--- ray/src/cv/obj2rad.c 1994/04/12 17:28:52 2.2 +++ ray/src/cv/obj2rad.c 1994/06/15 12:50:37 2.11 @@ -7,22 +7,23 @@ static char SCCSid[] = "$SunId$ LBL"; /* * Convert a Wavefront .obj file to Radiance format. * - * Currently, we support only polygonal geometry, and faces - * must be either quads or triangles for smoothing to work. - * Also, texture indices only work for triangles, though - * I'm not sure they work correctly. + * Currently, we support only polygonal geometry. Non-planar + * faces are broken rather haphazardly into triangles. + * Also, texture map indices only work for triangles, though + * I'm not sure they work correctly. (Taken out -- see TEXMAPS defines.) */ #include "standard.h" +#include "trans.h" + #include -#define VOIDID "void" /* this is defined in object.h */ - #define TCALNAME "tmesh.cal" /* triangle interp. file */ -#define QCALNAME "surf.cal" /* quad interp. file */ #define PATNAME "M-pat" /* mesh pattern name (reused) */ #define TEXNAME "M-nor" /* mesh texture name (reused) */ +#define DEFOBJ "unnamed" /* default object name */ +#define DEFMAT "white" /* default material name */ #define ABS(x) ((x)>=0 ? (x) : -(x)) @@ -32,34 +33,63 @@ FVECT *vlist; /* our vertex list */ int nvs; /* number of vertices in our list */ FVECT *vnlist; /* vertex normal list */ int nvns; -FLOAT (*vtlist)[2]; /* texture vertex list */ +FLOAT (*vtlist)[2]; /* map vertex list */ int nvts; -typedef FLOAT BARYCCM[3][4]; /* barycentric coordinate system */ +typedef struct { + int ax; /* major axis */ + FLOAT tm[2][3]; /* transformation */ +} BARYCCM; -typedef int VNDX[3]; /* vertex index (point,texture,normal) */ +typedef int VNDX[3]; /* vertex index (point,map,normal) */ -#define CHUNKSIZ 128 /* vertex allocation chunk size */ +#define CHUNKSIZ 256 /* vertex allocation chunk size */ #define MAXARG 64 /* maximum # arguments in a statement */ -char *defmat = VOIDID; /* default (starting) material name */ -char *defpat = ""; /* default (starting) picture name */ -char *defobj = "F"; /* default (starting) object name */ + /* qualifiers */ +#define Q_MTL 0 +#define Q_MAP 1 +#define Q_GRP 2 +#define Q_OBJ 3 +#define Q_FAC 4 +#define NQUALS 5 -char picfile[128]; /* current picture file */ +char *qname[NQUALS] = { + "Material", + "Map", + "Group", + "Object", + "Face", +}; + +QLIST qlist = {NQUALS, qname}; + /* valid qualifier ids */ +IDLIST qual[NQUALS]; + /* mapping rules */ +RULEHD *ourmapping = NULL; + +char *defmat = DEFMAT; /* default (starting) material name */ +char *defobj = DEFOBJ; /* default (starting) object name */ + +int flatten = 0; /* discard surface normal information */ + +char *getmtl(), *getonm(); + +char mapname[128]; /* current picture file */ char matname[64]; /* current material name */ +char group[16][32]; /* current group names */ char objname[128]; /* current object name */ +char *inpfile; /* input file name */ int lineno; /* current line number */ +int faceno; /* current face number */ -int nfaces; /* total number of faces output */ - -main(argc, argv) /* read in T-mesh files and convert */ +main(argc, argv) /* read in .obj file and convert */ int argc; char *argv[]; { - FILE *fp; + int donames = 0; int i; for (i = 1; i < argc && argv[i][0] == '-'; i++) @@ -67,50 +97,105 @@ char *argv[]; case 'o': /* object name */ defobj = argv[++i]; break; - case 'm': /* default material */ - defmat = argv[++i]; + case 'n': /* just produce name list */ + donames++; break; - case 'p': /* default picture */ - defpat = argv[++i]; + case 'm': /* use custom mapfile */ + ourmapping = getmapping(argv[++i], &qlist); break; + case 'f': /* flatten surfaces */ + flatten++; + break; default: - fprintf(stderr, - "Usage: %s [-o obj][-m mat][-p pic] [file ..]\n", - argv[0]); - exit(1); + goto userr; } - if (i >= argc) - convert("", stdin); - else - for ( ; i < argc; i++) { - if ((fp = fopen(argv[i], "r")) == NULL) { - perror(argv[i]); - exit(1); + if (i > argc | i < argc-1) + goto userr; + if (i == argc) + inpfile = ""; + else if (freopen(inpfile=argv[i], "r", stdin) == NULL) { + fprintf(stderr, "%s: cannot open\n", inpfile); + exit(1); + } + if (donames) { /* scan for ids */ + getnames(stdin); + printf("filename \"%s\"\n", inpfile); + printf("filetype \"Wavefront\"\n"); + write_quals(&qlist, qual, stdout); + printf("qualifier %s begin\n", qlist.qual[Q_FAC]); + printf("[%d:%d]\n", 1, faceno); + printf("end\n"); + } else { /* translate file */ + printf("# "); + printargs(argc, argv, stdout); + convert(stdin); + } + exit(0); +userr: + fprintf(stderr, "Usage: %s [-o obj][-m mapping][-n][-f] [file.obj]\n", + argv[0]); + exit(1); +} + + +getnames(fp) /* get valid qualifier names */ +FILE *fp; +{ + char *argv[MAXARG]; + int argc; + ID tmpid; + register int i; + + while (argc = getstmt(argv, fp)) + switch (argv[0][0]) { + case 'f': /* face */ + if (!argv[0][1]) + faceno++; + break; + case 'u': + if (!strcmp(argv[0], "usemtl")) { /* material */ + if (argc < 2) + break; /* not fatal */ + tmpid.number = 0; + tmpid.name = argv[1]; + findid(&qual[Q_MTL], &tmpid, 1); + } else if (!strcmp(argv[0], "usemap")) {/* map */ + if (argc < 2 || !strcmp(argv[1], "off")) + break; /* not fatal */ + tmpid.number = 0; + tmpid.name = argv[1]; + findid(&qual[Q_MAP], &tmpid, 1); } - convert(argv[i], fp); - fclose(fp); + break; + case 'o': /* object name */ + if (argv[0][1] || argc < 2) + break; + tmpid.number = 0; + tmpid.name = argv[1]; + findid(&qual[Q_OBJ], &tmpid, 1); + break; + case 'g': /* group name(s) */ + if (argv[0][1]) + break; + tmpid.number = 0; + for (i = 1; i < argc; i++) { + tmpid.name = argv[i]; + findid(&qual[Q_GRP], &tmpid, 1); + } + break; } - exit(0); } -convert(fname, fp) /* convert a T-mesh */ -char *fname; +convert(fp) /* convert a T-mesh */ FILE *fp; { char *argv[MAXARG]; int argc; int nstats, nunknown; register int i; - /* start fresh */ - freeverts(); - strcpy(picfile, defpat); - strcpy(matname, defmat); - strcpy(objname, defobj); - lineno = 0; - nstats = nunknown = 0; - printf("\n# Wavefront file read from: %s\n", fname); + nstats = nunknown = 0; /* scan until EOF */ while (argc = getstmt(argv, fp)) { switch (argv[0][0]) { @@ -118,7 +203,7 @@ FILE *fp; switch (argv[0][1]) { case '\0': /* point */ if (badarg(argc-1,argv+1,"fff")) - syntax(fname, lineno, "Bad vertex"); + syntax("Bad vertex"); newv(atof(argv[1]), atof(argv[2]), atof(argv[3])); break; @@ -126,12 +211,12 @@ FILE *fp; if (argv[0][2]) goto unknown; if (badarg(argc-1,argv+1,"fff")) - syntax(fname, lineno, "Bad normal"); + syntax("Bad normal"); if (!newvn(atof(argv[1]), atof(argv[2]), atof(argv[3]))) - syntax(fname, lineno, "Zero normal"); + syntax("Zero normal"); break; - case 't': /* texture */ + case 't': /* texture map */ if (argv[0][2]) goto unknown; if (badarg(argc-1,argv+1,"ff")) @@ -145,22 +230,18 @@ FILE *fp; case 'f': /* face */ if (argv[0][1]) goto unknown; + faceno++; switch (argc-1) { case 0: case 1: case 2: - syntax(fname, lineno, "Too few vertices"); + syntax("Too few vertices"); break; case 3: if (!puttri(argv[1], argv[2], argv[3])) - syntax(fname, lineno, "Bad triangle"); + syntax("Bad triangle"); break; - case 4: - if (!putquad(argv[1], argv[2], - argv[3], argv[4])) - syntax(fname, lineno, "Bad quad"); - break; default: if (!putface(argc-1, argv+1)) - syntax(fname, lineno, "Bad face"); + syntax("Bad face"); break; } break; @@ -173,9 +254,9 @@ FILE *fp; if (argc < 2) break; /* not fatal */ if (!strcmp(argv[1], "off")) - picfile[0] = '\0'; + mapname[0] = '\0'; else - strcpy(picfile, argv[1]); + sprintf(mapname, "%s.pic", argv[1]); } else goto unknown; break; @@ -189,17 +270,12 @@ FILE *fp; case 'g': /* group name(s) */ if (argv[0][1]) goto unknown; - if (argc < 2) - break; /* not fatal */ - objname[0] = '\0'; for (i = 1; i < argc; i++) - if (objname[0]) - sprintf(objname+strlen(objname), - ".%s", argv[i]); - else - strcpy(objname, argv[i]); + strcpy(group[i-1], argv[i]); + group[i-1][0] = '\0'; break; case '#': /* comment */ + printargs(argc, argv, stdout); break; default:; /* something we don't deal with */ unknown: @@ -208,7 +284,7 @@ FILE *fp; } nstats++; } - printf("\n# Done processing file: %s\n", fname); + printf("\n# Done processing file: %s\n", inpfile); printf("# %d lines, %d statements, %d unrecognized\n", lineno, nstats, nunknown); } @@ -246,8 +322,111 @@ FILE *fp; return(i); } - + +char * +getmtl() /* figure material for this face */ +{ + register RULEHD *rp = ourmapping; + + if (rp == NULL) { /* no rule set */ + if (matname[0]) + return(matname); + if (group[0][0]) + return(group[0]); + return(defmat); + } + /* check for match */ + do { + if (matchrule(rp)) { + if (!strcmp(rp->mnam, VOIDID)) + return(NULL); /* match is null */ + return(rp->mnam); + } + rp = rp->next; + } while (rp != NULL); + /* no match found */ + return(NULL); +} + + +char * +getonm() /* invent a good name for object */ +{ + static char name[64]; + register char *cp1, *cp2; + register int i; + /* check for preset */ + if (objname[0]) + return(objname); + if (!group[0][0]) + return(defobj); + cp1 = name; /* else make name out of groups */ + for (i = 0; group[i][0]; i++) { + cp2 = group[i]; + if (cp1 > name) + *cp1++ = '.'; + while (*cp1 = *cp2++) + if (++cp1 >= name+sizeof(name)-2) { + *cp1 = '\0'; + return(name); + } + } + return(name); +} + + +matchrule(rp) /* check for a match on this rule */ +register RULEHD *rp; +{ + ID tmpid; + int gotmatch; + register int i; + + if (rp->qflg & FL(Q_MTL)) { + if (!matname[0]) + return(0); + tmpid.number = 0; + tmpid.name = matname; + if (!matchid(&tmpid, &idm(rp)[Q_MTL])) + return(0); + } + if (rp->qflg & FL(Q_MAP)) { + if (!mapname[0]) + return(0); + tmpid.number = 0; + tmpid.name = mapname; + if (!matchid(&tmpid, &idm(rp)[Q_MAP])) + return(0); + } + if (rp->qflg & FL(Q_GRP)) { + tmpid.number = 0; + gotmatch = 0; + for (i = 0; group[i][0]; i++) { + tmpid.name = group[i]; + gotmatch |= matchid(&tmpid, &idm(rp)[Q_GRP]); + } + if (!gotmatch) + return(0); + } + if (rp->qflg & FL(Q_OBJ)) { + if (!objname[0]) + return(0); + tmpid.number = 0; + tmpid.name = objname; + if (!matchid(&tmpid, &idm(rp)[Q_OBJ])) + return(0); + } + if (rp->qflg & FL(Q_FAC)) { + tmpid.name = NULL; + tmpid.number = faceno; + if (!matchid(&tmpid, &idm(rp)[Q_FAC])) + return(0); + } + return(1); +} + + cvtndx(vi, vs) /* convert vertex string to index */ register VNDX vi; register char *vs; @@ -258,12 +437,12 @@ register char *vs; if (vi[0]-- > nvs) return(0); } else if (vi[0] < 0) { - vi[0] = nvs + vi[0]; + vi[0] += nvs; if (vi[0] < 0) return(0); } else return(0); - /* get texture */ + /* get map */ while (*vs) if (*vs++ == '/') break; @@ -272,7 +451,7 @@ register char *vs; if (vi[1]-- > nvts) return(0); } else if (vi[1] < 0) { - vi[1] = nvts + vi[1]; + vi[1] += nvts; if (vi[1] < 0) return(0); } else @@ -286,7 +465,7 @@ register char *vs; if (vi[2]-- > nvns) return(0); } else if (vi[2] < 0) { - vi[2] = nvns + vi[2]; + vi[2] += nvns; if (vi[2] < 0) return(0); } else @@ -295,16 +474,83 @@ register char *vs; } -putface(ac, av) /* put out an N-sided polygon */ +nonplanar(ac, av) /* are vertices non-planar? */ register int ac; register char **av; { VNDX vi; + FLOAT *p0, *p1; + FVECT v1, v2, nsum, newn; + double d; + register int i; - printf("\n%s polygon %s.%d\n", matname, objname, ++nfaces); + if (!cvtndx(vi, av[0])) + return(0); + if (vi[2] >= 0) + return(1); /* has interpolated normals */ + if (ac < 4) + return(0); /* it's a triangle! */ + /* set up */ + p0 = vlist[vi[0]]; + if (!cvtndx(vi, av[1])) + return(0); /* error gets caught later */ + nsum[0] = nsum[1] = nsum[2] = 0.; + p1 = vlist[vi[0]]; + fvsum(v2, p1, p0, -1.0); + for (i = 2; i < ac; i++) { + VCOPY(v1, v2); + if (!cvtndx(vi, av[i])) + return(0); + p1 = vlist[vi[0]]; + fvsum(v2, p1, p0, -1.0); + fcross(newn, v1, v2); + if (normalize(newn) == 0.0) { + if (i < 3) + return(1); /* can't deal with this */ + fvsum(nsum, nsum, nsum, 1./(i-2)); + continue; + } + d = fdot(newn,nsum); + if (d >= 0) { + if (d < (1.0-FTINY)*(i-2)) + return(1); + fvsum(nsum, nsum, newn, 1.0); + } else { + if (d > -(1.0-FTINY)*(i-2)) + return(1); + fvsum(nsum, nsum, newn, -1.0); + } + } + return(0); +} + + +putface(ac, av) /* put out an N-sided polygon */ +int ac; +register char **av; +{ + VNDX vi; + char *cp; + register int i; + + if (nonplanar(ac, av)) { /* break into triangles */ + while (ac > 2) { + if (!puttri(av[0], av[1], av[2])) + return(0); + ac--; /* remove vertex & rotate */ + cp = av[0]; + for (i = 0; i < ac-1; i++) + av[i] = av[i+2]; + av[i] = cp; + } + return(1); + } + if ((cp = getmtl()) == NULL) + return(-1); + printf("\n%s polygon %s.%d\n", cp, getonm(), faceno); printf("0\n0\n%d\n", 3*ac); - while (ac--) { - if (!cvtndx(vi, *av++)) + for (i = 0; i < ac; i++) { + if (!cvtndx(vi, av[i])) return(0); pvect(vlist[vi[0]]); } @@ -315,18 +561,25 @@ register char **av; puttri(v1, v2, v3) /* put out a triangle */ char *v1, *v2, *v3; { - char *mod = matname; + char *mod; VNDX v1i, v2i, v3i; BARYCCM bvecs; int texOK, patOK; + if ((mod = getmtl()) == NULL) + return(-1); + if (!cvtndx(v1i, v1) || !cvtndx(v2i, v2) || !cvtndx(v3i, v3)) return(0); /* compute barycentric coordinates */ - texOK = (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=0); - patOK = picfile[0] && (v1i[1]>=0 && v2i[1]>=0 && v3i[1]>=0); + texOK = !flatten && (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=0); +#ifdef TEXMAPS + patOK = mapname[0] && (v1i[1]>=0 && v2i[1]>=0 && v3i[1]>=0); +#else + patOK = 0; +#endif if (texOK | patOK) - if (comp_baryc(bvecs, vlist[v1i[0]], vlist[v2i[0]], + if (comp_baryc(&bvecs, vlist[v1i[0]], vlist[v2i[0]], vlist[v3i[0]]) < 0) return(-1); /* put out texture (if any) */ @@ -334,8 +587,8 @@ char *v1, *v2, *v3; printf("\n%s texfunc %s\n", mod, TEXNAME); mod = TEXNAME; printf("4 dx dy dz %s\n", TCALNAME); - printf("0\n21\n"); - put_baryc(bvecs); + printf("0\n16 "); + put_baryc(&bvecs); printf("\t%14.12g %14.12g %14.12g\n", vnlist[v1i[2]][0], vnlist[v2i[2]][0], vnlist[v3i[2]][0]); @@ -346,20 +599,22 @@ char *v1, *v2, *v3; vnlist[v1i[2]][2], vnlist[v2i[2]][2], vnlist[v3i[2]][2]); } +#ifdef TEXMAPS /* put out pattern (if any) */ if (patOK) { printf("\n%s colorpict %s\n", mod, PATNAME); mod = PATNAME; - printf("7 noneg noneg noneg %s %s u v\n", picfile, TCALNAME); - printf("0\n18\n"); - put_baryc(bvecs); + printf("7 noneg noneg noneg %s %s u v\n", mapname, TCALNAME); + printf("0\n13 "); + put_baryc(&bvecs); printf("\t%f %f %f\n", vtlist[v1i[1]][0], vtlist[v2i[1]][0], vtlist[v3i[1]][0]); printf("\t%f %f %f\n", vtlist[v1i[1]][1], vtlist[v2i[1]][1], vtlist[v3i[1]][1]); } +#endif /* put out triangle */ - printf("\n%s polygon %s.%d\n", mod, objname, ++nfaces); + printf("\n%s polygon %s.%d\n", mod, getonm(), faceno); printf("0\n0\n9\n"); pvect(vlist[v1i[0]]); pvect(vlist[v2i[0]]); @@ -371,33 +626,41 @@ char *v1, *v2, *v3; int comp_baryc(bcm, v1, v2, v3) /* compute barycentric vectors */ -register BARYCCM bcm; +register BARYCCM *bcm; FLOAT *v1, *v2, *v3; { FLOAT *vt; FVECT va, vab, vcb; double d; + int ax0, ax1; register int i, j; - - for (j = 0; j < 3; j++) { - for (i = 0; i < 3; i++) { - vab[i] = v1[i] - v2[i]; - vcb[i] = v3[i] - v2[i]; - } - d = DOT(vcb,vcb); + /* compute major axis */ + for (i = 0; i < 3; i++) { + vab[i] = v1[i] - v2[i]; + vcb[i] = v3[i] - v2[i]; + } + fcross(va, vab, vcb); + bcm->ax = ABS(va[0]) > ABS(va[1]) ? 0 : 1; + bcm->ax = ABS(va[bcm->ax]) > ABS(va[2]) ? bcm->ax : 2; + ax0 = (bcm->ax + 1) % 3; + ax1 = (bcm->ax + 2) % 3; + for (j = 0; j < 2; j++) { + vab[0] = v1[ax0] - v2[ax0]; + vcb[0] = v3[ax0] - v2[ax0]; + vab[1] = v1[ax1] - v2[ax1]; + vcb[1] = v3[ax1] - v2[ax1]; + d = vcb[0]*vcb[0] + vcb[1]*vcb[1]; if (d <= FTINY) return(-1); - d = DOT(vcb,vab)/d; - for (i = 0; i < 3; i++) - va[i] = vab[i] - vcb[i]*d; - d = DOT(va,va); + d = (vcb[0]*vab[0]+vcb[1]*vab[1])/d; + va[0] = vab[0] - vcb[0]*d; + va[1] = vab[1] - vcb[1]*d; + d = va[0]*va[0] + va[1]*va[1]; if (d <= FTINY) return(-1); - for (i = 0; i < 3; i++) { - va[i] /= d; - bcm[j][i] = va[i]; - } - bcm[j][3] = -DOT(v2,va); + bcm->tm[j][0] = va[0] /= d; + bcm->tm[j][1] = va[1] /= d; + bcm->tm[j][2] = -(v2[ax0]*va[0]+v2[ax1]*va[1]); /* rotate vertices */ vt = v1; v1 = v2; @@ -409,164 +672,16 @@ FLOAT *v1, *v2, *v3; put_baryc(bcm) /* put barycentric coord. vectors */ -register BARYCCM bcm; +register BARYCCM *bcm; { - register int i; - - for (i = 0; i < 3; i++) - printf("%14.8f %14.8f %14.8f %14.8f\n", - bcm[i][0], bcm[i][1], bcm[i][2], bcm[i][3]); + printf("\t%d\n", bcm->ax); + printf("%14.8f %14.8f %14.8f\n", + bcm->tm[0][0], bcm->tm[0][1], bcm->tm[0][2]); + printf("%14.8f %14.8f %14.8f\n", + bcm->tm[1][0], bcm->tm[1][1], bcm->tm[1][2]); } -putquad(p0, p1, p2, p3) /* put out a quadrilateral */ -char *p0, *p1, *p2, *p3; -{ - VNDX p0i, p1i, p2i, p3i; - FVECT norm[4]; - int axis; - FVECT v1, v2, vc1, vc2; - int ok1, ok2; - /* get actual indices */ - if (!cvtndx(p0i,p0) || !cvtndx(p1i,p1) || - !cvtndx(p2i,p2) || !cvtndx(p3i,p3)) - return(0); - /* compute exact normals */ - fvsum(v1, vlist[p1i[0]], vlist[p0i[0]], -1.0); - fvsum(v2, vlist[p2i[0]], vlist[p0i[0]], -1.0); - fcross(vc1, v1, v2); - ok1 = normalize(vc1) != 0.0; - fvsum(v1, vlist[p2i[0]], vlist[p3i[0]], -1.0); - fvsum(v2, vlist[p1i[0]], vlist[p3i[0]], -1.0); - fcross(vc2, v1, v2); - ok2 = normalize(vc2) != 0.0; - if (!(ok1 | ok2)) - return(-1); - /* compute normal interpolation */ - axis = norminterp(norm, p0i, p1i, p2i, p3i); - - /* put out quadrilateral? */ - if (ok1 & ok2 && fdot(vc1,vc2) >= 1.0-FTINY*FTINY) { - printf("\n%s ", matname); - if (axis != -1) { - printf("texfunc %s\n", TEXNAME); - printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME); - printf("0\n13\t%d\n", axis); - pvect(norm[0]); - pvect(norm[1]); - pvect(norm[2]); - fvsum(v1, norm[3], vc1, -0.5); - fvsum(v1, v1, vc2, -0.5); - pvect(v1); - printf("\n%s ", TEXNAME); - } - printf("polygon %s.%d\n", objname, ++nfaces); - printf("0\n0\n12\n"); - pvect(vlist[p0i[0]]); - pvect(vlist[p1i[0]]); - pvect(vlist[p3i[0]]); - pvect(vlist[p2i[0]]); - return(1); - } - /* put out triangles? */ - if (ok1) { - printf("\n%s ", matname); - if (axis != -1) { - printf("texfunc %s\n", TEXNAME); - printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME); - printf("0\n13\t%d\n", axis); - pvect(norm[0]); - pvect(norm[1]); - pvect(norm[2]); - fvsum(v1, norm[3], vc1, -1.0); - pvect(v1); - printf("\n%s ", TEXNAME); - } - printf("polygon %s.%d\n", objname, ++nfaces); - printf("0\n0\n9\n"); - pvect(vlist[p0i[0]]); - pvect(vlist[p1i[0]]); - pvect(vlist[p2i[0]]); - } - if (ok2) { - printf("\n%s ", matname); - if (axis != -1) { - printf("texfunc %s\n", TEXNAME); - printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME); - printf("0\n13\t%d\n", axis); - pvect(norm[0]); - pvect(norm[1]); - pvect(norm[2]); - fvsum(v2, norm[3], vc2, -1.0); - pvect(v2); - printf("\n%s ", TEXNAME); - } - printf("polygon %s.%d\n", objname, ++nfaces); - printf("0\n0\n9\n"); - pvect(vlist[p2i[0]]); - pvect(vlist[p1i[0]]); - pvect(vlist[p3i[0]]); - } - return(1); -} - - -int -norminterp(resmat, p0i, p1i, p2i, p3i) /* compute normal interpolation */ -register FVECT resmat[4]; -register VNDX p0i, p1i, p2i, p3i; -{ -#define u ((ax+1)%3) -#define v ((ax+2)%3) - - register int ax; - MAT4 eqnmat; - FVECT v1; - register int i, j; - - if (!(p0i[2]>=0 && p1i[2]>=0 && p2i[2]>=0 && p3i[2]>=0)) - return(-1); - /* find dominant axis */ - VCOPY(v1, vnlist[p0i[2]]); - fvsum(v1, v1, vnlist[p1i[2]], 1.0); - fvsum(v1, v1, vnlist[p2i[2]], 1.0); - fvsum(v1, v1, vnlist[p3i[2]], 1.0); - ax = ABS(v1[0]) > ABS(v1[1]) ? 0 : 1; - ax = ABS(v1[ax]) > ABS(v1[2]) ? ax : 2; - /* assign equation matrix */ - eqnmat[0][0] = vlist[p0i[0]][u]*vlist[p0i[0]][v]; - eqnmat[0][1] = vlist[p0i[0]][u]; - eqnmat[0][2] = vlist[p0i[0]][v]; - eqnmat[0][3] = 1.0; - eqnmat[1][0] = vlist[p1i[0]][u]*vlist[p1i[0]][v]; - eqnmat[1][1] = vlist[p1i[0]][u]; - eqnmat[1][2] = vlist[p1i[0]][v]; - eqnmat[1][3] = 1.0; - eqnmat[2][0] = vlist[p2i[0]][u]*vlist[p2i[0]][v]; - eqnmat[2][1] = vlist[p2i[0]][u]; - eqnmat[2][2] = vlist[p2i[0]][v]; - eqnmat[2][3] = 1.0; - eqnmat[3][0] = vlist[p3i[0]][u]*vlist[p3i[0]][v]; - eqnmat[3][1] = vlist[p3i[0]][u]; - eqnmat[3][2] = vlist[p3i[0]][v]; - eqnmat[3][3] = 1.0; - /* invert matrix (solve system) */ - if (!invmat4(eqnmat, eqnmat)) - return(-1); /* no solution */ - /* compute result matrix */ - for (j = 0; j < 4; j++) - for (i = 0; i < 3; i++) - resmat[j][i] = eqnmat[j][0]*vnlist[p0i[2]][i] + - eqnmat[j][1]*vnlist[p1i[2]][i] + - eqnmat[j][2]*vnlist[p2i[2]][i] + - eqnmat[j][3]*vnlist[p3i[2]][i]; - return(ax); - -#undef u -#undef v -} - - freeverts() /* free all vertices */ { if (nvs) { @@ -635,7 +750,7 @@ double x, y, z; int -newvt(x, y) /* create a new texture vertex */ +newvt(x, y) /* create a new texture map vertex */ double x, y; { if (!(nvts%CHUNKSIZ)) { /* allocate next block */ @@ -651,19 +766,17 @@ double x, y; exit(1); } } - /* assign new texture vertex */ + /* assign new vertex */ vtlist[nvts][0] = x; vtlist[nvts][1] = y; return(++nvts); } -syntax(fn, ln, er) /* report syntax error and exit */ -char *fn; -int ln; +syntax(er) /* report syntax error and exit */ char *er; { fprintf(stderr, "%s: Wavefront syntax error near line %d: %s\n", - fn, ln, er); + inpfile, lineno, er); exit(1); }