15 #ifndef BORNAGAIN_CORE_LIBFF_SOMEFORMFACTORS_H 
   16 #define BORNAGAIN_CORE_LIBFF_SOMEFORMFACTORS_H 
Defines complex_t, and a few elementary functions.
 
Defines basic vectors in R^3 and C^3.
 
Some form factor functions.
 
complex_t ffSphere(cvector_t q, double R)
Returns the form factor of a sphere of radius R.