Defines a non-persistent transformation in 2D space. <br>
The following transformations are implemented :
. Translation, Rotation, Scale
. Symmetry with respect to a point and a line.
Complex transformations can be obtained by combining the
previous elementary transformations using the method Multiply.
The transformations can be represented as follow :
V1 V2 T XY XY
| a11 a12 a13 | | x | | x'|
| a21 a22 a23 | | y | | y'|
| 0 0 1 | | 1 | | 1 |
where {V1, V2} defines the vectorial part of the transformation
and T defines the translation part of the transformation.
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1.8.5