* @param params2 set of weights for the other side
* @return the amount that params1 are better than params2. May be negative if params2 are better.
*/
@Override
public double compareFitness( ParameterArray params1, ParameterArray params2 ) {
GameWeights weights = controller_.getComputerWeights();
weights.setPlayer1Weights(params1);
weights.setPlayer2Weights(params2);
double run1 = runComputerVsComputer();
weights.setPlayer1Weights(params2);
weights.setPlayer2Weights(params1);
double run2 = runComputerVsComputer();
double delta = run1 - run2;
System.out.println("delta fitness = "+ run1 + " - " + run2 +" = " + delta );
return delta;