private void ApplyPullForce(Vector2 pos, MovingTreeBuilder treeBuilder)
 {
     treeBuilder.ApplyPullForce(pullForce, pos, radius);
 }
 private void ApplyDirectedForce(Vector2 dir, MovingTreeBuilder treeBuilder)
 {
     treeBuilder.ApplyDirectedForce(dir * directedForce, Vector2.zero, 200f);
 }