curve normals are sometime wrong #51665

New Issue

matali23 · 2017-05-30T12:07:34+02:00

matali23 commented

2017-05-30 12:07:34 +02:00

System Information
all

Blender Version
Broken: 94a3bc6

Short description of error
some curves get wrong normals, which makes grabing with 'normal' as orientation wrong.

Exact steps for others to reproduce the error
Open attached file curve normal wrong.blend
see how the translate manipulator is aligned to world axis instead of normal axis.

Note that this curve was created by the dxf importer, I don't know if it's related. Recreating the curve from scratch gives correct normals, but it's very time consuming.
Recalculating normals doesn't help.

**System Information** all **Blender Version** Broken: 94a3bc6 **Short description of error** some curves get wrong normals, which makes grabing with 'normal' as orientation wrong. **Exact steps for others to reproduce the error** Open attached file [curve normal wrong.blend](https://archive.blender.org/developer/F612835/curve_normal_wrong.blend) see how the translate manipulator is aligned to world axis instead of normal axis. ![curve normal wrong.PNG](https://archive.blender.org/developer/F612833/curve_normal_wrong.PNG) Note that this curve was created by the dxf importer, I don't know if it's related. Recreating the curve from scratch gives correct normals, but it's very time consuming. Recalculating normals doesn't help.

matali23 commented

2017-05-30 12:07:34 +02:00

Changed status to: 'Open'

matali23 commented

2017-05-30 12:07:34 +02:00

Added subscriber: @matali23

JA 12 commented

2017-05-30 22:36:06 +02:00

Added subscriber: @ja12

JA 12 commented

2017-05-30 22:36:06 +02:00

The spline type is poly, not bezier. Set spline type button on the tool shelf to convert.

Creating a bezier and converting to poly gives the same result, so not sure if this a valid report.

The spline type is poly, not bezier. Set spline type button on the tool shelf to convert. Creating a bezier and converting to poly gives the same result, so not sure if this a valid report.

matali23 commented

2017-06-01 10:08:56 +02:00

poly or bezier, I don't see why the normals shouldn't be calculated correctly?

mathieu menuet commented

2017-06-02 06:50:20 +02:00

Added subscriber: @bliblubli

mathieu menuet commented

2017-06-02 06:50:20 +02:00

I also agree normals should be the same whatever the type is.

Geometricaly speaking, a line doesn't has a unique valid normal in 3D space. But at least one axis must be aligned with the said line.

For consistency, Mesh, poly, bezier, etc. should show the exact same normal.

I also agree normals should be the same whatever the type is. Geometricaly speaking, a line doesn't has a unique valid normal in 3D space. But at least one axis must be aligned with the said line. For consistency, Mesh, poly, bezier, etc. should show the exact same normal.

matali23 commented

2017-06-26 17:13:47 +02:00

any news on this one, to model correctly, a proper normal orientation is required.

blender-admin commented

2017-07-10 06:37:20 +02:00

This issue was referenced by 004a143760

This issue was referenced by 004a14376073257079e77ef21579c5ae1036f0d3

Campbell Barton commented

2017-07-10 08:22:10 +02:00

Changed status from 'Open' to: 'Resolved'

Campbell Barton closed this issue

2017-07-10 08:22:10 +02:00

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curve normals are sometime wrong #51665