src.gov.nasa.worldwind.animation.PositionAnimator 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.
/*
* 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;
import gov.nasa.worldwind.geom.*;
import gov.nasa.worldwind.util.*;
/**
* @author jym
* @version $Id: PositionAnimator.java 1171 2013-02-11 21:45:02Z dcollins $
*/
public class PositionAnimator extends BasicAnimator
{
protected Position begin;
protected Position end;
protected final PropertyAccessor.PositionAccessor propertyAccessor;
public PositionAnimator(
Interpolator interpolator,
Position begin,
Position end,
PropertyAccessor.PositionAccessor propertyAccessor)
{
super(interpolator);
if (interpolator == null)
{
this.interpolator = new ScheduledInterpolator(10000);
}
if (begin == null || end == null)
{
String message = Logging.getMessage("nullValue.PositionIsNull");
Logging.logger().severe(message);
throw new IllegalArgumentException(message);
}
if (propertyAccessor == null)
{
String message = Logging.getMessage("nullValue.ViewPropertyAccessorIsNull");
Logging.logger().severe(message);
throw new IllegalArgumentException(message);
}
this.begin = begin;
this.end = end;
this.propertyAccessor = propertyAccessor;
}
public void setBegin(Position begin)
{
this.begin = begin;
}
public void setEnd(Position end)
{
this.end = end;
}
public Position getBegin()
{
return this.begin;
}
public Position getEnd()
{
return this.end;
}
public PropertyAccessor.PositionAccessor getPropertyAccessor()
{
return this.propertyAccessor;
}
protected void setImpl(double interpolant)
{
Position newValue = this.nextPosition(interpolant);
if (newValue == null)
return;
boolean success = this.propertyAccessor.setPosition(newValue);
if (!success)
{
this.flagLastStateInvalid();
}
if (interpolant >= 1)
{
this.stop();
}
}
protected Position nextPosition(double interpolant)
{
return Position.interpolateGreatCircle(interpolant, this.begin, this.end);
}
}