Blender Foundation: Blender 2.x BF release: Detail: 23395 Mirror + Front Faces Only + Grab = Scaling oddity

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[#23395] Mirror + Front Faces Only + Grab = Scaling oddity

Date:
2010-08-19 22:20 Priority:
3

State:
Closed

Submitted by:
Michael Fletcher (mfletchrd) Assigned to:
Campbell Barton (campbellbarton)

Category:
Sculpting Status:
Fixed / Closed

Relates to: Duplicates:

Patches:

Summary:
Mirror + Front Faces Only + Grab = Scaling oddity

Detailed description

Problem: Sculpting yields partially unpredictable effects. Sometimes the mirrored effect will work while the area you sculpt doesn't work. Sometimes the mirrored effect will be at 2-4x the scale you're operating at. Sometimes the mirrored effect will be displaced to some degree. Working in orthographic view will result differently than perspective view.

Reproducability: 100%

How to reproduce:

Open default scene.
Delete cube.
Load UV sphere.
Enter sculpt mode.
Toggle "Front Faces Only"
Toggle x-mirror
Choose "grab" tool. (Doesn't seem to bother the other tools I typically use.)
Sculpt.

Solution: Deactivate "front faces only"

OS: Windows 7 Pro 64 bit
Blender : Blender 2.3 v 30581
ATI Radeon 3300 HD Graphics Chip

Followup

Message

Date: 2010-08-20 20:28
Sender: Tom Musgrove
Front faces only has had the behaviour changed in the sculpt branch, can you give that a try to see if it fixes the behaviour?

Date: 2010-08-20 21:18
Sender: Jason Wilkins
I need a better description of what is happening that is objectionable.

A symmetrical grab without 'Feather' enabled will have 2x effect at the line of symmetry. This is what is supposed to happen if 'Feather' is disabled.

How is 'Front Faces Only' relevant?

Date: 2010-08-21 10:43
Sender: Vinay Pawar
tested with branches/soc-2010-jwilkins at r31359

Here's a screenshot of grab brush with a "mirror" and "front-faces only" enabled - http://www.pasteall.org/pic/5220. Brush strokes don't get mirrored on both sides, instead get torn and ripped on the other side. With or without "Feather" doesn't seem to help.

Date: 2010-10-22 22:04
Sender: Nicholas Bishop
Michael, can you re-test this with a recent build? I was unable to reproduce this bug. (The attached file doesn't load in sculpt mode or with the grab brush enabled, so I assume some things have changed since you last tested.)

Date: 2010-10-23 02:52
Sender: Jason Wilkins
I recall fixing this bug in my branch but I am unable to recall if the fix got merged.

Date: 2010-12-13 00:03
Sender: Campbell Barton
@Jason, fixed in trunk r33621.
this is just 2 lines changed, should be easy to merge/resolve conflict with sculpt branch.

Attached Files:

Name	Date	Download

Mirror-Faces-Only-Sculpt-Bug.blend	2010-08-19 22:20	Download

Changes:

Field	Old Value	Date	By

status_id	Open	2010-12-13 00:03	campbellbarton
close_date	None	2010-12-13 00:03	campbellbarton
assigned_to	jwilkins	2010-12-13 00:03	campbellbarton
Status	New	2010-12-13 00:03	campbellbarton
Status	None	2010-12-10 11:57	jesterking
assigned_to	none	2010-08-20 18:24	blendix
File Added	12238: Mirror-Faces-Only-Sculpt-Bug.blend	2010-08-19 22:20	mfletchrd