A different kind of Offset Component

I'd like to see an offset component that works a bit different than the current one, or a modification to the current component which allows to switch modes.

The current offsets are calculated relative from the current pixel position. I'd like to have one that converts the values of the horizontal and vertical map into absolute coordinates. This means 0 / black = 0, 1 / white = image width / height. if I provide a horizontal gradient that goes from 0 -> 1 to the horizontal offset and a vertical gradient that goes from 0 -> 1 to the vertical offset there will be no change to the image. If I inverted the horizontal the image would be mirrored horizontally.

Mario, great idea. I'm adding this to our list as "Absolute Offset".

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onyXMaster wrote:...But there is a pitfall -- it will break the sampling out of the 0;1 range which will kill the filter applicability for non-square textures.

Maybe I'm missing something here (if I am please tell me) but the applicability of the offset component is already dead for non-square textures. "Absolute" doesn't affect that.

Please, add one more "short list" vote - and save us a lot of headaches trying to calculate the offset gradients.

Rô

While the "absolute" offset doesn't arrive, here's the workaround that I think onyXMaster was referring to.

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onyXMaster wrote: ......a lot easier without gradient blending/combining.

1) Set up your offset in "absolute" mode (black = pick up from full left / top; white = full right / bottom);
2) Make a black-white gradient in the direction of the offset;
3) Blend the two, normal, 50%.

Now you don't have to scratch your head over complex offsets!

Rô