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java.awt.geom Documentation Differences

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Class AffineTransform

The AffineTransform class represents a 2D affine transform that performs a linear mapping from 2D coordinates to other 2D coordinates that preserves the "straightness" and "parallelness" of lines. Affine transformations can be constructed using sequences of translations scales flips rotations and shears.

Such a coordinate transformation can be represented by a 3 row by 3 column matrix with an implied last row of [ 0 0 1 ]. This matrix transforms source coordinates (x  y) into destination coordinates (x'  y') by considering them to be a column vector and multiplying the coordinate vector by the matrix according to the following process:

 [ x'] [ m00 m01 m02 ] [ x ] [ m00x + m01y + m02 ] [ y'] = [ m10 m11 m12 ] [ y ] = [ m10x + m11y + m12 ] [ 1 ] [ 0 0 1 ] [ 1 ] [ 1 ] 
@version 1.65 1269 07/0311/0102 @author Jim Graham