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++/particle/geometry/circle.hpp | 85 +++++++++++++++++++++++++++
 modules/core/c++/particle/geometry/cube.hpp   | 22 +++++++
 2 files changed, 107 insertions(+)
 create mode 100644 modules/core/c++/particle/geometry/circle.hpp
 create mode 100644 modules/core/c++/particle/geometry/cube.hpp

(limited to 'modules/core/c++/particle/geometry')

diff --git a/modules/core/c++/particle/geometry/circle.hpp b/modules/core/c++/particle/geometry/circle.hpp
new file mode 100644
index 0000000..cf9b87e
--- /dev/null
+++ b/modules/core/c++/particle/geometry/circle.hpp
@@ -0,0 +1,85 @@
+#pragma once
+
+#include "../particle.hpp"
+
+namespace kel {
+namespace lbm {
+
+template<typename T, uint64_t D>
+class particle_circle_geometry {
+private:
+public:
+	particle_circle_geometry()
+	{}
+
+	template<typename MT = T>
+	saw::data<sch::ParticleMask<MT,D>> generate_mask(uint64_t resolution, uint64_t boundary_nodes = 0) const {
+		saw::data<sch::ParticleMask<MT,D>> mask;
+
+		auto& grid = mask.template get<"grid">();
+		auto& com = mask.template get<"center_of_mass">();
+		com = {};
+
+		//uint64_t rad_i = static_cast<uint64_t>(resolution * radius_.get())+1u;
+		uint64_t diameter_i = resolution;
+		uint64_t size = diameter_i + 2*boundary_nodes;
+		grid = {{{size,size}}};
+
+		saw::data<T> delta_x{static_cast<typename saw::native_data_type<T>::type>(2.0  / static_cast<double>(diameter_i))};
+		saw::data<T> center = (saw::data<T>{1.0} + saw::data<T>{2.0} * saw::data<T>{static_cast<saw::native_data_type<T>::type>(boundary_nodes)/diameter_i});
+
+		saw::data<sch::FixedArray<sch::UInt64,D>> boundary_arr;
+		for(uint64_t i = 0u; i < D; ++i){
+			boundary_arr.set(boundary_nodes);
+		}
+
+		iterator<D>::apply([&](const auto& index){
+			grid.at(index).set(0);
+		}, {}, grid.dims());
+		
+		iterator<D>::apply([&](const auto& index){
+			saw::data<sch::Vector<T,D>> f_ind;
+			for(uint64_t i = 0u; i < D; ++i){
+				f_ind.at({{i}}) = (index.at({{i}}) + 0.5) * delta_x - center;
+			}
+
+			auto norm_f_ind = saw::math::norm(f_ind);
+		}, {}, grid.dims(),boundary_arr);
+
+		for(uint64_t i = 0; i < size; ++i){
+			for(uint64_t j = 0; j < size; ++j){
+				grid.at({{i,j}}).set(0);
+				if(i >= boundary_nodes and j >= boundary_nodes and i < (diameter_i + boundary_nodes) and j < (diameter_i + boundary_nodes) ){
+					saw::data<T> fi = saw::data<T>{static_cast<saw::native_data_type<T>::type>(0.5+i)} * delta_x - center;
+					saw::data<T> fj = saw::data<T>{static_cast<saw::native_data_type<T>::type>(0.5+j)} * delta_x - center;
+
+					auto norm_f_ij = fi*fi + fj*fj;
+					if(norm_f_ij.get() <= 1){
+						grid.at({{i,j}}).set(1);
+					}
+				}
+			}
+		}
+
+		// I don't fully remember what this did
+		saw::data<T> total_mass{};
+		iterator::apply<D>::apply([&](const saw::data<sch::FixedArray<sch::UInt64,D>>& index){
+			auto ind_vec = saw::math::vectorize_data(index).template cast_to<T>();
+			for(uint64_t i{0u}; i < D; ++i){
+				ind_vec.at({{i}}) = ind_vec.at({{i}}) * grid.at(index);
+			}
+			com = com + ind_vec;
+
+			total_mass = total_mass + grid.at(index);
+		},{}, grid.dims());
+
+		for(uint64_t i{0u}; i < D; ++i){
+			com.at({{i}}) = com.at({{i}}) / total_mass;
+		}
+
+		return mask;
+	}
+};
+
+}
+}
diff --git a/modules/core/c++/particle/geometry/cube.hpp b/modules/core/c++/particle/geometry/cube.hpp
new file mode 100644
index 0000000..6392de8
--- /dev/null
+++ b/modules/core/c++/particle/geometry/cube.hpp
@@ -0,0 +1,22 @@
+#pragma once
+
+#include "../particle.hpp"
+
+namespace kel {
+namespace lbm {
+template<typename T, uint64_t D>
+class particle_cubic_geometry {
+private:
+public:
+	template<typename MT = T>
+	saw::data<sch::ParticleMask<MT,D>> generate_mask(uint64_t resolution, uint64_t bound_nodes = 0u){
+
+		saw::data<sch::ParticleMask<MT,D>> mask;
+
+		auto& grid = mask.template get<"grid">();
+		auto& com = mask.template get<"center_of_mass">();
+
+
+	}
+}
+}
-- 
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