computeLineDistances method

@override LineSegments computeLineDistances()

Implementation

@override
LineSegments computeLineDistances() {
  var geometry = this.geometry;

  if (geometry is BufferGeometry) {
    // we assume non-indexed geometry

    if (geometry.index == null) {
      var positionAttribute = geometry.attributes["position"];
      var lineDistances = Float32Array(positionAttribute.count);

      for (var i = 0, l = positionAttribute.count; i < l; i += 2) {
        _lsstart.fromBufferAttribute(positionAttribute, i);
        _lsend.fromBufferAttribute(positionAttribute, i + 1);

        lineDistances[i] = (i == 0) ? 0 : lineDistances[i - 1];
        lineDistances[i + 1] = lineDistances[i] + _lsstart.distanceTo(_lsend);
      }

      geometry.setAttribute('lineDistance', Float32BufferAttribute(lineDistances, 1, false));
    } else {
      print('three.LineSegments.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.');
    }
  }
  // else if (geometry.isGeometry) {
  //   throw ('three.LineSegments.computeLineDistances() no longer supports three.Geometry. Use three.BufferGeometry instead.');
  // }

  return this;
}