3D Primitives and Conversions - Autodesk AutoCAD 2013 Practical 3D Drafting and Design - page 148

• Axis endpoint : This option allows us to specify the position of the top
vertex of the pyramid. If the pyramid axis is not parallel to the Z axis of
the current user coordinate system, the pyramid is rotated.
• Top radius : This option prompts for the radius of the top face. If not zero,
it creates a pyramid frustum.
Creating walls
The last 3D solid primitive allows us to create some kind of walls in a different way
from the EXTRUDE or PRESSPULL commands.
The POLYSOLID command
The POLYSOLID command (or PSOLID , but too long to be an alias) allows us to cre-
ate solids similar to walls. What this command really does is it takes a wall section
and applies a sweep to it along a path defined by the user. The path can have sev-
eral segments or arcs and its construction is similar to drawing a 2D polyline.