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#include "trans.h" |
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#include "tmesh.h" |
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#include <ctype.h> |
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#define TCALNAME "tmesh.cal" /* triangle interp. file */ |
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#define PATNAME "M-pat" /* mesh pattern name (reused) */ |
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#define TEXNAME "M-nor" /* mesh texture name (reused) */ |
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#define DEFOBJ "unnamed" /* default object name */ |
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#define DEFMAT "white" /* default material name */ |
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|
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#define ABS(x) ((x)>=0 ? (x) : -(x)) |
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|
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#define pvect(v) printf("%18.12g %18.12g %18.12g\n",(v)[0],(v)[1],(v)[2]) |
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FVECT *vlist; /* our vertex list */ |
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FLOAT (*vtlist)[2]; /* map vertex list */ |
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int nvts; |
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typedef struct { |
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int ax; /* major axis */ |
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FLOAT tm[2][3]; /* transformation */ |
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} BARYCCM; |
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typedef int VNDX[3]; /* vertex index (point,map,normal) */ |
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#define CHUNKSIZ 256 /* vertex allocation chunk size */ |
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if (!cvtndx(vi, av[0])) |
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return(0); |
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if (vi[2] >= 0) |
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if (!flatten && vi[2] >= 0) |
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return(1); /* has interpolated normals */ |
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if (ac < 4) |
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return(0); /* it's a triangle! */ |
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char *mod; |
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VNDX v1i, v2i, v3i; |
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BARYCCM bvecs; |
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FLOAT bcoor[3][3]; |
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int texOK, patOK; |
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register int i; |
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if ((mod = getmtl()) == NULL) |
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return(-1); |
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printf("\n%s texfunc %s\n", mod, TEXNAME); |
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mod = TEXNAME; |
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printf("4 dx dy dz %s\n", TCALNAME); |
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printf("0\n16 "); |
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put_baryc(&bvecs); |
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< |
printf("\t%14.12g %14.12g %14.12g\n", |
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< |
vnlist[v1i[2]][0], vnlist[v2i[2]][0], |
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< |
vnlist[v3i[2]][0]); |
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< |
printf("\t%14.12g %14.12g %14.12g\n", |
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vnlist[v1i[2]][1], vnlist[v2i[2]][1], |
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< |
vnlist[v3i[2]][1]); |
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< |
printf("\t%14.12g %14.12g %14.12g\n", |
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< |
vnlist[v1i[2]][2], vnlist[v2i[2]][2], |
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< |
vnlist[v3i[2]][2]); |
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> |
printf("0\n"); |
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> |
for (i = 0; i < 3; i++) { |
| 588 |
> |
bcoor[i][0] = vnlist[v1i[2]][i]; |
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> |
bcoor[i][1] = vnlist[v2i[2]][i]; |
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> |
bcoor[i][2] = vnlist[v3i[2]][i]; |
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> |
} |
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> |
put_baryc(&bvecs, bcoor, 3); |
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} |
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#ifdef TEXMAPS |
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/* put out pattern (if any) */ |
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printf("\n%s colorpict %s\n", mod, PATNAME); |
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mod = PATNAME; |
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printf("7 noneg noneg noneg %s %s u v\n", mapname, TCALNAME); |
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< |
printf("0\n13 "); |
| 601 |
< |
put_baryc(&bvecs); |
| 602 |
< |
printf("\t%f %f %f\n", vtlist[v1i[1]][0], |
| 603 |
< |
vtlist[v2i[1]][0], vtlist[v3i[1]][0]); |
| 604 |
< |
printf("\t%f %f %f\n", vtlist[v1i[1]][1], |
| 605 |
< |
vtlist[v2i[1]][1], vtlist[v3i[1]][1]); |
| 600 |
> |
printf("0\n"); |
| 601 |
> |
for (i = 0; i < 2; i++) { |
| 602 |
> |
bcoor[i][0] = vtlist[v1i[1]][i]; |
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> |
bcoor[i][1] = vtlist[v2i[1]][i]; |
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> |
bcoor[i][2] = vtlist[v3i[1]][i]; |
| 605 |
> |
} |
| 606 |
> |
put_baryc(&bvecs, bcoor, 2); |
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} |
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#endif |
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/* put out triangle */ |
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pvect(vlist[v3i[0]]); |
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|
| 616 |
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return(1); |
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} |
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|
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|
| 627 |
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int |
| 628 |
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comp_baryc(bcm, v1, v2, v3) /* compute barycentric vectors */ |
| 629 |
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register BARYCCM *bcm; |
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FLOAT *v1, *v2, *v3; |
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{ |
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FLOAT *vt; |
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FVECT va, vab, vcb; |
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double d; |
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int ax0, ax1; |
| 636 |
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register int i, j; |
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/* compute major axis */ |
| 638 |
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for (i = 0; i < 3; i++) { |
| 639 |
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vab[i] = v1[i] - v2[i]; |
| 640 |
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vcb[i] = v3[i] - v2[i]; |
| 641 |
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} |
| 642 |
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fcross(va, vab, vcb); |
| 643 |
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bcm->ax = ABS(va[0]) > ABS(va[1]) ? 0 : 1; |
| 644 |
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bcm->ax = ABS(va[bcm->ax]) > ABS(va[2]) ? bcm->ax : 2; |
| 645 |
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ax0 = (bcm->ax + 1) % 3; |
| 646 |
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ax1 = (bcm->ax + 2) % 3; |
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for (j = 0; j < 2; j++) { |
| 648 |
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vab[0] = v1[ax0] - v2[ax0]; |
| 649 |
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vcb[0] = v3[ax0] - v2[ax0]; |
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vab[1] = v1[ax1] - v2[ax1]; |
| 651 |
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vcb[1] = v3[ax1] - v2[ax1]; |
| 652 |
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d = vcb[0]*vcb[0] + vcb[1]*vcb[1]; |
| 653 |
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if (d <= FTINY) |
| 654 |
– |
return(-1); |
| 655 |
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d = (vcb[0]*vab[0]+vcb[1]*vab[1])/d; |
| 656 |
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va[0] = vab[0] - vcb[0]*d; |
| 657 |
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va[1] = vab[1] - vcb[1]*d; |
| 658 |
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d = va[0]*va[0] + va[1]*va[1]; |
| 659 |
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if (d <= FTINY) |
| 660 |
– |
return(-1); |
| 661 |
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bcm->tm[j][0] = va[0] /= d; |
| 662 |
– |
bcm->tm[j][1] = va[1] /= d; |
| 663 |
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bcm->tm[j][2] = -(v2[ax0]*va[0]+v2[ax1]*va[1]); |
| 664 |
– |
/* rotate vertices */ |
| 665 |
– |
vt = v1; |
| 666 |
– |
v1 = v2; |
| 667 |
– |
v2 = v3; |
| 668 |
– |
v3 = vt; |
| 669 |
– |
} |
| 670 |
– |
return(0); |
| 671 |
– |
} |
| 672 |
– |
|
| 673 |
– |
|
| 674 |
– |
put_baryc(bcm) /* put barycentric coord. vectors */ |
| 675 |
– |
register BARYCCM *bcm; |
| 676 |
– |
{ |
| 677 |
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printf("\t%d\n", bcm->ax); |
| 678 |
– |
printf("%14.8f %14.8f %14.8f\n", |
| 679 |
– |
bcm->tm[0][0], bcm->tm[0][1], bcm->tm[0][2]); |
| 680 |
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printf("%14.8f %14.8f %14.8f\n", |
| 681 |
– |
bcm->tm[1][0], bcm->tm[1][1], bcm->tm[1][2]); |
| 617 |
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} |
| 618 |
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|
| 619 |
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