(5.8^2) + PI
Vector Expressions
A vector expression is a collection of points, vectors, numbers, and functions
combined with the operators in the following table.
Vector operators
Operation
Operator
Groups expressions
( )
Determines the vector product of vectors (as a vector)
&
[a,b,c]&[x,y,z] = [ (b*z) – (c*y) , (c*x) – (a*z) , (a*y) – (b*x) ]
Determines the scalar product of vectors (as a real number)
*
[a,b,c]*[x,y,z] = ax + by + cz
Multiplies, divides a vector by a real number
*, /
a*[x,y,z] = [a*x,a*y,a*z]
Adds, subtracts vectors (points)
+ , –
[a,b,c] + [x,y,z] = [a+x,b+y,c+z]
The following are examples of vector expressions:
A+[1,2,3]
provides the point positioned [1,2,3] units relative to point A.
The expression
[2<45<45] + [2<45<0]
–
[1.02, 3.5, 2]
adds two points and subtracts a third point. The first two points are in spherical
coordinates.
Format Feet and Inches
Enter feet and inches using the following format:
feet'-inches"
or
feet'inches"
or
feet inches
You can separate feet, inches, and fractional inches with a dash, a space, or
nothing. You can use any of the following syntax cases to enter valid feet-inch
formatted values:
■
5’ or 60”
■
5’-9” or 5’ 9” or 5’9”
■
5’-1/2” or 5’ 1/2” or 5’1/2”
190 | Chapter 5
Summary of Contents for AUTOCAD 2006
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