geometry
rotation
find the rotation of a geometric object with respect to a given point
Calling Sequence
Parameters
Description
Examples
rotation(Q, P, g, co, R)
Q
-
the name of the object to be created
P
geometric object
g
the angle of rotation
co
the direction of rotation, either clockwise or counterclockwise
R
(optional) the center of rotation
Let R be a fixed point of the plane, g and co denote the sensed angle. By the rotation we mean the transformation of the plane S onto itself which carries each point P of the plane into the point P1 of the plane such that OP1 = OP and the angle in the direction specified by co.
Point O is called the center of the rotation, and g is called the angle of the rotation.
If the fifth argument is omitted, then the origin is the center of rotation.
For a detailed description of the object created Q, use the routine detail (i.e., detail(Q))
The command with(geometry,rotation) allows the use of the abbreviated form of this command.
See Also
geometry/objects
geometry/transformation
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