gs:shear-tag

[newdep]

Hi Lutz,

what does gs:shear-tag actualy do?

Norman.

[Lutz]

shear is an affine transform which shifts all x and y coordinates of a shape by a certain factor shx and shy. This is the 2D transformation matrix:

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 [   1   shx ]
 [  shy   1  ]

Lines are kept streight and parallel by this transformation.

See also here: http://en.wikipedia.org/wiki/Affine_transformation

and here: http://en.wikipedia.org/wiki/Shear_%28mathematics%29

Lutz

[newdep]

thanks ;-)