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Re: Painter and transformations [message #38850 is a reply to message #38844]

Thu, 24 January 2013 00:23

mdelfede
Messages: 1313
Registered: September 2007

Ultimate Contributor

Hi Mirek, I'll append a sample test case which do the transformation in 2 ways, one with discrete commands (Translate, Rotate) and the other with a transformation matrix.
They shows the same drawing done in both ways in 2 controls aside; they should be identical (imho...) but on first one the image is not there because rotation shift out of control.

index.php?t=getfile&id=4024&private=0

The circle is just to show image center point; you can notice that the line is not on left picture, but it's displayed correctly on right one.

If I remove the rotation (in both paths), I get the correct image for boths, as following :

index.php?t=getfile&id=4026&private=0

It seems to me that rotation using discrete 'painter.Rotate()' command does the rotation around a wrong point... or am I missing something ?

Max

Attachment: Transformation.png
(Size: 15.94KB, Downloaded 922 times)
Attachment: Transformations.zip
(Size: 2.31KB, Downloaded 556 times)
Attachment: Transform2.png
(Size: 16.74KB, Downloaded 907 times)

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[Message index]

		Painter and transformations By: mdelfede on Tue, 22 January 2013 18:29
		Re: Painter and transformations By: mirek on Wed, 23 January 2013 12:37
		Re: Painter and transformations By: mdelfede on Thu, 24 January 2013 00:23
		Re: Painter and transformations By: mirek on Thu, 24 January 2013 08:07
		Re: Painter and transformations By: mdelfede on Thu, 24 January 2013 09:17
		Re: Painter and transformations By: mdelfede on Thu, 24 January 2013 10:06

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