getKeyframeTrackValues method

dynamic getKeyframeTrackValues(dynamic times, Map curves, dynamic initialValue)

Implementation

getKeyframeTrackValues(times, Map curves, initialValue) {
  var prevValue = initialValue;

  var values = [];

  var xIndex = -1;
  var yIndex = -1;
  var zIndex = -1;

  times.forEach((time) {
    if (curves["x"] != null) xIndex = curves["x"]["times"].toList().indexOf(time);
    if (curves["y"] != null) yIndex = curves["y"]["times"].toList().indexOf(time);
    if (curves["z"] != null) zIndex = curves["z"]["times"].toList().indexOf(time);

    // if there is an x value defined for this frame, use that
    if (xIndex != -1) {
      var xValue = curves["x"]["values"][xIndex];
      values.add(xValue);
      prevValue[0] = xValue;
    } else {
      // otherwise use the x value from the previous frame
      values.add(prevValue[0]);
    }

    if (yIndex != -1) {
      var yValue = curves["y"]["values"][yIndex];
      values.add(yValue);
      prevValue[1] = yValue;
    } else {
      values.add(prevValue[1]);
    }

    if (zIndex != -1) {
      var zValue = curves["z"]["values"][zIndex];
      values.add(zValue);
      prevValue[2] = zValue;
    } else {
      values.add(prevValue[2]);
    }
  });

  return values;
}