Greetings,
I'm using v10.6 of GeoTools. I am trying to do something that I think
should be relatively simple -- but perhaps I dont understand matrices well
enough. I am trying to translate, scale, and rotate a point. Translation
seems easy enough -- like I should be able to add the x and y offsets, then
scale and rotate around that same offset.
So Ive tried a number of things similar to this:
final AffineTransform translateTransform =
AffineTransform.getTranslateInstance(geoX, geoY);
final AffineTransform rotateTransform =
AffineTransform.getRotateInstance(Math.toRadians(geoRotate), 0.0, 0.0);
final AffineTransform scaleTransform =
AffineTransform.getScaleInstance(geoScale, geoScale);
Then something like this:
final Point2D sourcePoint = outerRing.get(j);
// translate, rotate, scale
final AffineTransform transform = new
AffineTransform(translateTransform);
transform.concatenate(rotateTransform);
transform.concatenate(scaleTransform);
final Point2D targetPoint = new Point2D();
transform.transform(sourcePoint, targetPoint);
For a source point of [ -95.75, 224.45 ]
The correct transformation should result in [ 716731.24, 3016405.92 ]
Im getting [ 716942.89, 3016333.19 ] which is in the neighborhood, but not
really close enough.
Where am I going wrong here?
Thanks in advance!
Greg
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