101 lines
2.2 KiB
C++
101 lines
2.2 KiB
C++
#include <iostream>
|
|
#include <mdspan>
|
|
#include <print>
|
|
#include <stdexcept>
|
|
|
|
#include <netcdf>
|
|
|
|
using namespace std;
|
|
using namespace netCDF;
|
|
|
|
template <typename T>
|
|
void printContentsOfVec(const std::vector<T>& vec) {
|
|
for (const auto& element : vec) {
|
|
cout << element << " ";
|
|
}
|
|
cout << std::endl;
|
|
}
|
|
|
|
template <typename T>
|
|
vector<T> getVarVector(NcVar var) {
|
|
int length = 1;
|
|
for (NcDim dim : var.getDims()) {
|
|
length *= dim.getSize();
|
|
}
|
|
|
|
vector<T> vec(length);
|
|
|
|
var.getVar(vec.data());
|
|
|
|
return vec;
|
|
}
|
|
|
|
template <typename T>
|
|
using arr3d = std::mdspan<
|
|
T,
|
|
std::dextents<
|
|
std::size_t,
|
|
3
|
|
>
|
|
>;
|
|
|
|
|
|
template <typename T>
|
|
void print3DMatrixSlice(arr3d<T> arr, int t) {
|
|
for (int x = 0; x < arr.extent(1); x++) {
|
|
for (int y = 0; y < arr.extent(2); y++) {
|
|
print("{} ", arr[t,x,y]);
|
|
}
|
|
println("");
|
|
}
|
|
}
|
|
|
|
void print3DMatrixSlice(arr3d<double> arr, int t) {
|
|
for (int x = 0; x < arr.extent(1); x++) {
|
|
for (int y = 0; y < arr.extent(2); y++) {
|
|
print("{:>10.4f} ", arr[t,x,y]);
|
|
}
|
|
println("");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Read a 3D matrix from a NetCDF variable.
|
|
* Reads data into a contiguous 1D data vector.
|
|
* Returns a pair of the size of the matrix (in the form of an extent) with the data vector.
|
|
*
|
|
* Inteded usage of this function involves using the two returned values
|
|
* to create an mdspan:
|
|
*
|
|
* auto arr = mdspan(vec.data(), size);
|
|
*/
|
|
template <typename T>
|
|
pair<vector<T>, std::dextents<std::size_t, 3>> get3DMat(NcVar var) {
|
|
if(var.getDimCount() != 3) {
|
|
throw invalid_argument("Variable is not 3D");
|
|
}
|
|
int timeLength = var.getDim(0).getSize();
|
|
int latLength = var.getDim(1).getSize();
|
|
int longLength = var.getDim(2).getSize();
|
|
vector<T> vec(timeLength*latLength*longLength);
|
|
var.getVar(vec.data());
|
|
auto arr = std::mdspan(vec.data(), timeLength, latLength, longLength);
|
|
|
|
return {vec, arr.extents()};
|
|
}
|
|
|
|
int main () {
|
|
netCDF::NcFile data("../../../../data/hydrodynamic_U.h5", netCDF::NcFile::read);
|
|
|
|
multimap< string, NcVar > vars = data.getVars();
|
|
|
|
auto [vec, size] = get3DMat<double>(vars.find("uo")->second);
|
|
|
|
|
|
auto arr = std::mdspan(vec.data(), size);
|
|
|
|
print3DMatrixSlice(arr, 100);
|
|
|
|
return 0;
|
|
}
|