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Add new superlinear interpolator

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Faster transition and between phases and
more persistent during mid and ending game.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2008-09-20 19:55:52 +01:00
parent 2dbc8feae3
commit cde7b30b65
1 changed files with 6 additions and 1 deletions
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7
src/evaluate.cpp
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@@ -1156,7 +1156,12 @@ namespace {
else else
ev = apply_scale_factor(ev, sf[BLACK]); ev = apply_scale_factor(ev, sf[BLACK]);
Value result = Value(int((mv * ph + ev * (128 - ph)) / 128)); // Superlinear interpolator
int sli_ph = int(ph);
sli_ph -= (64 - sli_ph) / 4;
sli_ph = Min(PHASE_MIDGAME, Max(PHASE_ENDGAME, sli_ph)); // ceiling
Value result = Value(int((mv * sli_ph + ev * (128 - sli_ph)) / 128));
return Value(int(result) & ~(GrainSize - 1)); return Value(int(result) & ~(GrainSize - 1));
} }