The last Bone2D in the chain will scale incorrectly

[thiagola92]

Godot version

v4.2.dev3.official [013e8e3]

System information

Ubuntu 23.04 x86_64

Issue description

When scaling the last Bone2D from the chain, there is a specific case where the bone length will be more than expected.

The main logic is to use the lower value from scale MIN(get_global_scale().x, get_global_scale().y):

godot/scene/2d/skeleton_2d.cpp

Line 328 in c495eb5

rel = Vector2(cos(angle_to_use), sin(angle_to_use)) * (length * MIN(get_global_scale().x, get_global_scale().y));

But this can go wrong when the lower value is negative, attention for (-1, 3) and (1, -3):

Note: This can easily be fixed by getting the absolute value from scale.

rel = Vector2(cos(angle_to_use), sin(angle_to_use)) * (length * MIN(ABS(get_global_scale().x), ABS(get_global_scale().y)));

Note 2: (1, -3) and (-1, 3) are equal after saving the project because the project reload information from transforms and the (-1, 3) is convert to (1, -3).

Steps to reproduce

• Create a scene with Node2D as root
• Add a Skeleton2D
• Add a Bone2D
• Scale Bone2D by (1, -3)

Minimal reproduction project

N/A