Tilt works strangely in a poly curve (or other type with U resolution of 1) with only two control points #94837

New Issue

takaaki takeda · 2022-01-12T03:55:32+01:00

takaaki takeda commented

2022-01-12 03:55:32 +01:00

System Information
Operating system: Windows-10-10.0.19042-SP0 64 Bits
Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.86

Blender Version
Broken: version: 3.1.0 Alpha, branch: master, commit date: 2022-01-06 23:21, hash: e6ca0b33e9
Worked: (newest version of Blender that worked as expected)

Short description of error
Curve tilt works strangely if the curve is a straight line with two control points.

I attached a gif animation.

It looks that tilt for first control point does not work, and tilt for second control point is used for first one.
If the curve is extended to three or more control points, tilt works well.

Exact steps for others to reproduce the error
Make a curve object with two control points.
Set spline type to Poly, and make it as a simple line.
Set bevel depth parameter >0.
For clarity, make wireframe ON in viewport display.

Set tilt for first control point to 0.
Set tilt for second control point to not 0 value.
The curve should be a twisted cylinder, but it just rotates with tilt value of second control point.
(It looks that tilt of first control point is not used, and second one is used)

#94837.blend

Note that geometry nodes behaves better here:
T94837_geonodes.blend

**System Information** Operating system: Windows-10-10.0.19042-SP0 64 Bits Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.86 **Blender Version** Broken: version: 3.1.0 Alpha, branch: master, commit date: 2022-01-06 23:21, hash: `e6ca0b33e9` Worked: (newest version of Blender that worked as expected) **Short description of error** Curve tilt works strangely if the curve is a straight line with two control points. I attached a gif animation. ![CurveTilt.gif](https://archive.blender.org/developer/F12801757/CurveTilt.gif) It looks that tilt for first control point does not work, and tilt for second control point is used for first one. If the curve is extended to three or more control points, tilt works well. **Exact steps for others to reproduce the error** Make a curve object with two control points. Set spline type to Poly, and make it as a simple line. Set bevel depth parameter >0. For clarity, make wireframe ON in viewport display. Set tilt for first control point to 0. Set tilt for second control point to not 0 value. The curve should be a twisted cylinder, but it just rotates with tilt value of second control point. (It looks that tilt of first control point is not used, and second one is used) [#94837.blend](https://archive.blender.org/developer/F12801981/T94837.blend) Note that geometry nodes behaves better here: [T94837_geonodes.blend](https://archive.blender.org/developer/F12801979/T94837_geonodes.blend)

takaaki takeda commented

2022-01-12 03:55:32 +01:00

Added subscriber: @popqjp

Philipp Oeser commented

2022-01-12 09:40:13 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2022-01-12 09:40:13 +01:00

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

Philipp Oeser commented

2022-01-12 09:40:13 +01:00

Can confirm, will check.

Note that geometry nodes behaves better here (probably because these are not poly curves internally?:
T94837_geonodes.blend

Can confirm, will check. Note that geometry nodes behaves better here (probably because these are not poly curves internally?: [T94837_geonodes.blend](https://archive.blender.org/developer/F12801979/T94837_geonodes.blend)

Philipp Oeser changed title from ~~Tilt works strangely in a curve with only two control points~~ to Tilt works strangely in a poly curve with only two control points

2022-01-12 10:14:13 +01:00

Philipp Oeser changed title from ~~Tilt works strangely in a poly curve with only two control points~~ to Tilt works strangely in a poly curve (or other type with U resolution of 1) with only two control points

2022-01-12 10:54:07 +01:00

Philipp Oeser self-assigned this 2022-01-12 12:01:27 +01:00

blender-admin commented

2022-01-12 12:03:26 +01:00

This issue was referenced by a6d70eecf4

This issue was referenced by a6d70eecf48ea4d4a5cbbc4c39e88a94462b8490

blender-admin commented

2022-01-12 12:03:26 +01:00

This issue was referenced by fb21201d42

This issue was referenced by fb21201d4244e3bd8f9c01fece2cb14e0ae29d2d

blender-admin commented

2022-01-12 12:03:26 +01:00