Handle mesh creation when blocks are moved to enabled chains

[tracygardner]

Summary

This change extends the mesh creation logic to handle block move events in addition to block creation events. Previously, meshes were only created when a block was first created and connected to an enabled chain. Now, meshes are also created when a block is moved into an enabled chain.

Key Changes

• Added isConnectedMove condition to detect when a block is moved (BLOCK_MOVE event) to an enabled chain with no existing meshes
• Updated the mesh creation condition to trigger on isConnectedMove in addition to existing isEnabledEvent and isImmediateEnabledCreate conditions

Implementation Details

The new logic mirrors the existing isImmediateEnabledCreate pattern, checking for:

• A BLOCK_MOVE change event type
• The block being connected to an enabled chain
• No existing meshes for the block

This ensures that when users move blocks into an enabled chain, the corresponding 3D mesh is created immediately, providing consistent behavior whether blocks are created in-place or moved into position.

https://claude.ai/code/session_018FzuL691PTMx5puGLJd4i1

Summary by CodeRabbit

Release Notes

• Bug Fixes
  • Improved mesh creation and updates when moving blocks connected to the enabled chain, ensuring proper handling of block movement interactions.

[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

📝 Walkthrough

Walkthrough

The updateOrCreateMeshFromBlock function in ui/blockmesh.js now recognizes BLOCK_MOVE events as a trigger for mesh creation or updates when the moved block is connected to the enabled chain and no mesh currently exists.

Changes

Cohort / File(s)	Summary
Mesh Creation Gating Logic ui/blockmesh.js	Modified updateOrCreateMeshFromBlock to treat BLOCK_MOVE events as a mesh creation/update trigger by adding an isConnectedMove condition to the existing `isEnabledEvent

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Possibly related PRs

• Gate mesh visibility to enabled connected block chains #577: Modifies mesh-creation gating and BLOCK_MOVE handling in the same file with connectivity-dependent logic changes.
• Fix block deletion to restore next available block instead of clearing #440: Calls and adapts updateOrCreateMeshFromBlock while passing synthetic BLOCK_CHANGE events, directly intersects with this PR's event-handling modifications.
• Handle BLOCK_CREATE events for nested blocks in snippets #413: Modifies the same function updateOrCreateMeshFromBlock, addressing BLOCK_MOVE handling and related guards.

Suggested labels

codex

Poem

🐰 A block took a stroll, blocks do that,
Moved through the mesh-space, imagine that!
"Should we build a mesh?" the code now thinks,
Connected and empty—yes, quick as a wink! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and specifically describes the main change: extending mesh creation logic to handle blocks moved to enabled chains, which is the core objective of the pull request.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch claude/fix-object-visibility-bug-60you

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