protected override void Evaluate(SearchNode searchNode, GameState gameState)
{
if (gameState.IsGameOver)
{
if (gameState.PlayerToMoveNext == PlayerType.You)
{
searchNode.Evaluation = double.NegativeInfinity;
}
else
{
searchNode.Evaluation = double.PositiveInfinity;
}
}
else
{
MetricsWeightings weightings = gameState.OpponentIsInSameCompartment ? WeightingsInSameCompartment : WeightingsInSeparateCompartment;
double evaluation
= weightings.NumberOfCellsReachableByPlayerFactor
* (gameState.NumberOfCellsReachableByYou - gameState.NumberOfCellsReachableByOpponent)
+ weightings.TotalDegreesOfCellsReachableByPlayerFactor
* (gameState.TotalDegreesOfCellsReachableByYou - gameState.TotalDegreesOfCellsReachableByOpponent)
+ weightings.NumberOfCellsClosestToPlayerFactor
* (gameState.NumberOfCellsClosestToYou - gameState.NumberOfCellsClosestToOpponent)
+ weightings.TotalDegreesOfCellsClosestToPlayerFactor
* (gameState.TotalDegreesOfCellsClosestToYou - gameState.TotalDegreesOfCellsClosestToOpponent)
+ weightings.NumberOfComponentBranchesInTreeFactor
* (gameState.NumberOfComponentBranchesInYourTree - gameState.NumberOfComponentBranchesInOpponentsTree)
+ weightings.SumOfDistancesFromThisPlayerOnClosestCellsFactor
* (gameState.SumOfDistancesFromYouOnYourClosestCells - gameState.SumOfDistancesFromOpponentOnOpponentsClosestCells)
+ weightings.SumOfDistancesFromOtherPlayerOnClosestCellsFactor
* (gameState.SumOfDistancesFromOpponentOnYourClosestCells - gameState.SumOfDistancesFromYouOnOpponentsClosestCells)
+ weightings.ChamberValueFactor
* (gameState.ChamberValueForYou - gameState.ChamberValueForOpponent);
searchNode.Evaluation = evaluation;
}
}
protected BaseNegaMaxSolverWithMetricsWeightings(MetricsWeightings weightingsInSameCompartment, MetricsWeightings weightingsInSeparateCompartment)
{
WeightingsInSameCompartment = weightingsInSameCompartment;
WeightingsInSeparateCompartment = weightingsInSeparateCompartment;
}
