package sansmodels;

public abstract class SANSModel extends Object {

    public void setNumberOfParameters(int inNumber) {
        numberOfParameters = inNumber;
    }

    public int getNumberOfParameters() {
        return numberOfParameters;
    }

    public void setParametersText(String[] inText) {
        parametersText = inText;
    }

    public void setStructureFactor(StructureFactor inSF) {
        sFactor = inSF;
    }

    public StructureFactor getStructureFactor() {
        return sFactor;
    }

    public String[] getParametersText() {
        return parametersText;
    }

    public double getSmearedFormFactor(double inSigma, double inQbar,
                                       double inShadow) {
        int nord = 20;
        double va, vb, summ, zi, resolution, yyy;
        va = -3.0*inSigma + inQbar;
        if (va < 0) va=0.0;
        vb = 3*inSigma + inQbar;
 
        summ = 0.0;
 
        for(int i=0;i<nord;i++) {
            zi = (Gaussian.z20[i]*(vb-va) + vb + va)/2.0;
            resolution = inShadow/Math.sqrt(2*Math.PI*inSigma*inSigma);
            resolution *= Math.exp((-1.0*Math.pow((zi - inQbar),2.0))
                                   /(2.0*inSigma*inSigma));
            yyy = Gaussian.w20[i]*resolution*getFormFactor(zi);
            summ += yyy;
        }
 
        return (vb-va)/2.0*summ;
    }
    
    public abstract double getFormFactor(double inQ);

    public abstract void setParameters(double[] inParameters);
    public abstract double[] getParameters();
 
    private int numberOfParameters;
    private String[] parametersText;
    private StructureFactor sFactor;
}