Parametric

A tube is one example of a parametric object. Varying its parameters creates varying geometry.

Many objects have parameters (settings) that you can change to alter the size or shape of the object. These objects are called parametric objects.

Unlike physical building blocks, with fixed shape and size, the geometric primitives (box, sphere, torus, etc.) are parametric; you can change their dimensions, segment settings, and other features after you create them. Parametric objects respond to changes in their parameters by dynamically updating their properties.

Changing parameters can dramatically alter the structure of an object. For example, you can turn a cylinder into a prism by reducing the number of sides and setting the Smooth option off. Alternatively, you can turn a cone into a four-sided pyramid using the same technique.

You can animate almost all creation parameters for geometric primitives, and interactively change their settings during animation playback.