From 461022ee5135a3bfcca4659cf73fadccc0594d3f Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Wed, 10 Sep 2025 15:29:40 +0200
Subject: Moving towards gpu

---
 examples/cavity_2d_gpu/.nix/derivation.nix |  9 +++++++--
 examples/cavity_2d_gpu/SConscript          | 21 ++++++---------------
 examples/cavity_2d_gpu/cavity_2d_gpu.cpp   | 14 ++++----------
 3 files changed, 17 insertions(+), 27 deletions(-)

(limited to 'examples')

diff --git a/examples/cavity_2d_gpu/.nix/derivation.nix b/examples/cavity_2d_gpu/.nix/derivation.nix
index a98795b..876bcb7 100644
--- a/examples/cavity_2d_gpu/.nix/derivation.nix
+++ b/examples/cavity_2d_gpu/.nix/derivation.nix
@@ -3,12 +3,15 @@
 , scons
 , clang-tools
 , forstio
+, adaptive-cpp
 , pname
 , version
+, kel-lbm
 }:
 
 stdenv.mkDerivation {
-	inherit pname version;
+	pname = pname + "-examples-" + "cavity_2d_gpu";
+	inherit version;
   src = ./..;
 
   nativeBuildInputs = [
@@ -21,7 +24,9 @@ stdenv.mkDerivation {
     forstio.async
     forstio.codec
     forstio.codec-unit
-    forstio.codec-json
+		forstio.codec-json
+		adaptive-cpp
+		kel-lbm
   ];
 
   doCheck = true;
diff --git a/examples/cavity_2d_gpu/SConscript b/examples/cavity_2d_gpu/SConscript
index 077fb99..15b013d 100644
--- a/examples/cavity_2d_gpu/SConscript
+++ b/examples/cavity_2d_gpu/SConscript
@@ -10,7 +10,7 @@ Import('env')
 dir_path = Dir('.').abspath
 
 # Environment for base library
-cavity2d_env = examples_env.Clone();
+examples_env = env.Clone();
 
 examples_env.sources = sorted(glob.glob(dir_path + "/*.cpp"))
 examples_env.headers = sorted(glob.glob(dir_path + "/*.hpp"))
@@ -20,22 +20,13 @@ env.headers += examples_env.headers;
 
 # Cavity2D
 examples_objects = [];
-examples_env.add_source_files(examples_objects, ['cavity_2d.cpp'], shared=False);
-examples_env.cavity_2d = examples_env.Program('#bin/cavity_2d', [env.library_static, examples_objects]);
+examples_env.add_source_files(examples_objects, ['cavity_2d_gpu.cpp'], shared=False);
+examples_env.cavity_2d_gpu = examples_env.Program('#bin/cavity_2d_gpu', [examples_objects]);
 
 # Set Alias
 env.examples = [
-	examples_env.meta_2d,
-#	examples_env.cavity_2d,
-#	examples_env.cavity_3d,
-#	examples_env.particle_ibm_2d
-	examples_env.poiseulle_2d,
-	examples_env.poiseulle_channel_2d,
-	examples_env.poiseulle_particles_channel_2d
+	examples_env.cavity_2d_gpu
 ];
 env.Alias('examples', env.examples);
-
-if env["build_examples"]:
-	env.targets += ['examples'];
-	env.Install('$prefix/bin/', env.examples);
-#endif
+env.targets += ['examples'];
+env.Install('$prefix/bin/', env.examples);
diff --git a/examples/cavity_2d_gpu/cavity_2d_gpu.cpp b/examples/cavity_2d_gpu/cavity_2d_gpu.cpp
index a72cc6a..dc022a1 100644
--- a/examples/cavity_2d_gpu/cavity_2d_gpu.cpp
+++ b/examples/cavity_2d_gpu/cavity_2d_gpu.cpp
@@ -1,9 +1,4 @@
-#include "../c++/descriptor.hpp"
-#include "../c++/macroscopic.hpp"
-#include "../c++/lbm.hpp"
-#include "../c++/component.hpp"
-#include "../c++/collision.hpp"
-#include "../c++/boundary.hpp"
+#include <kel/lbm/lbm.hpp>
 
 #include <forstio/codec/data.hpp>
 // #include <forstio/remote/
@@ -27,14 +22,13 @@ using namespace saw::schema;
  * Q factor
  */
 using T = Float32;
-using D2Q5 = Descriptor<2u,5u>;
 using D2Q9 = Descriptor<2u,9u>;
 
 template<typename Desc>
 using DfCell = Cell<T, Desc, 0u, 0u, 1u>;
 
 template<typename Desc>
-using CellInfo = Cell<UInt8, D2Q9, 1u, 0u, 0u>;
+using CellInfo = Cell<UInt8, Desc, 1u, 0u, 0u>;
 
 /**
  * Basic type for simulation
@@ -217,11 +211,11 @@ void lbm_step(
 
 		switch(info({0u}).get()){
 			case 1u: {
-				coll.apply(latt, index, time_step);
+				bb.apply(latt, index, time_step);
 				break;
 			}
 			case 2u: {
-				bb.apply(latt, index, time_step);
+				coll.apply(latt, index, time_step);
 				break;
 			}
 			default:
-- 
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