From 1dc57770fe88b0564463d67a77a4c35f403c5d7f Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Wed, 23 Apr 2025 20:19:36 +0200
Subject: Working on mask generation of static solid particles

---
 examples/cavity_2d.cpp    | 28 -----------------
 examples/poiseulle_2d.cpp | 76 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 76 insertions(+), 28 deletions(-)

(limited to 'examples')

diff --git a/examples/cavity_2d.cpp b/examples/cavity_2d.cpp
index 4df4f2b..d40e06e 100644
--- a/examples/cavity_2d.cpp
+++ b/examples/cavity_2d.cpp
@@ -48,34 +48,6 @@ using CellStruct = Struct<
 using CavityFieldD2Q9 = CellField<D2Q9, CellStruct<D2Q9>>;
 }
 
-/**
- * Unsure if feasible. I would have a rho normalization on the dfs and then I would use the const rho_computation
- */
-template<typename Desc>
-void compute_const_rho_u (
-		saw::data<sch::DfCell<Desc>>& dfs,
-		const typename saw::native_data_type<sch::T>::type rho,
-		std::array<typename saw::native_data_type<sch::T>::type, 2>& vel
-	)
-{
-	using dfi = df_info<sch::T, Desc>;
-
-	saw::native_data_type<sch::T>::type real_rho = 0;
-	std::fill(vel.begin(), vel.end(), 0);
-
-	for(size_t i = 0; i < Desc::Q; ++i){
-		real_rho += dfs(i).get();
-		vel[0] += dfi::directions[i][0] * dfs(i).get();
-		vel[1] += dfi::directions[i][1] * dfs(i).get();
-	}
-	for(size_t i = 0; i < Desc::Q; ++i){
-		dfs(i).set(dfs(i).get() * (rho/real_rho));
-	}
-
-	vel[0] *= real_rho / (rho*rho);
-	vel[1] *= real_rho / (rho*rho);
-}
-
 /**
  * Calculates the equilibrium for each direction
  */
diff --git a/examples/poiseulle_2d.cpp b/examples/poiseulle_2d.cpp
index be3efbc..4ecf500 100644
--- a/examples/poiseulle_2d.cpp
+++ b/examples/poiseulle_2d.cpp
@@ -2,7 +2,83 @@
 
 #include <forstio/codec/data.hpp>
 
+namespace kel {
+namespace lbm {
+namespace sch {
+using namespace saw::schema;
+
+/**
+ * Basic distribution function
+ * Base type
+ * D
+ * Q
+ * Scalar factor
+ * D factor
+ * Q factor
+ */
+using T = Float32;
+using D2Q5 = Descriptor<2,5>;
+using D2Q9 = Descriptor<2,9>;
+
+template<typename Desc>
+using DfCell = Cell<T, Desc, 0, 0, 1>;
+
+template<typename Desc>
+using CellInfo = Cell<UInt8, D2Q9, 1, 0, 0>;
+
+/**
+ * Basic type for simulation
+ */
+template<typename Desc>
+using CellStruct = Struct<
+	Member<DfCell<Desc>, "dfs">,
+	Member<DfCell<Desc>, "dfs_old">,
+	Member<CellInfo<Desc>, "info">
+>;
+
+
+using CavityFieldD2Q9 = CellField<D2Q9, CellStruct<D2Q9>>;
+}
+}
+}
+
 int main(int argc, char** argv){
+	using namespace kel::lbm;
+
+	std::string_view cfg_file_name = "config.json";
+	if(argc > 1){
+		cfg_file_name = argv[1];
+	}
+
+	auto eo_conf = load_lbm_config<sch::Float64,sch::Descriptor<2,9>>(cfg_file_name);
+	if(eo_conf.is_error()){
+		auto& err = eo_conf.get_error();
+		std::cerr<<"[Error]: "<<err.get_category();
+		auto err_msg = err.get_message();
+		if(!err_msg.empty()){
+			std::cerr<<" - "<<err_msg;
+		}
+		std::cerr<<std::endl;
+
+		return err.get_id();
+	}
+
+	auto& conf = eo_conf.get_value();
+
+	converter<sch::Float64> conv{
+		{conf.template get<"delta_x">()},
+		{conf.template get<"delta_t">()}
+	};
+
+	print_lbm_meta<sch::Float64,sch::Descriptor<2,9>>(conv, {conf.template get<"kinematic_viscosity">()});
+
+
+	saw::data<sch::FixedArray<sch::UInt64,sch::D2Q9::D>> dim{{128, 128}};
+
+	saw::data<sch::CavityFieldD2Q9, saw::encode::Native> lattice{dim};
+
+
+
 
 	return 0;
 }
-- 
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