21 lines
788 B
C++
21 lines
788 B
C++
#pragma once
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#include <algorithm>
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#include <optional>
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#include <vector>
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namespace aethera::render_2d::detail {
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/* 保留无评分接收者的绘制层级顺序，再将有评分的候选者按距离从近到远排列。 */
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struct Nearest_Event_Target_Rule {
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template <typename Target, typename Score>
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static void apply(std::vector<Target>& targets, Score&& score) {
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std::stable_sort(targets.begin(), targets.end(), [&](const Target& left, const Target& right) {
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const std::optional<double> left_score = score(left);
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const std::optional<double> right_score = score(right);
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if (!left_score) return right_score.has_value();
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if (!right_score) return false;
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return *left_score < *right_score;
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});
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}
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};
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}
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