| 1 |
/* Copyright (c) 1995 Regents of the University of California */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* Convert MGF to Inventor file. |
| 9 |
* |
| 10 |
* December 1995 Greg Ward |
| 11 |
*/ |
| 12 |
|
| 13 |
#include <stdio.h> |
| 14 |
|
| 15 |
#include <math.h> |
| 16 |
|
| 17 |
#include <ctype.h> |
| 18 |
|
| 19 |
#include "parser.h" |
| 20 |
|
| 21 |
#define O_INV1 1 /* Inventor 1.0 output */ |
| 22 |
#define O_INV2 2 /* Inventor 2.0 output */ |
| 23 |
#define O_VRML 3 /* VRML output */ |
| 24 |
|
| 25 |
#define TABSTOP 8 /* assumed number of characters per tab */ |
| 26 |
#define SHIFTW 2 /* nesting shift width */ |
| 27 |
#define MAXIND 15 /* maximum indent level */ |
| 28 |
|
| 29 |
char tabs[MAXIND*SHIFTW+1]; /* current tab-in string */ |
| 30 |
|
| 31 |
int outtype = O_INV2; /* output format */ |
| 32 |
|
| 33 |
extern int i_comment(), i_object(), i_xf(), |
| 34 |
i_cyl(), i_face(), i_sph(); |
| 35 |
|
| 36 |
extern char *to_id(); |
| 37 |
|
| 38 |
|
| 39 |
main(argc, argv) |
| 40 |
int argc; |
| 41 |
char *argv[]; |
| 42 |
{ |
| 43 |
int i; |
| 44 |
/* initialize dispatch table */ |
| 45 |
mg_ehand[MG_E_COMMENT] = i_comment; /* we pass comments */ |
| 46 |
mg_ehand[MG_E_COLOR] = c_hcolor; /* they get color */ |
| 47 |
mg_ehand[MG_E_CMIX] = c_hcolor; /* they mix colors */ |
| 48 |
mg_ehand[MG_E_CSPEC] = c_hcolor; /* they get spectra */ |
| 49 |
mg_ehand[MG_E_CXY] = c_hcolor; /* they get chromaticities */ |
| 50 |
mg_ehand[MG_E_CCT] = c_hcolor; /* they get color temp's */ |
| 51 |
mg_ehand[MG_E_CYL] = i_cyl; /* we do cylinders */ |
| 52 |
mg_ehand[MG_E_ED] = c_hmaterial; /* they get emission */ |
| 53 |
mg_ehand[MG_E_FACE] = i_face; /* we do faces */ |
| 54 |
mg_ehand[MG_E_MATERIAL] = c_hmaterial; /* they get materials */ |
| 55 |
mg_ehand[MG_E_NORMAL] = c_hvertex; /* they get normals */ |
| 56 |
mg_ehand[MG_E_OBJECT] = i_object; /* we track object names */ |
| 57 |
mg_ehand[MG_E_POINT] = c_hvertex; /* they get points */ |
| 58 |
mg_ehand[MG_E_RD] = c_hmaterial; /* they get diffuse refl. */ |
| 59 |
mg_ehand[MG_E_RS] = c_hmaterial; /* they get specular refl. */ |
| 60 |
mg_ehand[MG_E_SIDES] = c_hmaterial; /* they get # sides */ |
| 61 |
mg_ehand[MG_E_SPH] = i_sph; /* we do spheres */ |
| 62 |
mg_ehand[MG_E_TD] = c_hmaterial; /* they get diffuse trans. */ |
| 63 |
mg_ehand[MG_E_TS] = c_hmaterial; /* they get specular trans. */ |
| 64 |
mg_ehand[MG_E_VERTEX] = c_hvertex; /* they get vertices */ |
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mg_ehand[MG_E_XF] = i_xf; /* we track transforms */ |
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mg_init(); /* initialize the parser */ |
| 67 |
/* get options and print format line */ |
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for (i = 1; i < argc && argv[i][0] == '-'; i++) |
| 69 |
if (!strcmp(argv[i], "-vrml")) |
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outtype = O_VRML; |
| 71 |
else if (!strcmp(argv[i], "-1")) |
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outtype = O_INV1; |
| 73 |
else if (!strcmp(argv[i], "-2")) |
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outtype = O_INV2; |
| 75 |
else |
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goto userr; |
| 77 |
switch (outtype) { |
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case O_INV1: |
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printf("#Inventor V1.0 ascii\n"); |
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break; |
| 81 |
case O_INV2: |
| 82 |
printf("#Inventor V2.0 ascii\n"); |
| 83 |
break; |
| 84 |
case O_VRML: |
| 85 |
printf("#VRML 1.0 ascii\n"); |
| 86 |
break; |
| 87 |
} |
| 88 |
printf("## Translated from MGF Version %d.%d\n", MG_VMAJOR, MG_VMINOR); |
| 89 |
printf("Separator {\n"); /* begin root node */ |
| 90 |
/* general properties */ |
| 91 |
printf("MaterialBinding { value OVERALL }\n"); |
| 92 |
printf("NormalBinding { value PER_VERTEX_INDEXED }\n"); |
| 93 |
if (outtype != O_INV1) { |
| 94 |
printf("ShapeHints {\n"); |
| 95 |
printf("\tvertexOrdering CLOCKWISE\n"); |
| 96 |
printf("\tfaceType UNKNOWN_FACE_TYPE\n"); |
| 97 |
printf("}\n"); |
| 98 |
} |
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if (i == argc) { /* load standard input */ |
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if (mg_load(NULL) != MG_OK) |
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exit(1); |
| 102 |
if (mg_nunknown) |
| 103 |
printf("## %s: %u unknown entities\n", |
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argv[0], mg_nunknown); |
| 105 |
} |
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/* load MGF files */ |
| 107 |
for ( ; i < argc; i++) { |
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printf("## %s %s ##############################\n", |
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argv[0], argv[i]); |
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mg_nunknown = 0; |
| 111 |
if (mg_load(argv[i]) != MG_OK) |
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exit(1); |
| 113 |
if (mg_nunknown) |
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printf("## %s %s: %u unknown entities\n", |
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argv[0], argv[i], mg_nunknown); |
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} |
| 117 |
printf("}\n"); /* close root node */ |
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exit(0); |
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userr: |
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fprintf(stderr, "%s: [-1|-2|-vrml] [file] ..\n", argv[0]); |
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exit(1); |
| 122 |
} |
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|
| 124 |
|
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indent(deeper) /* indent in or out */ |
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int deeper; |
| 127 |
{ |
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static int level; /* current nesting level */ |
| 129 |
register int i; |
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register char *cp; |
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|
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if (deeper) level++; /* in or out? */ |
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else if (level > 0) level--; |
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/* compute actual shift */ |
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if ((i = level) > MAXIND) i = MAXIND; |
| 136 |
cp = tabs; |
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for (i *= SHIFTW; i >= TABSTOP; i -= TABSTOP) |
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*cp++ = '\t'; |
| 139 |
while (i--) |
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*cp++ = ' '; |
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*cp = '\0'; |
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} |
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|
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|
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int |
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i_comment(ac, av) /* transfer comment as is */ |
| 147 |
int ac; |
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char **av; |
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{ |
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fputs(tabs, stdout); |
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putchar('#'); /* Inventor comment character */ |
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while (--ac > 0) { |
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putchar(' '); |
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fputs(*++av, stdout); |
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} |
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putchar('\n'); |
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return(MG_OK); |
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} |
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|
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|
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int |
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i_object(ac, av) /* group object name */ |
| 163 |
int ac; |
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char **av; |
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{ |
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static int objnest; |
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|
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if (ac == 2) { /* start group */ |
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printf("%sDEF %s Group {\n", tabs, to_id(av[1])); |
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indent(1); |
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objnest++; |
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return(MG_OK); |
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} |
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if (ac == 1) { /* end group */ |
| 175 |
if (--objnest < 0) |
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return(MG_ECNTXT); |
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indent(0); |
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fputs(tabs, stdout); |
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fputs("}\n", stdout); |
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return(MG_OK); |
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} |
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return(MG_EARGC); |
| 183 |
} |
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|
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|
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int |
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i_xf(ac, av) /* transform object(s) */ |
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int ac; |
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char **av; |
| 190 |
{ |
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static long xfid; |
| 192 |
register XF_SPEC *spec; |
| 193 |
|
| 194 |
if (ac == 1) { /* end of transform */ |
| 195 |
if ((spec = xf_context) == NULL) |
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return(MG_ECNTXT); |
| 197 |
indent(0); /* close original segment */ |
| 198 |
printf("%s}\n", tabs); |
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indent(0); |
| 200 |
printf("%s}\n", tabs); |
| 201 |
if (spec->xarr != NULL) { /* check for iteration */ |
| 202 |
register struct xf_array *ap = spec->xarr; |
| 203 |
register int n; |
| 204 |
|
| 205 |
ap->aarg[ap->ndim-1].i = 1; /* iterate array */ |
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for ( ; ; ) { |
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n = ap->ndim-1; |
| 208 |
while (ap->aarg[n].i < ap->aarg[n].n) { |
| 209 |
sprintf(ap->aarg[n].arg, "%d", |
| 210 |
ap->aarg[n].i); |
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printf("%sSeparator {\n", tabs); |
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indent(1); |
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(void)put_xform(spec); |
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printf("%sUSE _xf%ld\n", tabs, |
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spec->xid); |
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indent(0); |
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printf("%s}\n", tabs); |
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++ap->aarg[n].i; |
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} |
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ap->aarg[n].i = 0; |
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(void)strcpy(ap->aarg[n].arg, "0"); |
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while (n-- && ++ap->aarg[n].i >= ap->aarg[n].n) { |
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ap->aarg[n].i = 0; |
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(void)strcpy(ap->aarg[n].arg, "0"); |
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} |
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if (n < 0) |
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break; |
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sprintf(ap->aarg[n].arg, "%d", ap->aarg[n].i); |
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} |
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} |
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/* pop transform */ |
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xf_context = spec->prev; |
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free_xf(spec); |
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return(MG_OK); |
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} |
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/* else allocate new transform */ |
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if ((spec = new_xf(ac-1, av+1)) == NULL) |
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return(MG_EMEM); |
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spec->xid = ++xfid; /* assign unique ID */ |
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spec->prev = xf_context; /* push onto stack */ |
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xf_context = spec; |
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/* translate xf specification */ |
| 243 |
printf("%sSeparator {\n", tabs); |
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indent(1); |
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if (put_xform(spec) < 0) |
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return(MG_ETYPE); |
| 247 |
printf("%sDEF _xf%ld Group {\n", tabs, spec->xid); /* begin */ |
| 248 |
indent(1); |
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return(MG_OK); |
| 250 |
} |
| 251 |
|
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|
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int |
| 254 |
put_xform(spec) /* translate and print transform */ |
| 255 |
register XF_SPEC *spec; |
| 256 |
{ |
| 257 |
register char **av; |
| 258 |
register int n; |
| 259 |
|
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n = xf_ac(spec) - xf_ac(spec->prev); |
| 261 |
if (xf(&spec->xf, n, av=xf_av(spec)) != n) |
| 262 |
return(-1); |
| 263 |
printf("%sMatrixTransform {\n", tabs); |
| 264 |
indent(1); |
| 265 |
printf("%s# xf", tabs); /* put out original as comment */ |
| 266 |
while (n--) { |
| 267 |
putchar(' '); |
| 268 |
fputs(*av++, stdout); |
| 269 |
} |
| 270 |
putchar('\n'); /* put out computed matrix */ |
| 271 |
printf("%smatrix %13.9g %13.9g %13.9g %13.9g\n", tabs, |
| 272 |
spec->xf.xfm[0][0], spec->xf.xfm[0][1], |
| 273 |
spec->xf.xfm[0][2], spec->xf.xfm[0][3]); |
| 274 |
for (n = 1; n < 4; n++) |
| 275 |
printf("%s %13.9g %13.9g %13.9g %13.9g\n", tabs, |
| 276 |
spec->xf.xfm[n][0], spec->xf.xfm[n][1], |
| 277 |
spec->xf.xfm[n][2], spec->xf.xfm[n][3]); |
| 278 |
indent(0); |
| 279 |
printf("%s}\n", tabs); |
| 280 |
return(0); |
| 281 |
} |
| 282 |
|
| 283 |
|
| 284 |
int |
| 285 |
put_material() /* put out current material */ |
| 286 |
{ |
| 287 |
char *mname = "mat"; |
| 288 |
float rgbval[3]; |
| 289 |
|
| 290 |
if (c_cmname != NULL) |
| 291 |
mname = c_cmname; |
| 292 |
if (!c_cmaterial->clock) { /* current, just use it */ |
| 293 |
printf("%sUSE %s\n", tabs, to_id(mname)); |
| 294 |
return(0); |
| 295 |
} |
| 296 |
/* else update definition */ |
| 297 |
printf("%sDEF %s Group {\n", tabs, to_id(mname)); |
| 298 |
indent(1); |
| 299 |
printf("%sMaterial {\n", tabs); |
| 300 |
indent(1); |
| 301 |
mgf2rgb(&c_cmaterial->rd_c, c_cmaterial->rd, rgbval); |
| 302 |
printf("%sambientColor %.4f %.4f %.4f\n", tabs, |
| 303 |
rgbval[0], rgbval[1], rgbval[2]); |
| 304 |
printf("%sdiffuseColor %.4f %.4f %.4f\n", tabs, |
| 305 |
rgbval[0], rgbval[1], rgbval[2]); |
| 306 |
if (c_cmaterial->rs > FTINY) { |
| 307 |
mgf2rgb(&c_cmaterial->rs_c, c_cmaterial->rs, rgbval); |
| 308 |
printf("%sspecularColor %.4f %.4f %.4f\n", tabs, |
| 309 |
rgbval[0], rgbval[1], rgbval[2]); |
| 310 |
printf("%sshininess %.3f\n", tabs, 1.-c_cmaterial->rs_a); |
| 311 |
} |
| 312 |
if (c_cmaterial->ed > FTINY) { |
| 313 |
mgf2rgb(&c_cmaterial->ed_c, 1.0, rgbval); |
| 314 |
printf("%semissiveColor %.4f %.4f %.4f\n", tabs, |
| 315 |
rgbval[0], rgbval[1], rgbval[2]); |
| 316 |
} |
| 317 |
if (c_cmaterial->ts > FTINY) |
| 318 |
printf("%stransparency %.4f\n", tabs, |
| 319 |
c_cmaterial->ts + c_cmaterial->td); |
| 320 |
indent(0); |
| 321 |
printf("%s}\n", tabs); |
| 322 |
if (outtype != O_INV1) |
| 323 |
printf("%sShapeHints { shapeType %s }\n", tabs, |
| 324 |
c_cmaterial->sided ? "SOLID" : "UNKNOWN_SHAPE_TYPE"); |
| 325 |
indent(0); |
| 326 |
printf("%s}\n", tabs); |
| 327 |
c_cmaterial->clock = 0; |
| 328 |
return(0); |
| 329 |
} |
| 330 |
|
| 331 |
|
| 332 |
int |
| 333 |
i_face(ac, av) /* translate an N-sided face */ |
| 334 |
int ac; |
| 335 |
char **av; |
| 336 |
{ |
| 337 |
C_VERTEX *vl[MG_MAXARGC-1]; |
| 338 |
int donorms = 1; |
| 339 |
register int i; |
| 340 |
|
| 341 |
if (ac < 4) |
| 342 |
return(MG_EARGC); |
| 343 |
printf("%sSeparator {\n", tabs); |
| 344 |
indent(1); |
| 345 |
/* put out current material */ |
| 346 |
if (put_material() < 0) |
| 347 |
return(MG_EBADMAT); |
| 348 |
/* get vertex references */ |
| 349 |
for (i = 0; i < ac-1; i++) { |
| 350 |
if ((vl[i] = c_getvert(av[i+1])) == NULL) |
| 351 |
return(MG_EUNDEF); |
| 352 |
if (is0vect(vl[i]->n)) |
| 353 |
donorms = 0; |
| 354 |
} |
| 355 |
/* put out normal coordinates */ |
| 356 |
if (donorms) { |
| 357 |
printf("%sNormal {\n", tabs); |
| 358 |
indent(1); |
| 359 |
printf("%svector [ %5.3g %5.3g %5.3g", tabs, |
| 360 |
vl[0]->n[0], vl[0]->n[1], vl[0]->n[2]); |
| 361 |
for (i = 1; i < ac-1; i++) |
| 362 |
printf(",\n%s %5.3g %5.3g %5.3g", tabs, |
| 363 |
vl[i]->n[0], vl[i]->n[1], vl[i]->n[2]); |
| 364 |
indent(0); |
| 365 |
printf(" ]\n%s}\n", tabs); |
| 366 |
} else |
| 367 |
printf("%sNormal { }\n", tabs); |
| 368 |
/* put out vertex coordinates */ |
| 369 |
printf("%sCoordinate3 {\n", tabs); |
| 370 |
indent(1); |
| 371 |
printf("%spoint [ %13.9g %13.9g %13.9g", tabs, |
| 372 |
vl[0]->p[0], vl[0]->p[1], vl[0]->p[2]); |
| 373 |
for (i = 1; i < ac-1; i++) |
| 374 |
printf(",\n%s %13.9g %13.9g %13.9g", tabs, |
| 375 |
vl[i]->p[0], vl[i]->p[1], vl[i]->p[2]); |
| 376 |
indent(0); |
| 377 |
printf(" ]\n%s}\n", tabs); |
| 378 |
/* put out actual face */ |
| 379 |
printf("%sIndexedFaceSet {\n", tabs); |
| 380 |
indent(1); |
| 381 |
if (donorms) { |
| 382 |
printf("%snormalIndex [ 0", tabs); |
| 383 |
for (i = 1; i < ac-1; i++) |
| 384 |
printf(", %d", i); |
| 385 |
printf(" ]\n"); |
| 386 |
} |
| 387 |
printf("%scoordIndex [ 0", tabs); |
| 388 |
for (i = 1; i < ac-1; i++) |
| 389 |
printf(", %d", i); |
| 390 |
printf(" ]\n"); |
| 391 |
indent(0); |
| 392 |
printf("%s}\n", tabs); |
| 393 |
indent(0); |
| 394 |
printf("%s}\n", tabs); |
| 395 |
return(MG_OK); |
| 396 |
} |
| 397 |
|
| 398 |
|
| 399 |
int |
| 400 |
i_sph(ac, av) /* translate sphere description */ |
| 401 |
int ac; |
| 402 |
char **av; |
| 403 |
{ |
| 404 |
register C_VERTEX *cent; |
| 405 |
|
| 406 |
if (ac != 3) |
| 407 |
return(MG_EARGC); |
| 408 |
printf("%sSeparator {\n", tabs); |
| 409 |
indent(1); |
| 410 |
/* put out current material */ |
| 411 |
if (put_material() < 0) |
| 412 |
return(MG_EBADMAT); |
| 413 |
/* get center */ |
| 414 |
if ((cent = c_getvert(av[1])) == NULL) |
| 415 |
return(MG_EUNDEF); |
| 416 |
/* get radius */ |
| 417 |
if (!isflt(av[2])) |
| 418 |
return(MG_ETYPE); |
| 419 |
printf("%sTranslation { translation %13.9g %13.9g %13.9g }\n", tabs, |
| 420 |
cent->p[0], cent->p[1], cent->p[2]); |
| 421 |
printf("%sSphere { radius %s }\n", tabs, av[2]); |
| 422 |
indent(0); |
| 423 |
printf("%s}\n", tabs); |
| 424 |
return(MG_OK); |
| 425 |
} |
| 426 |
|
| 427 |
|
| 428 |
int |
| 429 |
i_cyl(ac, av) /* translate a cylinder description */ |
| 430 |
int ac; |
| 431 |
char **av; |
| 432 |
{ |
| 433 |
register C_VERTEX *v1, *v2; |
| 434 |
FVECT va; |
| 435 |
double length, angle; |
| 436 |
|
| 437 |
if (ac != 4) |
| 438 |
return(MG_EARGC); |
| 439 |
printf("%sSeparator {\n", tabs); |
| 440 |
indent(1); |
| 441 |
/* put out current material */ |
| 442 |
if (put_material() < 0) |
| 443 |
return(MG_EBADMAT); |
| 444 |
/* get endpoints */ |
| 445 |
if ((v1 = c_getvert(av[1])) == NULL | (v2 = c_getvert(av[3])) == NULL) |
| 446 |
return(MG_EUNDEF); |
| 447 |
/* get radius */ |
| 448 |
if (!isflt(av[2])) |
| 449 |
return(MG_ETYPE); |
| 450 |
/* compute transform */ |
| 451 |
va[0] = v2->p[0] - v1->p[0]; |
| 452 |
va[1] = v2->p[1] - v1->p[1]; |
| 453 |
va[2] = v2->p[2] - v1->p[2]; |
| 454 |
length = sqrt(DOT(va,va)); |
| 455 |
angle = acos(va[1]/length); |
| 456 |
printf("%sTranslation { translation %13.9g %13.9g %13.9g }\n", tabs, |
| 457 |
.5*(v1->p[0]+v2->p[0]), .5*(v1->p[1]+v2->p[1]), |
| 458 |
.5*(v1->p[2]+v2->p[2])); |
| 459 |
printf("%sRotation { rotation %.9g %.9g %.9g %.9g }\n", tabs, |
| 460 |
va[2], 0., -va[0], angle); |
| 461 |
/* open-ended */ |
| 462 |
printf("%sCylinder { parts SIDES height %13.9g radius %s }\n", tabs, |
| 463 |
length, av[2]); |
| 464 |
indent(0); |
| 465 |
printf("%s}\n", tabs); |
| 466 |
return(MG_OK); |
| 467 |
} |
| 468 |
|
| 469 |
|
| 470 |
char * |
| 471 |
to_id(name) /* make sure a name is a valid Inventor ID */ |
| 472 |
register char *name; |
| 473 |
{ |
| 474 |
static char id[32]; |
| 475 |
register char *cp; |
| 476 |
|
| 477 |
for (cp = id; cp < id+sizeof(id)-1 && *name; name++) |
| 478 |
if (isalnum(*name) || *name == '_') |
| 479 |
*cp++ = *name; |
| 480 |
else |
| 481 |
*cp++ = '_'; |
| 482 |
*cp = '\0'; |
| 483 |
return(id); |
| 484 |
} |
