2012

ang(p1,p2) Determines the angle between the X axis and the line (p1,p2),
oriented from p1 to p2. The points are considered 2D, projected on the XY
plane of the current UCS.
ang(apex,p1,p2) Determines the angle between lines (apex,p1) and (apex,p2).
The points are considered 2D, projected on the XY plane of the current UCS.
ang(apex,p1,p2,p) Determines the angle between lines (apex,p1) and (apex,p2).
The lines are considered 3D. The last parameter, point p, is used to define the
orientation of the angle. The angle is measured counterclockwise with respect
to the axis going from apex to p.
The following examples show how angles are measured.
You can determine the angle between the two sides of a triangle using the
ang function, as shown in the following example:
Command: cal
>> Expression: ang(end,end,end)
Select the apex of the angle, and then select the two opposite vertices.
194 | Chapter 4 C Commands