src/ot/obj2mesh.c

#ifndef lint
static const char RCSid[] = "$Id: obj2mesh.c,v 2.11 2004/04/23 00:56:27 greg Exp $";
#endif
/*
 *  Main program to compile a Wavefront .OBJ file into a Radiance mesh
 */

#include "copyright.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  nmatf = 0;
        char  pathnames[12800];
        char  *pns = pathnames;
        char  *matinp[128];
        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 */
                        matinp[nmatf++] = 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(USER, errmsg);
                        }
                        matinp[nmatf++] = strcpy(pns, cp);
                        while (*pns++)
                                ;
                        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);
        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 */
        char  *s
)
{
        if (!nowarn)
                eputs(s);
}


void
eputs(                          /* 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;
}


static void
addface(                        /* 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);
}


static void
add2full(                       /* 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 <
                        (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:	2.12
Committed:	Thu Jul 12 14:58:53 2007 UTC (17 years, 3 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R9
Changes since 2.11:	+2 -2 lines
Log Message:	Decreased default -n setting in obj2mesh from 15 to 9
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.12	static const char RCSid[] = "$Id: obj2mesh.c,v 2.11 2004/04/23 00:56:27 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	schorsch	2.6	#include "platform.h"
10	greg	2.1	#include "standard.h"
11	schorsch	2.8	#include "resolu.h"
12	greg	2.1	#include "cvmesh.h"
13			#include "otypes.h"
14
15	schorsch	2.8	extern int o_face(); /* XXX should go to a header file */
16	greg	2.1
17			int o_default() { return(O_MISS); }
18
19			FUN ofun[NUMOTYPE] = INIT_OTYPE; /* needed for link resolution */
20
21			char progname; / argv[0] */
22
23			int nowarn = 0; /* supress warnings? */
24
25	greg	2.12	int objlim = 9; /* # of objects before split */
26	greg	2.1
27			int resolu = 16384; /* octree resolution limit */
28
29			double mincusize; /* minimum cube size from resolu */
30
31	schorsch	2.8	static void addface(CUBE *cu, OBJECT obj);
32			static void add2full(CUBE *cu, OBJECT obj);
33	greg	2.1
34	schorsch	2.8
35			int
36			main( /* compile a .OBJ file into a mesh */
37			int argc,
38			char *argv[]
39			)
40	greg	2.1	{
41	greg	2.3	int nmatf = 0;
42	greg	2.11	char pathnames[12800];
43			char *pns = pathnames;
44			char *matinp[128];
45			char *cp;
46	greg	2.3	int i, j;
47	greg	2.1
48			progname = argv[0];
49			ofun[OBJ_FACE].funp = o_face;
50
51			for (i = 1; i < argc && argv[i][0] == '-'; i++)
52			switch (argv[i][1]) {
53			case 'n': /* set limit */
54			objlim = atoi(argv[++i]);
55			break;
56			case 'r': /* resolution limit */
57			resolu = atoi(argv[++i]);
58			break;
59	greg	2.3	case 'a': /* material file */
60			matinp[nmatf++] = argv[++i];
61			break;
62	greg	2.11	case 'l': /* library material */
63			cp = getpath(argv[++i], getrlibpath(), R_OK);
64			if (cp == NULL) {
65			sprintf(errmsg,
66			"cannot find library material: '%s'",
67			argv[i]);
68			error(USER, errmsg);
69			}
70			matinp[nmatf++] = strcpy(pns, cp);
71			while (*pns++)
72			;
73			break;
74	greg	2.1	case 'w': /* supress warnings */
75			nowarn = 1;
76			break;
77			default:
78			sprintf(errmsg, "unknown option: '%s'", argv[i]);
79			error(USER, errmsg);
80			break;
81			}
82	greg	2.7
83			if (i < argc-2)
84			error(USER, "too many file arguments");
85	greg	2.1	/* initialize mesh */
86			cvinit(i==argc-2 ? argv[i+1] : "<stdout>");
87	greg	2.3	/* load material input */
88			for (j = 0; j < nmatf; j++)
89			readobj(matinp[j]);
90			/* read .OBJ file into triangles */
91			if (i == argc)
92	greg	2.1	wfreadobj(NULL);
93			else
94			wfreadobj(argv[i]);
95
96			cvmeshbounds(); /* set octree boundaries */
97
98			if (i == argc-2) /* open output file */
99			if (freopen(argv[i+1], "w", stdout) == NULL)
100			error(SYSTEM, "cannot open output file");
101	schorsch	2.5	SET_FILE_BINARY(stdout);
102	greg	2.1	newheader("RADIANCE", stdout); /* new binary file header */
103			printargs(i<argc ? i+1 : argc, argv, stdout);
104			fputformat(MESHFMT, stdout);
105			fputc('\n', stdout);
106
107			mincusize = ourmesh->mcube.cusize / resolu - FTINY;
108
109			for (i = 0; i < nobjects; i++) /* add triangles to octree */
110	greg	2.3	if (objptr(i)->otype == OBJ_FACE)
111			addface(&ourmesh->mcube, i);
112	greg	2.1
113			/* optimize octree */
114			ourmesh->mcube.cutree = combine(ourmesh->mcube.cutree);
115
116			if (ourmesh->mcube.cutree == EMPTY)
117			error(WARNING, "mesh is empty");
118
119			cvmesh(); /* convert mesh and leaf nodes */
120
121			writemesh(ourmesh, stdout); /* write mesh to output */
122
123	greg	2.4	/* printmeshstats(ourmesh, stderr); */
124	greg	2.1
125			quit(0);
126	schorsch	2.8	return 0; /* pro forma return */
127	greg	2.1	}
128
129
130			void
131	schorsch	2.8	quit( /* exit program */
132			int code
133			)
134	greg	2.1	{
135			exit(code);
136			}
137
138
139			void
140	schorsch	2.8	cputs(void) /* interactive error */
141	greg	2.1	{
142			/* referenced, but not used */
143			}
144
145
146			void
147	schorsch	2.8	wputs( /* warning message */
148			char *s
149			)
150	greg	2.1	{
151			if (!nowarn)
152			eputs(s);
153			}
154
155
156			void
157	schorsch	2.8	eputs( /* put string to stderr */
158			register char *s
159			)
160	greg	2.1	{
161			static int inln = 0;
162
163			if (!inln++) {
164			fputs(progname, stderr);
165			fputs(": ", stderr);
166			}
167			fputs(s, stderr);
168			if (*s && s[strlen(s)-1] == '\n')
169			inln = 0;
170			}
171
172
173	schorsch	2.8	static void
174			addface( /* add a face to a cube */
175			register CUBE *cu,
176			OBJECT obj
177			)
178	greg	2.1	{
179
180			if (o_face(objptr(obj), cu) == O_MISS)
181			return;
182
183			if (istree(cu->cutree)) {
184	greg	2.2	CUBE cukid; /* do children */
185			int i, j;
186	greg	2.1	cukid.cusize = cu->cusize * 0.5;
187			for (i = 0; i < 8; i++) {
188			cukid.cutree = octkid(cu->cutree, i);
189			for (j = 0; j < 3; j++) {
190			cukid.cuorg[j] = cu->cuorg[j];
191			if ((1<<j) & i)
192			cukid.cuorg[j] += cukid.cusize;
193			}
194			addface(&cukid, obj);
195			octkid(cu->cutree, i) = cukid.cutree;
196			}
197			return;
198			}
199			if (isempty(cu->cutree)) {
200	greg	2.2	OBJECT oset[2]; /* singular set */
201	greg	2.1	oset[0] = 1; oset[1] = obj;
202			cu->cutree = fullnode(oset);
203			return;
204			}
205			/* add to full node */
206	greg	2.2	add2full(cu, obj);
207			}
208
209
210	schorsch	2.8	static void
211			add2full( /* add object to full node */
212			register CUBE *cu,
213			OBJECT obj
214			)
215	greg	2.2	{
216			OCTREE ot;
217			OBJECT oset[MAXSET+1];
218			CUBE cukid;
219			register int i, j;
220
221	greg	2.1	objset(oset, cu->cutree);
222			cukid.cusize = cu->cusize * 0.5;
223
224	greg	2.10	if (oset[0] < objlim \|\| cukid.cusize <
225	greg	2.9	(oset[0] < MAXSET ? mincusize : mincusize/256.0)) {
226	greg	2.1	/* add to set */
227			if (oset[0] >= MAXSET) {
228	greg	2.2	sprintf(errmsg, "set overflow in addobject (%s)",
229	greg	2.1	objptr(obj)->oname);
230			error(INTERNAL, errmsg);
231			}
232			insertelem(oset, obj);
233			cu->cutree = fullnode(oset);
234			return;
235			}
236			/* subdivide cube */
237			if ((ot = octalloc()) == EMPTY)
238			error(SYSTEM, "out of octree space");
239			/* assign subcubes */
240			for (i = 0; i < 8; i++) {
241			cukid.cutree = EMPTY;
242			for (j = 0; j < 3; j++) {
243			cukid.cuorg[j] = cu->cuorg[j];
244			if ((1<<j) & i)
245			cukid.cuorg[j] += cukid.cusize;
246			}
247			for (j = 1; j <= oset[0]; j++)
248			addface(&cukid, oset[j]);
249			addface(&cukid, obj);
250			/* returned node */
251			octkid(ot, i) = cukid.cutree;
252			}
253			cu->cutree = ot;
254			}