doWarmUp method

@protected @override void doWarmUp()

Implementation

@protected
@override
void doWarmUp() {
  _step = 1 / (points.length - 1);

  _preListFloat32x4 = Float32x4List(points.length);

  for (num i = 0, x = 0; i < points.length; x += _step, i++) {
    var index = i.toDouble();
    var t = x.toDouble();

    var vector = SphericalUtil.latLngtoVector3(points[index.toInt()]);

    _preListFloat32x4[index.toInt()] =
        Float32x4(vector.x, vector.y, vector.z, t);
    //x => vector x | y => vector y | z => vector z | w => (t) position
  }

  _lastFloat32x4 = _preListFloat32x4.last;

  var first = _preListFloat32x4.first;
  var last = _preListFloat32x4.last;
  begin = SphericalUtil.vectorToPolarOptimized(first) as T;
  end = SphericalUtil.vectorToPolarOptimized(last) as T;
}