1 |
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/* Copyright (c) 1994 Regents of the University of California */ |
2 |
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1 |
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#ifndef lint |
2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
3 |
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#endif |
6 |
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|
4 |
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/* |
5 |
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* Convert a Wavefront .obj file to Radiance format. |
6 |
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* |
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15 |
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#include "trans.h" |
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|
17 |
+ |
#include "tmesh.h" |
18 |
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|
19 |
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#include <ctype.h> |
20 |
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|
22 |
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#define TCALNAME "tmesh.cal" /* triangle interp. file */ |
23 |
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#define QCALNAME "surf.cal" /* quad interp. file */ |
21 |
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#define PATNAME "M-pat" /* mesh pattern name (reused) */ |
22 |
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#define TEXNAME "M-nor" /* mesh texture name (reused) */ |
23 |
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#define DEFOBJ "unnamed" /* default object name */ |
24 |
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#define DEFMAT "white" /* default material name */ |
25 |
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|
29 |
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#define ABS(x) ((x)>=0 ? (x) : -(x)) |
30 |
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|
26 |
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#define pvect(v) printf("%18.12g %18.12g %18.12g\n",(v)[0],(v)[1],(v)[2]) |
27 |
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|
28 |
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FVECT *vlist; /* our vertex list */ |
32 |
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FLOAT (*vtlist)[2]; /* map vertex list */ |
33 |
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int nvts; |
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|
40 |
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typedef struct { |
41 |
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int ax; /* major axis */ |
42 |
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FLOAT tm[2][3]; /* transformation */ |
43 |
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} BARYCCM; |
44 |
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|
35 |
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typedef int VNDX[3]; /* vertex index (point,map,normal) */ |
36 |
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|
37 |
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#define CHUNKSIZ 256 /* vertex allocation chunk size */ |
230 |
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if (!puttri(argv[1], argv[2], argv[3])) |
231 |
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syntax("Bad triangle"); |
232 |
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break; |
243 |
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case 4: |
244 |
– |
if (!putquad(argv[1], argv[2], |
245 |
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argv[3], argv[4])) |
246 |
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syntax("Bad quad"); |
247 |
– |
break; |
233 |
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default: |
234 |
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if (!putface(argc-1, argv+1)) |
235 |
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syntax("Bad face"); |
477 |
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|
478 |
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if (!cvtndx(vi, av[0])) |
479 |
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return(0); |
480 |
< |
if (vi[2] >= 0) |
480 |
> |
if (!flatten && vi[2] >= 0) |
481 |
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return(1); /* has interpolated normals */ |
482 |
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if (ac < 4) |
483 |
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return(0); /* it's a triangle! */ |
524 |
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char *cp; |
525 |
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register int i; |
526 |
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|
527 |
< |
if (nonplanar(ac, av)) { /* break into quads and triangles */ |
528 |
< |
while (ac > 3) { |
529 |
< |
if (!putquad(av[0], av[1], av[2], av[3])) |
527 |
> |
if (nonplanar(ac, av)) { /* break into triangles */ |
528 |
> |
while (ac > 2) { |
529 |
> |
if (!puttri(av[0], av[1], av[2])) |
530 |
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return(0); |
531 |
< |
ac -= 2; /* remove two vertices & rotate */ |
531 |
> |
ac--; /* remove vertex & rotate */ |
532 |
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cp = av[0]; |
533 |
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for (i = 0; i < ac-1; i++) |
534 |
< |
av[i] = av[i+3]; |
534 |
> |
av[i] = av[i+2]; |
535 |
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av[i] = cp; |
536 |
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} |
552 |
– |
if (ac == 3 && !puttri(av[0], av[1], av[2])) |
553 |
– |
return(0); |
537 |
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return(1); |
538 |
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} |
539 |
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if ((cp = getmtl()) == NULL) |
555 |
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char *mod; |
556 |
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VNDX v1i, v2i, v3i; |
557 |
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BARYCCM bvecs; |
558 |
+ |
FLOAT bcoor[3][3]; |
559 |
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int texOK, patOK; |
560 |
+ |
int flatness; |
561 |
+ |
register int i; |
562 |
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|
563 |
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if ((mod = getmtl()) == NULL) |
564 |
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return(-1); |
566 |
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if (!cvtndx(v1i, v1) || !cvtndx(v2i, v2) || !cvtndx(v3i, v3)) |
567 |
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return(0); |
568 |
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/* compute barycentric coordinates */ |
569 |
< |
texOK = !flatten && (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=0); |
569 |
> |
if (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=0) |
570 |
> |
flatness = flat_tri(vlist[v1i[0]], vlist[v2i[0]], vlist[v3i[0]], |
571 |
> |
vnlist[v1i[2]], vnlist[v2i[2]], vnlist[v3i[2]]); |
572 |
> |
else |
573 |
> |
flatness = ISFLAT; |
574 |
> |
|
575 |
> |
switch (flatness) { |
576 |
> |
case DEGEN: /* zero area */ |
577 |
> |
return(-1); |
578 |
> |
case RVFLAT: /* reversed normals, but flat */ |
579 |
> |
case ISFLAT: /* smoothing unnecessary */ |
580 |
> |
texOK = 0; |
581 |
> |
break; |
582 |
> |
case RVBENT: /* reversed normals with smoothing */ |
583 |
> |
case ISBENT: /* proper smoothing */ |
584 |
> |
texOK = 1; |
585 |
> |
break; |
586 |
> |
} |
587 |
> |
if (flatten) |
588 |
> |
texOK = 0; |
589 |
|
#ifdef TEXMAPS |
590 |
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patOK = mapname[0] && (v1i[1]>=0 && v2i[1]>=0 && v3i[1]>=0); |
591 |
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#else |
600 |
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printf("\n%s texfunc %s\n", mod, TEXNAME); |
601 |
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mod = TEXNAME; |
602 |
|
printf("4 dx dy dz %s\n", TCALNAME); |
603 |
< |
printf("0\n16 "); |
604 |
< |
put_baryc(&bvecs); |
605 |
< |
printf("\t%14.12g %14.12g %14.12g\n", |
606 |
< |
vnlist[v1i[2]][0], vnlist[v2i[2]][0], |
607 |
< |
vnlist[v3i[2]][0]); |
608 |
< |
printf("\t%14.12g %14.12g %14.12g\n", |
609 |
< |
vnlist[v1i[2]][1], vnlist[v2i[2]][1], |
605 |
< |
vnlist[v3i[2]][1]); |
606 |
< |
printf("\t%14.12g %14.12g %14.12g\n", |
607 |
< |
vnlist[v1i[2]][2], vnlist[v2i[2]][2], |
608 |
< |
vnlist[v3i[2]][2]); |
603 |
> |
printf("0\n"); |
604 |
> |
for (i = 0; i < 3; i++) { |
605 |
> |
bcoor[i][0] = vnlist[v1i[2]][i]; |
606 |
> |
bcoor[i][1] = vnlist[v2i[2]][i]; |
607 |
> |
bcoor[i][2] = vnlist[v3i[2]][i]; |
608 |
> |
} |
609 |
> |
put_baryc(&bvecs, bcoor, 3); |
610 |
|
} |
611 |
|
#ifdef TEXMAPS |
612 |
|
/* put out pattern (if any) */ |
614 |
|
printf("\n%s colorpict %s\n", mod, PATNAME); |
615 |
|
mod = PATNAME; |
616 |
|
printf("7 noneg noneg noneg %s %s u v\n", mapname, TCALNAME); |
617 |
< |
printf("0\n13 "); |
618 |
< |
put_baryc(&bvecs); |
619 |
< |
printf("\t%f %f %f\n", vtlist[v1i[1]][0], |
620 |
< |
vtlist[v2i[1]][0], vtlist[v3i[1]][0]); |
621 |
< |
printf("\t%f %f %f\n", vtlist[v1i[1]][1], |
622 |
< |
vtlist[v2i[1]][1], vtlist[v3i[1]][1]); |
617 |
> |
printf("0\n"); |
618 |
> |
for (i = 0; i < 2; i++) { |
619 |
> |
bcoor[i][0] = vtlist[v1i[1]][i]; |
620 |
> |
bcoor[i][1] = vtlist[v2i[1]][i]; |
621 |
> |
bcoor[i][2] = vtlist[v3i[1]][i]; |
622 |
> |
} |
623 |
> |
put_baryc(&bvecs, bcoor, 2); |
624 |
|
} |
625 |
|
#endif |
626 |
< |
/* put out triangle */ |
626 |
> |
/* put out (reversed) triangle */ |
627 |
|
printf("\n%s polygon %s.%d\n", mod, getonm(), faceno); |
628 |
|
printf("0\n0\n9\n"); |
629 |
< |
pvect(vlist[v1i[0]]); |
630 |
< |
pvect(vlist[v2i[0]]); |
631 |
< |
pvect(vlist[v3i[0]]); |
632 |
< |
|
633 |
< |
return(1); |
634 |
< |
} |
635 |
< |
|
636 |
< |
|
635 |
< |
int |
636 |
< |
comp_baryc(bcm, v1, v2, v3) /* compute barycentric vectors */ |
637 |
< |
register BARYCCM *bcm; |
638 |
< |
FLOAT *v1, *v2, *v3; |
639 |
< |
{ |
640 |
< |
FLOAT *vt; |
641 |
< |
FVECT va, vab, vcb; |
642 |
< |
double d; |
643 |
< |
int ax0, ax1; |
644 |
< |
register int i, j; |
645 |
< |
/* compute major axis */ |
646 |
< |
for (i = 0; i < 3; i++) { |
647 |
< |
vab[i] = v1[i] - v2[i]; |
648 |
< |
vcb[i] = v3[i] - v2[i]; |
629 |
> |
if (flatness == RVFLAT || flatness == RVBENT) { |
630 |
> |
pvect(vlist[v3i[0]]); |
631 |
> |
pvect(vlist[v2i[0]]); |
632 |
> |
pvect(vlist[v1i[0]]); |
633 |
> |
} else { |
634 |
> |
pvect(vlist[v1i[0]]); |
635 |
> |
pvect(vlist[v2i[0]]); |
636 |
> |
pvect(vlist[v3i[0]]); |
637 |
|
} |
650 |
– |
fcross(va, vab, vcb); |
651 |
– |
bcm->ax = ABS(va[0]) > ABS(va[1]) ? 0 : 1; |
652 |
– |
bcm->ax = ABS(va[bcm->ax]) > ABS(va[2]) ? bcm->ax : 2; |
653 |
– |
ax0 = (bcm->ax + 1) % 3; |
654 |
– |
ax1 = (bcm->ax + 2) % 3; |
655 |
– |
for (j = 0; j < 2; j++) { |
656 |
– |
vab[0] = v1[ax0] - v2[ax0]; |
657 |
– |
vcb[0] = v3[ax0] - v2[ax0]; |
658 |
– |
vab[1] = v1[ax1] - v2[ax1]; |
659 |
– |
vcb[1] = v3[ax1] - v2[ax1]; |
660 |
– |
d = vcb[0]*vcb[0] + vcb[1]*vcb[1]; |
661 |
– |
if (d <= FTINY) |
662 |
– |
return(-1); |
663 |
– |
d = (vcb[0]*vab[0]+vcb[1]*vab[1])/d; |
664 |
– |
va[0] = vab[0] - vcb[0]*d; |
665 |
– |
va[1] = vab[1] - vcb[1]*d; |
666 |
– |
d = va[0]*va[0] + va[1]*va[1]; |
667 |
– |
if (d <= FTINY) |
668 |
– |
return(-1); |
669 |
– |
bcm->tm[j][0] = va[0] /= d; |
670 |
– |
bcm->tm[j][1] = va[1] /= d; |
671 |
– |
bcm->tm[j][2] = -(v2[ax0]*va[0]+v2[ax1]*va[1]); |
672 |
– |
/* rotate vertices */ |
673 |
– |
vt = v1; |
674 |
– |
v1 = v2; |
675 |
– |
v2 = v3; |
676 |
– |
v3 = vt; |
677 |
– |
} |
678 |
– |
return(0); |
679 |
– |
} |
680 |
– |
|
681 |
– |
|
682 |
– |
put_baryc(bcm) /* put barycentric coord. vectors */ |
683 |
– |
register BARYCCM *bcm; |
684 |
– |
{ |
685 |
– |
printf("\t%d\n", bcm->ax); |
686 |
– |
printf("%14.8f %14.8f %14.8f\n", |
687 |
– |
bcm->tm[0][0], bcm->tm[0][1], bcm->tm[0][2]); |
688 |
– |
printf("%14.8f %14.8f %14.8f\n", |
689 |
– |
bcm->tm[1][0], bcm->tm[1][1], bcm->tm[1][2]); |
690 |
– |
} |
691 |
– |
|
692 |
– |
|
693 |
– |
putquad(p0, p1, p3, p2) /* put out a quadrilateral */ |
694 |
– |
char *p0, *p1, *p3, *p2; /* names correspond to binary pos. */ |
695 |
– |
{ |
696 |
– |
VNDX p0i, p1i, p2i, p3i; |
697 |
– |
FVECT norm[4]; |
698 |
– |
char *mod, *name; |
699 |
– |
int axis; |
700 |
– |
FVECT v1, v2, vc1, vc2; |
701 |
– |
int ok1, ok2; |
702 |
– |
|
703 |
– |
#ifdef TEXMAPS |
704 |
– |
/* also should output texture index coordinates, |
705 |
– |
* which will require new .cal file |
706 |
– |
*/ |
707 |
– |
#endif |
708 |
– |
if ((mod = getmtl()) == NULL) |
709 |
– |
return(-1); |
710 |
– |
name = getonm(); |
711 |
– |
/* get actual indices */ |
712 |
– |
if (!cvtndx(p0i,p0) || !cvtndx(p1i,p1) || |
713 |
– |
!cvtndx(p2i,p2) || !cvtndx(p3i,p3)) |
714 |
– |
return(0); |
715 |
– |
/* compute exact normals */ |
716 |
– |
fvsum(v1, vlist[p1i[0]], vlist[p0i[0]], -1.0); |
717 |
– |
fvsum(v2, vlist[p2i[0]], vlist[p0i[0]], -1.0); |
718 |
– |
fcross(vc1, v1, v2); |
719 |
– |
ok1 = normalize(vc1) != 0.0; |
720 |
– |
fvsum(v1, vlist[p2i[0]], vlist[p3i[0]], -1.0); |
721 |
– |
fvsum(v2, vlist[p1i[0]], vlist[p3i[0]], -1.0); |
722 |
– |
fcross(vc2, v1, v2); |
723 |
– |
ok2 = normalize(vc2) != 0.0; |
724 |
– |
if (!(ok1 | ok2)) |
725 |
– |
return(-1); |
726 |
– |
/* compute normal interpolation */ |
727 |
– |
axis = norminterp(norm, p0i, p1i, p2i, p3i); |
728 |
– |
|
729 |
– |
/* put out quadrilateral? */ |
730 |
– |
if (ok1 & ok2 && fabs(fdot(vc1,vc2)) >= 1.0-FTINY) { |
731 |
– |
printf("\n%s ", mod); |
732 |
– |
if (axis != -1) { |
733 |
– |
printf("texfunc %s\n", TEXNAME); |
734 |
– |
printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME); |
735 |
– |
printf("0\n13\t%d\n", axis); |
736 |
– |
pvect(norm[0]); |
737 |
– |
pvect(norm[1]); |
738 |
– |
pvect(norm[2]); |
739 |
– |
fvsum(v1, norm[3], vc1, -0.5); |
740 |
– |
fvsum(v1, v1, vc2, -0.5); |
741 |
– |
pvect(v1); |
742 |
– |
printf("\n%s ", TEXNAME); |
743 |
– |
} |
744 |
– |
printf("polygon %s.%d\n", name, faceno); |
745 |
– |
printf("0\n0\n12\n"); |
746 |
– |
pvect(vlist[p0i[0]]); |
747 |
– |
pvect(vlist[p1i[0]]); |
748 |
– |
pvect(vlist[p3i[0]]); |
749 |
– |
pvect(vlist[p2i[0]]); |
750 |
– |
return(1); |
751 |
– |
} |
752 |
– |
/* put out triangles? */ |
753 |
– |
if (ok1) { |
754 |
– |
printf("\n%s ", mod); |
755 |
– |
if (axis != -1) { |
756 |
– |
printf("texfunc %s\n", TEXNAME); |
757 |
– |
printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME); |
758 |
– |
printf("0\n13\t%d\n", axis); |
759 |
– |
pvect(norm[0]); |
760 |
– |
pvect(norm[1]); |
761 |
– |
pvect(norm[2]); |
762 |
– |
fvsum(v1, norm[3], vc1, -1.0); |
763 |
– |
pvect(v1); |
764 |
– |
printf("\n%s ", TEXNAME); |
765 |
– |
} |
766 |
– |
printf("polygon %s.%da\n", name, faceno); |
767 |
– |
printf("0\n0\n9\n"); |
768 |
– |
pvect(vlist[p0i[0]]); |
769 |
– |
pvect(vlist[p1i[0]]); |
770 |
– |
pvect(vlist[p2i[0]]); |
771 |
– |
} |
772 |
– |
if (ok2) { |
773 |
– |
printf("\n%s ", mod); |
774 |
– |
if (axis != -1) { |
775 |
– |
printf("texfunc %s\n", TEXNAME); |
776 |
– |
printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME); |
777 |
– |
printf("0\n13\t%d\n", axis); |
778 |
– |
pvect(norm[0]); |
779 |
– |
pvect(norm[1]); |
780 |
– |
pvect(norm[2]); |
781 |
– |
fvsum(v2, norm[3], vc2, -1.0); |
782 |
– |
pvect(v2); |
783 |
– |
printf("\n%s ", TEXNAME); |
784 |
– |
} |
785 |
– |
printf("polygon %s.%db\n", name, faceno); |
786 |
– |
printf("0\n0\n9\n"); |
787 |
– |
pvect(vlist[p2i[0]]); |
788 |
– |
pvect(vlist[p1i[0]]); |
789 |
– |
pvect(vlist[p3i[0]]); |
790 |
– |
} |
638 |
|
return(1); |
639 |
|
} |
640 |
|
|
641 |
|
|
795 |
– |
int |
796 |
– |
norminterp(resmat, p0i, p1i, p2i, p3i) /* compute normal interpolation */ |
797 |
– |
register FVECT resmat[4]; |
798 |
– |
register VNDX p0i, p1i, p2i, p3i; |
799 |
– |
{ |
800 |
– |
#define u ((ax+1)%3) |
801 |
– |
#define v ((ax+2)%3) |
802 |
– |
|
803 |
– |
register int ax; |
804 |
– |
MAT4 eqnmat; |
805 |
– |
FVECT v1; |
806 |
– |
register int i, j; |
807 |
– |
|
808 |
– |
#ifdef TEXMAPS |
809 |
– |
/* also check for texture indices */ |
810 |
– |
#endif |
811 |
– |
if (flatten || !(p0i[2]>=0 && p1i[2]>=0 && p2i[2]>=0 && p3i[2]>=0)) |
812 |
– |
return(-1); |
813 |
– |
/* find dominant axis */ |
814 |
– |
VCOPY(v1, vnlist[p0i[2]]); |
815 |
– |
fvsum(v1, v1, vnlist[p1i[2]], 1.0); |
816 |
– |
fvsum(v1, v1, vnlist[p2i[2]], 1.0); |
817 |
– |
fvsum(v1, v1, vnlist[p3i[2]], 1.0); |
818 |
– |
ax = ABS(v1[0]) > ABS(v1[1]) ? 0 : 1; |
819 |
– |
ax = ABS(v1[ax]) > ABS(v1[2]) ? ax : 2; |
820 |
– |
/* assign equation matrix */ |
821 |
– |
eqnmat[0][0] = vlist[p0i[0]][u]*vlist[p0i[0]][v]; |
822 |
– |
eqnmat[0][1] = vlist[p0i[0]][u]; |
823 |
– |
eqnmat[0][2] = vlist[p0i[0]][v]; |
824 |
– |
eqnmat[0][3] = 1.0; |
825 |
– |
eqnmat[1][0] = vlist[p1i[0]][u]*vlist[p1i[0]][v]; |
826 |
– |
eqnmat[1][1] = vlist[p1i[0]][u]; |
827 |
– |
eqnmat[1][2] = vlist[p1i[0]][v]; |
828 |
– |
eqnmat[1][3] = 1.0; |
829 |
– |
eqnmat[2][0] = vlist[p2i[0]][u]*vlist[p2i[0]][v]; |
830 |
– |
eqnmat[2][1] = vlist[p2i[0]][u]; |
831 |
– |
eqnmat[2][2] = vlist[p2i[0]][v]; |
832 |
– |
eqnmat[2][3] = 1.0; |
833 |
– |
eqnmat[3][0] = vlist[p3i[0]][u]*vlist[p3i[0]][v]; |
834 |
– |
eqnmat[3][1] = vlist[p3i[0]][u]; |
835 |
– |
eqnmat[3][2] = vlist[p3i[0]][v]; |
836 |
– |
eqnmat[3][3] = 1.0; |
837 |
– |
/* invert matrix (solve system) */ |
838 |
– |
if (!invmat4(eqnmat, eqnmat)) |
839 |
– |
return(-1); /* no solution */ |
840 |
– |
/* compute result matrix */ |
841 |
– |
for (j = 0; j < 4; j++) |
842 |
– |
for (i = 0; i < 3; i++) |
843 |
– |
resmat[j][i] = eqnmat[j][0]*vnlist[p0i[2]][i] + |
844 |
– |
eqnmat[j][1]*vnlist[p1i[2]][i] + |
845 |
– |
eqnmat[j][2]*vnlist[p2i[2]][i] + |
846 |
– |
eqnmat[j][3]*vnlist[p3i[2]][i]; |
847 |
– |
#ifdef TEXMAPS |
848 |
– |
/* compute result matrix for texture indices */ |
849 |
– |
#endif |
850 |
– |
return(ax); |
851 |
– |
|
852 |
– |
#undef u |
853 |
– |
#undef v |
854 |
– |
} |
855 |
– |
|
856 |
– |
|
642 |
|
freeverts() /* free all vertices */ |
643 |
|
{ |
644 |
|
if (nvs) { |
645 |
< |
free((char *)vlist); |
645 |
> |
free((void *)vlist); |
646 |
|
nvs = 0; |
647 |
|
} |
648 |
|
if (nvts) { |
649 |
< |
free((char *)vtlist); |
649 |
> |
free((void *)vtlist); |
650 |
|
nvts = 0; |
651 |
|
} |
652 |
|
if (nvns) { |
653 |
< |
free((char *)vnlist); |
653 |
> |
free((void *)vnlist); |
654 |
|
nvns = 0; |
655 |
|
} |
656 |
|
} |
664 |
|
if (nvs == 0) |
665 |
|
vlist = (FVECT *)malloc(CHUNKSIZ*sizeof(FVECT)); |
666 |
|
else |
667 |
< |
vlist = (FVECT *)realloc((char *)vlist, |
667 |
> |
vlist = (FVECT *)realloc((void *)vlist, |
668 |
|
(nvs+CHUNKSIZ)*sizeof(FVECT)); |
669 |
|
if (vlist == NULL) { |
670 |
|
fprintf(stderr, |
688 |
|
if (nvns == 0) |
689 |
|
vnlist = (FVECT *)malloc(CHUNKSIZ*sizeof(FVECT)); |
690 |
|
else |
691 |
< |
vnlist = (FVECT *)realloc((char *)vnlist, |
691 |
> |
vnlist = (FVECT *)realloc((void *)vnlist, |
692 |
|
(nvns+CHUNKSIZ)*sizeof(FVECT)); |
693 |
|
if (vnlist == NULL) { |
694 |
|
fprintf(stderr, |
714 |
|
if (nvts == 0) |
715 |
|
vtlist = (FLOAT (*)[2])malloc(CHUNKSIZ*2*sizeof(FLOAT)); |
716 |
|
else |
717 |
< |
vtlist = (FLOAT (*)[2])realloc((char *)vtlist, |
717 |
> |
vtlist = (FLOAT (*)[2])realloc((void *)vtlist, |
718 |
|
(nvts+CHUNKSIZ)*2*sizeof(FLOAT)); |
719 |
|
if (vtlist == NULL) { |
720 |
|
fprintf(stderr, |