just curious...

in VEX, why attribute symbol of quaternion is p??

p for what??(which word)

p for point because the type 'point' has four components

Also p@ (point) is just float4 not quaternion
Same way as v@ is a float3 and not directly color, normal or vector
And u@ float2 and not directly texturecoord, etc


To mark an attribute as quaternion, ... you need to use setattribtypeinfo()

Commonly used attributes like p@orient for example is an exception that Houdini automatically marks as quaternion similarly to v@Cd as color or v@N as normal, v@v as vector ...

haha,now i know,thanks a lot