From c0549d71b2109f10c1238db8b22362e7826ba61b Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Sun, 5 Jul 2026 15:59:23 +0200
Subject: Just rename from lib to modules

---
 modules/core/c++/stream.hpp | 61 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 modules/core/c++/stream.hpp

(limited to 'modules/core/c++/stream.hpp')

diff --git a/modules/core/c++/stream.hpp b/modules/core/c++/stream.hpp
new file mode 100644
index 0000000..dc7cfb3
--- /dev/null
+++ b/modules/core/c++/stream.hpp
@@ -0,0 +1,61 @@
+#pragma once
+
+#include "component.hpp"
+
+namespace kel {
+namespace lbm {
+namespace cmpt {
+struct Stream {};
+}
+
+template<typename T, typename Descriptor, typename Encode>
+class component<T,Descriptor, cmpt::Stream, Encode> final {
+private:
+public:
+	static constexpr saw::string_literal name = "streaming";
+	static constexpr saw::string_literal after = "collide";
+	static constexpr saw::string_literal before = "";
+
+	template<typename CellFieldSchema>
+	void apply(const saw::data<CellFieldSchema, Encode>& field, saw::data<sch::FixedArray<sch::UInt64,Descriptor::D>> index, saw::data<sch::UInt64> time_step) const {
+		using dfi = df_info<T,Descriptor>;
+		auto g_index = index;
+
+		for(uint64_t i = 0u; i < Descriptor::D; ++i){
+			++g_index.at({{i}});
+		}
+
+		bool is_even = ((time_step.get() % 2) == 0);
+
+		auto& dfs_old_f = (is_even) ? field.template get<"dfs_old">() : field.template get<"dfs">();
+		auto& dfs_new_f = (is_even) ? field.template get<"dfs">() : field.template get<"dfs_old">();
+		auto info_f = field.template get<"info">();
+
+		auto info_meta = info_f.get_dims();
+
+		/*
+		bool border = false;
+		for(uint64_t i = 0u; i < Descriptor::D; ++i){
+			auto ind_i = index.at({i});
+			border |= (ind_i.get()) == 0u or (ind_i == info_meta.at({i}));
+		}
+
+		if (not border){
+		}
+		*/
+
+		auto& dfs_new = dfs_new_f.ghost_at(g_index);
+
+		for(uint64_t i = 0u; i < Descriptor::Q; ++i){
+			auto dir = dfi::directions[dfi::opposite_index[i]];
+			auto g_index_nb = g_index;
+			for(uint64_t z = 0u; z < Descriptor::D; ++z){
+				g_index_nb.at({z}).set(g_index.at({z}).get() + dir[z]);
+			}
+
+			dfs_new.at({i}) = dfs_old_f.ghost_at(g_index_nb).at({i});
+		}
+	}
+};
+}
+}
-- 
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