Fill Region Option of Select Shortest Path does not React Well Near Ngons in Face Select Mode #48009

New Issue

ronan ducluzeau · 2016-03-30T21:33:25+02:00

ronan ducluzeau commented

2016-03-30 21:33:25 +02:00

System Information
Ubuntu 14.04 64bits Nvidia Titan Black

Blender Version
Broken: 2.77 756ab5e
Worked: (optional)

Short description of error
Fill Region is a new option added to Select Shortest Path operator to select a quad faces area in two clicks.
Option is explained by gif, here.
http://blenderartists.org/forum/showthread.php?395328-A-MODO-artist-learns-Blender-Comparing-the-Basics-VIDEO&p=3029959&viewfull=1#post3029959

Clicking checkbox or using Ctrl Shift RMB click shortcut is working well in vertex select mode.

But in edge select mode, operator does not select faces adjacent to edges clicked by user.
So, result is weird. Selection corresponds to an area of faces + two edges next to it.

In face select mode, operator works well, except in case when a choosen face is in a face loop adjacent to an Ngon or a face loop next to this kind of loop.
In this case, too much faces are selected out of expected region.

Exact steps for others to reproduce the error
Create a cylinder with Ngon caps.
Add edge loops to cylinder.
Select a face in middle of cylinder.
Then, do a Ctrl Shift RMB click on a quad face next to an Ngon cap. -> more faces than expected region are selected.

Select_SP_Fill.blend
In this .blend, select a face in last loop at bottom of cylinder or on next to last loop.

**System Information** Ubuntu 14.04 64bits Nvidia Titan Black **Blender Version** Broken: 2.77 756ab5e Worked: (optional) **Short description of error** Fill Region is a new option added to Select Shortest Path operator to select a quad faces area in two clicks. Option is explained by gif, here. http://blenderartists.org/forum/showthread.php?395328-A-MODO-artist-learns-Blender-Comparing-the-Basics-VIDEO&p=3029959&viewfull=1#post3029959 Clicking checkbox or using Ctrl Shift RMB click shortcut is working well in vertex select mode. But in edge select mode, operator does not select faces adjacent to edges clicked by user. So, result is weird. Selection corresponds to an area of faces + two edges next to it. In face select mode, operator works well, except in case when a choosen face is in a face loop adjacent to an Ngon or a face loop next to this kind of loop. In this case, too much faces are selected out of expected region. **Exact steps for others to reproduce the error** Create a cylinder with Ngon caps. Add edge loops to cylinder. Select a face in middle of cylinder. Then, do a Ctrl Shift RMB click on a quad face next to an Ngon cap. -> more faces than expected region are selected. [Select_SP_Fill.blend](https://archive.blender.org/developer/F299629/Select_SP_Fill.blend) In this .blend, select a face in last loop at bottom of cylinder or on next to last loop.

ronan ducluzeau commented

2016-03-30 21:33:25 +02:00

Changed status to: 'Open'

ronan ducluzeau commented

2016-03-30 21:33:25 +02:00

Added subscriber: @zeauro

ronan ducluzeau commented

2016-03-30 21:50:30 +02:00

An image showing results obtained in edge select mode and face select mode.

An image showing results obtained in edge select mode and face select mode. ![SSP_FR.jpg](https://archive.blender.org/developer/F299634/SSP_FR.jpg)

Campbell Barton self-assigned this 2016-03-31 08:20:20 +02:00

Campbell Barton commented

2016-03-31 16:24:18 +02:00

This isn't exactly a bug.
There are some rules for how the tool works which happen to give odd-results when used next to large ngons (the ngons connect to so many faces that a short path can be traced along them).

Nevertheless, it looks like a bug. I'll check on changing the method so they don't cause issues.

This isn't exactly a bug. There are some rules for how the tool works which happen to give odd-results when used next to large ngons (the ngons connect to so many faces that a short path can be traced along them). Nevertheless, it looks like a bug. I'll check on changing the method so they don't cause issues.

Campbell Barton commented

2016-04-01 14:33:51 +02:00

Changed status from 'Open' to: 'Resolved'

Campbell Barton closed this issue

2016-04-01 14:33:51 +02:00

blender-admin commented

2016-04-01 14:36:06 +02:00

This issue was referenced by c6b27dd4fa

This issue was referenced by c6b27dd4fa02b2609a18ce3aa9c71b64e12b500d

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Fill Region Option of Select Shortest Path does not React Well Near Ngons in Face Select Mode #48009