src/ot/obj2mesh.c

#ifndef lint
static const char RCSid[] = "$Id: obj2mesh.c,v 2.4 2003/04/18 21:47:45 greg Exp $";
#endif
/*
 *  Main program to compile a Wavefront .OBJ file into a Radiance mesh
 */

#include "copyright.h"
#include "standard.h"
#include "cvmesh.h"
#include "otypes.h"

extern int      o_face();

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 = 15;                       /* # of objects before split */

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

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


main(argc, argv)                /* compile a .OBJ file into a mesh */
int  argc;
char  *argv[];
{
        int  nmatf = 0;
        char  *matinp[32];
        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 */
                        matinp[nmatf++] = argv[++i];
                        break;
                case 'w':                               /* supress warnings */
                        nowarn = 1;
                        break;
                default:
                        sprintf(errmsg, "unknown option: '%s'", argv[i]);
                        error(USER, errmsg);
                        break;
                }
                                        /* initialize mesh */
        cvinit(i==argc-2 ? argv[i+1] : "<stdout>");
                                        /* load material input */
        for (j = 0; j < nmatf; j++)
                readobj(matinp[j]);
                                        /* 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 */
        
        /* printmeshstats(ourmesh, stderr); */

        quit(0);
}


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


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


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


void
eputs(s)                                /* put string to stderr */
register 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;
}


addface(cu, obj)                        /* add a face to a cube */
register 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);
}


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

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

        if (oset[0] < objlim || cukid.cusize < mincusize) {
                                                /* 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:	2.5
Committed:	Thu Jun 5 19:29:34 2003 UTC (22 years, 4 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.4:	+2 -4 lines
Log Message:	Macros for setting binary file mode. Replacing MSDOS by _WIN32.
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	schorsch	2.5	static const char RCSid[] = "$Id: obj2mesh.c,v 2.4 2003/04/18 21:47:45 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			#include "standard.h"
10			#include "cvmesh.h"
11			#include "otypes.h"
12
13			extern int o_face();
14
15			int o_default() { return(O_MISS); }
16
17			FUN ofun[NUMOTYPE] = INIT_OTYPE; /* needed for link resolution */
18
19			char progname; / argv[0] */
20
21			int nowarn = 0; /* supress warnings? */
22
23			int objlim = 15; /* # of objects before split */
24
25			int resolu = 16384; /* octree resolution limit */
26
27			double mincusize; /* minimum cube size from resolu */
28
29
30			main(argc, argv) /* compile a .OBJ file into a mesh */
31			int argc;
32			char *argv[];
33			{
34	greg	2.3	int nmatf = 0;
35			char *matinp[32];
36			int i, j;
37	greg	2.1
38			progname = argv[0];
39			ofun[OBJ_FACE].funp = o_face;
40
41			for (i = 1; i < argc && argv[i][0] == '-'; i++)
42			switch (argv[i][1]) {
43			case 'n': /* set limit */
44			objlim = atoi(argv[++i]);
45			break;
46			case 'r': /* resolution limit */
47			resolu = atoi(argv[++i]);
48			break;
49	greg	2.3	case 'a': /* material file */
50			matinp[nmatf++] = argv[++i];
51			break;
52	greg	2.1	case 'w': /* supress warnings */
53			nowarn = 1;
54			break;
55			default:
56			sprintf(errmsg, "unknown option: '%s'", argv[i]);
57			error(USER, errmsg);
58			break;
59			}
60			/* initialize mesh */
61			cvinit(i==argc-2 ? argv[i+1] : "<stdout>");
62	greg	2.3	/* load material input */
63			for (j = 0; j < nmatf; j++)
64			readobj(matinp[j]);
65			/* read .OBJ file into triangles */
66			if (i == argc)
67	greg	2.1	wfreadobj(NULL);
68			else
69			wfreadobj(argv[i]);
70
71			cvmeshbounds(); /* set octree boundaries */
72
73			if (i == argc-2) /* open output file */
74			if (freopen(argv[i+1], "w", stdout) == NULL)
75			error(SYSTEM, "cannot open output file");
76	schorsch	2.5	SET_FILE_BINARY(stdout);
77	greg	2.1	newheader("RADIANCE", stdout); /* new binary file header */
78			printargs(i<argc ? i+1 : argc, argv, stdout);
79			fputformat(MESHFMT, stdout);
80			fputc('\n', stdout);
81
82			mincusize = ourmesh->mcube.cusize / resolu - FTINY;
83
84			for (i = 0; i < nobjects; i++) /* add triangles to octree */
85	greg	2.3	if (objptr(i)->otype == OBJ_FACE)
86			addface(&ourmesh->mcube, i);
87	greg	2.1
88			/* optimize octree */
89			ourmesh->mcube.cutree = combine(ourmesh->mcube.cutree);
90
91			if (ourmesh->mcube.cutree == EMPTY)
92			error(WARNING, "mesh is empty");
93
94			cvmesh(); /* convert mesh and leaf nodes */
95
96			writemesh(ourmesh, stdout); /* write mesh to output */
97
98	greg	2.4	/* printmeshstats(ourmesh, stderr); */
99	greg	2.1
100			quit(0);
101			}
102
103
104			void
105			quit(code) /* exit program */
106			int code;
107			{
108			exit(code);
109			}
110
111
112			void
113			cputs() /* interactive error */
114			{
115			/* referenced, but not used */
116			}
117
118
119			void
120			wputs(s) /* warning message */
121			char *s;
122			{
123			if (!nowarn)
124			eputs(s);
125			}
126
127
128			void
129			eputs(s) /* put string to stderr */
130			register char *s;
131			{
132			static int inln = 0;
133
134			if (!inln++) {
135			fputs(progname, stderr);
136			fputs(": ", stderr);
137			}
138			fputs(s, stderr);
139			if (*s && s[strlen(s)-1] == '\n')
140			inln = 0;
141			}
142
143
144			addface(cu, obj) /* add a face to a cube */
145			register CUBE *cu;
146			OBJECT obj;
147			{
148
149			if (o_face(objptr(obj), cu) == O_MISS)
150			return;
151
152			if (istree(cu->cutree)) {
153	greg	2.2	CUBE cukid; /* do children */
154			int i, j;
155	greg	2.1	cukid.cusize = cu->cusize * 0.5;
156			for (i = 0; i < 8; i++) {
157			cukid.cutree = octkid(cu->cutree, i);
158			for (j = 0; j < 3; j++) {
159			cukid.cuorg[j] = cu->cuorg[j];
160			if ((1<<j) & i)
161			cukid.cuorg[j] += cukid.cusize;
162			}
163			addface(&cukid, obj);
164			octkid(cu->cutree, i) = cukid.cutree;
165			}
166			return;
167			}
168			if (isempty(cu->cutree)) {
169	greg	2.2	OBJECT oset[2]; /* singular set */
170	greg	2.1	oset[0] = 1; oset[1] = obj;
171			cu->cutree = fullnode(oset);
172			return;
173			}
174			/* add to full node */
175	greg	2.2	add2full(cu, obj);
176			}
177
178
179			add2full(cu, obj) /* add object to full node */
180			register CUBE *cu;
181			OBJECT obj;
182			{
183			OCTREE ot;
184			OBJECT oset[MAXSET+1];
185			CUBE cukid;
186			register int i, j;
187
188	greg	2.1	objset(oset, cu->cutree);
189			cukid.cusize = cu->cusize * 0.5;
190
191			if (oset[0] < objlim \|\| cukid.cusize < mincusize) {
192			/* add to set */
193			if (oset[0] >= MAXSET) {
194	greg	2.2	sprintf(errmsg, "set overflow in addobject (%s)",
195	greg	2.1	objptr(obj)->oname);
196			error(INTERNAL, errmsg);
197			}
198			insertelem(oset, obj);
199			cu->cutree = fullnode(oset);
200			return;
201			}
202			/* subdivide cube */
203			if ((ot = octalloc()) == EMPTY)
204			error(SYSTEM, "out of octree space");
205			/* assign subcubes */
206			for (i = 0; i < 8; i++) {
207			cukid.cutree = EMPTY;
208			for (j = 0; j < 3; j++) {
209			cukid.cuorg[j] = cu->cuorg[j];
210			if ((1<<j) & i)
211			cukid.cuorg[j] += cukid.cusize;
212			}
213			for (j = 1; j <= oset[0]; j++)
214			addface(&cukid, oset[j]);
215			addface(&cukid, obj);
216			/* returned node */
217			octkid(ot, i) = cukid.cutree;
218			}
219			cu->cutree = ot;
220			}