source: sasview/sansmodels/src/sans/models/HayterMSAStructure.py @ b461b8fe

#!/usr/bin/env python

##############################################################################
#       This software was developed by the University of Tennessee as part of the
#       Distributed Data Analysis of Neutron Scattering Experiments (DANSE)
#       project funded by the US National Science Foundation.
#
#       If you use DANSE applications to do scientific research that leads to
#       publication, we ask that you acknowledge the use of the software with the
#       following sentence:
#
#       "This work benefited from DANSE software developed under NSF award DMR-0520547."
#
#       copyright 2008, University of Tennessee
##############################################################################


""" 
Provide functionality for a C extension model

:WARNING: THIS FILE WAS GENERATED BY WRAPPERGENERATOR.PY
         DO NOT MODIFY THIS FILE, MODIFY ..\c_extensions\HayterMSA.h
         AND RE-RUN THE GENERATOR SCRIPT

"""

from sans.models.BaseComponent import BaseComponent
from sans_extension.c_models import CHayterMSAStructure
import copy    

def create_HayterMSAStructure():
    obj = HayterMSAStructure()
    #CHayterMSAStructure.__init__(obj) is called by HayterMSAStructure constructor
    return obj

class HayterMSAStructure(CHayterMSAStructure, BaseComponent):
    """ 
    Class that evaluates a HayterMSAStructure model. 
    This file was auto-generated from ..\c_extensions\HayterMSA.h.
    Refer to that file and the structure it contains
    for details of the model.
    List of default parameters:
         effect_radius   = 20.75 [A]
         charge          = 19.0 
         volfraction     = 0.0192 
         temperature     = 318.16 [K]
         saltconc        = 0.0 [M]
         dielectconst    = 71.08 

    """
        
    def __init__(self):
        """ Initialization """
        
        # Initialize BaseComponent first, then sphere
        BaseComponent.__init__(self)
        #apply(CHayterMSAStructure.__init__, (self,)) 
        CHayterMSAStructure.__init__(self)
        
        ## Name of the model
        self.name = "HayterMSAStructure"
        ## Model description
        self.description ="""To calculate the structure factor (the Fourier transform of the
                pair correlation function g(r)) for a system of
                charged, spheroidal objects in a dielectric
                medium.
                When combined with an appropriate form
                factor, this allows for inclusion of
                the interparticle interference effects
                due to screened coulomb repulsion between
                charged particles.
                (Note: charge > 0 required.)
                
                Ref: JP Hansen and JB Hayter, Molecular
                Physics 46, 651-656 (1982).
                """
       
        ## Parameter details [units, min, max]
        self.details = {}
        self.details['effect_radius'] = ['[A]', None, None]
        self.details['charge'] = ['', None, None]
        self.details['volfraction'] = ['', None, None]
        self.details['temperature'] = ['[K]', None, None]
        self.details['saltconc'] = ['[M]', None, None]
        self.details['dielectconst'] = ['', None, None]

        ## fittable parameters
        self.fixed=['effect_radius.width']
        
        ## non-fittable parameters
        self.non_fittable = []
        
        ## parameters with orientation
        self.orientation_params = []

    def __setstate__(self, state):
        """
        restore the state of a model from pickle
        """
        self.__dict__, self.params, self.dispersion = state
        
    def __reduce_ex__(self, proto):
        """
        Overwrite the __reduce_ex__ of PyTypeObject *type call in the init of 
        c model.
        """
        state = (self.__dict__, self.params, self.dispersion)
        return (create_HayterMSAStructure,tuple(), state, None, None)
        
    def clone(self):
        """ Return a identical copy of self """
        return self._clone(HayterMSAStructure())   
        
   
    def run(self, x=0.0):
        """ 
        Evaluate the model
        
        :param x: input q, or [q,phi]
        
        :return: scattering function P(q)
        
        """
        
        return CHayterMSAStructure.run(self, x)
   
    def runXY(self, x=0.0):
        """ 
        Evaluate the model in cartesian coordinates
        
        :param x: input q, or [qx, qy]
        
        :return: scattering function P(q)
        
        """
        
        return CHayterMSAStructure.runXY(self, x)
        
    def evalDistribution(self, x=[]):
        """ 
        Evaluate the model in cartesian coordinates
        
        :param x: input q[], or [qx[], qy[]]
        
        :return: scattering function P(q[])
        
        """
        return CHayterMSAStructure.evalDistribution(self, x)
        
    def calculate_ER(self):
        """ 
        Calculate the effective radius for P(q)*S(q)
        
        :return: the value of the effective radius
        
        """       
        return CHayterMSAStructure.calculate_ER(self)
        
    def set_dispersion(self, parameter, dispersion):
        """
        Set the dispersion object for a model parameter
        
        :param parameter: name of the parameter [string]
        :param dispersion: dispersion object of type DispersionModel
        
        """
        return CHayterMSAStructure.set_dispersion(self, parameter, dispersion.cdisp)
        
   
# End of file