source: sasview/sansmodels/src/sans/models/FractalModel.py @ 943cacb

#!/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\fractal.h
         AND RE-RUN THE GENERATOR SCRIPT

"""

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

def create_FractalModel():
    obj = FractalModel()
    #CFractalModel.__init__(obj) is called by FractalModel constructor
    return obj

class FractalModel(CFractalModel, BaseComponent):
    """ 
    Class that evaluates a FractalModel model. 
    This file was auto-generated from ..\c_extensions\fractal.h.
    Refer to that file and the structure it contains
    for details of the model.
    List of default parameters:
         scale           = 0.05 
         radius          = 5.0 [A]
         fractal_dim     = 2.0 
         cor_length      = 100.0 [A]
         sldBlock        = 2e-006 [1/A^(2)]
         sldSolv         = 6.35e-006 [1/A^(2)]
         background      = 0.0 [1/cm]

    """
        
    def __init__(self):
        """ Initialization """
        
        # Initialize BaseComponent first, then sphere
        BaseComponent.__init__(self)
        #apply(CFractalModel.__init__, (self,)) 
        CFractalModel.__init__(self)
        
        ## Name of the model
        self.name = "FractalModel"
        ## Model description
        self.description =""" The scattering intensity  I(x) = P(|x|)*S(|x|) + background, where
                p(x)= scale * V * delta^(2)* F(x*radius)^(2)
                F(x) = 3*[sin(x)-x cos(x)]/x**3
                where delta = sldBlock -sldSolv.
                scale        =  scale factor * Volume fraction
                radius       =  Block radius
                fractal_dim  =  Fractal dimension
                cor_length  =  Correlation Length
                sldBlock    =  SDL block
                sldSolv  =  SDL solvent
                background   =  background"""
       
        ## Parameter details [units, min, max]
        self.details = {}
        self.details['scale'] = ['', None, None]
        self.details['radius'] = ['[A]', None, None]
        self.details['fractal_dim'] = ['', None, None]
        self.details['cor_length'] = ['[A]', None, None]
        self.details['sldBlock'] = ['[1/A^(2)]', None, None]
        self.details['sldSolv'] = ['[1/A^(2)]', None, None]
        self.details['background'] = ['[1/cm]', None, None]

        ## fittable parameters
        self.fixed=[]
        
        ## non-fittable parameters
        self.non_fittable = []
        
        ## parameters with orientation
        self.orientation_params = []
   
    def __reduce_ex__(self, proto):
        """
        Overwrite the __reduce_ex__ of PyTypeObject *type call in the init of 
        c model.
        """
        return (create_FractalModel,tuple())
        
    def clone(self):
        """ Return a identical copy of self """
        return self._clone(FractalModel())   
        
   
    def run(self, x=0.0):
        """ 
        Evaluate the model
        
        :param x: input q, or [q,phi]
        
        :return: scattering function P(q)
        
        """
        
        return CFractalModel.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 CFractalModel.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 CFractalModel.evalDistribution(self, x)
        
    def calculate_ER(self):
        """ 
        Calculate the effective radius for P(q)*S(q)
        
        :return: the value of the effective radius
        
        """       
        return CFractalModel.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 CFractalModel.set_dispersion(self, parameter, dispersion.cdisp)
        
   
# End of file