From c0549d71b2109f10c1238db8b22362e7826ba61b Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Sun, 5 Jul 2026 15:59:23 +0200
Subject: Just rename from lib to modules

---
 lib/core/c++/write_vtk.hpp | 256 ---------------------------------------------
 1 file changed, 256 deletions(-)
 delete mode 100644 lib/core/c++/write_vtk.hpp

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

diff --git a/lib/core/c++/write_vtk.hpp b/lib/core/c++/write_vtk.hpp
deleted file mode 100644
index e852172..0000000
--- a/lib/core/c++/write_vtk.hpp
+++ /dev/null
@@ -1,256 +0,0 @@
-#pragma once
-
-#include <forstio/error.hpp>
-
-#include <forstio/codec/data.hpp>
-#include <forstio/codec/data_math.hpp>
-
-#include "descriptor.hpp"
-#include "flatten.hpp"
-#include "chunk.hpp"
-
-#include <fstream>
-#include <filesystem>
-
-namespace kel {
-namespace lbm {
-namespace impl {
-
-template<typename CellFieldSchema>
-struct lbm_vtk_writer {
-};
-
-template<typename T, uint64_t D>
-struct lbm_vtk_writer<sch::Primitive<T,D>> {
-	static saw::error_or<void> apply_header(std::ostream& vtk_file, std::string_view name){
-		vtk_file<<"SCALARS "<<name<<" float 1\n";
-		vtk_file<<"LOOKUP_TABLE default\n";
-		return saw::make_void();
-	}
-	static saw::error_or<void> apply(std::ostream& vtk_file, const saw::data<sch::Primitive<T,D>>& field){
-		if constexpr (std::is_same_v<T,sch::UnsignedInteger> and D == 1u) {
-			vtk_file<<field.template cast_to<sch::UInt16>().get()<<"\n";
-		}else{
-			vtk_file<<field.get()<<"\n";
-		}
-		return saw::make_void();
-	}
-};
-
-template<typename T, uint64_t D>
-struct lbm_vtk_writer<sch::FixedArray<T,D>> {
-	static saw::error_or<void> apply_header(std::ostream& vtk_file, std::string_view name){
-		vtk_file<<"VECTORS "<<name<<" float\n";
-		return saw::make_void();
-	}
-
-	static saw::error_or<void> apply(std::ostream& vtk_file, const saw::data<sch::FixedArray<T,D>>& field){
-		saw::data<sch::FixedArray<sch::UInt64,D>> index;
-		for(saw::data<sch::UInt64> it{0}; it.get() < D; ++it){
-			index.at({0u}).set(0u);
-		}
-
-		// vtk_file<<"VECTORS "<<name<<" float\n";
-		for(uint64_t i = 0u; i < D; ++i){
-			if(i > 0){
-				vtk_file<<" ";
-			}
-			vtk_file<<field.at({i}).get();
-		}
-		for(uint64_t i = D; i < 3; ++i){
-			vtk_file<<" 0";
-		}
-		vtk_file<<"\n";
-		return saw::make_void();
-	}
-};
-
-template<typename T, uint64_t Ghost, uint64_t... D>
-struct lbm_vtk_writer<sch::Chunk<T,Ghost,D...>> {
-
-	template<uint64_t d>
-	static saw::error_or<void> apply_d(std::ostream& vtk_file, const saw::data<sch::Chunk<T,Ghost,D...>>& field, saw::data<sch::FixedArray<sch::UInt64,sizeof...(D)>>& index){
-		// VTK wants to iterate over z,y,x instead of x,y,z
-		// We could reorder the dimensions, but eh
-		if constexpr ( d > 0u){
-			for(index.at({d-1u}) = 0u; index.at({d-1u}) < field.get_dims().at({d-1u}); ++index.at({d-1u})){
-				auto eov = apply_d<d-1u>(vtk_file, field, index);
-			}
-		}else{
-			auto eov = lbm_vtk_writer<T>::apply(vtk_file, field.at(index));
-			if(eov.is_error()) return eov;
-		}
-		return saw::make_void();
-	}
-
-	static saw::error_or<void> apply(std::ostream& vtk_file, const saw::data<sch::Chunk<T,Ghost,D...>>& field, std::string_view name){
-		{
-			auto eov = lbm_vtk_writer<T>::apply_header(vtk_file,name);
-			if(eov.is_error()){
-				return eov;
-			}
-		}
-		saw::data<sch::FixedArray<sch::UInt64,sizeof...(D)>> index;
-		for(saw::data<sch::UInt64> it{0}; it.get() < sizeof...(D); ++it){
-			index.at({0u}).set(0u);
-		}
-
-		{
-			auto eov = apply_d<sizeof...(D)>(vtk_file, field, index);
-			if(eov.is_error()){
-				return eov;
-			}
-		}
-
-		vtk_file<<"\n";
-
-		return saw::make_void();
-	}
-};
-
-template<typename T, uint64_t D>
-struct lbm_vtk_writer<sch::Vector<T,D>> {
-	static saw::error_or<void> apply_header(std::ostream& vtk_file, std::string_view name){
-		vtk_file<<"VECTORS "<<name<<" float\n";
-		return saw::make_void();
-	}
-	static saw::error_or<void> apply(std::ostream& vtk_file, const saw::data<sch::Vector<T,D>>& field){
-		static_assert(D > 0, "Non-dimensionality is bad for velocity.");
-		static_assert(D <= 3, "4th dimension as well. Mostly due to vtk.");
-
-		// vtk_file<<"VECTORS "<<name<<" float\n";
-		for(uint64_t i = 0u; i < D; ++i){
-			if(i > 0){
-				vtk_file<<" ";
-			}
-			vtk_file<<field.at({{i}}).get();
-		}
-		for(uint64_t i = D; i < 3; ++i){
-			vtk_file<<" 0";
-		}
-		vtk_file<<"\n";
-		return saw::make_void();
-	}
-};
-
-template<typename T>
-struct lbm_vtk_writer<sch::Scalar<T>> {
-	static saw::error_or<void> apply_header(std::ostream& vtk_file, std::string_view name){
-		vtk_file<<"SCALARS "<<name<<" float 1\n";
-		vtk_file<<"LOOKUP_TABLE default\n";
-		return saw::make_void();
-	}
-	static saw::error_or<void> apply(std::ostream& vtk_file, const saw::data<sch::Scalar<T>>& field){
-		// vtk_file<<"VECTORS "<<name<<" float\n";
-		vtk_file<<field.at({}).get();
-		vtk_file<<"\n";
-		return saw::make_void();
-	}
-};
-
-template<typename... MemberT, saw::string_literal... Keys, uint64_t... Ghost, uint64_t... Dims>
-struct lbm_vtk_writer<sch::Struct<sch::Member<sch::Chunk<MemberT,Ghost,Dims...>,Keys>...>> final  {
-	template<uint64_t i>
-	static saw::error_or<void> iterate_i(std::ostream& vtk_file,
-		const saw::data<sch::Struct<sch::Member<sch::Chunk<MemberT,Ghost,Dims...>,Keys>...>>& field){
-
-		if constexpr ( i < sizeof...(MemberT) ) {
-			using MT = typename saw::parameter_pack_type<i,sch::Member<sch::Chunk<MemberT,Ghost,Dims...>,Keys>...>::type;
-			{
-				auto eov = lbm_vtk_writer<typename MT::ValueType>::apply(vtk_file,field.template get<MT::KeyLiteral>(), MT::KeyLiteral.view());
-				if(eov.is_error()){
-					return eov;
-				}
-			}
-
-			return iterate_i<i+1u>(vtk_file, field);
-		}
-
-		return saw::make_void();
-	}
-
-
-	static saw::error_or<void> apply(std::ostream& vtk_file,
-		const saw::data<sch::Struct<sch::Member<sch::Chunk<MemberT,Ghost,Dims...>,Keys>...>>& field){
-		
-		vtk_file
-			<<"# vtk DataFile Version 3.0\n"
-			<<"LBM File\n"
-			<<"ASCII\n"
-			<<"DATASET STRUCTURED_POINTS\n"
-			<<"SPACING 1.0 1.0 1.0\n"
-			<<"ORIGIN 0.0 0.0 0.0\n"
-		;
-
-		auto& field_0 = field.template get<saw::parameter_key_pack_type<0u,Keys...>::literal>();	
-		auto meta = field_0.get_dims();
-		
-		saw::data<sch::UInt64> pd_size{1u};
-		// DIMENSIONS
-
-		{
-			vtk_file << "DIMENSIONS";
-			pd_size.set(saw::ct_multiply<uint64_t,Dims...>::value);
-			
-			static_assert(saw::ct_multiply<uint64_t,Dims...>::value > 0u, "Invalid Dim size resulting in length 0u");
-
-			for(saw::data<sch::UInt64> i{0u}; i.get() < sizeof...(Dims); ++i){
-				vtk_file << " " << meta.at(i).get(); 
-			}
-			for(saw::data<sch::UInt64> i{sizeof...(Dims)}; i.get() < 3u; ++i){
-				vtk_file << " 1";
-			}
-
-			vtk_file << "\n";
-		}
-		if constexpr (sizeof...(MemberT) > 0u){
-			// POINT DATA
-			{
-				vtk_file << "\nPOINT_DATA " << pd_size.get() <<"\n";
-			}
-
-			// HEADER TO BODY
-			{
-				vtk_file << "\n";
-			}
-		}
-		
-		return iterate_i<0u>(vtk_file, field);
-	}
-};
-
-}
-
-template<typename Sch>
-saw::error_or<void> write_vtk_file(const std::filesystem::path& out_dir, const std::string_view& file_name, uint64_t d_t, const saw::data<Sch>& field){
-
-	auto vtk_dir = out_dir / "vtk";
-	{
-		std::error_code ec;
-		std::filesystem::create_directories(vtk_dir,ec);
-		if(ec != std::errc{}){
-			return saw::make_error<saw::err::critical>("Could not create directory for write_vtk_file function");
-		}
-	}
-	std::string ft_name{file_name};
-
-	std::stringstream sstr;
-	sstr
-		<<file_name
-		<<"_"
-		<<d_t
-		<<".vtk"
-	;
-
-	std::ofstream vtk_file{vtk_dir / sstr.str() };
-
-	if( not vtk_file.is_open() ){
-		return saw::make_error<saw::err::critical>("Could not open file.");
-	}
-
-	auto eov = impl::lbm_vtk_writer<Sch>::apply(vtk_file, field);
-	return eov;
-}
-
-}
-}
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