//===========================================================================//=-------------------------------------------------------------------------=//= Module history:                                                         =//= - May 18 2007 - Oscar Chavarro: Original base version                   =//=-------------------------------------------------------------------------=//= References:                                                             =//= [FUNK2003], Funkhouser, Thomas.  Min, Patrick. Kazhdan, Michael. Chen,  =//=     Joyce. Halderman, Alex. Dobkin, David. Jacobs, David. "A Search     =//=     Engine for 3D Models", ACM Transactions on Graphics, Vol 22. No1.   =//=     January 2003. Pp. 83-105                                            =//===========================================================================package vsdk.toolkit.media;import vsdk.toolkit.common.VSDK;/**Stores the feature vector for a set of 32 elementsaround a volume or image as described in [FUNK2003]@todo Generalize for variable number of elements and harmonics*/public class FourierShapeDescriptor extends ShapeDescriptor{    /// Check the general attribute description in superclass Entity.    public static final long serialVersionUID = 20070523L;    private double featureVector[];    private static final int numberOfElements = 32;    private static final int numberOfHarmonics = 16;    public FourierShapeDescriptor(String label)    {        super(label);        featureVector = new double[numberOfElements*numberOfHarmonics];    }    /**    Set the Fourier transform (spherical harmonic) for sphere `sphere`, harmonic `harmonic` to complex value <r, i>    */    public void setFeature(int sphere, int harmonic, double r, double i)    {        if ( sphere < 0 || sphere >= numberOfElements || harmonic < 0 || harmonic >= numberOfHarmonics ) {            return;        }        double harmonicAmplitude = Math.sqrt(r*r + i*i);        featureVector[sphere*numberOfHarmonics+harmonic] = harmonicAmplitude;    }    public String toString()    {        String msg;        msg = "SphericalHarmonics amplitudes for " + numberOfElements + " spheres and " + numberOfHarmonics + " harmonics:\n";        int i;        for ( i = 0; i < numberOfElements*numberOfHarmonics; i++ ) {            msg += "  - " + VSDK.formatDouble(featureVector[i]) + "\n";        }        return msg;    }    public double [] getFeatureVector() {        return featureVector;    }    public void setFeatureVector(double vector[]) {        if ( vector.length != numberOfElements*numberOfHarmonics ) {            VSDK.reportMessage(this, VSDK.ERROR, "setFeatureVector",                "Trying to set featurevector from incorrectly sized data!");            return;        }        featureVector = new double[numberOfElements*numberOfHarmonics];        int i;        for ( i = 0; i < featureVector.length; i++ ) {            featureVector[i] = vector[i];        }    }    public void finalize()    {        label = null;        featureVector = null;    }}//===========================================================================//= EOF                                                                     =//===========================================================================