33 |
|
dc |= FXNEG<<i; |
34 |
|
} else |
35 |
|
cd[i] = (int)(dv[i] * DCSCALE); |
36 |
+ |
if (!(cd[0] | cd[1] | cd[2])) |
37 |
+ |
return(0); /* zero normal */ |
38 |
|
if (cd[0] <= cd[1]) { |
39 |
|
dc |= F1X | cd[0] << F1SFT; |
40 |
|
cm = cd[1]; |
46 |
|
dc |= F2Z | cd[2] << F2SFT; |
47 |
|
else |
48 |
|
dc |= cm << F2SFT; |
49 |
< |
if (!dc) /* don't generate 0 code */ |
49 |
> |
if (!dc) /* don't generate 0 code normally */ |
50 |
|
dc = F1X; |
51 |
|
return(dc); |
52 |
|
} |
59 |
|
{ |
60 |
|
double d1, d2, der; |
61 |
|
|
62 |
+ |
if (!dc) { /* special code for zero normal */ |
63 |
+ |
dv[0] = dv[1] = dv[2] = 0.; |
64 |
+ |
return; |
65 |
+ |
} |
66 |
|
d1 = ((dc>>F1SFT & FMASK)+.5)*(1./DCSCALE); |
67 |
|
d2 = ((dc>>F2SFT & FMASK)+.5)*(1./DCSCALE); |
68 |
|
der = sqrt(1. - d1*d1 - d2*d2); |