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lemmingapex / trilateration

Solves a formulation of n-D space trilateration problem using a nonlinear least squares optimizer
MIT License
398 stars 106 forks source link

Port to C #19

Open Triuman opened 6 years ago

Triuman commented 6 years ago

Hi @lemmingapex, I need to use this in C. I checked to see whether I can port it to C but I couldn't find the functions you use with "commons-math". What I saw is only the interface for LeastSquaresOptimizer. Can you please provide link for the functions you used in the project?

Great work. Thank you very much.

lemmingapex commented 6 years ago

This trilateration library only depends on apache commons math. If you find a port of apache commons math: https://github.com/Fylax/Apache-Commons-Math3-C- then it should easy to translate this library into c. Make sense?

Triuman commented 6 years ago

Yeah but I could not find a C port. I understand C# better than Java. So I will see if I can port the necessary functions to C from C#.

lemmingapex commented 6 years ago

Ha! Sorry, I didn't look closely at that Fylax library. Didn't realize it was C#. I see your issue now.

My 50 seconds of googling didn't turn much up for a apache commons math c port. The Levenberg–Marquardt algorithm is the key algorithm trilateration utilizes. Is there a library that has an implementation of LMA that might work for you?

http://www.alglib.net/optimization/levenbergmarquardt.php

Triuman commented 6 years ago

Ok I will dig into that. Thank you.

MGasztold commented 6 years ago

Hello,

I am also actively looking for C/C++ implementation of multilateration using Levenberg–Marquardt algorithm. This project in java works really great!

Thank you for pointing the alglib option.

I also tried multilateration approach built in into IT++ library but it is super straightforward and does not handle the noise at all.

If anybody comes across full C++ implementation I would appreciate it a lot if he notifies us here. Thank you :)

xixilight commented 5 years ago

Ok I will dig into that. Thank you.

hello，do you do it with c port? I am also use this in C.

bartfer commented 3 years ago

Hello,

I am also actively looking for C/C++ implementation of multilateration using Levenberg–Marquardt algorithm. This project in java works really great!

Thank you for pointing the alglib option.

I also tried multilateration approach built in into IT++ library but it is super straightforward and does not handle the noise at all.

If anybody comes across full C++ implementation I would appreciate it a lot if he notifies us here. Thank you :)

Hi!

I agree that this project works great and also searched for c++ equivalent unfortunately couldn't find one. Did you manage to find any? I've been exeperimenting with google's ceres-solver and eigen's LM library but the pieces are just not falling in the right place. For some inputs I get good results, almost to all the tests in this lib, but for real life data I'm having issues and this java lib has very good results. I understand how it works so now I will have to understand the c++ part as well in order to port but it's more different how you use it.

bleckers commented 3 years ago

Not quite the same, but here's a trilateration solver in C++

https://github.com/Wayne82/Trilateration

If compiling for Arduino you'll need these too:

Eigen C++ - http://eigen.tuxfamily.org/index.php?title=Main_Page

StandardCplusplus - https://github.com/maniacbug/StandardCplusplus

bartfer commented 3 years ago

Not quite the same, but here's a trilateration solver in C++

https://github.com/Wayne82/Trilateration

If compiling for Arduino you'll need these too:

Eigen C++ - http://eigen.tuxfamily.org/index.php?title=Main_Page

StandardCplusplus - https://github.com/maniacbug/StandardCplusplus

Oh yes I saw this, but it is just simply the linear solution which is not good enough. Thanks for the reply though!