GitLab

Remove some warnings, and split P2PR which is P2P only for one over R and P2P which can accept a matrix kernel (which can be one over R or anything else), both approaches support SSE and AVX but have not been tested.

Provided generic functions for the evaluation of the direct interactions (pass matrix kernel as argument).

Introduced core width in R_IJ and R_IJK kernels; Fixed R_IJK (scheme: p_i=R_ijk*q_jk, BEWARE: antisymmetry and non_homogeneity strongly affect P2P and MatrixKernel, force not yet implemented); Improved consistency with potential theory for tensorial matrix kernels by defining number of phys vals NPV and number of potential vals NPOT (NRHS=NPV, NLHS=NPOT*NRHS).

Introduced tensorial physical value, potential and force (through templatization of P2PParticleContainer with dimensions NRHS and NLHS, default NRHS=NLHS=1). ChebTensorial kernel does not support this yet (TODO apply same modif on ChebInterpolator).

Implemented a tensorial version for ChebyshevSym kernel (currently in separate files for clarity/safety, TODO finalize and merge), cleaned up tensorial Uniform kernel.

Introduced tensorial kernels for Uniform FMM (NB: Chebyshev UCB incompatible, TODO Chebyshev Sym), tested for kernel R_{,ij} and its derivative, fixed multidimensionnal fft, + some cleanup.