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Maniphest T42258

Drivers: `dimensions.x` is always invalid, but `dimensions[0]` works
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Description

System Information
Windows 8.1 x64
Renderer: GeForce GTX 860M/PCIe/SSE2
Vendor: NVIDIA Corporation
Version: 4.4.0

Blender Version
Broken: 2.72.1 4d4da31

Short description of error
Cant use driver variable with Dimensions property, while Scale property is working.

Exact steps for others to reproduce the error
Open blend file

driver_dim.blend64 KBDownload
and look for the driver variables.
bpy.context.active_object.dimesions.x is working just fine in console.

Revisions and Commits

rB Blender
rB6a44865d2e46 Fix T42258: Drivers: `dimensions.x` is always invalid, but `dimensions[0]` works
rBd30abdf3ec28 Fix T42258: Drivers: `dimensions.x` is always invalid, but `dimensions[0]` works

Related Objects

Event Timeline

Mikhail Rachinskiy (alm) created this task.Oct 16 2014, 3:52 PM
Mikhail Rachinskiy (alm) raised the priority of this task from to 90.
Mikhail Rachinskiy (alm) updated the task description. (Show Details)
Mikhail Rachinskiy (alm) added a project: Animation & Rigging.
Mikhail Rachinskiy (alm) edited a custom field.
Mikhail Rachinskiy (alm) added a subscriber: Mikhail Rachinskiy (alm).
Bastien Montagne (mont29) added a subscriber: Bastien Montagne (mont29).Oct 16 2014, 3:54 PM

Yeah, this is a know issue with dimensions… will merge with another report (not the same issue on first look, but actually has the same causes). Thanks for the report anyway.

Bastien Montagne (mont29) lowered the priority of this task from 90 to Normal.Oct 16 2014, 4:05 PM

Hmm, no actually, it’s something different here.

First of all, you are controlling dim using it as parameter, this will never work in any case (dependency cycle).

However, there is something else here, rather strange - dimensions.x is always invalid, but dimensions[0] does work, that’s not normal I think.

Bastien Montagne (mont29) renamed this task from Cant use driver variable with Dimensions property to Drivers: `dimensions.x` is always invalid, but `dimensions[0]` works.Oct 16 2014, 4:06 PM
Bastien Montagne (mont29) added a project: BF Blender.
Bastien Montagne (mont29) added a subscriber: Joshua Leung (aligorith).
Bastien Montagne (mont29) claimed this task.Oct 16 2014, 4:30 PM

Found the glitch, fix incoming.

Bastien Montagne (mont29) changed the task status from Unknown Status to Resolved.Oct 16 2014, 4:32 PM
Bastien Montagne (mont29) added a commit: rBd30abdf3ec28: Fix T42258: Drivers: `dimensions.x` is always invalid, but `dimensions[0]` works.

Closed by commit rBd30abdf3ec28.

Campbell Barton (campbellbarton) mentioned this in BF Blender: Regressions.Oct 21 2014, 11:51 AM
Campbell Barton (campbellbarton) added a commit: rB6a44865d2e46: Fix T42258: Drivers: `dimensions.x` is always invalid, but `dimensions[0]` works.Oct 21 2014, 12:14 PM