From 8bc7955f5d95521f7c932b9551a3b71a62117630 Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Thu, 16 Jul 2026 21:49:56 +0200
Subject: Fixed stupid issue regarding device code

---
 .../moving_poiseulle_particles_2d_hlbm_gpu/sim.cpp    | 19 +++++++------------
 modules/core/c++/hlbm.hpp                             | 14 +++++++-------
 modules/core/c++/particle/aabb.hpp                    | 10 +++++-----
 3 files changed, 19 insertions(+), 24 deletions(-)

diff --git a/examples/moving_poiseulle_particles_2d_hlbm_gpu/sim.cpp b/examples/moving_poiseulle_particles_2d_hlbm_gpu/sim.cpp
index 749c951..a4cae03 100644
--- a/examples/moving_poiseulle_particles_2d_hlbm_gpu/sim.cpp
+++ b/examples/moving_poiseulle_particles_2d_hlbm_gpu/sim.cpp
@@ -13,7 +13,7 @@ namespace lbm {
 constexpr uint64_t dim_y = 256ul;
 constexpr uint64_t dim_x = dim_y * 20ul;
 
-// constexpr uint64_t particle_amount = 1ul;
+constexpr uint64_t particle_amount = 1ul;
 
 namespace sch {
 using namespace saw::schema;
@@ -149,14 +149,13 @@ saw::error_or<void> setup_initial_conditions(
 	rad.at({}) = 2.0f;
 	saw::data<sch::Scalar<T>> dense;
 	dense.at({}) = 1.0f;
-	particles = create_spheroid_particle_group<T,Desc::D,1u>(rad,dense,{16u});
+	particles = create_spheroid_particle_group<T,Desc::D,particle_amount>(rad,dense,{16u});
 	{
 		auto& rb = particles.template get<"particles">().at({0u}).template get<"rigid_body">();
 		auto& rbp = rb.template get<"position">();
-		rbp.at({0u}) = 0.25 * dim_x;
-		rbp.at({1u}) = 0.5 * dim_y;
+		rbp.at({{0u}}) = 0.25 * dim_x;
+		rbp.at({{1u}}) = 0.5 * dim_y;
 		auto& rbp_old = rbp;
-
 	}
 
 	return saw::make_void();
@@ -175,24 +174,22 @@ saw::error_or<void> step(
 	auto& porous_f = macros.template get<"porosity">();
 
 	q.submit([&](acpp::sycl::handler& h){
-		component<T,Desc,cmpt::HlbmParticle,encode::Sycl<saw::encode::Native>> hlbm_one_part;
+		component<T,Desc,cmpt::HlbmOneParticle,encode::Sycl<saw::encode::Native>> hlbm_one_part;
 
-		h.parallel_for(acpp::sycl::range<1u>{1u}, [=](acpp::sycl::id<1u> idx){
+		h.parallel_for(acpp::sycl::range<1u>{particle_amount}, [=](acpp::sycl::id<1u> idx){
 			saw::data<sch::FixedArray<sch::UInt64,1u>> index;
 			for(uint64_t i = 0u; i < 1u; ++i){
 				index.at({{i}}).set(idx[i]);
 			}
 
 			hlbm_one_part.apply(fields,macros,particles,index,t_i);
-
 		});
 	}).wait();
 
 	// auto coll_ev = 
 	q.submit([&](acpp::sycl::handler& h){
-		component<T,Desc,cmpt::Hlbm,encode::Sycl<saw::encode::Native>> collision{0.65};
+		component<T,Desc,cmpt::Hlbm,encode::Sycl<saw::encode::Native>> collision{0.8};
 		component<T,Desc,cmpt::BounceBack,encode::Sycl<saw::encode::Native>> bb;
-		component<T,Desc,cmpt::AntiBounceBack<0u>,encode::Sycl<saw::encode::Native>> abb;
 
 		component<T,Desc,cmpt::ZouHeHorizontal<true>,encode::Sycl<saw::encode::Native>> flow_in{
 			[&](){
@@ -225,12 +222,10 @@ saw::error_or<void> step(
 					break;
 				case 3u:
 					flow_in.apply(fields,index,t_i);
-					// equi.apply(fields,index,t_i);
 					collision.apply(fields,macros,index,t_i);
 					break;
 				case 4u:
 					flow_out.apply(fields,index,t_i);
-					// equi.apply(fields,index,t_i);
 					collision.apply(fields,macros,index,t_i);
 				break;
 				default:
diff --git a/modules/core/c++/hlbm.hpp b/modules/core/c++/hlbm.hpp
index 1c625bb..cc35f9b 100644
--- a/modules/core/c++/hlbm.hpp
+++ b/modules/core/c++/hlbm.hpp
@@ -13,6 +13,7 @@ namespace lbm {
 namespace cmpt {
 struct HlbmInit {}; 
 struct Hlbm {};
+struct HlbmOneParticle {};
 struct HlbmParticle {};
 struct HlbmOneParticleMomentumExchange {};
 }
@@ -101,7 +102,7 @@ public:
 };
 
 template<typename T, typename Desc, typename Encode>
-class component<T, Desc, cmpt::HlbmParticle, Encode> final {
+class component<T, Desc, cmpt::HlbmOneParticle, Encode> final {
 private:
 /*
 	template<typename CellFieldSchema, typename MacroFieldSchema, typename ParticleSchema, uint64_t i>
@@ -124,6 +125,7 @@ public:
 			auto& parts = part_spheroid_group.template get<"particles">();
 			auto parts_size = parts.meta().at({0u});
 
+
 			auto& pi = parts.at(index);
 			auto& pirb = pi.template get<"rigid_body">();
 			auto& pirb_pos = pirb.template get<"position">();
@@ -131,10 +133,8 @@ public:
 			saw::data<sch::FixedArray<sch::UInt64,Desc::D>> start;
 			saw::data<sch::FixedArray<sch::UInt64,Desc::D>> stop;
 
-			auto eo_aabb = particle_aabb<typename ParticleSchema::ValueType>::calculate(part_spheroid_group,index,mvel.meta());
+			auto eo_aabb = particle_aabb<typename ParticleSchema::ValueType>::calculate(part_spheroid_group,{{0u}},mvel.meta());
 			if(eo_aabb.is_error()){
-				std::cerr<<"Prepping error"<<std::endl;
-				std::cerr<<eo_aabb.get_error().get_category()<<std::endl;
 				return;
 			}
 			auto& aabb = eo_aabb.get_value();
@@ -146,13 +146,13 @@ public:
 			iterator<Desc::D>::apply([&](const auto& index){
 				// ask for the d_k value here.
 				// For every value im iterating over I need sth
-					std::cout<<"Pos: "<<index.at({0u}).get()<<" "<<index.at({1u}).get()<<std::endl;
+				// std::cout<<"Pos: "<<index.at({0u}).get()<<" "<<index.at({1u}).get()<<std::endl;
+				
+
 			},start,stop);
 
 			// Check
 		}
-		
-
 	}
 };
 
diff --git a/modules/core/c++/particle/aabb.hpp b/modules/core/c++/particle/aabb.hpp
index 983fd97..da39ec2 100644
--- a/modules/core/c++/particle/aabb.hpp
+++ b/modules/core/c++/particle/aabb.hpp
@@ -23,23 +23,24 @@ public:
 	>;
 public:
 	template<typename Sch, typename Encode>
-	static constexpr saw::error_or<saw::data<AABB>> calculate(const saw::data<Sch,Encode>& p_grp, const saw::data<sch::FixedArray<sch::UInt64,1u>>& i, const saw::data<sch::FixedArray<sch::UInt64,D>>& meta){
+	static constexpr saw::error_or<saw::data<AABB>> calculate(const saw::data<Sch,Encode>& p_grp, const saw::data<sch::FixedArray<sch::UInt64,1u>>& index, const saw::data<sch::FixedArray<sch::UInt64,D>>& meta){
 		static_assert(PC > 0u, "Can't calculate from no particles");
-		if(not (i.at({0u}).get() < PC) ){
+		if(not (index.at({{0u}}).get() < PC) ){
+			std::cerr.flush();
 			return saw::make_error<saw::err::critical>("Too large i in particle_aabb");
 		}
 
 		saw::data<AABB> aabb;
 		auto& parts = p_grp.template get<"particles">();
 
-		auto& pi = parts.at(i);
+		auto& pi = parts.at(index);
 		auto& pirb = pi.template get<"rigid_body">();
 		auto& pirb_pos = pirb.template get<"position">();
 
 		auto& a = aabb.template get<"a">();
 		auto& b = aabb.template get<"b">();
 
-		const saw::data<sch::Scalar<T>>& rad_d = p_grp.template get<"collision">().at(i).template get<"radius">();
+		const saw::data<sch::Scalar<T>>& rad_d = p_grp.template get<"collision">().at({{0u}}).template get<"radius">();
 
 		saw::data<sch::Vector<T,D>> lower;
 		saw::data<sch::Vector<T,D>> upper;
@@ -52,7 +53,6 @@ public:
 		}
 		
 		return aabb;
-
 	}
 };
 
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