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Background image position

Hello,

I'd like to understand how nXt works for the position of background images.

As you can see on the picture, I calculated the position of my background to be exactly under a glassy rectangle. The result is that the size of my background looks good but the position not. I positioned it by calculating in pixel taking the size of the render screen in reference.

Did I make a mistake?

Thanks.

F. Martin

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Permalink Reply by Scott Davidson on July 2, 2012 at 11:14am

The way the background placement works is a little different. The Scale X and Y is applied to the Dec (Offset) X and Y. In your case, here are the numbers.

Final background size in X (945) / Total Pixels in X (1804)= Scale X (0.524)
Final background size in Y (490) / Total Pixels in Y (931) = Scale Y (0.526)
(Offset in X (430)/Total Pixels in X (1804)) / Scale X (0.524) = Offset X (0.455)
(Offset in Y (241)/Total Pixels in Y (931)) / Scale Y (0.526) = Offset Y (0.492)

Your approach to the background placement makes sense and perhaps we should change the way the placement works? Are there other situations that such a change would be a problem?

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Permalink Reply by Martin on July 2, 2012 at 12:01pm

Thank you Scott, now it's perfect!

As it's the first time I do something like that, I can't tell you other situations, sorry...

Background image position

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