src/common/readoct.c

#ifndef lint
static const char       RCSid[] = "$Id: readoct.c,v 2.23 2003/10/22 02:06:34 greg Exp $";
#endif
/*
 *  readoct.c - routines to read octree information.
 */

#include "copyright.h"

#include  <stdio.h>
#include  <time.h>

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

static double  ogetflt(void);
static long  ogetint(int);
static char  *ogetstr(char *);
static int  nonsurfinset(OBJECT *);
static void  octerror(int  etyp, char  *msg);
static void  skiptree(void);
static OCTREE  getfullnode(void), gettree(void);

static char  *infn;                     /* input file specification */
static FILE  *infp;                     /* input file stream */
static int  objsize;                    /* size of stored OBJECT's */
static OBJECT  objorig;                 /* zeroeth object */
static OBJECT  fnobjects;               /* number of objects in this file */


int
readoct(inpspec, load, scene, ofn)      /* read in octree file or stream */
char  *inpspec;
int  load;
CUBE  *scene;
char  *ofn[];
{
        char  sbuf[512];
        int  nf;
        int  i;
        long  m;
        
        if (inpspec == NULL) {
                infn = "standard input";
                infp = stdin;
        } else if (inpspec[0] == '!') {
                infn = inpspec;
                if ((infp = popen(inpspec+1, "r")) == NULL) {
                        sprintf(errmsg, "cannot execute \"%s\"", inpspec);
                        error(SYSTEM, errmsg);
                }
        } else {
                infn = inpspec;
                if ((infp = fopen(inpspec, "r")) == NULL) {
                        sprintf(errmsg, "cannot open octree file \"%s\"",
                                        inpspec);
                        error(SYSTEM, errmsg);
                }
        }
        SET_FILE_BINARY(infp);
                                        /* get header */
        if (checkheader(infp, OCTFMT, load&IO_INFO ? stdout : (FILE *)NULL) < 0)
                octerror(USER, "not an octree");
                                        /* check format */
        if ((objsize = ogetint(2)-OCTMAGIC) <= 0 ||
                        objsize > MAXOBJSIZ || objsize > sizeof(long))
                octerror(USER, "incompatible octree format");
                                        /* get boundaries */
        if (load & IO_BOUNDS) {
                for (i = 0; i < 3; i++)
                        scene->cuorg[i] = atof(ogetstr(sbuf));
                scene->cusize = atof(ogetstr(sbuf));
        } else {
                for (i = 0; i < 4; i++)
                        ogetstr(sbuf);
        }
        objorig = nobjects;             /* set object offset */
        nf = 0;                         /* get object files */
        while (*ogetstr(sbuf)) {
                if (load & IO_SCENE)
                        readobj(sbuf);
                if (load & IO_FILES)
                        ofn[nf] = savqstr(sbuf);
                nf++;
        }
        if (load & IO_FILES)
                ofn[nf] = NULL;
                                        /* get number of objects */
        fnobjects = m = ogetint(objsize);
        if (fnobjects != m)
                octerror(USER, "too many objects");

        if (load & IO_TREE)             /* get the octree */
                scene->cutree = gettree();
        else if (load & IO_SCENE && nf == 0)
                skiptree();
                
        if (load & IO_SCENE) {          /* get the scene */
            if (nf == 0) {
                                        /* load binary scene data */
                readscene(infp, objsize);

            } else {                    /* consistency checks */
                                /* check object count */
                if (nobjects != objorig+fnobjects)
                        octerror(USER, "bad object count; octree stale?");
                                /* check for non-surfaces */
                if (dosets(nonsurfinset))
                        octerror(USER, "modifier in tree; octree stale?");
            }
        }
                                /* close the input */
        if (infn[0] == '!')
                pclose(infp);
        else
                fclose(infp);
        return(nf);
}


static char *
ogetstr(s)                      /* get null-terminated string */
char  *s;
{
        extern char  *getstr();

        if (getstr(s, infp) == NULL)
                octerror(USER, "truncated octree");
        return(s);
}


static OCTREE
getfullnode()                   /* get a set, return fullnode */
{
        OBJECT  set[MAXSET+1];
        register int  i;
        register long  m;

        if ((set[0] = ogetint(objsize)) > MAXSET)
                octerror(USER, "bad set in getfullnode");
        for (i = 1; i <= set[0]; i++) {
                m = ogetint(objsize) + objorig;
                if ((set[i] = m) != m)
                        octerror(USER, "too many objects");
        }
        return(fullnode(set));
}       


static long
ogetint(siz)                    /* get a siz-byte integer */
int  siz;
{
        extern long  getint();
        register long  r;

        r = getint(siz, infp);
        if (feof(infp))
                octerror(USER, "truncated octree");
        return(r);
}


static double
ogetflt()                       /* get a floating point number */
{
        extern double  getflt();
        double  r;

        r = getflt(infp);
        if (feof(infp))
                octerror(USER, "truncated octree");
        return(r);
}
        

static OCTREE
gettree()                       /* get a pre-ordered octree */
{
        register OCTREE  ot;
        register int  i;
        
        switch (getc(infp)) {
        case OT_EMPTY:
                return(EMPTY);
        case OT_FULL:
                return(getfullnode());
        case OT_TREE:
                if ((ot = octalloc()) == EMPTY)
                        octerror(SYSTEM, "out of tree space in gettree");
                for (i = 0; i < 8; i++)
                        octkid(ot, i) = gettree();
                return(ot);
        case EOF:
                octerror(USER, "truncated octree");
        default:
                octerror(USER, "damaged octree");
        }
        return EMPTY; /* pro forma return */
}


static int
nonsurfinset(os)                        /* check set for modifier */
register OBJECT  *os;
{
        register OBJECT  s;
        register int  i;

        for (i = *os; i-- > 0; )
                if ((s = *++os) >= objorig && s < objorig+fnobjects &&
                                ismodifier(objptr(s)->otype))
                        return(1);
        return(0);
}


static void
skiptree(void)                          /* skip octree on input */
{
        register int  i;
        
        switch (getc(infp)) {
        case OT_EMPTY:
                return;
        case OT_FULL:
                for (i = ogetint(objsize)*objsize; i-- > 0; )
                        if (getc(infp) == EOF)
                                octerror(USER, "truncated octree");
                return;
        case OT_TREE:
                for (i = 0; i < 8; i++)
                        skiptree();
                return;
        case EOF:
                octerror(USER, "truncated octree");
        default:
                octerror(USER, "damaged octree");
        }
}


static void
octerror(etyp, msg)                     /* octree error */
int  etyp;
char  *msg;
{
        char  msgbuf[128];

        sprintf(msgbuf, "(%s): %s", infn, msg);
        error(etyp, msgbuf);
}
Revision:	2.24
Committed:	Mon Oct 27 10:19:31 2003 UTC (20 years, 6 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.23:	+2 -1 lines
Log Message:	Added gethomedir.c and various compatibility fixes.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.24	static const char RCSid[] = "$Id: readoct.c,v 2.23 2003/10/22 02:06:34 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* readoct.c - routines to read octree information.
6	greg	2.13	*/
7
8	greg	2.14	#include "copyright.h"
9	greg	1.1
10	schorsch	2.17	#include <stdio.h>
11	greg	2.19	#include <time.h>
12	schorsch	2.17
13	greg	2.23	#include "platform.h"
14	schorsch	2.24	#include "rtprocess.h"
15	greg	1.1	#include "standard.h"
16			#include "octree.h"
17			#include "object.h"
18			#include "otypes.h"
19	schorsch	2.17	#include "resolu.h"
20	greg	1.1
21	schorsch	2.20	static double ogetflt(void);
22			static long ogetint(int);
23			static char ogetstr(char );
24			static int nonsurfinset(OBJECT *);
25	schorsch	2.17	static void octerror(int etyp, char *msg);
26			static void skiptree(void);
27	schorsch	2.20	static OCTREE getfullnode(void), gettree(void);
28	greg	1.1
29	greg	2.13	static char infn; / input file specification */
30	greg	1.1	static FILE infp; / input file stream */
31	greg	1.14	static int objsize; /* size of stored OBJECT's */
32	greg	1.1	static OBJECT objorig; /* zeroeth object */
33	greg	2.12	static OBJECT fnobjects; /* number of objects in this file */
34	greg	1.1
35
36			int
37	greg	2.13	readoct(inpspec, load, scene, ofn) /* read in octree file or stream */
38			char *inpspec;
39	greg	1.1	int load;
40			CUBE *scene;
41			char *ofn[];
42			{
43	greg	1.11	char sbuf[512];
44	greg	1.1	int nf;
45	greg	2.15	int i;
46	greg	1.15	long m;
47	greg	1.1
48	greg	2.13	if (inpspec == NULL) {
49	greg	1.1	infn = "standard input";
50			infp = stdin;
51	greg	2.13	} else if (inpspec[0] == '!') {
52			infn = inpspec;
53			if ((infp = popen(inpspec+1, "r")) == NULL) {
54			sprintf(errmsg, "cannot execute \"%s\"", inpspec);
55			error(SYSTEM, errmsg);
56			}
57	greg	1.1	} else {
58	greg	2.13	infn = inpspec;
59			if ((infp = fopen(inpspec, "r")) == NULL) {
60	greg	1.1	sprintf(errmsg, "cannot open octree file \"%s\"",
61	greg	2.13	inpspec);
62	greg	1.1	error(SYSTEM, errmsg);
63			}
64			}
65	schorsch	2.16	SET_FILE_BINARY(infp);
66	greg	1.1	/* get header */
67	greg	2.11	if (checkheader(infp, OCTFMT, load&IO_INFO ? stdout : (FILE *)NULL) < 0)
68	greg	1.12	octerror(USER, "not an octree");
69	greg	1.1	/* check format */
70	greg	2.4	if ((objsize = ogetint(2)-OCTMAGIC) <= 0 \|\|
71	greg	1.14	objsize > MAXOBJSIZ \|\| objsize > sizeof(long))
72	greg	1.12	octerror(USER, "incompatible octree format");
73	greg	1.1	/* get boundaries */
74			if (load & IO_BOUNDS) {
75			for (i = 0; i < 3; i++)
76	greg	2.4	scene->cuorg[i] = atof(ogetstr(sbuf));
77			scene->cusize = atof(ogetstr(sbuf));
78	greg	1.1	} else {
79			for (i = 0; i < 4; i++)
80	greg	2.4	ogetstr(sbuf);
81	greg	1.1	}
82			objorig = nobjects; /* set object offset */
83			nf = 0; /* get object files */
84	greg	2.4	while (*ogetstr(sbuf)) {
85	greg	1.1	if (load & IO_SCENE)
86			readobj(sbuf);
87			if (load & IO_FILES)
88			ofn[nf] = savqstr(sbuf);
89			nf++;
90			}
91			if (load & IO_FILES)
92			ofn[nf] = NULL;
93	greg	1.8	/* get number of objects */
94	greg	2.4	fnobjects = m = ogetint(objsize);
95	greg	1.15	if (fnobjects != m)
96			octerror(USER, "too many objects");
97	greg	1.1
98	greg	2.13	if (load & IO_TREE) /* get the octree */
99	greg	1.1	scene->cutree = gettree();
100	greg	2.5	else if (load & IO_SCENE && nf == 0)
101			skiptree();
102
103	schorsch	2.21	if (load & IO_SCENE) { /* get the scene */
104	greg	2.5	if (nf == 0) {
105	greg	2.15	/* load binary scene data */
106			readscene(infp, objsize);
107
108	greg	2.5	} else { /* consistency checks */
109			/* check object count */
110			if (nobjects != objorig+fnobjects)
111			octerror(USER, "bad object count; octree stale?");
112			/* check for non-surfaces */
113	greg	2.12	if (dosets(nonsurfinset))
114	greg	2.5	octerror(USER, "modifier in tree; octree stale?");
115			}
116	schorsch	2.21	}
117	greg	2.13	/* close the input */
118			if (infn[0] == '!')
119			pclose(infp);
120			else
121			fclose(infp);
122	greg	1.1	return(nf);
123			}
124
125
126			static char *
127	greg	2.4	ogetstr(s) /* get null-terminated string */
128	greg	1.1	char *s;
129			{
130	greg	2.4	extern char *getstr();
131	greg	1.1
132	greg	2.4	if (getstr(s, infp) == NULL)
133			octerror(USER, "truncated octree");
134			return(s);
135	greg	1.1	}
136
137
138			static OCTREE
139			getfullnode() /* get a set, return fullnode */
140			{
141	greg	2.7	OBJECT set[MAXSET+1];
142	greg	1.1	register int i;
143	greg	1.14	register long m;
144	greg	1.1
145	greg	2.4	if ((set[0] = ogetint(objsize)) > MAXSET)
146	greg	1.1	octerror(USER, "bad set in getfullnode");
147	greg	1.14	for (i = 1; i <= set[0]; i++) {
148	greg	2.4	m = ogetint(objsize) + objorig;
149	greg	1.15	if ((set[i] = m) != m)
150	greg	1.14	octerror(USER, "too many objects");
151			}
152	greg	1.1	return(fullnode(set));
153			}
154
155
156			static long
157	greg	2.4	ogetint(siz) /* get a siz-byte integer */
158			int siz;
159	greg	1.1	{
160	greg	2.4	extern long getint();
161	greg	1.3	register long r;
162	greg	1.1
163	greg	2.4	r = getint(siz, infp);
164			if (feof(infp))
165			octerror(USER, "truncated octree");
166	greg	1.1	return(r);
167			}
168
169
170			static double
171	greg	2.4	ogetflt() /* get a floating point number */
172	greg	1.1	{
173	greg	2.4	extern double getflt();
174	greg	2.7	double r;
175	greg	1.1
176	greg	2.4	r = getflt(infp);
177			if (feof(infp))
178			octerror(USER, "truncated octree");
179			return(r);
180	greg	1.1	}
181
182
183			static OCTREE
184			gettree() /* get a pre-ordered octree */
185			{
186	greg	2.7	register OCTREE ot;
187	greg	1.1	register int i;
188
189			switch (getc(infp)) {
190			case OT_EMPTY:
191			return(EMPTY);
192			case OT_FULL:
193			return(getfullnode());
194			case OT_TREE:
195			if ((ot = octalloc()) == EMPTY)
196			octerror(SYSTEM, "out of tree space in gettree");
197			for (i = 0; i < 8; i++)
198			octkid(ot, i) = gettree();
199			return(ot);
200	greg	2.5	case EOF:
201			octerror(USER, "truncated octree");
202			default:
203			octerror(USER, "damaged octree");
204			}
205	greg	2.22	return EMPTY; /* pro forma return */
206	greg	2.12	}
207
208
209			static int
210			nonsurfinset(os) /* check set for modifier */
211			register OBJECT *os;
212			{
213			register OBJECT s;
214			register int i;
215
216			for (i = *os; i-- > 0; )
217			if ((s = *++os) >= objorig && s < objorig+fnobjects &&
218			ismodifier(objptr(s)->otype))
219			return(1);
220			return(0);
221	greg	2.5	}
222
223
224	schorsch	2.17	static void
225			skiptree(void) /* skip octree on input */
226	greg	2.5	{
227			register int i;
228
229			switch (getc(infp)) {
230			case OT_EMPTY:
231			return;
232			case OT_FULL:
233	greg	2.6	for (i = ogetint(objsize)*objsize; i-- > 0; )
234			if (getc(infp) == EOF)
235			octerror(USER, "truncated octree");
236	greg	2.5	return;
237			case OT_TREE:
238			for (i = 0; i < 8; i++)
239			skiptree();
240			return;
241	greg	1.1	case EOF:
242			octerror(USER, "truncated octree");
243			default:
244			octerror(USER, "damaged octree");
245			}
246			}
247
248
249	schorsch	2.17	static void
250	greg	1.1	octerror(etyp, msg) /* octree error */
251			int etyp;
252			char *msg;
253			{
254			char msgbuf[128];
255
256			sprintf(msgbuf, "(%s): %s", infn, msg);
257			error(etyp, msgbuf);
258			}