Autodesk AUTOCAD 2006, Command Reference Manual, Page: 220 / 1490

Examples of vector and point calculations
Meaning Expression
Determines unit vector direction from point a to point b. vec1(a,b)
Determines vector of length L in the direction from point a to
point b. L*vec1(a,b)
Determines point b, which is a translation of the point a through
vector v. a+v
Determines point b positioned 5 units away from point a under
the angle of 20 degrees. Note that [5<20] is a vector in polar
coordinates. a+[5<20]
vec(a,b) vec1(a,b) L*vec1(a,b)
a+v
a
b
a
b
a
b
a
b
v
a
a+[5<20]
Calculate the Length of a Vector
The abs function calculates the length of a vector.
abs(v)
Calculates the length of vector v, a nonnegative real number.
In spherical coordinates (dist<ang<ang), the dist is the length of the vector.
The following example calculates the length of the vector [1,2,3]:
abs([1,2,3])
196 | Chapter 5