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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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#define ABS(x) ((x)>=0 ? (x) : -(x)) |
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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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pvect(vlist[v3i[0]]); |
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return(1); |
623 |
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} |
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|
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int |
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comp_baryc(bcm, v1, v2, v3) /* compute barycentric vectors */ |
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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; |
633 |
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double d; |
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int ax0, ax1; |
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register int i, j; |
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/* compute major axis */ |
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for (i = 0; i < 3; i++) { |
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vab[i] = v1[i] - v2[i]; |
639 |
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vcb[i] = v3[i] - v2[i]; |
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} |
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fcross(va, vab, vcb); |
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bcm->ax = ABS(va[0]) > ABS(va[1]) ? 0 : 1; |
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bcm->ax = ABS(va[bcm->ax]) > ABS(va[2]) ? bcm->ax : 2; |
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ax0 = (bcm->ax + 1) % 3; |
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ax1 = (bcm->ax + 2) % 3; |
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for (j = 0; j < 2; j++) { |
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vab[0] = v1[ax0] - v2[ax0]; |
648 |
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vcb[0] = v3[ax0] - v2[ax0]; |
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vab[1] = v1[ax1] - v2[ax1]; |
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vcb[1] = v3[ax1] - v2[ax1]; |
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d = vcb[0]*vcb[0] + vcb[1]*vcb[1]; |
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if (d <= FTINY) |
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return(-1); |
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d = (vcb[0]*vab[0]+vcb[1]*vab[1])/d; |
655 |
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va[0] = vab[0] - vcb[0]*d; |
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va[1] = vab[1] - vcb[1]*d; |
657 |
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d = va[0]*va[0] + va[1]*va[1]; |
658 |
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if (d <= FTINY) |
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return(-1); |
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bcm->tm[j][0] = va[0] /= d; |
661 |
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bcm->tm[j][1] = va[1] /= d; |
662 |
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bcm->tm[j][2] = -(v2[ax0]*va[0]+v2[ax1]*va[1]); |
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/* rotate vertices */ |
664 |
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vt = v1; |
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v1 = v2; |
666 |
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v2 = v3; |
667 |
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v3 = vt; |
668 |
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} |
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return(0); |
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} |
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|
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|
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put_baryc(bcm, com, n) /* put barycentric coord. vectors */ |
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register BARYCCM *bcm; |
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register FLOAT com[][3]; |
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int n; |
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{ |
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double a, b; |
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register int i, j; |
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|
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printf("%d\t%d\n", 1+3*n, bcm->ax); |
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for (i = 0; i < n; i++) { |
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a = com[i][0] - com[i][2]; |
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b = com[i][1] - com[i][2]; |
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printf("%14.8f %14.8f %14.8f\n", |
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bcm->tm[0][0]*a + bcm->tm[1][0]*b, |
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bcm->tm[0][1]*a + bcm->tm[1][1]*b, |
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bcm->tm[0][2]*a + bcm->tm[1][2]*b + com[i][2]); |
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} |
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} |
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