusize = thescene.cusize / resolu - FTINY;
147	greg	2.5
148	greg	1.1	for (i = startobj; i < nobjects; i++) /* add new objects */
149			addobject(&thescene, i);
150	greg	2.5
151	greg	1.1	thescene.cutree = combine(thescene.cutree); /* optimize */
152
153			writeoct(outflags, &thescene, ofname); /* write structures to stdout */
154
155			quit(0);
156	schorsch	2.19	return 0; /* pro forma return */
157	greg	1.1	}
158
159
160	greg	2.12	void
161	schorsch	2.19	quit( /* exit program */
162			int code
163			)
164	greg	1.1	{
165			exit(code);
166			}
167
168
169	greg	2.12	void
170	schorsch	2.19	cputs(void) /* interactive error */
171	greg	1.1	{
172			/* referenced, but not used */
173			}
174
175
176	greg	2.12	void
177	schorsch	2.19	wputs( /* warning message */
178	greg	2.23	const char *s
179	schorsch	2.19	)
180	greg	1.1	{
181			if (!nowarn)
182			eputs(s);
183			}
184
185
186	greg	2.12	void
187	schorsch	2.19	eputs( /* put string to stderr */
188	greg	2.23	const char *s
189	schorsch	2.19	)
190	greg	1.1	{
191	greg	1.9	static int inln = 0;
192	greg	1.1
193	greg	1.9	if (!inln++) {
194	greg	1.1	fputs(progname, stderr);
195			fputs(": ", stderr);
196			}
197			fputs(s, stderr);
198			if (*s && s[strlen(s)-1] == '\n')
199	greg	1.9	inln = 0;
200	greg	1.1	}
201
202	greg	2.17	/* conflicting def's in param.h */
203			#undef tstbit
204			#undef setbit
205			#undef clrbit
206			#undef tglbit
207	greg	1.1
208	greg	2.4	#define bitop(f,i,op) (f[((i)>>3)] op (1<<((i)&7)))
209			#define tstbit(f,i) bitop(f,i,&)
210			#define setbit(f,i) bitop(f,i,\|=)
211			#define clrbit(f,i) bitop(f,i,&=~)
212			#define tglbit(f,i) bitop(f,i,^=)
213	greg	1.11
214
215	schorsch	2.19	static void
216			addobject( /* add an object to a cube */
217	greg	2.23	CUBE *cu,
218	schorsch	2.19	OBJECT obj
219			)
220	greg	1.1	{
221	greg	2.13	int inc;
222	greg	1.1
223	greg	2.13	inc = (*ofun[objptr(obj)->otype].funp)(objptr(obj), cu);
224	greg	1.1
225	greg	2.13	if (inc == O_MISS)
226	greg	1.1	return; /* no intersection */
227	greg	2.5
228	greg	1.1	if (istree(cu->cutree)) {
229	greg	2.13	CUBE cukid; /* do children */
230			int i, j;
231	greg	1.1	cukid.cusize = cu->cusize * 0.5;
232			for (i = 0; i < 8; i++) {
233			cukid.cutree = octkid(cu->cutree, i);
234			for (j = 0; j < 3; j++) {
235			cukid.cuorg[j] = cu->cuorg[j];
236			if ((1<<j) & i)
237			cukid.cuorg[j] += cukid.cusize;
238			}
239			addobject(&cukid, obj);
240			octkid(cu->cutree, i) = cukid.cutree;
241			}
242	greg	1.11	return;
243			}
244			if (isempty(cu->cutree)) {
245	greg	2.13	OBJECT oset[2]; /* singular set */
246	greg	1.1	oset[0] = 1; oset[1] = obj;
247			cu->cutree = fullnode(oset);
248	greg	1.11	return;
249			}
250			/* add to full node */
251	greg	2.13	add2full(cu, obj, inc);
252			}
253
254
255	schorsch	2.19	static void
256			add2full( /* add object to full node */
257	greg	2.23	CUBE *cu,
258	schorsch	2.19	OBJECT obj,
259			int inc
260			)
261	greg	2.13	{
262			OCTREE ot;
263			OBJECT oset[MAXSET+1];
264			CUBE cukid;
265			unsigned char inflg[(MAXSET+7)/8], volflg[(MAXSET+7)/8];
266	greg	2.23	int i, j;
267	greg	2.13
268	greg	1.11	objset(oset, cu->cutree);
269			cukid.cusize = cu->cusize * 0.5;
270	greg	2.5
271	greg	2.20	if (inc==O_IN \|\| oset[0] < objlim \|\| cukid.cusize <
272			(oset[0] < MAXSET ? mincusize : mincusize/256.0)) {
273	greg	1.11	/* add to set */
274			if (oset[0] >= MAXSET) {
275	greg	2.3	sprintf(errmsg, "set overflow in addobject (%s)",
276	greg	1.11	objptr(obj)->oname);
277			error(INTERNAL, errmsg);
278	greg	1.1	}
279	greg	1.11	insertelem(oset, obj);
280			cu->cutree = fullnode(oset);
281			return;
282	greg	1.1	}
283	greg	1.11	/* subdivide cube */
284			if ((ot = octalloc()) == EMPTY)
285			error(SYSTEM, "out of octree space");
286			/* mark volumes */
287			j = (oset[0]+7)>>3;
288			while (j--)
289			volflg[j] = inflg[j] = 0;
290			for (j = 1; j <= oset[0]; j++)
291			if (isvolume(objptr(oset[j])->otype)) {
292			setbit(volflg,j-1);
293			if ((*ofun[objptr(oset[j])->otype].funp)
294	greg	2.3	(objptr(oset[j]), cu) == O_IN)
295	greg	1.11	setbit(inflg,j-1);
296			}
297			/* assign subcubes */
298			for (i = 0; i < 8; i++) {
299			cukid.cutree = EMPTY;
300			for (j = 0; j < 3; j++) {
301			cukid.cuorg[j] = cu->cuorg[j];
302			if ((1<<j) & i)
303			cukid.cuorg[j] += cukid.cusize;
304			}
305			/* surfaces first */
306			for (j = 1; j <= oset[0]; j++)
307			if (!tstbit(volflg,j-1))
308			addobject(&cukid, oset[j]);
309			/* then this object */
310			addobject(&cukid, obj);
311	greg	2.3	/* then partial volumes */
312	greg	1.11	for (j = 1; j <= oset[0]; j++)
313			if (tstbit(volflg,j-1) &&
314			!tstbit(inflg,j-1))
315			addobject(&cukid, oset[j]);
316	greg	2.3	/* full volumes last */
317	greg	1.11	for (j = 1; j <= oset[0]; j++)
318			if (tstbit(inflg,j-1))
319			addobject(&cukid, oset[j]);
320			/* returned node */
321			octkid(ot, i) = cukid.cutree;
322			}
323			cu->cutree = ot;
324	greg	1.1	}