| 178 |
|
{ |
| 179 |
|
/* free old image */ |
| 180 |
|
freepkids(&ptrunk); |
| 181 |
+ |
/* save reserve memory */ |
| 182 |
+ |
fillreserves(); |
| 183 |
|
/* compute resolution */ |
| 184 |
|
hresolu = dev->xsiz; |
| 185 |
|
vresolu = dev->ysiz; |
| 434 |
|
vp->vert = asin(vp->vert) / (PI/180./2.); |
| 435 |
|
return; |
| 436 |
|
} |
| 435 |
– |
} |
| 436 |
– |
|
| 437 |
– |
|
| 438 |
– |
spinvector(vres, vorig, vnorm, theta) /* rotate vector around normal */ |
| 439 |
– |
FVECT vres, vorig, vnorm; |
| 440 |
– |
double theta; |
| 441 |
– |
{ |
| 442 |
– |
extern double sin(), cos(); |
| 443 |
– |
double sint, cost, dotp; |
| 444 |
– |
FVECT vperp; |
| 445 |
– |
register int i; |
| 446 |
– |
|
| 447 |
– |
if (theta == 0.0) { |
| 448 |
– |
VCOPY(vres, vorig); |
| 449 |
– |
return; |
| 450 |
– |
} |
| 451 |
– |
sint = sin(theta); |
| 452 |
– |
cost = cos(theta); |
| 453 |
– |
dotp = DOT(vorig, vnorm); |
| 454 |
– |
fcross(vperp, vnorm, vorig); |
| 455 |
– |
for (i = 0; i < 3; i++) |
| 456 |
– |
vres[i] = vnorm[i]*dotp*(1.-cost) + |
| 457 |
– |
vorig[i]*cost + vperp[i]*sint; |
| 437 |
|
} |
