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#include "copyright.h" |
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#include "standard.h" |
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#include "cvmesh.h" |
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#include "triangulate.h" |
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#include <ctype.h> |
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typedef int VNDX[3]; /* vertex index (point,map,normal) */ |
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#define CHUNKSIZ 1024 /* vertex allocation chunk size */ |
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|
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#define MAXARG 64 /* maximum # arguments in a statement */ |
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#define MAXARG 512 /* maximum # arguments in a statement */ |
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static FVECT *vlist; /* our vertex list */ |
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static int nvs; /* number of vertices in our list */ |
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static char *inpfile; /* input file name */ |
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static int havemats; /* materials available? */ |
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static char material[64]; /* current material name */ |
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static char group[64]; /* current group name */ |
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static char material[256]; /* current material name */ |
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static char group[256]; /* current group name */ |
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static int lineno; /* current line number */ |
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static int faceno; /* current face number */ |
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|
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static int |
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getstmt( /* read the next statement from fp */ |
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register char *av[MAXARG], |
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char *av[MAXARG], |
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FILE *fp |
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) |
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{ |
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static char sbuf[MAXARG*16]; |
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register char *cp; |
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register int i; |
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char *cp; |
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> |
int i; |
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|
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do { |
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if (fgetline(cp=sbuf, sizeof(sbuf), fp) == NULL) |
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lineno++; |
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*cp++ = '\0'; |
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} |
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if (!*cp || i >= MAXARG-1) |
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> |
if (!*cp) |
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break; |
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if (i >= MAXARG-1) { |
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sprintf(errmsg, |
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"%s: too many arguments near line %d (limit %d)\n", |
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inpfile, lineno+1, MAXARG-1); |
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break; |
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} |
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av[i++] = cp; |
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while (*++cp && !isspace(*cp)) |
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; |
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|
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static int |
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cvtndx( /* convert vertex string to index */ |
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register VNDX vi, |
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< |
register char *vs |
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> |
VNDX vi, |
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> |
char *vs |
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) |
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{ |
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/* get point */ |
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return(1); |
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} |
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|
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/* determine dominant axis for triangle */ |
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static int |
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+ |
dominant_axis(char *v1, char *v2, char *v3) |
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{ |
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int v1i = atoi(v1), v2i = atoi(v2), v3i = atoi(v3); |
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FVECT e1, e2, vn; |
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int i, imax; |
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|
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VSUB(e1, vlist[v2i], vlist[v1i]); |
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VSUB(e2, vlist[v3i], vlist[v2i]); |
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VCROSS(vn, e1, e2); |
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for (i = imax = 2; i--; ) |
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if (vn[i]*vn[i] > vn[imax]*vn[imax]) |
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imax = i; |
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return(vn[imax]*vn[imax] > FTINY ? imax : -1); |
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} |
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|
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/* callback for triangle output from polygon */ |
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static int |
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tri_out(const Vert2_list *tp, int a, int b, int c) |
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{ |
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return( puttri( ((char **)tp->p)[a], |
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((char **)tp->p)[b], |
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((char **)tp->p)[c] ) ); |
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} |
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|
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static int |
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putface( /* put out an N-sided polygon */ |
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int ac, |
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< |
register char **av |
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> |
char **av |
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) |
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{ |
| 280 |
< |
char *cp; |
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< |
register int i; |
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> |
Vert2_list *poly = polyAlloc(ac); |
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> |
int i, ax, ay; |
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|
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< |
while (ac > 3) { /* break into triangles */ |
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< |
if (!puttri(av[0], av[1], av[2])) |
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> |
if (poly == NULL) |
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> |
return(0); |
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> |
poly->p = (void *)av; |
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> |
for (i = ac-3; i >= 0; i--) /* identify dominant axis */ |
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> |
if ((ax = dominant_axis(av[i], av[i+1], av[i+2])) >= 0) |
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> |
break; |
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> |
if (ax < 0) |
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> |
return(0); |
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> |
if (++ax >= 3) ax = 0; |
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> |
ay = ax; |
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> |
if (++ay >= 3) ay = 0; |
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> |
for (i = 0; i < ac; i++) { /* convert to 2-D polygon */ |
| 295 |
> |
VNDX vi; |
| 296 |
> |
if (!cvtndx(vi, av[i])) { |
| 297 |
> |
error(WARNING, "bad vertex reference"); |
| 298 |
> |
polyFree(poly); |
| 299 |
|
return(0); |
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< |
ac--; /* remove vertex & rotate */ |
| 301 |
< |
cp = av[0]; |
| 302 |
< |
for (i = 0; i < ac-1; i++) |
| 257 |
< |
av[i] = av[i+2]; |
| 258 |
< |
av[i] = cp; |
| 300 |
> |
} |
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> |
poly->v[i].mX = vlist[vi[0]][ax]; |
| 302 |
> |
poly->v[i].mY = vlist[vi[0]][ay]; |
| 303 |
|
} |
| 304 |
< |
return(puttri(av[0], av[1], av[2])); |
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> |
/* break into triangles & output */ |
| 305 |
> |
if (!polyTriangulate(poly, &tri_out)) |
| 306 |
> |
return(0); |
| 307 |
> |
polyFree(poly); |
| 308 |
> |
return(1); |
| 309 |
|
} |
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|
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|
