src/ot/obj2mesh.c

#ifndef lint
static const char RCSid[] = "$Id: obj2mesh.c,v 2.16 2021/07/28 22:16:43 greg Exp $";
#endif
/*
 *  Main program to compile a Wavefront .OBJ file into a Radiance mesh
 */

#include "copyright.h"
#include "paths.h"
#include "platform.h"
#include "standard.h"
#include "resolu.h"
#include "cvmesh.h"
#include "otypes.h"

extern int      o_face(); /* XXX should go to a header file */

int     o_default() { return(O_MISS); }

FUN  ofun[NUMOTYPE] = INIT_OTYPE;       /* needed for link resolution */

char  *progname;                        /* argv[0] */

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

int  objlim = 9;                        /* # of objects before split */

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

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

static void addface(CUBE  *cu, OBJECT   obj);
static void add2full(CUBE  *cu, OBJECT  obj);


int
main(           /* compile a .OBJ file into a mesh */
        int  argc,
        char  *argv[]
)
{
        int  verbose = 0;
        char  *cp;
        int  i, j;

        progname = argv[0];
        ofun[OBJ_FACE].funp = o_face;

        for (i = 1; i < argc && argv[i][0] == '-'; i++)
                switch (argv[i][1]) {
                case 'n':                               /* set limit */
                        objlim = atoi(argv[++i]);
                        break;
                case 'r':                               /* resolution limit */
                        resolu = atoi(argv[++i]);
                        break;
                case 'a':                               /* material file */
                        readobj(argv[++i]);
                        break;
                case 'l':                               /* library material */
                        cp = getpath(argv[++i], getrlibpath(), R_OK);
                        if (cp == NULL) {
                                sprintf(errmsg,
                                        "cannot find library material: '%s'",
                                                argv[i]);
                                error(SYSTEM, errmsg);
                        }
                        readobj(cp);
                        break;
                case 'w':                               /* supress warnings */
                        nowarn = 1;
                        break;
                case 'v':                               /* print mesh stats */
                        verbose = 1;
                        break;
                default:
                        sprintf(errmsg, "unknown option: '%s'", argv[i]);
                        error(USER, errmsg);
                        break;
                }

        if (i < argc-2)
                error(USER, "too many file arguments");
                                        /* initialize mesh */
        cvinit(i==argc-2 ? argv[i+1] : "<stdout>");
                                        /* read .OBJ file into triangles */
        if (i == argc)
                wfreadobj(NULL);
        else
                wfreadobj(argv[i]);
        
        cvmeshbounds();                 /* set octree boundaries */

        if (i == argc-2)                /* open output file */
                if (freopen(argv[i+1], "w", stdout) == NULL)
                        error(SYSTEM, "cannot open output file");
        SET_FILE_BINARY(stdout);
        newheader("RADIANCE", stdout);  /* new binary file header */
        printargs(i<argc ? i+1 : argc, argv, stdout);
        fputformat(MESHFMT, stdout);
        fputc('\n', stdout);

        mincusize = ourmesh->mcube.cusize / resolu - FTINY;

        for (i = 0; i < nobjects; i++)  /* add triangles to octree */
                if (objptr(i)->otype == OBJ_FACE)
                        addface(&ourmesh->mcube, i);

                                        /* optimize octree */
        ourmesh->mcube.cutree = combine(ourmesh->mcube.cutree);

        if (ourmesh->mcube.cutree == EMPTY)
                error(WARNING, "mesh is empty");
        
        cvmesh();                       /* convert mesh and leaf nodes */

        writemesh(ourmesh, stdout);     /* write mesh to output */
        
        if (verbose)
                printmeshstats(ourmesh, stderr);

        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;
}


static void
addface(                        /* add a face to a cube */
        CUBE  *cu,
        OBJECT  obj
)
{

        if (o_face(objptr(obj), cu) == O_MISS)
                return;

        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;
                        }
                        addface(&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);
}


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

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

        if (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");
                                        /* 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;
                }
                for (j = 1; j <= oset[0]; j++)
                        addface(&cukid, oset[j]);
                addface(&cukid, obj);
                                        /* returned node */
                octkid(ot, i) = cukid.cutree;
        }
        cu->cutree = ot;
}
Revision:	2.17
Committed:	Mon Feb 6 22:40:21 2023 UTC (14 months, 3 weeks ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R4, HEAD
Changes since 2.16:	+6 -6 lines
Log Message:	refactor: Changed some char* args to const char* to avoid warnings
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.17	static const char RCSid[] = "$Id: obj2mesh.c,v 2.16 2021/07/28 22:16:43 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* Main program to compile a Wavefront .OBJ file into a Radiance mesh
6			*/
7
8			#include "copyright.h"
9	greg	2.13	#include "paths.h"
10	schorsch	2.6	#include "platform.h"
11	greg	2.1	#include "standard.h"
12	schorsch	2.8	#include "resolu.h"
13	greg	2.1	#include "cvmesh.h"
14			#include "otypes.h"
15
16	schorsch	2.8	extern int o_face(); /* XXX should go to a header file */
17	greg	2.1
18			int o_default() { return(O_MISS); }
19
20			FUN ofun[NUMOTYPE] = INIT_OTYPE; /* needed for link resolution */
21
22			char progname; / argv[0] */
23
24			int nowarn = 0; /* supress warnings? */
25
26	greg	2.12	int objlim = 9; /* # of objects before split */
27	greg	2.1
28			int resolu = 16384; /* octree resolution limit */
29
30			double mincusize; /* minimum cube size from resolu */
31
32	schorsch	2.8	static void addface(CUBE *cu, OBJECT obj);
33			static void add2full(CUBE *cu, OBJECT obj);
34	greg	2.1
35	schorsch	2.8
36			int
37			main( /* compile a .OBJ file into a mesh */
38			int argc,
39			char *argv[]
40			)
41	greg	2.1	{
42	greg	2.15	int verbose = 0;
43	greg	2.11	char *cp;
44	greg	2.3	int i, j;
45	greg	2.1
46			progname = argv[0];
47			ofun[OBJ_FACE].funp = o_face;
48
49			for (i = 1; i < argc && argv[i][0] == '-'; i++)
50			switch (argv[i][1]) {
51			case 'n': /* set limit */
52			objlim = atoi(argv[++i]);
53			break;
54			case 'r': /* resolution limit */
55			resolu = atoi(argv[++i]);
56			break;
57	greg	2.3	case 'a': /* material file */
58	greg	2.16	readobj(argv[++i]);
59	greg	2.3	break;
60	greg	2.11	case 'l': /* library material */
61			cp = getpath(argv[++i], getrlibpath(), R_OK);
62			if (cp == NULL) {
63			sprintf(errmsg,
64			"cannot find library material: '%s'",
65			argv[i]);
66	greg	2.14	error(SYSTEM, errmsg);
67	greg	2.11	}
68	greg	2.16	readobj(cp);
69	greg	2.11	break;
70	greg	2.1	case 'w': /* supress warnings */
71			nowarn = 1;
72			break;
73	greg	2.15	case 'v': /* print mesh stats */
74			verbose = 1;
75			break;
76	greg	2.1	default:
77			sprintf(errmsg, "unknown option: '%s'", argv[i]);
78			error(USER, errmsg);
79			break;
80			}
81	greg	2.7
82			if (i < argc-2)
83			error(USER, "too many file arguments");
84	greg	2.1	/* initialize mesh */
85			cvinit(i==argc-2 ? argv[i+1] : "<stdout>");
86	greg	2.3	/* read .OBJ file into triangles */
87			if (i == argc)
88	greg	2.1	wfreadobj(NULL);
89			else
90			wfreadobj(argv[i]);
91
92			cvmeshbounds(); /* set octree boundaries */
93
94			if (i == argc-2) /* open output file */
95			if (freopen(argv[i+1], "w", stdout) == NULL)
96			error(SYSTEM, "cannot open output file");
97	schorsch	2.5	SET_FILE_BINARY(stdout);
98	greg	2.1	newheader("RADIANCE", stdout); /* new binary file header */
99			printargs(i<argc ? i+1 : argc, argv, stdout);
100			fputformat(MESHFMT, stdout);
101			fputc('\n', stdout);
102
103			mincusize = ourmesh->mcube.cusize / resolu - FTINY;
104
105			for (i = 0; i < nobjects; i++) /* add triangles to octree */
106	greg	2.3	if (objptr(i)->otype == OBJ_FACE)
107			addface(&ourmesh->mcube, i);
108	greg	2.1
109			/* optimize octree */
110			ourmesh->mcube.cutree = combine(ourmesh->mcube.cutree);
111
112			if (ourmesh->mcube.cutree == EMPTY)
113			error(WARNING, "mesh is empty");
114
115			cvmesh(); /* convert mesh and leaf nodes */
116
117			writemesh(ourmesh, stdout); /* write mesh to output */
118
119	greg	2.15	if (verbose)
120			printmeshstats(ourmesh, stderr);
121	greg	2.1
122			quit(0);
123	schorsch	2.8	return 0; /* pro forma return */
124	greg	2.1	}
125
126
127			void
128	schorsch	2.8	quit( /* exit program */
129			int code
130			)
131	greg	2.1	{
132			exit(code);
133			}
134
135
136			void
137	schorsch	2.8	cputs(void) /* interactive error */
138	greg	2.1	{
139			/* referenced, but not used */
140			}
141
142
143			void
144	schorsch	2.8	wputs( /* warning message */
145	greg	2.17	const char *s
146	schorsch	2.8	)
147	greg	2.1	{
148			if (!nowarn)
149			eputs(s);
150			}
151
152
153			void
154	schorsch	2.8	eputs( /* put string to stderr */
155	greg	2.17	const char *s
156	schorsch	2.8	)
157	greg	2.1	{
158			static int inln = 0;
159
160			if (!inln++) {
161			fputs(progname, stderr);
162			fputs(": ", stderr);
163			}
164			fputs(s, stderr);
165			if (*s && s[strlen(s)-1] == '\n')
166			inln = 0;
167			}
168
169
170	schorsch	2.8	static void
171			addface( /* add a face to a cube */
172	greg	2.17	CUBE *cu,
173	schorsch	2.8	OBJECT obj
174			)
175	greg	2.1	{
176
177			if (o_face(objptr(obj), cu) == O_MISS)
178			return;
179
180			if (istree(cu->cutree)) {
181	greg	2.2	CUBE cukid; /* do children */
182			int i, j;
183	greg	2.1	cukid.cusize = cu->cusize * 0.5;
184			for (i = 0; i < 8; i++) {
185			cukid.cutree = octkid(cu->cutree, i);
186			for (j = 0; j < 3; j++) {
187			cukid.cuorg[j] = cu->cuorg[j];
188			if ((1<<j) & i)
189			cukid.cuorg[j] += cukid.cusize;
190			}
191			addface(&cukid, obj);
192			octkid(cu->cutree, i) = cukid.cutree;
193			}
194			return;
195			}
196			if (isempty(cu->cutree)) {
197	greg	2.2	OBJECT oset[2]; /* singular set */
198	greg	2.1	oset[0] = 1; oset[1] = obj;
199			cu->cutree = fullnode(oset);
200			return;
201			}
202			/* add to full node */
203	greg	2.2	add2full(cu, obj);
204			}
205
206
207	schorsch	2.8	static void
208			add2full( /* add object to full node */
209	greg	2.17	CUBE *cu,
210	schorsch	2.8	OBJECT obj
211			)
212	greg	2.2	{
213			OCTREE ot;
214			OBJECT oset[MAXSET+1];
215			CUBE cukid;
216	greg	2.17	int i, j;
217	greg	2.2
218	greg	2.1	objset(oset, cu->cutree);
219			cukid.cusize = cu->cusize * 0.5;
220
221	greg	2.10	if (oset[0] < objlim \|\| cukid.cusize <
222	greg	2.9	(oset[0] < MAXSET ? mincusize : mincusize/256.0)) {
223	greg	2.1	/* add to set */
224			if (oset[0] >= MAXSET) {
225	greg	2.2	sprintf(errmsg, "set overflow in addobject (%s)",
226	greg	2.1	objptr(obj)->oname);
227			error(INTERNAL, errmsg);
228			}
229			insertelem(oset, obj);
230			cu->cutree = fullnode(oset);
231			return;
232			}
233			/* subdivide cube */
234			if ((ot = octalloc()) == EMPTY)
235			error(SYSTEM, "out of octree space");
236			/* assign subcubes */
237			for (i = 0; i < 8; i++) {
238			cukid.cutree = EMPTY;
239			for (j = 0; j < 3; j++) {
240			cukid.cuorg[j] = cu->cuorg[j];
241			if ((1<<j) & i)
242			cukid.cuorg[j] += cukid.cusize;
243			}
244			for (j = 1; j <= oset[0]; j++)
245			addface(&cukid, oset[j]);
246			addface(&cukid, obj);
247			/* returned node */
248			octkid(ot, i) = cukid.cutree;
249			}
250			cu->cutree = ot;
251			}