Dear All,
Is there a way to retrieve the untransformed, 'absolute' co-ordinates of a
point from a transformed Graphics2D context?
For example, if I set up a BufferedImage 250x250, grab its Graphics2D
object, perform a bunch of AffineTransforms on it (translate, rotate, etc.)
and then plot a pixel at co-ordinates (0,0) that pixel will obviously not
appear, in the grand scheme of things, at 'absolute' (0,0) within the
BufferedImage as a whole. In pseudo-code...
Image image = new BufferedImage( 250, 250 );
Graphics2D g = image.getGraphics();
g.translate(100,100);
g.setPixel( 0, 0, Color.black );
...this would generate a pixel that, 'in the grand scheme of things' is
actually at point (100,100) within the BufferedImage, even though I plotted
it at point (0,0).
Is there any way I can determine what point (100,100) 'means', in
untransformed terms? I can only assume the Graphics2D object must be doing
something along these lines 'behind the scenes', but is there anyway I can
get at the equivalent 'untransformed' co-ordinate?
Many thanks in advance,
Richard.
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