Cannot pass individual splines as driver variable path #85318

New Issue

Emily Jones · 2021-02-02T21:16:36+01:00

Emily Jones commented

2021-02-02 21:16:36 +01:00

System Information
Operating system: Ubuntu 20.10
Graphics card: GTX 1660 Ti

Blender Version
Broken: 04572f08 2.9.3
Worked: unknown

Short description of error

For a driver that depends on a curve, setting the path to splines- [x] is the same as splines

Exact steps for others to reproduce the error

From startup:
Create a Nurbs path
Create a driver for the default cube's z transform
Add a variable to the driver with target id_type = "CURVE" and id = the nurbs curve.
Set the path to splines[0]
Set the scripted expression of the driver to be CUSTOM(spline) where CUSTOM is a Python function added to the driver namespace
The type of the argument the function will receive is CurveSplines rather than Spline.

From provided file:
Open .blend and run test.py to add CUSTOM to the driver namespace. Observe that the type printed out is CurveSplines

minimal_spline_example.blend

**System Information** Operating system: Ubuntu 20.10 Graphics card: GTX 1660 Ti **Blender Version** Broken: 04572f08 2.9.3 Worked: unknown **Short description of error** For a driver that depends on a curve, setting the path to `splines- [x]` is the same as `splines` **Exact steps for others to reproduce the error** From startup: Create a Nurbs path Create a driver for the default cube's z transform Add a variable to the driver with target id_type = "CURVE" and id = the nurbs curve. Set the path to splines[0] Set the scripted expression of the driver to be CUSTOM(spline) where CUSTOM is a Python function added to the driver namespace The type of the argument the function will receive is CurveSplines rather than Spline. From provided file: Open .blend and run test.py to add CUSTOM to the driver namespace. Observe that the type printed out is CurveSplines [minimal_spline_example.blend](https://archive.blender.org/developer/F9609738/minimal_spline_example.blend)

Emily Jones commented

2021-02-02 21:16:36 +01:00

Added subscriber: @Emily_Jones

Falk David commented

2021-02-03 12:34:10 +01:00

Added subscriber: @filedescriptor

Falk David commented

2021-02-03 12:34:10 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Falk David commented

2021-02-03 12:34:10 +01:00

I can confirm this issue. It indeed seems like it still passes the whole collection to the custom python function when it should only pass a single spline.

blender-admin commented

2021-02-04 00:49:44 +01:00

This issue was referenced by 3f90c11621

This issue was referenced by 3f90c11621845424a0b61d293f71ab179e88f56b

Campbell Barton commented

2021-02-04 01:22:26 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Campbell Barton closed this issue

2021-02-04 01:22:26 +01:00

Campbell Barton self-assigned this 2021-02-04 01:22:26 +01:00

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Cannot pass individual splines as driver variable path #85318