src/ot/obj2mesh.c

#ifndef lint
static const char RCSid[] = "$Id: obj2mesh.c,v 2.5 2003/06/05 19:29:34 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;
                }
                                        /* 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:	2.6
Committed:	Sun Jun 8 12:03:10 2003 UTC (21 years, 5 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.5:	+2 -1 lines
Log Message:	Reduced compile warnings/errors on Windows.
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	schorsch	2.6	static const char RCSid[] = "$Id: obj2mesh.c,v 2.5 2003/06/05 19:29:34 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			/* initialize mesh */
62			cvinit(i==argc-2 ? argv[i+1] : "<stdout>");
63	greg	2.3	/* load material input */
64			for (j = 0; j < nmatf; j++)
65			readobj(matinp[j]);
66			/* read .OBJ file into triangles */
67			if (i == argc)
68	greg	2.1	wfreadobj(NULL);
69			else
70			wfreadobj(argv[i]);
71
72			cvmeshbounds(); /* set octree boundaries */
73
74			if (i == argc-2) /* open output file */
75			if (freopen(argv[i+1], "w", stdout) == NULL)
76			error(SYSTEM, "cannot open output file");
77	schorsch	2.5	SET_FILE_BINARY(stdout);
78	greg	2.1	newheader("RADIANCE", stdout); /* new binary file header */
79			printargs(i<argc ? i+1 : argc, argv, stdout);
80			fputformat(MESHFMT, stdout);
81			fputc('\n', stdout);
82
83			mincusize = ourmesh->mcube.cusize / resolu - FTINY;
84
85			for (i = 0; i < nobjects; i++) /* add triangles to octree */
86	greg	2.3	if (objptr(i)->otype == OBJ_FACE)
87			addface(&ourmesh->mcube, i);
88	greg	2.1
89			/* optimize octree */
90			ourmesh->mcube.cutree = combine(ourmesh->mcube.cutree);
91
92			if (ourmesh->mcube.cutree == EMPTY)
93			error(WARNING, "mesh is empty");
94
95			cvmesh(); /* convert mesh and leaf nodes */
96
97			writemesh(ourmesh, stdout); /* write mesh to output */
98
99	greg	2.4	/* printmeshstats(ourmesh, stderr); */
100	greg	2.1
101			quit(0);
102			}
103
104
105			void
106			quit(code) /* exit program */
107			int code;
108			{
109			exit(code);
110			}
111
112
113			void
114			cputs() /* interactive error */
115			{
116			/* referenced, but not used */
117			}
118
119
120			void
121			wputs(s) /* warning message */
122			char *s;
123			{
124			if (!nowarn)
125			eputs(s);
126			}
127
128
129			void
130			eputs(s) /* put string to stderr */
131			register char *s;
132			{
133			static int inln = 0;
134
135			if (!inln++) {
136			fputs(progname, stderr);
137			fputs(": ", stderr);
138			}
139			fputs(s, stderr);
140			if (*s && s[strlen(s)-1] == '\n')
141			inln = 0;
142			}
143
144
145			addface(cu, obj) /* add a face to a cube */
146			register CUBE *cu;
147			OBJECT obj;
148			{
149
150			if (o_face(objptr(obj), cu) == O_MISS)
151			return;
152
153			if (istree(cu->cutree)) {
154	greg	2.2	CUBE cukid; /* do children */
155			int i, j;
156	greg	2.1	cukid.cusize = cu->cusize * 0.5;
157			for (i = 0; i < 8; i++) {
158			cukid.cutree = octkid(cu->cutree, i);
159			for (j = 0; j < 3; j++) {
160			cukid.cuorg[j] = cu->cuorg[j];
161			if ((1<<j) & i)
162			cukid.cuorg[j] += cukid.cusize;
163			}
164			addface(&cukid, obj);
165			octkid(cu->cutree, i) = cukid.cutree;
166			}
167			return;
168			}
169			if (isempty(cu->cutree)) {
170	greg	2.2	OBJECT oset[2]; /* singular set */
171	greg	2.1	oset[0] = 1; oset[1] = obj;
172			cu->cutree = fullnode(oset);
173			return;
174			}
175			/* add to full node */
176	greg	2.2	add2full(cu, obj);
177			}
178
179
180			add2full(cu, obj) /* add object to full node */
181			register CUBE *cu;
182			OBJECT obj;
183			{
184			OCTREE ot;
185			OBJECT oset[MAXSET+1];
186			CUBE cukid;
187			register int i, j;
188
189	greg	2.1	objset(oset, cu->cutree);
190			cukid.cusize = cu->cusize * 0.5;
191
192			if (oset[0] < objlim \|\| cukid.cusize < mincusize) {
193			/* add to set */
194			if (oset[0] >= MAXSET) {
195	greg	2.2	sprintf(errmsg, "set overflow in addobject (%s)",
196	greg	2.1	objptr(obj)->oname);
197			error(INTERNAL, errmsg);
198			}
199			insertelem(oset, obj);
200			cu->cutree = fullnode(oset);
201			return;
202			}
203			/* subdivide cube */
204			if ((ot = octalloc()) == EMPTY)
205			error(SYSTEM, "out of octree space");
206			/* assign subcubes */
207			for (i = 0; i < 8; i++) {
208			cukid.cutree = EMPTY;
209			for (j = 0; j < 3; j++) {
210			cukid.cuorg[j] = cu->cuorg[j];
211			if ((1<<j) & i)
212			cukid.cuorg[j] += cukid.cusize;
213			}
214			for (j = 1; j <= oset[0]; j++)
215			addface(&cukid, oset[j]);
216			addface(&cukid, obj);
217			/* returned node */
218			octkid(ot, i) = cukid.cutree;
219			}
220			cu->cutree = ot;
221			}