Package adaptlil

Class GazeWindow

java.lang.Object
adaptlil.GazeWindow
All Implemented Interfaces:
Component
public class GazeWindow extends Object implements Component
Intended use of this file is to implement a 'window' in which gaze can be analyzed and conclusions/predictions can be drawn. In terms of the real-time visualization prototype, it is used to make invokes adaptovis.adaptations to the charts and analyze if they are working based of the user's gaze data.

  • Field Details

    • windowSizeInMilliseconds

      private float windowSizeInMilliseconds

    • windowSize

      private int windowSize

    • pollingRateInHz

      private int pollingRateInHz

    • bufferIndex

      private int bufferIndex

    • gazeBuffer

      private RecXml[] gazeBuffer

    • mediator

      private AdaptationMediator mediator

    • gazeMetrics

      private GazeMetrics gazeMetrics

  • Constructor Details

    • GazeWindow

      public GazeWindow(float windowSizeInMilliseconds, int pollingRateInHz)
      Parameters:
      windowSizeInMilliseconds -

  • Method Details

    • interpolateMissingValues

      public void interpolateMissingValues()
      Linear adaptlil.interpolation to fill in any values that may be flagged as invalid by the eyetracker. This applies to all attributes in the RecXmlObject

    • toDenseInstance

      public weka.core.Instance toDenseInstance(boolean reduceAttributeNames, boolean useAdditionalGazeMetrics)
      https://weka.sourceforge.io/doc.dev/weka/core/DenseInstance.html Converts the window into an instance than can be used for Weka ML Works by going over each declared field/attribute in each RecXmlObject of each gazeData
      Returns:

    • toINDArray

      public org.nd4j.linalg.api.ndarray.INDArray toINDArray(boolean useAdditionalGazeMetrics)
      Converts each gaze data point (RecXmlObject) into an element for the INDArray. The # of elements in the array is a factor of number of non-null protected/public attributes in the class. E.g. RecXmlOBjects have 3 non-null public attributes and there is a gaze window of size 10. The shape of the INDArray will be 30
      Parameters:
      useAdditionalGazeMetrics -
      Returns:

    • getAttributeList

      public ArrayList<weka.core.Attribute> getAttributeList(boolean reduceAttributeNames, boolean useAdditionalGazeMetrics)
      Gets Attributes used for machine learning classification
      Parameters:
      reduceAttributeNames -
      useAdditionalGazeMetrics -
      Returns:

    • getInstancesFromAttributeList

      public weka.core.DenseInstance getInstancesFromAttributeList(ArrayList<weka.core.Attribute> attributeList, boolean useAdditionalGazeMetrics)
      Creates a DenseInstanceList of all gaze data points (RecXmlObjects) in the window. The DenseInstance list can be used for WEKA
      Parameters:
      attributeList -
      useAdditionalGazeMetrics -
      Returns:

    • calculateAdditionalGazeMetrics

      public void calculateAdditionalGazeMetrics()
      Calculates additional metrics useful for classification and ml training.

    • add

      public int add(RecXml recXml)
      Adds a RecXmlObject to the buffer.
      Parameters:
      recXml -
      Returns:
      The index it was inserted into is returned. -1 is returned if the buffer is full.

    • getInternalIndex

      public int getInternalIndex()
      Internal index pointer for the array holding the gaze data
      Returns:

    • flush

      public void flush()
      Clears the gazeBuffer and resets the internal position.

    • setGazeBuffer

      public void setGazeBuffer(RecXml[] gazeBuffer)

    • setWindowSizeInMilliseconds

      public void setWindowSizeInMilliseconds(float windowSizeInMilliseconds)
      Sets the # of packets that should belong in the GazeData (non-enforcing)
      Parameters:
      windowSizeInMilliseconds -

    • setWindowSize

      public void setWindowSize(int windowSize)

    • getGazeBuffer

      public RecXml[] getGazeBuffer()

    • getWindowSize

      public int getWindowSize()
      Returns the number of individual data points the window can hold
      Returns:

    • getWindowSizeInMilliseconds

      public float getWindowSizeInMilliseconds()
      Returns:
      Returns size of the window in terms of milliseconds

    • isFull

      public boolean isFull()
      Returns:
      returns true if the buffer is full (internal index is equal to the window size)

    • setMediator

      public void setMediator(Mediator mediator)
      Specified by:
      setMediator in interface Component