I wish to simulate a building which is trapezoidal in shape. The vertices
are curved in shape rather than pointed. There is a continuous glass facade
along the curve.

How can I create that curve in custom floor plan? The only way around to it
that I know is to extrapolate the tangents from two sides to get them to
meet at an intersection and make that approximation in the shape of the
building.

Is there any other way to create that curve and specify the cladding on it?

Thanks in advance!

Suhaas Mathur