Class AverageDouble

common/buildcraft/lib/misc/data/AverageDouble.java:14–76

import buildcraft.lib.misc.NBTUtils;

public class AverageDouble implements INBTSerializable<NBTTagCompound> {
    private double[] data;
    private int pos, precise;
    private double averageRaw, tickValue;

    public AverageDouble(int precise) {
        this.precise = precise;
        this.data = new double[precise];
        this.pos = 0;
    }

    public double getAverage() {
        return averageRaw / precise;
    }

    public void tick(double value) {
        internalTick(tickValue + value);
        tickValue = 0;
    }

    public void tick() {
        internalTick(tickValue);
        tickValue = 0;
    }

    private void internalTick(double value) {
        pos = ++pos % precise;
        double oldValue = data[pos];
        data[pos] = value;
        if (pos == 0) {
            averageRaw = 0;
            for (double iValue : data) {
                averageRaw += iValue;
            }
        } else {
            averageRaw = averageRaw - oldValue + value;
        }
    }

    public void push(double value) {
        tickValue += value;
    }

    @Override
    public NBTTagCompound serializeNBT() {
        NBTTagCompound nbt = new NBTTagCompound();
        nbt.setInteger("pos", pos);
        nbt.setInteger("precise", precise);
        nbt.setDouble("averageRaw", averageRaw);
        nbt.setDouble("tickValue", tickValue);
        nbt.setTag("data", NBTUtils.writeDoubleArray(data));
        return nbt;
    }

    @Override
    public void deserializeNBT(NBTTagCompound nbt) {
        precise = MathUtil.clamp(nbt.getInteger("precise"), 1, Short.MAX_VALUE);
        pos = MathUtil.clamp(nbt.getInteger("pos"), 0, precise);