writeShapeValues method

@override void writeShapeValues(ShapeValues values)

Gives values what shapeKey is made from, one by one, so a renderer can tell each frame whether the mesh changed without making a key. A shape of the engine's gives plain numbers; the default gives shapeKey itself.

Implementation

@override
void writeShapeValues(ShapeValues values) {
  values.add(height);
  final points = this.points;
  for (var i = 0; i < points.length; i++) {
    values
      ..add(points[i].dx)
      ..add(points[i].dy);
  }
}