Very small µmagnetic solver written in plain C

Features (and Limitations):

• One tensor kernel performs all physics (Magnetostatic Field , Exchange and Uniaxial Anisotropy)
• Code doesn't support regions with different parameters
• Bidimensional. Just one layer
• Toy simulator to test integration algorithms
• RK4 solver gives accurate result for NIST's Standard Problem Number 4
• Save Magnetization Plot in PNG format
• Routine to write OVF files
• Demag kernel computed in high precission with Newell formula and cropped to float after FFT.

• Thanks to Prof. Dr. Luis López Díaz (USAL) for the original Demagnetizing Tensor Routines in Fortran
• Thanks to Dr. Michele Voto for some tips and talking that helped me to speed up the convolution process