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Aboria implements an Embedded Domain Specific Language (eDSL) in C++ for specifying expressions over particles and their neighbours in N dimensional space, with the aim of providing a useful library for implementing particle-based numerical algorithms, for example Molecular Dynamics, Smoothed Particle Hydrodynamics or Radial Basis Functions.

Aboria gives you:

• an STL compatible container class to store a particle set containing a position and unique id for each particle, as well as any number of user-defined variables with arbitrary types.
• the ability to embed each particle set within a hypercube N-dimensional domain with arbitrary periodicity. The underlying data structure can be a cell list, kd-tree or hyper oct-tree.
• flexible neighbourhood queries that return iterators, and can use any integer p-norm distance measure for p > 0 (p == 1: Manhattan distance, p == 2: Euclidean distance, ... , p -> inf: Chebyshev distance)
• an expression template API for forming non-linear operators over the particles. This can be used, for example, to implement interaction forces in Molecular Dynamics.
• an API for forming linear kernel operators from C++ lambda functions, This can be used, for example, to implement Radial Basis Function kernels. These can be wrapped as Eigen matrices in order to solve linear systems based on kernel operators.

Aboria is distributed under a BSD 3-Clause License, see LICENCE for more details. For documentation see the Aboria website. If you are interested in contributing to Aboria, having trouble getting it working or just have a question, send me an email at [email protected] or create a GitHub issue or pull request.