/**
* Starts the interpolation process.
*
* <p>A timer is started with an {@link #interpolationPeriod()} period that updates the {@link
* #frame()}'s position, orientation and magnitude. {@link #interpolationStarted()} will return
* {@code true} until {@link #stopInterpolation()} or {@link #toggleInterpolation()} is called.
*
* <p>If {@code period} is positive, it is set as the new {@link #interpolationPeriod()}. The
* previous {@link #interpolationPeriod()} is used otherwise (default).
*
* <p>If {@link #interpolationTime()} is larger than {@link #lastTime()}, {@link
* #interpolationTime()} is reset to {@link #firstTime()} before interpolation starts (and
* inversely for negative {@link #interpolationSpeed()}.
*
* <p>Use {@link #setInterpolationTime(float)} before calling this method to change the starting
* {@link #interpolationTime()}.
*
* <p><b>Attention:</b> The keyFrames must be defined (see {@link #addKeyFrame(GenericFrame,
* float)}) before you startInterpolation(), or else the interpolation will naturally immediately
* stop.
*/
public void startInterpolation(int myPeriod) {
if (myPeriod >= 0) setInterpolationPeriod(myPeriod);
if (!keyFrameList.isEmpty()) {
if ((interpolationSpeed() > 0.0)
&& (interpolationTime() >= keyFrameList.get(keyFrameList.size() - 1).time()))
setInterpolationTime(keyFrameList.get(0).time());
if ((interpolationSpeed() < 0.0) && (interpolationTime() <= keyFrameList.get(0).time()))
setInterpolationTime(keyFrameList.get(keyFrameList.size() - 1).time());
if (keyFrameList.size() > 1) interpolationTimerTask.run(interpolationPeriod());
interpolationStrt = true;
update();
}
}
/**
* Stops an interpolation started with {@link #startInterpolation()}. See {@link
* #interpolationStarted()} and {@link #toggleInterpolation()}.
*/
public void stopInterpolation() {
interpolationTimerTask.stop();
interpolationStrt = false;
}