Editing LogZp1oZm1
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| Latest revision | Your text | ||
| Line 19: | Line 19: | ||
for minor speed gains. | for minor speed gains. | ||
Modified 2008 01 11 by Ph. Le Grand: | Modified 2008 01 11 by Ph. Le Grand: | ||
| − | Reduced some operations for minor speed gains | + | Reduced some operations for minor speed gains. |
| − | |||
-------------------------------------------------------------------------------*/ | -------------------------------------------------------------------------------*/ | ||
inline cmplex logZm1oZp1(const cmplex &Z) | inline cmplex logZm1oZp1(const cmplex &Z) | ||
| Line 27: | Line 26: | ||
double y(Z.imag()); | double y(Z.imag()); | ||
double r2=x*x+y*y; | double r2=x*x+y*y; | ||
| − | + | double den(r2+x+x+1.0); | |
| − | return cmplex(0.5*log(1.0-4.0*x/ | + | double add=0.0; |
| − | + | if ((r2)<1.0){ | |
| + | add=-PI; | ||
| + | if (y>=0.0){add=PI;} | ||
| + | } | ||
| + | return cmplex(0.5*log(1.0-4.0*x/den), | ||
| + | add+atan( (y+y) /(r2-1.0) )); | ||
} | } | ||
