From 573bfdc0bbffdb1d68259bc348e36d57471d56be Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Tue, 24 Jun 2025 16:49:31 +0200
Subject: Broken cavity2d. why?

---
 c++/collision.hpp | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

(limited to 'c++/collision.hpp')

diff --git a/c++/collision.hpp b/c++/collision.hpp
index 7ca7c9f..128a499 100644
--- a/c++/collision.hpp
+++ b/c++/collision.hpp
@@ -40,18 +40,18 @@ public:
 	template<typename CellFieldSchema>
 	void apply(saw::data<CellFieldSchema>& field, saw::data<sch::FixedArray<sch::UInt64,Descriptor::D>> index, uint64_t time_step){
 		bool is_even = ((time_step % 2) == 0);
-		auto& cell = field.at(index);
+		auto& cell = field(index);
 
 		auto& dfs_old = is_even ? cell.template get<"dfs_old">() : cell.template get<"dfs">();
 		auto& dfs = (!is_even) ? cell.template get<"dfs_old">() : cell.template get<"dfs">();
 
-		typename saw::native_data_type<T>::type rho;
-		std::array<typename saw::native_data_type<T>::type, Descriptor::D> vel;
+		saw::data<T> rho;
+		saw::data<sch::FixedArray<T,Descriptor::D>> vel;
 		compute_rho_u<T,Descriptor>(dfs,rho,vel);
-		auto eq = equilibrium<Descriptor>(rho,vel);
+		auto eq = equilibrium<T,Descriptor>(rho,vel);
 
 		for(uint64_t i = 0u; i < Descriptor::Q; ++i){
-			dfs({i}).set(dfs({i}).get() + (1.0 / relaxation_) * (eq[i] - dfs({i}).get()));
+			dfs({i}).set(dfs({i}).get() + (1.0 / relaxation_) * (eq.at(i).get() - dfs({i}).get()));
 		}
 	}
 
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