The size of 3D gizmo resize handles is resolution-dependent

[passivestar]

Tested versions

v4.3.dev.custom_build [658e97c]

System information

Godot v4.3.dev (658e97c) - macOS 14.4.0 - Vulkan (Forward+) - integrated Apple M1 Max - Apple M1 Max (10 Threads)

Issue description

Their size changes with viewport resolution

Steps to reproduce

Toggle Half Resolution

Minimal reproduction project (MRP)

N/A

[Calinou]

This is the same reason why #14727 occurs in 3.x.

I think handles are drawn using point rendering (as opposed to billboarded quad rendering), which is why they're resolution-dependent. This is partly expected (you don't want them to grow larger when the viewport is resized), but we should ensure the point size is halved in the material handle when Half Resolution is enabled (or when the Scaling 3D > Scale project setting is changed).

This is also a good opportunity to scale handles according to editor scale if we're not doing that already.