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44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
//Definition of input feature quantity K of NNUE evaluation function
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#include "enpassant.h"
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#include "index_list.h"
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namespace Eval {
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namespace NNUE {
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namespace Features {
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// Get a list of indices with a value of 1 among the features
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void EnPassant::AppendActiveIndices(
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const Position& pos, Color perspective, IndexList* active) {
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// do nothing if array size is small to avoid compiler warning
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if (RawFeatures::kMaxActiveDimensions < kMaxActiveDimensions) return;
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auto epSquare = pos.state()->epSquare;
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if (epSquare == SQ_NONE) {
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return;
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}
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if (perspective == BLACK) {
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epSquare = rotate180(epSquare);
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}
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auto file = file_of(epSquare);
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active->push_back(file);
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}
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// Get a list of indices whose values ??have changed from the previous one in the feature quantity
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void EnPassant::AppendChangedIndices(
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const Position& pos, Color perspective,
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IndexList* removed, IndexList* added) {
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// Not implemented.
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assert(false);
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}
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} // namespace Features
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} // namespace NNUE
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} // namespace Eval
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