Scale a rectangle in only one direction

[pazeller]

Hi!

I am a noobie and I would like to know how I can create a rectangle which scales vertically (Y) but only in one direction. This works, but my rectangle is scaling in both directions (up and down). I would like to achieve the scaling only towards the up direction. Is this possible? how?
Any clue is welcome

Vincent

[Magic]

Yup, it's fairly simple actually. You just have to translate by the same amount you're scaling. Like this:

ScaleAndTranslate.png (21.61 KiB) Viewed 9587 times

[pazeller]

Ok. Thats what I was thinking about...

From my small experiment, the rectangle is moving a bit (probably because there are small delays)... is there a better solution to avoid this?

Thank you!

Vincent

[Magic]

Well, there are many different ways you could do it. You could draw a black rectangle on the bottom half of the image, or you could use the Mask module to mask the bottom half, etc.

Also, in Magic 2.0 there will be a new feature which eliminates the small delays you noticed .

[artnik]

From experience, the easiest way to achieve this consistently is to translate the rectangle by half its size, such that the edge of it is effectively resting on it's origin point. I.e.translate it first to place an edge in the middle of the screen.

The order of operations is: 1. Translate. 2. Scale based on input. 3. Do other scaling and translating as needed.

Cheers!

[Magic]

Ah yes, that's probably the best . Sometimes I forget the obvious things. What would I do without you guys . I must be getting old.

[artnik]

We're all getting old Eric! ☺

[pazeller]

Thanks all for the help