11 |
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#include "cvmesh.h" |
12 |
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#include <ctype.h> |
13 |
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|
14 |
– |
FVECT *vlist; /* our vertex list */ |
15 |
– |
int nvs; /* number of vertices in our list */ |
16 |
– |
FVECT *vnlist; /* vertex normal list */ |
17 |
– |
int nvns; |
18 |
– |
FLOAT (*vtlist)[2]; /* map vertex list */ |
19 |
– |
int nvts; |
20 |
– |
|
14 |
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typedef int VNDX[3]; /* vertex index (point,map,normal) */ |
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|
16 |
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#define CHUNKSIZ 1024 /* vertex allocation chunk size */ |
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|
18 |
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#define MAXARG 64 /* maximum # arguments in a statement */ |
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|
|
20 |
< |
char *inpfile; /* input file name */ |
21 |
< |
int lineno; /* current line number */ |
22 |
< |
int faceno; /* current face number */ |
20 |
> |
static FVECT *vlist; /* our vertex list */ |
21 |
> |
static int nvs; /* number of vertices in our list */ |
22 |
> |
static FVECT *vnlist; /* vertex normal list */ |
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> |
static int nvns; |
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> |
static RREAL (*vtlist)[2]; /* map vertex list */ |
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> |
static int nvts; |
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|
|
27 |
+ |
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 int lineno; /* current line number */ |
32 |
+ |
static int faceno; /* current face number */ |
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|
|
34 |
+ |
static int getstmt(); |
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static int cvtndx(); |
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+ |
static OBJECT getmod(); |
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+ |
static int putface(); |
38 |
+ |
static int puttri(); |
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static void freeverts(); |
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+ |
static int newv(); |
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+ |
static int newvn(); |
42 |
+ |
static int newvt(); |
43 |
+ |
static void syntax(); |
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|
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|
46 |
+ |
void |
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wfreadobj(objfn) /* read in .OBJ file and convert */ |
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char *objfn; |
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{ |
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sprintf(errmsg, "cannot open \"%s\"", inpfile); |
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error(USER, errmsg); |
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} |
63 |
+ |
havemats = (nobjects > 0); |
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nstats = nunknown = 0; |
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+ |
material[0] = '\0'; |
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group[0] = '\0'; |
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lineno = 0; faceno = 0; |
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/* scan until EOF */ |
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< |
while (argc = getstmt(argv, fp)) { |
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> |
while ( (argc = getstmt(argv, fp)) ) { |
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switch (argv[0][0]) { |
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case 'v': /* vertex */ |
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switch (argv[0][1]) { |
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case '\0': /* point */ |
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if (badarg(argc-1,argv+1,"fff")) |
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syntax("Bad vertex"); |
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syntax("bad vertex"); |
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newv(atof(argv[1]), atof(argv[2]), |
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atof(argv[3])); |
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break; |
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if (argv[0][2]) |
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goto unknown; |
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if (badarg(argc-1,argv+1,"fff")) |
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syntax("Bad normal"); |
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syntax("bad normal"); |
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if (!newvn(atof(argv[1]), atof(argv[2]), |
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atof(argv[3]))) |
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syntax("Zero normal"); |
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syntax("zero normal"); |
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break; |
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case 't': /* texture map */ |
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case 't': /* coordinate */ |
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if (argv[0][2]) |
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goto unknown; |
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if (badarg(argc-1,argv+1,"ff")) |
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faceno++; |
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switch (argc-1) { |
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case 0: case 1: case 2: |
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syntax("Too few vertices"); |
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syntax("too few vertices"); |
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break; |
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case 3: |
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if (!puttri(argv[1], argv[2], argv[3])) |
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syntax("Bad triangle"); |
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syntax("bad triangle"); |
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break; |
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default: |
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if (!putface(argc-1, argv+1)) |
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syntax("Bad face"); |
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syntax("bad face"); |
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break; |
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} |
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break; |
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case 'u': |
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if (strcmp(argv[0], "usemtl") && |
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strcmp(argv[0], "usemap")) |
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case 'u': /* usemtl/usemap */ |
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if (!strcmp(argv[0], "usemap")) |
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break; |
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if (strcmp(argv[0], "usemtl")) |
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goto unknown; |
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if (argc > 1) |
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strcpy(material, argv[1]); |
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else |
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material[0] = '\0'; |
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break; |
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case 'o': /* object name */ |
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if (argv[0][1]) |
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goto unknown; |
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break; |
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case 'g': /* group name(s) */ |
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case 'g': /* group name */ |
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if (argv[0][1]) |
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goto unknown; |
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if (argc > 1) |
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strcpy(group, argv[1]); |
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else |
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group[0] = '\0'; |
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break; |
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case '#': /* comment */ |
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break; |
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} |
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|
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|
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int |
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static int |
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getstmt(av, fp) /* read the next statement from fp */ |
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register char *av[MAXARG]; |
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FILE *fp; |
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{ |
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static char sbuf[MAXARG*10]; |
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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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|
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} |
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|
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|
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static int |
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cvtndx(vi, vs) /* convert vertex string to index */ |
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register VNDX vi; |
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register char *vs; |
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} |
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|
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|
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static int |
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putface(ac, av) /* put out an N-sided polygon */ |
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int ac; |
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register char **av; |
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{ |
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VNDX vi; |
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char *cp; |
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register int i; |
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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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{ |
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fprintf(stderr, "f %s %s %s\n", av[0], av[1], av[2]); |
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return(0); |
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} |
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ac--; /* remove vertex & rotate */ |
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cp = av[0]; |
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for (i = 0; i < ac-1; i++) |
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} |
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|
|
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|
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static OBJECT |
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getmod() /* get current modifier ID */ |
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{ |
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char *mnam; |
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OBJECT mod; |
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|
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if (!havemats) |
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return(OVOID); |
269 |
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if (!strcmp(material, VOIDID)) |
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return(OVOID); |
271 |
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if (material[0]) /* prefer usemtl statements */ |
272 |
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mnam = material; |
273 |
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else if (group[0]) /* else use group name */ |
274 |
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mnam = group; |
275 |
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else |
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return(OVOID); |
277 |
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mod = modifier(mnam); |
278 |
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if (mod == OVOID) { |
279 |
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sprintf(errmsg, "%s: undefined modifier \"%s\"", |
280 |
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inpfile, mnam); |
281 |
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error(USER, errmsg); |
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} |
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return(mod); |
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} |
285 |
+ |
|
286 |
+ |
|
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static int |
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puttri(v1, v2, v3) /* convert a triangle */ |
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char *v1, *v2, *v3; |
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{ |
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VNDX v1i, v2i, v3i; |
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< |
FLOAT *v1c, *v2c, *v3c; |
293 |
< |
FLOAT *v1n, *v2n, *v3n; |
294 |
< |
|
292 |
> |
RREAL *v1c, *v2c, *v3c; |
293 |
> |
RREAL *v1n, *v2n, *v3n; |
294 |
> |
|
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if (!cvtndx(v1i, v1) || !cvtndx(v2i, v2) || !cvtndx(v3i, v3)) |
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return(0); |
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|
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} else |
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v1n = v2n = v3n = NULL; |
311 |
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|
312 |
< |
return(cvtri(vlist[v1i[0]], vlist[v2i[0]], vlist[v3i[0]], |
312 |
> |
return(cvtri(getmod(), vlist[v1i[0]], vlist[v2i[0]], vlist[v3i[0]], |
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v1n, v2n, v3n, v1c, v2c, v3c) >= 0); |
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} |
315 |
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|
316 |
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|
317 |
+ |
static void |
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freeverts() /* free all vertices */ |
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{ |
320 |
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if (nvs) { |
332 |
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} |
333 |
|
|
334 |
|
|
335 |
< |
int |
335 |
> |
static int |
336 |
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newv(x, y, z) /* create a new vertex */ |
337 |
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double x, y, z; |
338 |
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{ |
340 |
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if (nvs == 0) |
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vlist = (FVECT *)malloc(CHUNKSIZ*sizeof(FVECT)); |
342 |
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else |
343 |
< |
vlist = (FVECT *)realloc((char *)vlist, |
343 |
> |
vlist = (FVECT *)realloc((void *)vlist, |
344 |
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(nvs+CHUNKSIZ)*sizeof(FVECT)); |
345 |
< |
if (vlist == NULL) { |
346 |
< |
fprintf(stderr, |
294 |
< |
"Out of memory while allocating vertex %d\n", nvs); |
295 |
< |
exit(1); |
296 |
< |
} |
345 |
> |
if (vlist == NULL) |
346 |
> |
error(SYSTEM, "out of memory in newv"); |
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} |
348 |
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/* assign new vertex */ |
349 |
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vlist[nvs][0] = x; |
353 |
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} |
354 |
|
|
355 |
|
|
356 |
< |
int |
356 |
> |
static int |
357 |
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newvn(x, y, z) /* create a new vertex normal */ |
358 |
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double x, y, z; |
359 |
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{ |
361 |
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if (nvns == 0) |
362 |
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vnlist = (FVECT *)malloc(CHUNKSIZ*sizeof(FVECT)); |
363 |
|
else |
364 |
< |
vnlist = (FVECT *)realloc((char *)vnlist, |
364 |
> |
vnlist = (FVECT *)realloc((void *)vnlist, |
365 |
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(nvns+CHUNKSIZ)*sizeof(FVECT)); |
366 |
< |
if (vnlist == NULL) { |
367 |
< |
fprintf(stderr, |
318 |
< |
"Out of memory while allocating normal %d\n", nvns); |
319 |
< |
exit(1); |
320 |
< |
} |
366 |
> |
if (vnlist == NULL) |
367 |
> |
error(SYSTEM, "out of memory in newvn"); |
368 |
|
} |
369 |
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/* assign new normal */ |
370 |
|
vnlist[nvns][0] = x; |
376 |
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} |
377 |
|
|
378 |
|
|
379 |
< |
int |
379 |
> |
static int |
380 |
|
newvt(x, y) /* create a new texture map vertex */ |
381 |
|
double x, y; |
382 |
|
{ |
383 |
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if (!(nvts%CHUNKSIZ)) { /* allocate next block */ |
384 |
|
if (nvts == 0) |
385 |
< |
vtlist = (FLOAT (*)[2])malloc(CHUNKSIZ*2*sizeof(FLOAT)); |
385 |
> |
vtlist = (RREAL (*)[2])malloc(CHUNKSIZ*2*sizeof(RREAL)); |
386 |
|
else |
387 |
< |
vtlist = (FLOAT (*)[2])realloc((char *)vtlist, |
388 |
< |
(nvts+CHUNKSIZ)*2*sizeof(FLOAT)); |
389 |
< |
if (vtlist == NULL) { |
390 |
< |
fprintf(stderr, |
344 |
< |
"Out of memory while allocating texture vertex %d\n", |
345 |
< |
nvts); |
346 |
< |
exit(1); |
347 |
< |
} |
387 |
> |
vtlist = (RREAL (*)[2])realloc((void *)vtlist, |
388 |
> |
(nvts+CHUNKSIZ)*2*sizeof(RREAL)); |
389 |
> |
if (vtlist == NULL) |
390 |
> |
error(SYSTEM, "out of memory in newvt"); |
391 |
|
} |
392 |
|
/* assign new vertex */ |
393 |
|
vtlist[nvts][0] = x; |
396 |
|
} |
397 |
|
|
398 |
|
|
399 |
+ |
static void |
400 |
|
syntax(er) /* report syntax error and exit */ |
401 |
|
char *er; |
402 |
|
{ |
403 |
< |
fprintf(stderr, "%s: Wavefront syntax error near line %d: %s\n", |
403 |
> |
sprintf(errmsg, "%s: Wavefront syntax error near line %d: %s\n", |
404 |
|
inpfile, lineno, er); |
405 |
< |
exit(1); |
405 |
> |
error(USER, errmsg); |
406 |
|
} |