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// SPDX-License-Identifier: LGPL-3.0-or-later
// Author: Kristian Lytje
#pragma once
#include <mini/Scan.h>
#include <limits>
namespace ausaxs::mini {
/**
* @brief A scan that may terminate early if a condition is met. The scan will start at the maximum x value and work its way to the minimum.
*
* The scan will terminate early (but never before half of the iterations have been performed) if one of the following conditions have been met:
* 1. The function value exceeds the limit. The limit can either be a multiplier of the minima or a fixed value.
* 2. The function value is on an uphill slope. This is determined by calculating the average of the last 7 function values.
* If the current value is greater than the average, the counter is incremented. If the counter reaches 3, the scan is terminated.
*/
class LimitedScan : public Scan {
public:
using Scan::Scan;
/**
* @brief Destructor.
*/
~LimitedScan() override;
/**
* @brief Set the maximum function value before terminating.
*/
void set_limit(double limit, bool minima_multiplier = false) noexcept;
/**
* @brief Generate a landscape of the function.
* The scan will start at the maximum x value and work its way to the minimum.
* This will terminate early if the function value exceeds the limit.
*/
mini::Landscape landscape(unsigned int evals) override;
private:
double limit = std::numeric_limits<double>::max();
bool limit_is_minima_multiplier = false;
};
}
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