/// <summary>
/// Called when geometry has been changed.
/// </summary>
protected override void OnModelChanged()
{
var mb = new MeshBuilder();
var p0 = this.Offset; //new Vector3(0, 0, 0);
if (this.InnerDiameter >= this.OuterDiameter)
this.OuterDiameter = this.InnerDiameter + 0.3;
var d = this.Axis;
d.Normalize();
var p1 = p0 - (d * (float)this.Length * 0.5f);
var p2 = p0 + (d * (float)this.Length * 0.5f);
mb.AddPipe(p1, p2, this.InnerDiameter, this.OuterDiameter, 64);
this.Geometry = mb.ToMeshGeometry3D();
}