Add compound support to addAttribute function.

[timothyliu3d]

Description of Changes

What?

Update mgear.core.attribute.addAttribute to work with compound attributes (float2, long3, etc).

Example usage:

from maya import cmds
import mgear.core.attribute as mca

cmds.file(new=True, force=True)
cube, _ = cmds.polyCube()

mca.addAttribute(cube, "myFloat3", "float3", (123, 45, 67))
mca.addAttribute(cube, "myDouble2", "double2", (123, 45))
mca.addAttribute(cube, "myLong3", "long3", (123, 45, 67))
mca.addAttribute(cube, "myLong2", "long2", (123, 45))
mca.addAttribute(cube, "myColor", "float3", (0.1, 0.5, 0.4), usedAsColor=True)

Why?

I needed "float2" attribute types when using ComponentGuide.addParam() for UV-related data. I figured extending addAttribute would be a better approach than making new addVec2Attribute and Vec2Param just for this purpose.

Testing Done

• Maya 2026
• Able to build/rebuild MetaHuaman Y-up template.
• Attribute properly exports/imports with SGT file.

Related Issue(s)

N/A

[miquelcampos]

Hi @timothyliu3d Thanks for the PR!