-#define R_CUTOFF 20
-#define R2_CUTOFF (R_CUTOFF*R_CUTOFF)
-
-#define SI_M 1
-#define SI_LC 5.43105
-#define LJ_SIGMA SI_LC
-#define LJ_SIGMA_02 (LJ_SIGMA*LJ_SIGMA)
-#define LJ_SIGMA_06 (LJ_SIGMA_02*LJ_SIGMA_02*LJ_SIGMA_02)
-#define LJ_SIGMA_12 (LJ_SIGMA_06*LJ_SIGMA_06)
+// potentials
+#include "potentials/harmonic_oscillator.h"
+#include "potentials/lennard_jones.h"
+#include "potentials/albe.h"
+#ifdef TERSOFF_ORIG
+#include "potentials/tersoff_orig.h" // obsolete & wrong! ;)
+#else
+#include "potentials/tersoff.h"
+#endif