Refactor glow layer management to use exclusion instead of inclusion

[tracygardner]

Summary

This PR refactors the glow layer system to use an exclusion-based approach instead of an inclusion-based approach. The sky mesh is now explicitly excluded from the glow layer, and glow effects are applied to all meshes by default rather than maintaining a list of included meshes.

Key Changes

• Glow layer initialization: Changed from using addIncludedOnlyMesh() to using addExcludedMesh() for the sky sphere, allowing the glow layer to affect all meshes except the sky by default
• Glow application: Removed the addIncludedOnlyMesh() call when applying glow to individual meshes, simplifying the glow effect application logic
• Glow removal: Replaced the check for included meshes with a more robust check that scans all scene meshes to determine if any other meshes still have the glow metadata flag set
• Sky mesh exclusion: Added consistent exclusion of the sky mesh from the glow layer whenever a sky is created (in all three sky creation methods in scene.js)

Implementation Details

• The new approach is more maintainable as it doesn't require tracking which meshes are included in the glow layer
• The glow layer is only disposed when no meshes in the scene have the glow metadata flag set, providing better lifecycle management
• Sky mesh exclusion is now handled at creation time rather than at glow layer initialization, ensuring the sky is always excluded regardless of initialization order

https://claude.ai/code/session_01XjT3aKdwLYiYfEiYRWwt26

Summary by CodeRabbit

• Bug Fixes
  • Fixed glow effect rendering to properly exclude the sky from being affected by glowing light effects, ensuring improved visual consistency
  • Optimized the registration and management of glowing effects across multiple mesh elements for better scene performance
  • Improved cleanup logic for glow layer effects to ensure proper resource management in complex scenes

[coderabbitai]

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: a50524ed-9f47-4588-b84d-049cd7b99d34

📥 Commits

Reviewing files that changed from the base of the PR and between 29910b9 and 2fb7fd7.

📒 Files selected for processing (2)

• api/material.js
• api/scene.js

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📝 Walkthrough

Walkthrough

Modified glow layer management in material and scene modules. The glow layer now excludes the sky mesh during initialization and when setting the sky, and removes per-mesh inclusion registration in favor of scene-wide glow metadata scanning during cleanup.

Changes

Cohort / File(s)	Summary
Glow Layer Initialization & Cleanup api/material.js	Refactored glow layer setup to exclude flock.sky at initialization. Removed per-mesh addIncludedOnlyMesh() calls from glowMesh(). Updated clearEffects() to dispose glow layer based on scene-wide mesh glow metadata scan instead of included-only list length.
Sky Assignment Integration api/scene.js	Extended setSky() to exclude the sky mesh from the existing glow layer via addExcludedMesh() after sky creation and assignment.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Poem

🐰 A sky once glowed with misty sheen,
But now it hides from glow's keen gleam—
Excluded bright, the heaven stays,
While meshes dance through glowing rays! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Refactor glow layer management to use exclusion instead of inclusion' directly and clearly summarizes the main architectural change across both modified files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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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-glow-rendering-order-GUYnZ

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