Blender Foundation: Blender 2.x BF release: Detail: 25710 Nodegroup created by scripts, do not render well

Log In
New Account

[#25710] Nodegroup created by scripts, do not render well

Date:
2011-01-18 22:00 Priority:
3

State:
Closed

Submitted by:
Fabio Russo (ruesp83) Assigned to:
Lukas Toenne (lukastoenne)

Category:
Node Editor Status:
Fixed / Closed

Relates to: Duplicates:

Patches:

Summary:
Nodegroup created by scripts, do not render well

Detailed description

Hi,
the procedure to verify the bug is:
1)Open Blender
2)Paste the following script in your text editor and press "Run Script"
http://www.pasteall.org/18394/python
3)Go to the node editor and connect the nodes in this mode
http://www.pasteall.org/pic/8150
4)Press F12 and wait for the result of rendering
5)The render is black or dark, but not with the effect of vignetting

The file system-info.txt is attached with the blend

Followup

Message

Date: 2011-01-19 11:46
Sender: Lukas Toenne
This is a problem with the input values of group node sockets vs. internal node sockets:
* The values of a group instance are copied from the socket definition of the group tree
* The socket definition is created whenever the group type is updated, which happens when
a) a group is first created
b) a node is added to the group
c) a link is removed, thereby exposing the target socket
* Changing the input values of an internal node does NOT update the socket definition of the group and does NOT update the socket of this group's instances either.
Updating the group tree type (ntree->owntype) would at least update the group socket definitions, so any instance of the group created *after* changing internal inputs would use the correct values by default.
Updating the values of the *existing* group node instances when the group defaults change is not desirable in any case, because it would overwrite any existing values carefully adjusted by the user.

Date: 2011-01-19 14:39
Sender: Lukas Toenne
Assigned to self

Date: 2011-02-22 21:54
Sender: Lukas Toenne
Fixed by the new groups patch: group sockets are now independent from any internal sockets linked to them. Default values for group inputs can be changed in the group socket column.

Attached Files:

Name	Date	Download

system-info.txt	2011-01-18 22:00	Download
test.blend	2011-01-18 22:00	Download

Changes:

Field	Old Value	Date	By

status_id	Open	2011-02-22 21:54	lukastoenne
close_date	None	2011-02-22 21:54	lukastoenne
Status	New	2011-02-22 21:54	lukastoenne
assigned_to	none	2011-01-19 14:39	lukastoenne
File Added	14628: test.blend	2011-01-18 22:00	ruesp83
File Added	14629: system-info.txt	2011-01-18 22:00	ruesp83