Evolve.java

package s6regen;

public abstract class Evolve {

    private final Reservoir reservoir;
    private long precision;
    private final float[] parent;
    private float parentCost;

//  Use fully perpared reservoir. Higher precision equals lower mutation rate.
    public Evolve(Reservoir r, long precision) {
        reservoir = r;
        this.precision = precision;
        parent = new float[r.getWeightSize()];
        parentCost = Float.POSITIVE_INFINITY;
    }

//  Next evolution evaluation.
    public void iterate() {
        reservoir.resetHeldStateAll();  // Clear all associative memory etc.
        reservoir.getWeights(parent);
        reservoir.mutate(precision);    // Reservoir now contains child weights
        float childCost = evaluateCost(reservoir);
        if (childCost < parentCost) {
            parentCost = childCost;
        } else {
            reservoir.setWeights(parent);
        }
    }

    public void setPrecision(long pre) {
        precision = pre;
    }

    public long getPrecision() {
        return precision;
    }

    public abstract float evaluateCost(Reservoir r);

}