| 34 |
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| 35 |
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#include "standard.h" |
| 36 |
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| 37 |
+ |
#define ABS(x) ((x)>=0 ? (x) : -(x)) |
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+ |
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| 39 |
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#define VOIDID "void" /* this is defined in object.h */ |
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#define CALNAME "tmesh.cal" /* the name of our auxiliary file */ |
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VERTEX *vlist = NULL; /* our vertex list */ |
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int nverts = 0; /* number of vertices in our list */ |
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|
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< |
typedef FLOAT BARYCCM[3][4]; |
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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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#define novert(i) ((i)<0|(i)>=nverts || !(vlist[i].flags&V_DEFINED)) |
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BARYCCM bvecs; |
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/* compute barycentric coordinates */ |
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if (v1->flags & v2->flags & v3->flags & (V_HASINDX|V_HASNORM)) |
| 215 |
< |
if (comp_baryc(bvecs, v1->pos, v2->pos, v3->pos) < 0) |
| 215 |
> |
if (comp_baryc(&bvecs, v1->pos, v2->pos, v3->pos) < 0) |
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return; |
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/* put out texture (if any) */ |
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if (v1->flags & v2->flags & v3->flags & V_HASNORM) { |
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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", CALNAME); |
| 222 |
< |
printf("0\n21\n"); |
| 223 |
< |
put_baryc(bvecs); |
| 222 |
> |
printf("0\n16 "); |
| 223 |
> |
put_baryc(&bvecs); |
| 224 |
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printf("\t%14.12g %14.12g %14.12g\n", |
| 225 |
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v1->nor[0], v2->nor[0], v3->nor[0]); |
| 226 |
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printf("\t%14.12g %14.12g %14.12g\n", |
| 233 |
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printf("\n%s colorpict %s\n", mod, PATNAME); |
| 234 |
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mod = PATNAME; |
| 235 |
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printf("7 noneg noneg noneg %s %s u v\n", pn, CALNAME); |
| 236 |
< |
printf("0\n18\n"); |
| 237 |
< |
put_baryc(bvecs); |
| 236 |
> |
printf("0\n13 "); |
| 237 |
> |
put_baryc(&bvecs); |
| 238 |
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printf("\t%f %f %f\n", v1->ndx[0], v2->ndx[0], v3->ndx[0]); |
| 239 |
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printf("\t%f %f %f\n", v1->ndx[1], v2->ndx[1], v3->ndx[1]); |
| 240 |
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} |
| 249 |
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|
| 250 |
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int |
| 251 |
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comp_baryc(bcm, v1, v2, v3) /* compute barycentric vectors */ |
| 252 |
< |
register BARYCCM bcm; |
| 252 |
> |
register BARYCCM *bcm; |
| 253 |
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FLOAT *v1, *v2, *v3; |
| 254 |
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{ |
| 255 |
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FLOAT *vt; |
| 256 |
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FVECT va, vab, vcb; |
| 257 |
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double d; |
| 258 |
+ |
int ax0, ax1; |
| 259 |
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register int i, j; |
| 260 |
< |
|
| 261 |
< |
for (j = 0; j < 3; j++) { |
| 262 |
< |
for (i = 0; i < 3; i++) { |
| 263 |
< |
vab[i] = v1[i] - v2[i]; |
| 264 |
< |
vcb[i] = v3[i] - v2[i]; |
| 265 |
< |
} |
| 266 |
< |
d = DOT(vcb,vcb); |
| 260 |
> |
/* compute major axis */ |
| 261 |
> |
for (i = 0; i < 3; i++) { |
| 262 |
> |
vab[i] = v1[i] - v2[i]; |
| 263 |
> |
vcb[i] = v3[i] - v2[i]; |
| 264 |
> |
} |
| 265 |
> |
fcross(va, vab, vcb); |
| 266 |
> |
bcm->ax = ABS(va[0]) > ABS(va[1]) ? 0 : 1; |
| 267 |
> |
bcm->ax = ABS(va[bcm->ax]) > ABS(va[2]) ? bcm->ax : 2; |
| 268 |
> |
ax0 = (bcm->ax + 1) % 3; |
| 269 |
> |
ax1 = (bcm->ax + 2) % 3; |
| 270 |
> |
for (j = 0; j < 2; j++) { |
| 271 |
> |
vab[0] = v1[ax0] - v2[ax0]; |
| 272 |
> |
vcb[0] = v3[ax0] - v2[ax0]; |
| 273 |
> |
vab[1] = v1[ax1] - v2[ax1]; |
| 274 |
> |
vcb[1] = v3[ax1] - v2[ax1]; |
| 275 |
> |
d = vcb[0]*vcb[0] + vcb[1]*vcb[1]; |
| 276 |
|
if (d <= FTINY) |
| 277 |
|
return(-1); |
| 278 |
< |
d = DOT(vcb,vab)/d; |
| 279 |
< |
for (i = 0; i < 3; i++) |
| 280 |
< |
va[i] = vab[i] - vcb[i]*d; |
| 281 |
< |
d = DOT(va,va); |
| 278 |
> |
d = (vcb[0]*vab[0]+vcb[1]*vab[1])/d; |
| 279 |
> |
va[0] = vab[0] - vcb[0]*d; |
| 280 |
> |
va[1] = vab[1] - vcb[1]*d; |
| 281 |
> |
d = va[0]*va[0] + va[1]*va[1]; |
| 282 |
|
if (d <= FTINY) |
| 283 |
|
return(-1); |
| 284 |
< |
for (i = 0; i < 3; i++) { |
| 285 |
< |
va[i] /= d; |
| 286 |
< |
bcm[j][i] = va[i]; |
| 272 |
< |
} |
| 273 |
< |
bcm[j][3] = -DOT(v2,va); |
| 284 |
> |
bcm->tm[j][0] = va[0] /= d; |
| 285 |
> |
bcm->tm[j][1] = va[1] /= d; |
| 286 |
> |
bcm->tm[j][2] = -(v2[ax0]*va[0]+v2[ax1]*va[1]); |
| 287 |
|
/* rotate vertices */ |
| 288 |
|
vt = v1; |
| 289 |
|
v1 = v2; |
| 295 |
|
|
| 296 |
|
|
| 297 |
|
put_baryc(bcm) /* put barycentric coord. vectors */ |
| 298 |
< |
register BARYCCM bcm; |
| 298 |
> |
register BARYCCM *bcm; |
| 299 |
|
{ |
| 300 |
< |
register int i; |
| 301 |
< |
|
| 302 |
< |
for (i = 0; i < 3; i++) |
| 303 |
< |
printf("%14.8f %14.8f %14.8f %14.8f\n", |
| 304 |
< |
bcm[i][0], bcm[i][1], bcm[i][2], bcm[i][3]); |
| 300 |
> |
printf("\t%d\n", bcm->ax); |
| 301 |
> |
printf("%14.8f %14.8f %14.8f\n", |
| 302 |
> |
bcm->tm[0][0], bcm->tm[0][1], bcm->tm[0][2]); |
| 303 |
> |
printf("%14.8f %14.8f %14.8f\n", |
| 304 |
> |
bcm->tm[1][0], bcm->tm[1][1], bcm->tm[1][2]); |
| 305 |
|
} |
| 306 |
|
|
| 307 |
|
|
