[Bug]: Rotating, then scaling produces poor results.

[vi]

What happened?

badselect2.webm

Version

2.0.0-beta.14

Platform

Web

Relevant log output

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[CodeDoctorDE]

This is the function that needs to be fixed: https://github.com/LinwoodDev/Butterfly/blob/develop/app/lib/renderers/renderer.dart#L174

The public transform function should try to remove the rotation out of the evaluation and then call the private _transform function with the unrotated values.

[Luciogi]

#742
looks similar

[CodeDoctorDE]

I tried everything but didn't get it working. I will post this here if anyone find a solution:

I'm currently searching for an algorithm to calculate the real scale I need to apply to the rectangle + the offset.

We have given a rotation of the rectangle, the real rectangle (green with x, y, width and height), the expanded rectangle (red with x, y, width and height) and a scale that needs to be applied.
scaleX = 1 and scaleY = 1 is the default and should not change anything.

The output should be the offset position and the updated scaleX and scaleY values.

Feel free to change the given line: https://github.com/LinwoodDev/Butterfly/blob/f18fe8f641ad19a988ad4e95c39d1e34244c31f4/app/lib/renderers/renderer.dart#L229-L255and make a pull request.
Alternatively you could post the formular here and I can translate it into the app

[CodeDoctorDE]

okay, after thinking a bit, i think i've fixed it, try it out at https://preview.butterfly.linwood.dev and comment here if you find any things i've missed

[CodeDoctorDE]

or not... I will try it again...