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59 lines
1.3 KiB
59 lines
1.3 KiB
2 years ago
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#include <type_traits>
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#include <function_ref.hpp>
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#include "engine/displacement.hpp"
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namespace devilution {
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/**
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* CrawlTable specifies X- and Y-coordinate deltas from a missile target coordinate.
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*
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* n=4
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*
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* y
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* ^
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* | 1
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* | 3#4
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* | 2
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* +-----> x
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*
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* n=16
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*
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* y
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* ^
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* | 314
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* | B7 8C
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* | F # G
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* | D9 AE
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* | 526
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* +-------> x
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*/
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bool DoCrawl(unsigned radius, tl::function_ref<bool(Displacement)> function);
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bool DoCrawl(unsigned minRadius, unsigned maxRadius, tl::function_ref<bool(Displacement)> function);
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template <typename F>
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auto Crawl(unsigned radius, F function) -> std::invoke_result_t<decltype(function), Displacement>
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{
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std::invoke_result_t<decltype(function), Displacement> result;
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DoCrawl(radius, [&result, &function](Displacement displacement) -> bool {
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result = function(displacement);
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return !result;
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});
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return result;
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}
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template <typename F>
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auto Crawl(unsigned minRadius, unsigned maxRadius, F function) -> std::invoke_result_t<decltype(function), Displacement>
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{
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std::invoke_result_t<decltype(function), Displacement> result;
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DoCrawl(minRadius, maxRadius, [&result, &function](Displacement displacement) -> bool {
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result = function(displacement);
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return !result;
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});
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return result;
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}
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} // namespace devilution
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