src.gov.nasa.worldwind.animation.SmoothInterpolator Maven / Gradle / Ivy

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World Wind is a collection of components that interactively display 3D geographic information within Java applications or applets.

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/*
 * Copyright (C) 2012 United States Government as represented by the Administrator of the
 * National Aeronautics and Space Administration.
 * All Rights Reserved.
 */
package gov.nasa.worldwind.animation;

/**
 * @author jym
 * @version $Id: SmoothInterpolator.java 1171 2013-02-11 21:45:02Z dcollins $
 */
public class SmoothInterpolator extends ScheduledInterpolator
{
    private boolean useMidZoom = true;
    private final int MAX_SMOOTHING = 3;
    private final double START = this.useMidZoom ? 0.0 : 0.6;
    private final double STOP = 1.0;

    public SmoothInterpolator(long lengthMillis)
    {
        super(lengthMillis);
    }

    public double nextInterpolant()
    {
        double interpolant = super.nextInterpolant();
        return basicInterpolant(interpolant,
            this.START, this.STOP, this.MAX_SMOOTHING);
    }

    protected static double basicInterpolant(double interpolant, double startInterpolant,
        double stopInterpolant,
        int maxSmoothing)
    {
        double normalizedInterpolant = AnimationSupport.interpolantNormalized(interpolant, startInterpolant,
            stopInterpolant);
        return AnimationSupport.interpolantSmoothed(normalizedInterpolant, maxSmoothing);
    }

     // ============== Helper Functions ======================= //
    // ============== Helper Functions ======================= //
    // ============== Helper Functions ======================= //

    // Map amount range [startAmount, stopAmount] to [0, 1] when amount is inside range.
    
}