src/ot/obj2mesh.c

#ifndef lint
static const char RCSid[] = "$Id: obj2mesh.c,v 2.6 2003/06/08 12:03:10 schorsch Exp $";
#endif
/*
 *  Main program to compile a Wavefront .OBJ file into a Radiance mesh
 */

#include "copyright.h"
#include "platform.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;
                }

        if (i < argc-2)
                error(USER, "too many file arguments");
                                        /* 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:	2.7
Committed:	Mon Jul 14 05:00:45 2003 UTC (20 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.6:	+4 -1 lines
Log Message:	Added better command-line argument checking
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.7	static const char RCSid[] = "$Id: obj2mesh.c,v 2.6 2003/06/08 12:03:10 schorsch 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	schorsch	2.6	#include "platform.h"
10	greg	2.1	#include "standard.h"
11			#include "cvmesh.h"
12			#include "otypes.h"
13
14			extern int o_face();
15
16			int o_default() { return(O_MISS); }
17
18			FUN ofun[NUMOTYPE] = INIT_OTYPE; /* needed for link resolution */
19
20			char progname; / argv[0] */
21
22			int nowarn = 0; /* supress warnings? */
23
24			int objlim = 15; /* # of objects before split */
25
26			int resolu = 16384; /* octree resolution limit */
27
28			double mincusize; /* minimum cube size from resolu */
29
30
31			main(argc, argv) /* compile a .OBJ file into a mesh */
32			int argc;
33			char *argv[];
34			{
35	greg	2.3	int nmatf = 0;
36			char *matinp[32];
37			int i, j;
38	greg	2.1
39			progname = argv[0];
40			ofun[OBJ_FACE].funp = o_face;
41
42			for (i = 1; i < argc && argv[i][0] == '-'; i++)
43			switch (argv[i][1]) {
44			case 'n': /* set limit */
45			objlim = atoi(argv[++i]);
46			break;
47			case 'r': /* resolution limit */
48			resolu = atoi(argv[++i]);
49			break;
50	greg	2.3	case 'a': /* material file */
51			matinp[nmatf++] = argv[++i];
52			break;
53	greg	2.1	case 'w': /* supress warnings */
54			nowarn = 1;
55			break;
56			default:
57			sprintf(errmsg, "unknown option: '%s'", argv[i]);
58			error(USER, errmsg);
59			break;
60			}
61	greg	2.7
62			if (i < argc-2)
63			error(USER, "too many file arguments");
64	greg	2.1	/* initialize mesh */
65			cvinit(i==argc-2 ? argv[i+1] : "<stdout>");
66	greg	2.3	/* load material input */
67			for (j = 0; j < nmatf; j++)
68			readobj(matinp[j]);
69			/* read .OBJ file into triangles */
70			if (i == argc)
71	greg	2.1	wfreadobj(NULL);
72			else
73			wfreadobj(argv[i]);
74
75			cvmeshbounds(); /* set octree boundaries */
76
77			if (i == argc-2) /* open output file */
78			if (freopen(argv[i+1], "w", stdout) == NULL)
79			error(SYSTEM, "cannot open output file");
80	schorsch	2.5	SET_FILE_BINARY(stdout);
81	greg	2.1	newheader("RADIANCE", stdout); /* new binary file header */
82			printargs(i<argc ? i+1 : argc, argv, stdout);
83			fputformat(MESHFMT, stdout);
84			fputc('\n', stdout);
85
86			mincusize = ourmesh->mcube.cusize / resolu - FTINY;
87
88			for (i = 0; i < nobjects; i++) /* add triangles to octree */
89	greg	2.3	if (objptr(i)->otype == OBJ_FACE)
90			addface(&ourmesh->mcube, i);
91	greg	2.1
92			/* optimize octree */
93			ourmesh->mcube.cutree = combine(ourmesh->mcube.cutree);
94
95			if (ourmesh->mcube.cutree == EMPTY)
96			error(WARNING, "mesh is empty");
97
98			cvmesh(); /* convert mesh and leaf nodes */
99
100			writemesh(ourmesh, stdout); /* write mesh to output */
101
102	greg	2.4	/* printmeshstats(ourmesh, stderr); */
103	greg	2.1
104			quit(0);
105			}
106
107
108			void
109			quit(code) /* exit program */
110			int code;
111			{
112			exit(code);
113			}
114
115
116			void
117			cputs() /* interactive error */
118			{
119			/* referenced, but not used */
120			}
121
122
123			void
124			wputs(s) /* warning message */
125			char *s;
126			{
127			if (!nowarn)
128			eputs(s);
129			}
130
131
132			void
133			eputs(s) /* put string to stderr */
134			register char *s;
135			{
136			static int inln = 0;
137
138			if (!inln++) {
139			fputs(progname, stderr);
140			fputs(": ", stderr);
141			}
142			fputs(s, stderr);
143			if (*s && s[strlen(s)-1] == '\n')
144			inln = 0;
145			}
146
147
148			addface(cu, obj) /* add a face to a cube */
149			register CUBE *cu;
150			OBJECT obj;
151			{
152
153			if (o_face(objptr(obj), cu) == O_MISS)
154			return;
155
156			if (istree(cu->cutree)) {
157	greg	2.2	CUBE cukid; /* do children */
158			int i, j;
159	greg	2.1	cukid.cusize = cu->cusize * 0.5;
160			for (i = 0; i < 8; i++) {
161			cukid.cutree = octkid(cu->cutree, i);
162			for (j = 0; j < 3; j++) {
163			cukid.cuorg[j] = cu->cuorg[j];
164			if ((1<<j) & i)
165			cukid.cuorg[j] += cukid.cusize;
166			}
167			addface(&cukid, obj);
168			octkid(cu->cutree, i) = cukid.cutree;
169			}
170			return;
171			}
172			if (isempty(cu->cutree)) {
173	greg	2.2	OBJECT oset[2]; /* singular set */
174	greg	2.1	oset[0] = 1; oset[1] = obj;
175			cu->cutree = fullnode(oset);
176			return;
177			}
178			/* add to full node */
179	greg	2.2	add2full(cu, obj);
180			}
181
182
183			add2full(cu, obj) /* add object to full node */
184			register CUBE *cu;
185			OBJECT obj;
186			{
187			OCTREE ot;
188			OBJECT oset[MAXSET+1];
189			CUBE cukid;
190			register int i, j;
191
192	greg	2.1	objset(oset, cu->cutree);
193			cukid.cusize = cu->cusize * 0.5;
194
195			if (oset[0] < objlim \|\| cukid.cusize < mincusize) {
196			/* add to set */
197			if (oset[0] >= MAXSET) {
198	greg	2.2	sprintf(errmsg, "set overflow in addobject (%s)",
199	greg	2.1	objptr(obj)->oname);
200			error(INTERNAL, errmsg);
201			}
202			insertelem(oset, obj);
203			cu->cutree = fullnode(oset);
204			return;
205			}
206			/* subdivide cube */
207			if ((ot = octalloc()) == EMPTY)
208			error(SYSTEM, "out of octree space");
209			/* assign subcubes */
210			for (i = 0; i < 8; i++) {
211			cukid.cutree = EMPTY;
212			for (j = 0; j < 3; j++) {
213			cukid.cuorg[j] = cu->cuorg[j];
214			if ((1<<j) & i)
215			cukid.cuorg[j] += cukid.cusize;
216			}
217			for (j = 1; j <= oset[0]; j++)
218			addface(&cukid, oset[j]);
219			addface(&cukid, obj);
220			/* returned node */
221			octkid(ot, i) = cukid.cutree;
222			}
223			cu->cutree = ot;
224			}