ViewMatrix about geonbit.ui

[RonenNess]

Hi @Toemsel,

Thank you for the suggestion.

What effect are you trying to achieve with transformations? If you need scaling you should use UserInterface.Active.GlobalScale. Scaling with matrix won't be "anchors aware", eg if you scale up entities will start going off screen, while using UserInterface.Active.GlobalScale scale in a smart way that keeps everything in borders.

Using transformations can help you achieve one of the following effects: rotate around X axis (rotation z and y won't work) and translation.

I added transformations support, but it wasn't as simple as it sound because the transformation should also affect cursor position to detect clicks etc. Merely exporting the spritebatch transformation matrix would result in bad clicking detection.

Anyway here's the commit, in dev branch:

685c04f

• few other commits after it.

You use it like this:

UserInterface.Active.RenderTargetTransformMatrix = someMatrix;.

Few more things you need to be aware of when using this:

1. You have to use render targets for it to work (see this https://github.com/RonenNess/GeonBit.UI#using-render-targets)
2. You need to decide if you want the cursor to be affected by transformations or not. eg. is cursor will be rendered in normal space, or transformed. You can change the behavior with UserInterface.Active.IncludeCursorInRenderTarget.

I don't know when next nuget version be so if you want this feature now you should fetch dev branch and build locally.

Let me know if you need any additional help.
Cheers!

[Toemsel]

Wow, fast answer and fix! 👍

I do not try to scale nor transform the GUI in any way. While working with a 3D camera, the GUI does not adapt to the global world camera. (How should it) In a normal case that wouldn't be required, but I attach GUI elements (buttons) on world objects, which aren't in the ViewPort. Thus, transforming the ViewMatrix also should apply to the GUI. (In my special case). Therefore, I thought about a Transformation Matrix in your library.

Thanks for the fast fix! That did the trick

[RonenNess]

To combine the UI in 3d space you can also use render targets and instead of drawing the render target using sprites batch use it as a texture on a 3d object.

Although this will require manipulating the cursor position in a more tricky way currently not supported.

Anyway glad the fix helped, have fun :)