| 17 |
|
|
| 18 |
|
#include "trans.h" |
| 19 |
|
|
| 20 |
+ |
#include "tmesh.h" |
| 21 |
+ |
|
| 22 |
|
#include <ctype.h> |
| 23 |
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|
| 22 |
– |
#define TCALNAME "tmesh.cal" /* triangle interp. file */ |
| 24 |
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#define PATNAME "M-pat" /* mesh pattern name (reused) */ |
| 25 |
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#define TEXNAME "M-nor" /* mesh texture name (reused) */ |
| 26 |
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#define DEFOBJ "unnamed" /* default object name */ |
| 27 |
|
#define DEFMAT "white" /* default material name */ |
| 28 |
|
|
| 28 |
– |
#define ABS(x) ((x)>=0 ? (x) : -(x)) |
| 29 |
– |
|
| 29 |
|
#define pvect(v) printf("%18.12g %18.12g %18.12g\n",(v)[0],(v)[1],(v)[2]) |
| 30 |
|
|
| 31 |
|
FVECT *vlist; /* our vertex list */ |
| 35 |
|
FLOAT (*vtlist)[2]; /* map vertex list */ |
| 36 |
|
int nvts; |
| 37 |
|
|
| 39 |
– |
typedef struct { |
| 40 |
– |
int ax; /* major axis */ |
| 41 |
– |
FLOAT tm[2][3]; /* transformation */ |
| 42 |
– |
} BARYCCM; |
| 43 |
– |
|
| 38 |
|
typedef int VNDX[3]; /* vertex index (point,map,normal) */ |
| 39 |
|
|
| 40 |
|
#define CHUNKSIZ 256 /* vertex allocation chunk size */ |
| 614 |
|
pvect(vlist[v3i[0]]); |
| 615 |
|
|
| 616 |
|
return(1); |
| 623 |
– |
} |
| 624 |
– |
|
| 625 |
– |
|
| 626 |
– |
int |
| 627 |
– |
comp_baryc(bcm, v1, v2, v3) /* compute barycentric vectors */ |
| 628 |
– |
register BARYCCM *bcm; |
| 629 |
– |
FLOAT *v1, *v2, *v3; |
| 630 |
– |
{ |
| 631 |
– |
FLOAT *vt; |
| 632 |
– |
FVECT va, vab, vcb; |
| 633 |
– |
double d; |
| 634 |
– |
int ax0, ax1; |
| 635 |
– |
register int i, j; |
| 636 |
– |
/* compute major axis */ |
| 637 |
– |
for (i = 0; i < 3; i++) { |
| 638 |
– |
vab[i] = v1[i] - v2[i]; |
| 639 |
– |
vcb[i] = v3[i] - v2[i]; |
| 640 |
– |
} |
| 641 |
– |
fcross(va, vab, vcb); |
| 642 |
– |
bcm->ax = ABS(va[0]) > ABS(va[1]) ? 0 : 1; |
| 643 |
– |
bcm->ax = ABS(va[bcm->ax]) > ABS(va[2]) ? bcm->ax : 2; |
| 644 |
– |
ax0 = (bcm->ax + 1) % 3; |
| 645 |
– |
ax1 = (bcm->ax + 2) % 3; |
| 646 |
– |
for (j = 0; j < 2; j++) { |
| 647 |
– |
vab[0] = v1[ax0] - v2[ax0]; |
| 648 |
– |
vcb[0] = v3[ax0] - v2[ax0]; |
| 649 |
– |
vab[1] = v1[ax1] - v2[ax1]; |
| 650 |
– |
vcb[1] = v3[ax1] - v2[ax1]; |
| 651 |
– |
d = vcb[0]*vcb[0] + vcb[1]*vcb[1]; |
| 652 |
– |
if (d <= FTINY) |
| 653 |
– |
return(-1); |
| 654 |
– |
d = (vcb[0]*vab[0]+vcb[1]*vab[1])/d; |
| 655 |
– |
va[0] = vab[0] - vcb[0]*d; |
| 656 |
– |
va[1] = vab[1] - vcb[1]*d; |
| 657 |
– |
d = va[0]*va[0] + va[1]*va[1]; |
| 658 |
– |
if (d <= FTINY) |
| 659 |
– |
return(-1); |
| 660 |
– |
bcm->tm[j][0] = va[0] /= d; |
| 661 |
– |
bcm->tm[j][1] = va[1] /= d; |
| 662 |
– |
bcm->tm[j][2] = -(v2[ax0]*va[0]+v2[ax1]*va[1]); |
| 663 |
– |
/* rotate vertices */ |
| 664 |
– |
vt = v1; |
| 665 |
– |
v1 = v2; |
| 666 |
– |
v2 = v3; |
| 667 |
– |
v3 = vt; |
| 668 |
– |
} |
| 669 |
– |
return(0); |
| 670 |
– |
} |
| 671 |
– |
|
| 672 |
– |
|
| 673 |
– |
put_baryc(bcm, com, n) /* put barycentric coord. vectors */ |
| 674 |
– |
register BARYCCM *bcm; |
| 675 |
– |
register FLOAT com[][3]; |
| 676 |
– |
int n; |
| 677 |
– |
{ |
| 678 |
– |
double a, b; |
| 679 |
– |
register int i, j; |
| 680 |
– |
|
| 681 |
– |
printf("%d\t%d\n", 1+3*n, bcm->ax); |
| 682 |
– |
for (i = 0; i < n; i++) { |
| 683 |
– |
a = com[i][0] - com[i][2]; |
| 684 |
– |
b = com[i][1] - com[i][2]; |
| 685 |
– |
printf("%14.8f %14.8f %14.8f\n", |
| 686 |
– |
bcm->tm[0][0]*a + bcm->tm[1][0]*b, |
| 687 |
– |
bcm->tm[0][1]*a + bcm->tm[1][1]*b, |
| 688 |
– |
bcm->tm[0][2]*a + bcm->tm[1][2]*b + com[i][2]); |
| 689 |
– |
} |
| 617 |
|
} |
| 618 |
|
|
| 619 |
|
|
