From ba9c23e4177ab9309f69155601578b118b2fd782 Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Wed, 4 Feb 2026 16:28:48 +0100
Subject: Weird missing vtk writes

---
 lib/core/c++/macroscopic.hpp | 93 +++-----------------------------------------
 1 file changed, 6 insertions(+), 87 deletions(-)

(limited to 'lib/core/c++/macroscopic.hpp')

diff --git a/lib/core/c++/macroscopic.hpp b/lib/core/c++/macroscopic.hpp
index 1532873..19ab3e9 100644
--- a/lib/core/c++/macroscopic.hpp
+++ b/lib/core/c++/macroscopic.hpp
@@ -4,113 +4,32 @@
 
 namespace kel {
 namespace lbm {
-template<typename T, typename Desc>
-void compute_rho_u (
-		const saw::data<sch::FixedArray<T,Desc::Q>>& dfs,
-		saw::data<T>& rho,
-		saw::data<sch::FixedArray<T,Desc::D>>& vel
-	)
-{
-	using dfi = df_info<T, Desc>;
-
-	rho = 0;
-	for(size_t j = 0; j < Desc::D; ++j){
-		vel.at({{j}}).set(0);
-	}
-
-	for(size_t j = 0; j < Desc::Q; ++j){
-		rho = rho + dfs.at({j});
-		for(size_t i = 0; i < Desc::D; ++i){
-			vel.at({{i}}) = vel.at({{i}}) + dfi::directions[j][i] * dfs.at({j}).get();
-		}
-	}
-
-	for(size_t i = 0; i < Desc::D; ++i){
-		vel.at({i}) = vel.at({i}) / rho;
-	}
-}
-/**
- * Calculate the macroscopic variables rho and u in Lattice Units.
- */
-template<typename T, typename Desc>
-void compute_rho_u (
-		const saw::data<sch::Cell<T, Desc, 0, 0, 1>>& dfs,
-		typename saw::native_data_type<T>::type& rho,
-		std::array<typename saw::native_data_type<T>::type, 2>& vel
-	)
-{
-	using dfi = df_info<T, Desc>;
-
-	rho = 0;
-	std::fill(vel.begin(), vel.end(), 0);
-
-	for(size_t j = 0; j < Desc::Q; ++j){
-		rho += dfs(j).get();
-		for(size_t i = 0; i < Desc::D; ++i){
-			vel[i] += dfi::directions[j][i] * dfs(j).get();
-		}
-	}
-
-	for(size_t i = 0; i < Desc::D; ++i){
-		vel[i] /= rho;
-	}
-}
-
 /**
  * Calculate the macroscopic variables rho and u in Lattice Units.
  */
 template<typename T, typename Desc>
 void compute_rho_u (
-		const saw::data<sch::Cell<T, Desc, 0, 0, 1>>& dfs,
-		saw::ref<saw::data<T>> rho,
-		saw::ref<saw::data<sch::FixedArray<T,Desc::D>>> vel
-	)
-{
-	using dfi = df_info<T, Desc>;
-
-	rho().set(0);
-	for(uint64_t i = 0; i < Desc::D; ++i){
-		vel().at({i}).set(0);
-	}
-
-	for(size_t j = 0; j < Desc::Q; ++j){
-		rho() = rho() + dfs(j);
-		for(size_t i = 0; i < Desc::D; ++i){
-			vel().at({i}) = vel().at({i}) + saw::data<T>{static_cast<typename saw::native_data_type<T>::type>(dfi::directions[j][i])} * dfs(j);
-		}
-	}
-
-	for(size_t i = 0; i < Desc::D; ++i){
-		vel().at({i}) = vel().at({i}) / rho();
-	}
-}
-
-/**
- * Calculate the macroscopic variables rho and u in Lattice Units.
- */
-template<typename T, typename Desc>
-void compute_rho_u (
-		const saw::data<sch::Cell<T, Desc, 0, 0, 1>>& dfs,
-		saw::ref<saw::data<T>> rho,
+		const saw::data<sch::FixedArray<T,Desc::Q>>& dfs,
+		saw::ref<saw::data<sch::Scalar<T>>> rho,
 		saw::ref<saw::data<sch::Vector<T,Desc::D>>> vel
 	)
 {
 	using dfi = df_info<T, Desc>;
 
-	rho().set(0);
+	rho().at({}).set(0);
 	for(uint64_t i = 0; i < Desc::D; ++i){
 		vel().at({{i}}).set(0);
 	}
 
 	for(size_t j = 0; j < Desc::Q; ++j){
-		rho() = rho() + dfs(j);
+		rho().at({}) = rho().at({}) + dfs.at({j});
 		for(size_t i = 0; i < Desc::D; ++i){
-			vel().at({{i}}) = vel().at({{i}}) + saw::data<T>{static_cast<typename saw::native_data_type<T>::type>(dfi::directions[j][i])} * dfs(j);
+			vel().at({{i}}) = vel().at({{i}}) + saw::data<T>{static_cast<typename saw::native_data_type<T>::type>(dfi::directions[j][i])} * dfs.at({j});
 		}
 	}
 
 	for(size_t i = 0; i < Desc::D; ++i){
-		vel().at({{i}}) = vel().at({{i}}) / rho();
+		vel().at({{i}}) = vel().at({{i}}) / rho().at({});
 	}
 }
 }
-- 
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