# Tapering (InstanceTopic, 3)

### From Hi.gher. Space

**Tapering** is the process of creating a pyramid from a base shape.

The shape formed from tapering a base shape *x*, represented in CSG notation as *x*T is the set of all points included in the linear sweep between the base object and a given point.

After the tapering, the number of elements change similarly to going down a row in Pascal's triangle. Each count is increased by the count one dimension below it, with the number of vertices increasing by one and a single cell of the shape's dimension being formed. For example, when extruding the cube (which has 8 vertices, 12 edges, 6 faces and of course 1 cell), a cubic pyramid is formed, which will have 8+1 = 9 vertices, 12+8 = 20 edges, 6+12 = 18 faces, 1+6 = 7 cells and a single new teron.