the ExtraQuadraticRepulsion class is used to add in extra repulsion for particular atom pairs, if needed, (e.g. for OCbb/OCbb) where the functional form is: fa_rep += (xhi - x)^2 * slope for values of x between xlo and xhi, and fa_rep += (x - xlo ) * extrapolated_slope + ylo where extrapolated slope can be anything, but, to defined a function with continuous derivatives, should be extrapolated_slope = (xhi-xlo)^2*slope. This is the analytical implementation of the "modify_pot" behavior. More...

#include <Etable.hh>

Public Member Functions
	ExtraQuadraticRepulsion ()

Public Attributes
Real	xlo

Real	xhi

Real	slope

Real	extrapolated_slope

Real	ylo

Detailed Description

the ExtraQuadraticRepulsion class is used to add in extra repulsion for particular atom pairs, if needed, (e.g. for OCbb/OCbb) where the functional form is: fa_rep += (xhi - x)^2 * slope for values of x between xlo and xhi, and fa_rep += (x - xlo ) * extrapolated_slope + ylo where extrapolated slope can be anything, but, to defined a function with continuous derivatives, should be extrapolated_slope = (xhi-xlo)^2*slope. This is the analytical implementation of the "modify_pot" behavior.