Add snippet for Jetpack Scenecore material overrides in XR

[amyZepp]

Adding a snippet for Jetpack Scenecore material overrides in XR

[snippet-bot]

Here is the summary of changes.

You are about to add 6 region tags.

• xr/src/main/java/com/example/xr/scenecore/MaterialOverride.kt:29, tag androidxr_scenecore_material_override_createMaterial
• xr/src/main/java/com/example/xr/scenecore/MaterialOverride.kt:38, tag androidxr_scenecore_material_override_setBaseColor
• xr/src/main/java/com/example/xr/scenecore/MaterialOverride.kt:51, tag androidxr_scenecore_material_override_createTexture
• xr/src/main/java/com/example/xr/scenecore/MaterialOverride.kt:60, tag androidxr_scenecore_material_override_setOcclusionTexture
• xr/src/main/java/com/example/xr/scenecore/MaterialOverride.kt:69, tag androidxr_scenecore_material_override_setMaterialOverride
• xr/src/main/java/com/example/xr/scenecore/MaterialOverride.kt:78, tag androidxr_scenecore_material_override_clearMaterialOverride

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[gemini-code-assist]

Summary of Changes

Hello @amyZepp, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a new code snippet aimed at guiding developers on implementing material overrides within Jetpack Scenecore for XR environments. It provides practical, self-contained examples for creating and customizing KhronosPbrMaterial instances, applying various textures, and managing these overrides on GLTF model entities, thereby enhancing the visual flexibility and customization options available in XR applications.

Highlights

• New Snippet for Material Overrides: A new Kotlin file, MaterialOverride.kt, has been added to provide code snippets demonstrating how to manage material overrides in Jetpack Scenecore for XR applications.
• KhronosPbrMaterial Usage: The snippet includes examples for creating a KhronosPbrMaterial with specific alpha modes and customizing its properties, such as setting the base color factor.
• Texture and Occlusion Management: It illustrates how to create textures from file paths and apply them as occlusion textures to KhronosPbrMaterial instances.
• GLTF Model Entity Integration: The new code provides functions to apply and clear material overrides on specific nodes within a GltfModelEntity, offering granular control over model appearance.

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[gemini-code-assist]

Code Review

This pull request adds a new file with code snippets for Jetpack Scenecore material overrides. The overall structure is good for providing documentation snippets. I've found a few areas for improvement. Specifically, some functions create objects but don't use them, which can be confusing in an example. I've suggested assigning them to variables to make the snippets more practical. There's also an issue in setMaterialOverride where a redundant let block and a misplaced snippet end tag would lead to a broken code snippet. I've provided a suggestion to simplify the code and fix the snippet generation. These changes will improve the quality and correctness of the code examples.

[vad710]

LGTM