What is the difference between hard lines and soft lines in tin?

Problem:

What is the difference between hard lines and soft lines in tin?

Answer:

When using the line element category in the createtin command, you can select hard line and soft line. The two lines play the same role in generating tin forms.
Therefore, the difference between the two lines is only reflected when multiple explicit interpolation is used to analyze the tin surface. The tools supporting Polynomial Interpolation include:
Tinlattice
Tincontour
Tinspot
Surface
Hard wires forcibly interrupt the smoothness of the surface, for example, when performing polynomial smoothing. The soft wire will not damage the surface smoothness.