Feat: xy pads WIP

[bboettcher3]

Adds 2 XY pads, one controlling attack and attack shape, the other for the corresponding release params.

Still a WIP as it needs to work with all 3 zoom modes.

[bboettcher3]

Things that still need addressing:

• Thumb drawing when near bounds is sometimes clipped for some reason
• Thumb isn't over the curve, but it probably should be? (or how to display thumb generally)
• Gracefully handling all 3 zoom modes (XY pads currently scale their width, which is only how relative behaves)

[magnetophon]

Thank you very much for this great addition!

• Thumb drawing when near bounds is sometimes clipped for some reason

For me, the Thumbs are always clipped at max attack or release time:

lamb_xy_pad.mp4

In general, the thumb doesn't line up yet.
Does yours behave the same, or is there something wrong on my system only?

• Thumb isn't over the curve, but it probably should be? (or how to display thumb generally)

You mean that you think the thumb should be always on the line of the curve?
I'm not sure if that's possible, except for in absolute mode.
Not sure if it's desirable, I can imagine you wouldn't have enough resolution in the low time ranges, since you'd miss the skew factor that we currently have.
Maybe I misunderstood.

• Gracefully handling all 3 zoom modes (XY pads currently scale their width, which is only how relative behaves)

Mine don't seem to scale their width.
As you can see in this clip, the shortest release is always in the same position, independent from what the attack is set to:

lamb_xy_scale.mp4

Does yours behave differently?
Did I misunderstand your goal?

[magnetophon]

Congratulations on the merge: vizia/vizia#470!
NIH-plug uses an older VIZIA version, how can we get your XY-pad in lamb?