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Nodes: Display all links in cycle #107680

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Iliya Katushenock wants to merge 11 commits from mod_moder/blender:tmp_fix_link_validation into main
pull from: mod_moder/blender:tmp_fix_link_validation
merge into: blender:main

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Iliya Katushenock commented 2023-05-06 13:17:39 +02:00
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There is no declared way to inspect links forming cyclic nodes.
Main problem in all previous way to fix that: cyclicity broking all
sortings, there is no way to correct indexing nodes to easy find
cyclicity as incorrect order.
This pull request introduce new link flag NODE_LINK_IN_CYCLE.
This used to mark all links in cycles. To calcutate that, used
Tarjan's strongly connected components algorithm [1].
It have low complexity cost and going be used only in case if cyclicyti
was found by other topology algorithms.

The main benefit of this approach is that possible to display
all the links that make up the cycle:

Main Pull Request
image image
  1. https://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm
There is no declared way to inspect links forming cyclic nodes. Main problem in all previous way to fix that: cyclicity broking all sortings, there is no way to correct indexing nodes to easy find cyclicity as incorrect order. This pull request introduce new link flag `NODE_LINK_IN_CYCLE`. This used to mark all links in cycles. To calcutate that, used Tarjan's strongly connected components algorithm [1]. It have low complexity cost and going be used only in case if cyclicyti was found by other topology algorithms. The main benefit of this approach is that possible to display all the links that make up the cycle: | Main | Pull Request | | -- | -- | | ![image](/attachments/fd6b7bb5-1552-4da6-a87e-ac90a6937785) | ![image](/attachments/50992da8-bcc1-486d-a07c-88b0bdf02ff3) | 1. https://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm
image.png
99 KiB
image.png
99 KiB
Iliya Katushenock added the
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Iliya Katushenock added 3 commits 2023-05-06 13:17:48 +02:00
Iliya Katushenock added this to the Nodes & Physics project 2023-05-06 13:17:53 +02:00
Iliya Katushenock requested review from Hans Goudey 2023-05-06 13:31:46 +02:00
Iliya Katushenock added 1 commit 2023-05-06 13:44:50 +02:00
Iliya Katushenock added 2 commits 2023-05-06 18:45:09 +02:00
Iliya Katushenock added 1 commit 2023-05-07 01:12:23 +02:00
Iliya Katushenock changed title from Fix #107473: Correct way to indicate link in cycles to Correct way to indicate link in cycles 2023-05-10 23:07:43 +02:00
Iliya Katushenock changed title from Correct way to indicate link in cycles to Nodes: Display all links in cycle 2023-05-12 00:13:58 +02:00
Iliya Katushenock added 3 commits 2023-05-26 23:51:01 +02:00
Iliya Katushenock added 1 commit 2023-06-13 10:46:47 +02:00
Hans Goudey requested review from Jacques Lucke 2024-01-30 05:02:48 +01:00
Hans Goudey refused to review 2024-01-30 05:02:48 +01:00
This pull request has changes conflicting with the target branch.
  • source/blender/blenkernel/intern/node_runtime.cc
  • source/blender/blenkernel/intern/node_tree_update.cc
  • source/blender/makesdna/DNA_node_types.h
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git fetch -u tmp_fix_link_validation:mod_moder-tmp_fix_link_validation
git checkout mod_moder-tmp_fix_link_validation
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