Rotate coordinate space

[ronaaron]

It's useful to be able to rotate the coordinate space; for example, when drawing an analog clock.

I don't see any support for that in NK; did I miss it, or is it simply not there?

[dumblob]

Affine transformations are not supported currently - see vurtun/nuklear#844 (comment) and vurtun/nuklear#841 (comment) .

[ronaaron]

I see. Well, it would be incredibly useful to have at least rotate and translate.

It's not currently possible to draw text at an arbitrary angle or on a path. I mean, it could be made to work by manually applying transforms, but that should be in the API IMO.

[dumblob]

It's not currently possible to draw text at an arbitrary angle or on a path.

That's very advanced stuff actually.

when drawing an analog clock.

Affine transformations for arbitrary vector graphics (lines, curves, ...) is a very different world than affine transformations for fonts. So you're actually proposing significantly increase the size of the library, the API, etc. I'm not sure this'll happen any time soon. But PRs are always welcome 😉.

[ronaaron]

Ah, well.

[ronaaron]

I've implemented support for rotation etc in my fork. The "NK_SPECIAL" command holds the information necessary (x,y,z,theta), and you need to add support in the back-end to handle the commands appropriately.

Here you can see an example of what the end result looks like, as implemented in 8th.

Feel free to merge my changes if you like them.