Simple deform on curve treats vertex handles as vertices. #72201

New Issue

Konstantins Visnevskis · 2019-12-05T16:09:04+01:00

2019-12-05 16:09:04 +01:00

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.30

Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: f6cb5f5449

Short description of error
Simple deform on curve treats vertex handles as vertices, breaking handle alignment (even when set to "Aligned"),
and includes handles into geometry bounds calculation, affecting curvature etc.

Procedural deforms on curve are useful when rigging curve driven deformations, like paper curling.

Exact steps for others to reproduce the error
In the given file, curve's vertices are visible due to broken-up handle alignment.
deform.blend

**System Information** Operating system: Windows-10-10.0.18362 64 Bits Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.30 **Blender Version** Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: `f6cb5f5449` **Short description of error** Simple deform on curve treats vertex handles as vertices, breaking handle alignment (even when set to "Aligned"), and includes handles into geometry bounds calculation, affecting curvature etc. Procedural deforms on curve are useful when rigging curve driven deformations, like paper curling. **Exact steps for others to reproduce the error** In the given file, curve's vertices are visible due to broken-up handle alignment. [deform.blend](https://archive.blender.org/developer/F8191457/deform.blend)

Konstantins Visnevskis commented

2019-12-05 16:09:04 +01:00

Added subscriber: @KonstantinsVisnevskis

Germano Cavalcante commented

2019-12-09 14:56:08 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2019-12-09 14:56:08 +01:00

Not sure if this is really a bug.
There are other cases where affecting the curve point handles may be more desirable.

You can still set the handles alignment to Automatic.

Not sure if this is really a bug. There are other cases where affecting the curve point handles may be more desirable. You can still set the handles alignment to `Automatic`.

Konstantins Visnevskis commented

2019-12-09 16:31:15 +01:00

Although none springs to mind - sure - affecting handles as if they are their own origin points might be a desirable feature in some situation,
Ignoring whether they're set to be aligned is the catch.

Automatic unfortunately doesn't maintain the magnitude/direction, losing the curve flow upon deform

Although none springs to mind - sure - affecting handles as if they are their own origin points might be a desirable feature in some situation, Ignoring whether they're set to be aligned is the catch. Automatic unfortunately doesn't maintain the magnitude/direction, losing the curve flow upon deform

Germano Cavalcante commented

2019-12-12 19:03:48 +01:00

Changed status from 'Open' to: 'Archived'

Germano Cavalcante closed this issue

2019-12-12 19:03:48 +01:00

Germano Cavalcante self-assigned this 2019-12-12 19:03:48 +01:00

Germano Cavalcante commented

2019-12-12 19:03:48 +01:00

Although this feature could be better, this is not a bug but works as designed.
It would be nice if we had how to handle each improvement request, but with the number of reports open daily it is important to make a selection of what really is a bug and what is not (since this is the scope of the bug tracker).

For suggestions on how to improve existing features, please use other channels:
https://wiki.blender.org/wiki/Communication/Contact#User_Feedback_and_Requests

Although this feature could be better, this is not a bug but works as designed. It would be nice if we had how to handle each improvement request, but with the number of reports open daily it is important to make a selection of what really is a bug and what is not (since this is the scope of the bug tracker). For suggestions on how to improve existing features, please use other channels: https://wiki.blender.org/wiki/Communication/Contact#User_Feedback_and_Requests

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Simple deform on curve treats vertex handles as vertices. #72201