2D Rotation Using Matrices
This Demonstration illustrates the concept of rotating a 2D polygon. The rotation matrix is displayed for the current angle. The default polygon is a square that you can modify.
Contributed by: Mito Are and Valeria Antohe (March 2011)
Using elements from Demonstrations by: Sergio Hannibal Mejía (Yokohama International School) and Jaime Rangel-Mondragon
Open content licensed under CC BY-NC-SA
For an angle , multiplying a vector in the plane by the matrix rotates the vector counterclockwise about the origin.