Define common coordinate system for processing area about jiffle HOT 7 CLOSED

From [email protected] on April 03, 2011 09:22:32
New processing area code is passing all previous unit tests for default behaviour (world coords == image coords) and the first basic tests for working with coordinate transforms.

Added a new interface CoordinateTransform (in the runtime package) with a single method:
Point worldToImage(double x, double y, Point p)

Also added two implementing classes: IdentityCoordinateTransform and AffineCoordinateTransform, plus a utility class CoordinateTransforms.

See the javadocs and the WorldCoordsTest class for how these are used together with the new runtime methods for associating a transform with a source or destination image.

Also added two new functions to the Jiffle language: xstep() which returns pixel width in world units and ystep() which returns pixel height in world units.

Committed to 0.1.x branch (r1611) and trunk (r1612)

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From [email protected] on April 03, 2011 09:41:38
Bah - build is broken because I forgot to update the jiffle demo module. Also seem to be a couple of bugs running the demos.

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From [email protected] on April 03, 2011 12:10:11
Demo programs all working now and JiffleOpImage updated for new runtime API.

Will add more unit tests tomorrow and if all goes well, do the release the day after.

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From [email protected] on April 04, 2011 09:37:38
More code and tests committed: 0.1.x branch (r1616) and trunk (r1617)

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From [email protected] on April 04, 2011 12:00:06
Fixing up the method names a little...

Renaming the Jiffle functions xstep and ystep to xres and yres, because of mapcalc familiarity and also because I find myself talking about "resolution" all the time while writing the user guide.

Renaming JiffleRuntime.setWorldByStepDistance to setWorldByResolution

Renaming JiffleRuntime.setWorldByNumSteps to setWorldByNumPixels

Both of these seem more obvious.

Committed to trunk (r1620) and 0.1.x (r1621)

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From [email protected] on April 05, 2011 03:44:30
Made it mandatory to set the world bounds and resolution BEFORE adding any images with transforms or setting a default transform. An exception is thrown on failing to set the world first. Added tests for this.

trunk (r1627) and 0.1.x branch (r1628)

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From [email protected] on April 05, 2011 07:10:22
Added more unit tests to WorldCoordsTest class plus CoordinateTransformTest class. All passing, so closing this issue now and will deal with further items as separate issues.

This stage was trunk (r1633) and 0.1.x branch (r1634)

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