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factorial optimization suggested by pponywong.

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This commit is contained in:
castano
2008-05-06 06:37:06 +00:00
parent 52b3bc9437
commit 6a6b3edce1
1 changed files with 4 additions and 2 deletions
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6
src/nvmath/SphericalHarmonic.cpp
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@ -11,8 +11,10 @@ namespace
// Basic integer factorial. // Basic integer factorial.
inline static int factorial( int v ) inline static int factorial( int v )
{ {
if (v == 0) { const static int fac_table[] = { 1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800, 39916800 };
return 1;
if(v <= 11){
return fac_table[v];
} }
int result = v; int result = v;