A.N.T Landscape Erode function reports error #74604

New Issue

Andrew Price · 2020-03-10T05:18:32+01:00

Andrew Price commented

2020-03-10 05:18:32 +01:00

System Information
Operating system: Win 10
Graphics card: Dual Titan RTX

Blender Version
Broken: 2.82

Short description of error
Clicking "Landscape Eroder" in sidebar creates error

Exact steps for others to reproduce the error
Enable the default A.N.T Landscape Addon that comes with Blender (v0.1.8)
Generate a landscape (N>Create>Landscape>Landscape)
In Landscape tools click "Landscape Eroder". You'll get this error:

//Traceback (most recent call last):
File "C:\Program Files\Blender Foundation\Blender 2.82\2.82\scripts\addons\ant_landscape\ant_functions.py", line 1065, in execute
ob.vertex_groups.active = vg
RuntimeError: Error: RNA_property_pointer_set: expected ID type, not VertexGroup.

location: :-1//

**System Information** Operating system: Win 10 Graphics card: Dual Titan RTX **Blender Version** Broken: 2.82 **Short description of error** Clicking "Landscape Eroder" in sidebar creates error **Exact steps for others to reproduce the error** Enable the default A.N.T Landscape Addon that comes with Blender (v0.1.8) Generate a landscape (N>Create>Landscape>Landscape) In Landscape tools click "Landscape Eroder". You'll get this error: //Traceback (most recent call last): File "C:\Program Files\Blender Foundation\Blender 2.82\2.82\scripts\addons\ant_landscape\ant_functions.py", line 1065, in execute ob.vertex_groups.active = vg RuntimeError: Error: RNA_property_pointer_set: expected ID type, not VertexGroup. location: <unknown location>:-1// ![blender_2020-03-10_14-17-18.png](https://archive.blender.org/developer/F8398469/blender_2020-03-10_14-17-18.png)

Andrew Price commented

2020-03-10 05:18:32 +01:00

Added subscriber: @AndrewPrice

Brendon Murphy commented

2020-03-10 05:38:56 +01:00

Added subscriber: @BrendonMurphy

Brendon Murphy self-assigned this 2020-03-10 05:38:56 +01:00

Brendon Murphy commented

2020-03-10 05:38:56 +01:00

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

Brendon Murphy commented

2020-03-10 05:38:56 +01:00

hi I'll confirm that it's reporting an error yes. However the erosion tool still appears to work. On first run it erodes the mesh and reports error, the ui still appears and settings can be changed. Each change reports the same error and appear to work.
I will look into the error and try to see it fixed withoout disabling the nice erosion feature.
Fix may take a few weeks.
Thanks.

hi I'll confirm that it's reporting an error yes. However the erosion tool still appears to work. On first run it erodes the mesh and reports error, the ui still appears and settings can be changed. Each change reports the same error and appear to work. I will look into the error and try to see it fixed withoout disabling the nice erosion feature. Fix may take a few weeks. Thanks.

Brendon Murphy changed title from ~~A.N.T Landscape "Eroder" completely broken~~ to A.N.T Landscape Erode function reports error

2020-03-10 05:39:50 +01:00

Andrew Price commented

2020-03-10 05:56:12 +01:00

Thank you for the fast response!

Are you sure it successfully performs the function though? In this video it seems to erode the mesh after the function is complete. Though he's using a modified version of the original addon, so I'm not sure if it's the normal behaviour.

Thank you for the fast response! Are you sure it successfully performs the function though? In [this video ](https://youtu.be/bUGkdVrnrug?t=240) it seems to erode the mesh after the function is complete. Though he's using a modified version of the original addon, so I'm not sure if it's the normal behaviour.

Andrew Price commented

2020-03-27 01:10:21 +01:00

Any updates on this? Hoping to use this in a landscape tutorial.

Stas Haas commented

2020-03-27 09:39:22 +01:00

Added subscriber: @girafic

Stas Haas commented

2020-03-27 09:39:22 +01:00

try to open the file "C:\Program Files\Blender Foundation\Blender 2.82\2.82\scripts\addons\ant_landscape\ant_functions.py", scroll to line 1065 and replace with

ob.vertex_groups.active_index = vg.index

Report then if that worked for you.

try to open the file "C:\Program Files\Blender Foundation\Blender 2.82\2.82\scripts\addons\ant_landscape\ant_functions.py", scroll to line 1065 and replace with ``` ob.vertex_groups.active_index = vg.index ``` Report then if that worked for you.

Germano Cavalcante commented

2020-03-27 13:36:42 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-03-27 13:36:43 +01:00

The solution proposed by @girafic seems reasonable.
I'll wait for confirmation if it worked and then commit

The solution proposed by @girafic seems reasonable. I'll wait for confirmation if it worked and then commit

blender-admin commented

2020-03-28 02:14:38 +01:00

This issue was referenced by blender/blender@10bd3fb4cb

This issue was referenced by blender/blender@10bd3fb4cb186f927d8839d2da28eeb90d6722f3

Germano Cavalcante commented

2020-03-28 02:15:15 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Germano Cavalcante closed this issue

2020-03-28 02:15:15 +01:00

Andrew Price commented

2020-03-30 01:27:25 +02:00

Thanks so much! Just tried with the latest build and it seems to work without error now. Beautiful! Cheers

Luis Felipe Peredo Noguez commented

2021-09-01 20:51:02 +02:00

Added subscriber: @renderluz-2

Luis Felipe Peredo Noguez commented

2021-09-01 20:51:02 +02:00

A similar error where the vertex groups for eroding are not being created is present on Blender 3.0 alpha
the mesh do gets eroded, but the vertex groups are not created.

scripts\addons\ant_landscape\ant_functions.py", line 1062, in execute

  ob.vertex_groups.active = vg

RuntimeError: Error: VertexGroup 'capacity' not found in object 'Landscape'

location: :-1

A similar error where the vertex groups for eroding are not being created is present on Blender 3.0 alpha the mesh do gets eroded, but the vertex groups are not created. scripts\addons\ant_landscape\ant_functions.py", line 1062, in execute ``` ob.vertex_groups.active = vg ``` RuntimeError: Error: VertexGroup 'capacity' not found in object 'Landscape' location: <unknown location>:-1

Luis Felipe Peredo Noguez commented

2021-12-26 18:24:43 +01:00

The problem is non existent on 2.93 official, but on the new 3.0 release the eroding vertex weight map creation is broken.

Luis Felipe Peredo Noguez commented

2021-12-26 18:25:31 +01:00

Im going to test the newest build of 3.0

Bill Hails commented

2021-12-30 16:46:37 +01:00

Added subscriber: @billhails

Bill Hails commented

2021-12-30 16:46:37 +01:00

Hi, also hit this bug (version: 3.0.0, branch: master, commit date: 2021-12-02 18:35, hash: blender/blender@f1cca30557) and started digging, the issue seems to be at 1679f2fdbb/ant_landscape/ant_functions.py (L1006) - I added debug to print ob.vertex_groups.keys() before and after assignment and got:

ANT vertex groups before assign ['rainmap', 'scree', 'avalanced', 'water', 'scour', 'deposit', 'flowrate', 'sediment', 'sedimentpct', 'capacity']
ANT vertex groups after assign []

So assigning to ob.data is wiping ob.vertex_groups

Hi, also hit this bug (version: 3.0.0, branch: master, commit date: 2021-12-02 18:35, hash: `blender/blender@f1cca30557`) and started digging, the issue seems to be at https://github.com/blender/blender-addons/blob/1679f2fdbb1373a255b98b69c6dc2f8a90e7170a/ant_landscape/ant_functions.py#L1006 - I added debug to print `ob.vertex_groups.keys()` before and after assignment and got: ``` ANT vertex groups before assign ['rainmap', 'scree', 'avalanced', 'water', 'scour', 'deposit', 'flowrate', 'sediment', 'sedimentpct', 'capacity'] ANT vertex groups after assign [] ``` So assigning to `ob.data` is wiping `ob.vertex_groups`

Bill Hails commented

2022-01-01 13:53:53 +01:00

confirmed, downloaded 2.93 LTS and added the same debug:

        print('ANT vertex groups before assign', ob.vertex_groups.keys())
        ob.data = me
        print('ANT vertex groups after assign', ob.vertex_groups.keys())

output with 2.93:

ANT vertex groups before assign ['rainmap', 'scree', 'avalanced', 'water', 'scour', 'deposit', 'flowrate', 'sediment', 'sedimentpct', 'capacity']
ANT vertex groups after assign ['rainmap', 'scree', 'avalanced', 'water', 'scour', 'deposit', 'flowrate', 'sediment', 'sedimentpct', 'capacity']

I have a working fix for this (save weights before assign, recreate vertex groups after), the resulting vertex groups are visible in the inspector and weight painting shows they have sensible looking values but is seems a very hacky and memory intensive fix for these large meshes.

confirmed, downloaded 2.93 LTS and added the same debug: ``` print('ANT vertex groups before assign', ob.vertex_groups.keys()) ob.data = me print('ANT vertex groups after assign', ob.vertex_groups.keys()) ``` output with 2.93: ``` ANT vertex groups before assign ['rainmap', 'scree', 'avalanced', 'water', 'scour', 'deposit', 'flowrate', 'sediment', 'sedimentpct', 'capacity'] ANT vertex groups after assign ['rainmap', 'scree', 'avalanced', 'water', 'scour', 'deposit', 'flowrate', 'sediment', 'sedimentpct', 'capacity'] ``` I have a working fix for this (save weights before assign, recreate vertex groups after), the resulting vertex groups are visible in the inspector and weight painting shows they have sensible looking values but is seems a very hacky and memory intensive fix for these large meshes.

Jorian commented

2022-01-06 21:37:23 +01:00

Added subscriber: @jorianw

Jorian commented

2022-01-06 21:37:23 +01:00

I don't know much about coding, so I don't really understand what that means... Is there any code or solution i can use to fix this problem?

> In #74604#1281201, @billhails wrote: > confirmed, downloaded 2.93 LTS and added the same debug: > ``` > print('ANT vertex groups before assign', ob.vertex_groups.keys()) > ob.data = me > print('ANT vertex groups after assign', ob.vertex_groups.keys()) > ``` > output with 2.93: > ``` > ANT vertex groups before assign ['rainmap', 'scree', 'avalanced', 'water', 'scour', 'deposit', 'flowrate', 'sediment', 'sedimentpct', 'capacity'] > ANT vertex groups after assign ['rainmap', 'scree', 'avalanced', 'water', 'scour', 'deposit', 'flowrate', 'sediment', 'sedimentpct', 'capacity'] > ``` > I have a working fix for this (save weights before assign, recreate vertex groups after), the resulting vertex groups are visible in the inspector and weight painting shows they have sensible looking values but is seems a very hacky and memory intensive fix for these large meshes. I don't know much about coding, so I don't really understand what that means... Is there any code or solution i can use to fix this problem?

Bill Hails commented

2022-01-08 15:10:09 +01:00

Since you asked, and if you trust me...

Basically the problem is a non-backwards compatible change in the 3.0 blender API means that when you replace an objects mesh with another mesh, the objects vertex groups now all get deleted.
ANT eroder expects them to still be there and crashes attempting to access them.
My fix is to keep a handle on the old vertex groups and copy them back afterwards.

DISCLAIMER Use at your ow risk etc. but it worked for me.
Locate your ant_functions.py in your Blender application files. I'm on a mac so for me that's /Applications/Blender.app/Contents/Resources/3.0/scripts/addons/ant_landscape/ant_functions.py
Make a backup of it just in case.
Replace it with the attached file.
[Re]start blender.

ant_functions.py

Since you asked, and if you trust me... Basically the problem is a non-backwards compatible change in the 3.0 blender API means that when you replace an objects mesh with another mesh, the objects vertex groups now all get deleted. ANT eroder expects them to still be there and crashes attempting to access them. My fix is to keep a handle on the old vertex groups and copy them back afterwards. DISCLAIMER Use at your ow risk etc. but it worked for me. Locate your `ant_functions.py` in your Blender application files. I'm on a mac so for me that's `/Applications/Blender.app/Contents/Resources/3.0/scripts/addons/ant_landscape/ant_functions.py` **Make a backup of it** just in case. Replace it with the attached file. [Re]start blender. [ant_functions.py](https://archive.blender.org/developer/F12796006/ant_functions.py)

Carter Rink commented

2022-02-09 18:59:21 +01:00

Added subscriber: @Cakes

Carter Rink commented

2022-02-09 18:59:21 +01:00

Confirming this worked for me, thanks!

> In #74604#1284952, @billhails wrote: > Since you asked, and if you trust me... > > Basically the problem is a non-backwards compatible change in the 3.0 blender API means that when you replace an objects mesh with another mesh, the objects vertex groups now all get deleted. > ANT eroder expects them to still be there and crashes attempting to access them. > My fix is to keep a handle on the old vertex groups and copy them back afterwards. > > DISCLAIMER Use at your ow risk etc. but it worked for me. > Locate your `ant_functions.py` in your Blender application files. I'm on a mac so for me that's `/Applications/Blender.app/Contents/Resources/3.0/scripts/addons/ant_landscape/ant_functions.py` > **Make a backup of it** just in case. > Replace it with the attached file. > [Re]start blender. > > [ant_functions.py](https://archive.blender.org/developer/F12796006/ant_functions.py) Confirming this worked for me, thanks!

Colin Knueppel commented

2022-02-11 23:25:14 +01:00

Added subscriber: @Colin_Knu

Colin Knueppel commented

2022-02-11 23:25:14 +01:00

Is this going to be fixed in main? The issue persists in the 3.0.1 update.

Gabriel commented

2022-02-21 21:20:34 +01:00

Added subscriber: @KAYOKIIN

Gabriel commented

2022-02-21 21:20:34 +01:00

I tried your fix on Blender 3.0.1 and it worked! Thank you very much!

When clicking on "Landscape Tool" -> "Landscape Eroder", I get all the vertex groups. I just renamed the existing file with "backup" at the end just in case something wouldn't work, then copy/pasted yours.

For Win 10: C:\Program Files\Blender Foundation\Blender 3.0\3.0\scripts\addons\ant_landscape

> In #74604#1284952, @billhails wrote: > Since you asked, and if you trust me... > > Basically the problem is a non-backwards compatible change in the 3.0 blender API means that when you replace an objects mesh with another mesh, the objects vertex groups now all get deleted. > ANT eroder expects them to still be there and crashes attempting to access them. > My fix is to keep a handle on the old vertex groups and copy them back afterwards. > > DISCLAIMER Use at your ow risk etc. but it worked for me. > Locate your `ant_functions.py` in your Blender application files. I'm on a mac so for me that's `/Applications/Blender.app/Contents/Resources/3.0/scripts/addons/ant_landscape/ant_functions.py` > **Make a backup of it** just in case. > Replace it with the attached file. > [Re]start blender. > > [ant_functions.py](https://archive.blender.org/developer/F12796006/ant_functions.py) I tried your fix on Blender 3.0.1 and it worked! Thank you very much! When clicking on "Landscape Tool" -> "Landscape Eroder", I get all the vertex groups. I just renamed the existing file with "backup" at the end just in case something wouldn't work, then copy/pasted yours. For Win 10: C:\Program Files\Blender Foundation\Blender 3.0\3.0\scripts\addons\ant_landscape

Mariam commented

2022-03-21 10:15:16 +01:00

Added subscriber: @Mariam-Songhulashvili

Mariam commented

2022-03-21 10:15:16 +01:00

This also worked on 3.1 Thank you very much

> In #74604#1284952, @billhails wrote: > Since you asked, and if you trust me... > > Basically the problem is a non-backwards compatible change in the 3.0 blender API means that when you replace an objects mesh with another mesh, the objects vertex groups now all get deleted. > ANT eroder expects them to still be there and crashes attempting to access them. > My fix is to keep a handle on the old vertex groups and copy them back afterwards. > > DISCLAIMER Use at your ow risk etc. but it worked for me. > Locate your `ant_functions.py` in your Blender application files. I'm on a mac so for me that's `/Applications/Blender.app/Contents/Resources/3.0/scripts/addons/ant_landscape/ant_functions.py` > **Make a backup of it** just in case. > Replace it with the attached file. > [Re]start blender. > > [ant_functions.py](https://archive.blender.org/developer/F12796006/ant_functions.py) This also worked on 3.1 Thank you very much

eugene commented

2022-03-29 15:02:00 +02:00

Added subscriber: @zelebooba

eugene commented

2022-03-29 15:02:00 +02:00

Thanks! blender 3.1

> In #74604#1304987, @Cakes wrote: >> In #74604#1284952, @billhails wrote: >> Since you asked, and if you trust me... >> >> Basically the problem is a non-backwards compatible change in the 3.0 blender API means that when you replace an objects mesh with another mesh, the objects vertex groups now all get deleted. >> ANT eroder expects them to still be there and crashes attempting to access them. >> My fix is to keep a handle on the old vertex groups and copy them back afterwards. >> >> DISCLAIMER Use at your ow risk etc. but it worked for me. >> Locate your `ant_functions.py` in your Blender application files. I'm on a mac so for me that's `/Applications/Blender.app/Contents/Resources/3.0/scripts/addons/ant_landscape/ant_functions.py` >> **Make a backup of it** just in case. >> Replace it with the attached file. >> [Re]start blender. >> >> [ant_functions.py](https://archive.blender.org/developer/F12796006/ant_functions.py) > > Confirming this worked for me, thanks! Thanks! blender 3.1

Stefan commented

2022-04-01 18:33:28 +02:00

Added subscriber: @sammedia

Stefan commented

2022-04-01 18:33:28 +02:00

You guys are the best! Works perfect in 3.1 and even in the Blender Octane Edition!

> In #74604#1326617, @Mariam-Songhulashvili wrote: >> In #74604#1284952, @billhails wrote: >> Since you asked, and if you trust me... >> >> Basically the problem is a non-backwards compatible change in the 3.0 blender API means that when you replace an objects mesh with another mesh, the objects vertex groups now all get deleted. >> ANT eroder expects them to still be there and crashes attempting to access them. >> My fix is to keep a handle on the old vertex groups and copy them back afterwards. >> >> DISCLAIMER Use at your ow risk etc. but it worked for me. >> Locate your `ant_functions.py` in your Blender application files. I'm on a mac so for me that's `/Applications/Blender.app/Contents/Resources/3.0/scripts/addons/ant_landscape/ant_functions.py` >> **Make a backup of it** just in case. >> Replace it with the attached file. >> [Re]start blender. >> >> [ant_functions.py](https://archive.blender.org/developer/F12796006/ant_functions.py) > > This also worked on 3.1 Thank you very much You guys are the best! Works perfect in 3.1 and even in the Blender Octane Edition!

IOO commented

2022-04-09 17:55:09 +02:00

Added subscriber: @IOOLEE

IOO commented

2022-04-09 17:55:09 +02:00

thanks!This bug still exists in the 3.2alpha

> In #74604#1284952, @billhails wrote: > Since you asked, and if you trust me... > > Basically the problem is a non-backwards compatible change in the 3.0 blender API means that when you replace an objects mesh with another mesh, the objects vertex groups now all get deleted. > ANT eroder expects them to still be there and crashes attempting to access them. > My fix is to keep a handle on the old vertex groups and copy them back afterwards. > > DISCLAIMER Use at your ow risk etc. but it worked for me. > Locate your `ant_functions.py` in your Blender application files. I'm on a mac so for me that's `/Applications/Blender.app/Contents/Resources/3.0/scripts/addons/ant_landscape/ant_functions.py` > **Make a backup of it** just in case. > Replace it with the attached file. > [Re]start blender. > > [ant_functions.py](https://archive.blender.org/developer/F12796006/ant_functions.py) thanks!This bug still exists in the 3.2alpha

Arnau Duran commented

2022-04-19 15:01:04 +02:00

Added subscriber: @DRN

Arnau Duran commented

2022-04-19 15:01:04 +02:00

Really thank you. Worked on Blender 3.0

> In #74604#1284952, @billhails wrote: > Since you asked, and if you trust me... > > Basically the problem is a non-backwards compatible change in the 3.0 blender API means that when you replace an objects mesh with another mesh, the objects vertex groups now all get deleted. > ANT eroder expects them to still be there and crashes attempting to access them. > My fix is to keep a handle on the old vertex groups and copy them back afterwards. > > DISCLAIMER Use at your ow risk etc. but it worked for me. > Locate your `ant_functions.py` in your Blender application files. I'm on a mac so for me that's `/Applications/Blender.app/Contents/Resources/3.0/scripts/addons/ant_landscape/ant_functions.py` > **Make a backup of it** just in case. > Replace it with the attached file. > [Re]start blender. > > [ant_functions.py](https://archive.blender.org/developer/F12796006/ant_functions.py) Really thank you. Worked on Blender 3.0

Zie4reeZ ooPh7aiy commented

2022-06-12 11:02:16 +02:00

Added subscribers: @bill-1, @dooZaev4

Zie4reeZ ooPh7aiy commented

2022-06-12 11:02:16 +02:00

Blender 3.2.0 here, issue still present, and @bill-1 Hails's ant_functions.py file still does the trick.

> In #74604#1284952, @billhails wrote: > Since you asked, and if you trust me... > > Basically the problem is a non-backwards compatible change in the 3.0 blender API means that when you replace an objects mesh with another mesh, the objects vertex groups now all get deleted. > ANT eroder expects them to still be there and crashes attempting to access them. > My fix is to keep a handle on the old vertex groups and copy them back afterwards. > > DISCLAIMER Use at your ow risk etc. but it worked for me. > Locate your `ant_functions.py` in your Blender application files. I'm on a mac so for me that's `/Applications/Blender.app/Contents/Resources/3.0/scripts/addons/ant_landscape/ant_functions.py` > **Make a backup of it** just in case. > Replace it with the attached file. > [Re]start blender. > > [ant_functions.py](https://archive.blender.org/developer/F12796006/ant_functions.py) Blender 3.2.0 here, issue still present, and @bill-1 Hails's ant_functions.py file still does the trick.

郑雄 commented

2022-06-19 07:49:49 +02:00

Added subscriber: @Dyrus95

郑雄 commented

2022-06-19 07:49:49 +02:00

This mistake still occurs in version 3.2, but the mistake is solved now, love you guys❤

Paul Mereuta commented

2022-06-19 20:37:27 +02:00

Added subscriber: @palmer13

Paul Mereuta commented

2022-06-19 20:37:27 +02:00

I have the same problem in 3.2. downloading the file and replacing it fixed it, but it's rather uncomfortable for me to download files and replacing them on my computer...
Is the dev team ever going to address this issue and implement this fix?

I have the same problem in 3.2. downloading the file and replacing it fixed it, but it's rather uncomfortable for me to download files and replacing them on my computer... Is the dev team ever going to address this issue and implement this fix?

wu vindar commented

2022-06-23 22:04:37 +02:00

Added subscriber: @vindarjuan

wu vindar commented

2022-06-23 22:04:37 +02:00

同样遇到了问题~解决了！！！This mistake still occurs in version 3.2, but the mistake is solved now, love you guys too~

yuri commented

2022-06-29 07:02:42 +02:00

Added subscriber: @EXELEC

yuri commented

2022-06-29 07:02:54 +02:00

Removed subscriber: @EXELEC

Julius Bastl commented

2022-07-20 16:14:58 +02:00

Added subscriber: @juliusINCREON

Julius Bastl commented

2022-07-20 16:14:58 +02:00

Blender 3.2 - yes also worked for my. Thank you!
Just a quick comment so the thread is staying active, and the dev team hopefully fixes the bug :)
best regards

Blender 3.2 - yes also worked for my. Thank you! Just a quick comment so the thread is staying active, and the dev team hopefully fixes the bug :) best regards

颜鑫波 commented

2022-08-20 15:35:05 +02:00

Added subscriber: @Yanbobo

VlxaDrwvoll commented

2023-09-05 16:17:12 +02:00

Hello from 3.6.2. Thank you for the fix. This still appears to be intact (both bug & fix).

I did find that, after generating the landscape, its best to hit the "Landscape Eroder" button in the "Create" section of the "N" panel, otherwise the Vertex groups didn't get created. Maybe was already specified by another kind folk above but I must have missed it so I'm putting it here for safe keeping!

Hello from 3.6.2. Thank you for the fix. This still appears to be intact (both bug & fix). I did find that, after generating the landscape, its best to hit the "Landscape Eroder" button in the "Create" section of the "N" panel, otherwise the Vertex groups didn't get created. Maybe was already specified by another kind folk above but I must have missed it so I'm putting it here for safe keeping!

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