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Full Version: Geometry unpacked from folder isn't writable? Why?

Root » Rigging » Geometry unpacked from folder isn't writable? Why?

kodra

Dec. 23, 2023 02:26:34

For example, this Python SOP (assuming Base.skel exists):

geo = node.geometry()

skel = geo.unpackFromFolder("/Base.skel")
skel.addAttrib(hou.attribType.Global, "frame_range", (1, 1))
skel.setGlobalAttribValue("frame_range", (1,120))

results in:

hou.GeometryPermissionError: Geometry is read-only.

It's a bit weird tho... geoitself is writable, why isn't the geometry unpacked from it? What's the correct way to handle it? Just create a new hou.Geometry()then copy()?

tamte

Dec. 23, 2023 09:55:21

try doing this:

skel = geo.unpackFromFolder("/Base.skel").freeze()

edward

Jan. 16, 2024 16:13:18

Just to explain, the geometry objects returned by unpackFromFolder() can be a reference to the geometry directly inside the packed primitive for efficiency reasons. So doing "freeze()" gives you a writable copy of the geometry.