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#pragma once
#include <forstio/error.hpp>
#include <forstio/codec/data.hpp>
#include "descriptor.hpp"
#include <fstream>
namespace kel {
namespace lbm {
namespace impl {
template<typename CellFieldSchema>
struct lbm_vtk_writer {
};
template<typename... MemberTypes, saw::string_literal... MemberNames>
struct lbm_vtk_writer<sch::Struct<sch::Member<MemberTypes,MemberNames>...>> {
saw::error_or<void> apply(){
return saw::make_void();
}
};
template<typename T, uint64_t D>
struct lbm_vtk_writer<sch::FixedArray<T,D>> {
static saw::error_or<void> apply(std::ofstream& vtk_file, std::string_view name){
vtk_file<<"VECTORS "<<name<<" float\n";
}
};
template<typename Desc, typename... StructT, saw::string_literal... StructN>
struct lbm_vtk_writer<sch::CellField<Desc,sch::Struct<sch::Member<StructT,StructN>...>>> {
template<uint64_t i, uint64_t Dep>
saw::error_or<void> write_i_iterate_d(std::ofstream& vtk_file, const saw::data<sch::CellField<Desc,sch::Struct<sch::Member<StructT,StructN>...>>>& field, saw::data<sch::FixedArray<sch::UInt64,Desc::D>>& index){
if constexpr (Dep == Desc::D){
}
}
template<uint64_t i>
saw::error_or<void> write_i(std::ofstream& vtk_file, const saw::data<sch::CellField<Desc,sch::Struct<sch::Member<StructT,StructN>...>>>& field){
auto meta = field.meta();
saw::data<sch::FixedArray<sch::UInt64,Desc::D>> index;
for(saw::data<sch::UInt64> it{0}; it.get() < Desc::D; ++it){
index.at({0u}).set(0u);
}
// vtk_file write?
// Data header
{
auto eov = lbm_vtk_writer<typename saw::parameter_pack_type<i,StructT...>::type>::apply(vtk_file, saw::parameter_key_pack_type<i, StructN...>::literal.view());
}
return write_i_iterate_d<i,0u>(vtk_file, field, index);
return saw::make_void();
}
template<uint64_t i>
saw::error_or<void> iterate_i(std::ofstream& vtk_file, const saw::data<sch::CellField<Desc,sch::Struct<sch::Member<StructT,StructN>...>>>& field){
{
auto eov = write_i<i>(vtk_file, field);
if(eov.is_error()){
return eov;
}
}
if constexpr ( (i+1u) < sizeof...(StructT) ){
return iterate_i<i+1u>(vtk_file, field);
}
return saw::make_void();
}
saw::error_or<void> apply(std::ofstream& vtk_file,
const saw::data<sch::CellField<Desc,sch::Struct<sch::Member<StructT,StructN>...>>>& field){
auto meta = field.meta();
saw::data<sch::UInt64> pd_size{1u};
// DIMENSIONS
{
vtk_file << "DIMENSIONS ";
for(saw::data<sch::UInt64> i{0u}; i.get() < Desc::D; ++i){
pd_size = pd_size * meta.at(i);
vtk_file << " " << meta.at(i).get();
}
for(saw::data<sch::UInt64> i{Desc::D}; i.get() < 3u; ++i){
vtk_file << " 1";
}
vtk_file << "\n";
}
if constexpr (sizeof...(StructT) > 0u){
// POINT DATA
{
vtk_file << "POINT_DATA " << pd_size.get() <<"\n";
}
// HEADER TO BODY
{
vtk_file << "\n";
}
return iterate_i<0u>(vtk_file, field);
}
return saw::make_void();
}
};
}
template<typename Struct>
saw::error_or<void> write_vtk(const std::string_view file_name, const saw::data<Struct>& field){
std::string vtk_file_name{file_name};
std::ofstream vtk_file{vtk_file_name};
if(!vtk_file.is_open()){
return saw::make_error<saw::err::critical>("Could not open file.");
}
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 eov = impl::lbm_vtk_writer<Struct>::apply(vtk_file, field);
return eov;
/*
vtk_file <<"# vtk DataFile Version 3.0\n";
vtk_file <<"Velocity Cavity2D example\n";
vtk_file <<"ASCII\n";
vtk_file <<"DATASET STRUCTURED_POINTS\n";
vtk_file <<"DIMENSIONS "<< dim_x <<" "<<dim_y<<" 1\n";
vtk_file <<"SPACING 1.0 1.0 1.0\n";
vtk_file <<"ORIGIN 0.0 0.0 0.0\n";
vtk_file <<"POINT_DATA "<<(dim_x*dim_y)<<"\n";
vtk_file <<"VECTORS Velocity float\n";
*/
}
}
}
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