private void _drawColumn()
{
var solidColumn = new Solid3d();
solidColumn.Extrude(Region, d, 0);
AutoCadHelper.AppendAndAddToTransaction(solidColumn);
}
private void _drawBeam()
{
const double angle = (Math.PI / 2);
var solidBeam = new Solid3d();
solidBeam.Extrude(Region, d, 0);
// Rotate along flange
solidBeam.TransformBy(Matrix3d.Rotation(angle, Vector3d.XAxis, Point3d.Origin));
AutoCadHelper.AppendAndAddToTransaction(solidBeam);
}