# Changes between Version 10 and Version 11 of DevWikiAffineParameters

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Timestamp:
11/27/11 14:12:28 (19 months ago)
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• ## DevWikiAffineParameters

v10 v11
145145=== Shearing parallel to i axis ===
146146
147 Any value of θ,,ij,, which is not plus or minus 90 degrees indicates that shearing parallel to the i axis is required. This produces diamond shaped (non-rectangular) pixels in the output. In this section, we calculate a value for k,,i,, from the specific value of θ,,ij,,. We do this using the configuration in the following diagram:
147Any value of θ,,ij,, which is not plus or minus 90 degrees indicates that shearing parallel to the i axis is required. This produces diamond shaped (non-rectangular) pixels in the output. In this section, we calculate a value for k,,i,, from the provided value for θ,,ij,,. Note that since the rotation of the entire grid does not affect the angle between the two basis vectors (because they are both rotated by the same amount), we solve for k,,i,, in the non-rotated system.
148
149The '''j,,b,,''' basis vector is represented as follows:
150
151[[Image(basisvector_j.png)]]
152
153Illustrated, the '''j,,b,,''' basis vector looks like this:
148154
149155[[Image(shearing_params.png)]]