#pragma once

#include <optional>

#include <QVector2D>

// Accumulates positions to produce their centroid (the center between them).
// Shared by the behavior executors that steer toward the middle of a group of
// entities (AdvanceExecutor: defence stations; StandbyExecutor: friendly ships).
struct Centroid
{
    QVector2D sum;
    int       count = 0;

    void add(const QVector2D& point)
    {
        sum += point;
        count += 1;
    }

    std::optional<QVector2D> value() const
    {
        if (count == 0) { return std::nullopt; }
        return sum / static_cast<float>(count);
    }
};