[quarkz]

Hi,

I have a txt file with data:

Orientation (1 7.87011e-08 0 -7.87011e-08 1 0 0 0 1)
Orientation (1 9.07449e-08 0 -9.07449e-08 1 0 0 0 1)

I have a modified mesh deformation codee coming from oscillatingRotatingMotion.

In that code, I need to read in the 2 tensor values. Actually, I just need the values, whether read in as tensor or not is not important.

I tried:

orientationdict_
(
IOobject
(
"orientationdict",
runTime_.constant(),
mesh_,
IOobject::MUST_READ,
IOobject::NO_WRITE
)
),

tensor orientation = orientationdict.lookup("orientation");

but it doesn't compile. I got the error:

prototype_retract_motionPointPatchVectorField.C:224:3: error: ‘runTime_’ was not declared in this scope
  224 |   runTime_.constant(),
      |   ^~~~~~~~
prototype_retract_motionPointPatchVectorField.C:225:3: error: ‘mesh_’ was not declared in this scope; did you mean ‘mesh’?
  225 |   mesh_,
      |   ^~~~~
      |   mesh
prototype_retract_motionPointPatchVectorField.C:219:3: error: ‘orientationdict_’ was not declared in this scope
  219 |   orientationdict_
      |   ^~~~~~~~~~~~~~~~
prototype_retract_motionPointPatchVectorField.C:231:10: error: expected primary-expression before ‘orientation’
  231 |   tensor orientation = orientationdict.lookup("orientation");

is this the way to do it? I'm a Fortran programmer so my understanding is limited. I got the code searching thru cfd-online forum.

Hope someoe can help to correct me. Thanks.

[quarkz]

I was thinking in terms of how OF uses dictionary.

But then I realised that it's just a piece of C++ code and I can do it the c++ way too.

So to ans my own qn:

My file, consisting of actually 2 tensors

1 3.02823e-07 0 -3.02823e-07 1 0 0 0 1
1 3.26108e-07 0 -3.26108e-07 1 0 0 0 1

and I just need to extract the 2nd value of each tensor.

add

#include <iostream>
#include <fstream>
using namespace std;

to top of code to be modified

and this part to the file reading:

// Read from the text file
	ifstream file;
	
	file.open("orientation2.dat");
	
	string line;
	int i = 0;
	double tmp_orientation, orient[2];
	
	while(file.good() && (getline(file, line)))
	{
		istringstream iss(line);
		
		iss >> tmp_orientation >> orient[i] >> tmp_orientation >> tmp_orientation >> tmp_orientation >> tmp_orientation >> tmp_orientation >> tmp_orientation >> tmp_orientation;
		//cout << orient[i];
	}
	
	file.close();
	
	scalar orient_pitch_old = asin(orient[0]);
	scalar orient_pitch = asin(orient[1]);

So that's it!