Basic geometric transformations are: Translation Rotation Scaling Other transformations: Reflection ShearĤ.1 Basic Transformations Translation We translate a 2D point by adding translation distances, tx and ty, to the original coordinate position (x,y): x' = x + tx, y' = y + ty Alternatively, translation can also be specified by the following transformation matrix: 1 0 t x 0 1 t y 0 0 1 Two Dimensional Transformations In many applications, changes in orientations, sizes, and shapes are accomplished with geometric transformations that alter the coordinate descriptions of objects. CS3162 Introduction to Computer Graphics Helena Wong, 2001Ĥ.
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