com.unity.cloud.gltfast 6.15.0 Package Notes

✨ Features

Loading KTX textures from data URIs.
(Test) OpenGltfScene: Shortcut Control+X clears the previously loaded glTF. Useful for testing resource deallocation.
(Test) Assets variants of *SubMesh* and *Rainbow Cuboid* for testing import of compressed/uncompressed multi-primitive meshes.
(Test) glTFs with different kinds of image formats and sources.
(Test) *No Normal* test asset.

📈 Improvements

*glTFast* will return a success value of `true` even if an image fails to load (which has not been consistent across the API before). This makes it easier to display assets despite of non-critical loading errors. Users who need stricter behavior can resort to monitoring for error logs (see the runtime import manual about logging or the `logger` parameter of [GltfImport constructor](xref:GLTFast.GltfImportBase.#ctor\(GLTFast.Loading.IDownloadProvider,GLTFast.IDeferAgent,GLTFast.Materials.IMaterialGenerator,GLTFast.Logging.ICodeLogger\))).
Primitives of a Draco compressed mesh will be decoded into in a single Unity mesh with multiple sub-meshes instead of multiple Unity meshes (thanks Kibsgaard for initiating this in #33).
[Draco for Unity] minimum required version was raised to 5.4.0.
(Performance) Texture data is not copied into managed memory before loading via [Texture2D.LoadImage](xref:UnityEngine.ImageConversion.LoadImage\(UnityEngine.Texture2D,System.Byte[],System.Boolean\)) (applies for Unity 6.0 or newer).
(Performance) Avoid copy of entire data URI string by using `ReadOnlySpan` instead sub-stringing.
(Performance) Base64-encoded data URIs are now decoded into [NativeArray\](xref:Unity.Collections.NativeArray`1) instead of `byte[]`, reducing GC allocations.
[KTX for Unity] minimum required version was raised to 3.6.0.
Up-to-date versions of soft-dependencies [KTX for Unity] or [Draco for Unity] are enforced by raising a compiler error if an outdated version of either of those is installed.

🔧 Bug Fixes

Corrected test cases for `GltfTestModels` importer tests.
Properly dispose GPU instancing buffers after Editor imports.
Multi-primitive, skinned meshes import properly to Unity meshes with multiple sub-meshes.
For Draco compressed meshes, it's now ensured that morph targets are retrieved to completion and resources are disposed properly.
Sampler settings conflicts result in a proper warning message if they cannot be resolved by instantiating the Texture2D (can occur on design-time imports).
Implicitly add normals to the vertex attribute layout if tangents are required (fixes #41).
Properly release native resources bound by morph targets jobs in context of decoding Draco compressed meshes.
Avoid pointless copying of glb-embedded textures if ImageConversion module is disabled anyways.
Avoid download of textures if ImageConversion module is disabled anyways.
Gracefully fail when buffer data URI has incorrect media-type field or undersized content length.
Just like PNG or Jpeg, KTX textures are now loaded readable as well if it's required by the import settings, the platform or for applying multiple sampler settings.
Properly abort if loading of a data URI encoded image failed.
Don't crash when a buffer failed to load when loading from `string`, `byte` arrays or `Stream`.
Return value of [GltfImport](xref:GLTFast.GltfImportBase) loading methods ([Load](xref:GLTFast.GltfImportBase.Load*), [LoadFile](xref:GLTFast.GltfImportBase.LoadFile*), [LoadGltfBinary](xref:GLTFast.GltfImportBase.LoadGltfBinary*), [LoadGltfBinary](xref:GLTFast.GltfImportBase.LoadGltfJson*) and [LoadStream](xref:GLTFast.GltfImportBase.LoadStream*)) has been made consistent.
(Documentation) various broken links fixed.

⚡ API Changes

Broken consistency check between image data URI mediatype against image's mimeType.