fix(composer): support Windows dependency file paths in GLTF loader

[hwandersman]

Overview

When a GLTF file is exported on the Windows platform and has texture image files referenced in sub-folders, the generated GLTF file uses backslash character for folder hierarchy: textures\\image.png

The GLTFLoader uses this url in an S3 path like s3://bucket/textures\\image.png which cannot be resolved by S3.

Verifying Changes

Used storybook to load an existing scene in my AWS account. The scene has a model GLTF with textures set up as the following:

"images": [
    {
      "uri": "textures\\plate_baseColor.jpeg"
    },
    {
      "uri": "textures\\tire_mat4_baseColor.jpeg"
    },
    {
      "uri": "textures\\brakes1_baseColor.jpeg"
    },
    {
      "uri": "textures\\brakes1_normal.png"
    }
  ],

Before this fix the textures are not rendered and an error is shown in the browser Console:

THREE.GLTFLoader: Couldn't load texture textures\brakes1_baseColor.jpeg

Failed to load resource: the server responded with a status of 404 (Not Found)

After the fix all textures are loaded successfully.

Testing

Added a 3D model of a Tesla car that can be used for testing. Upload it to your workspace's S3 bucket / resource library and add it to a scene. With this fix all textures in the scene should load.

Legal

This project is available under the Apache 2.0 License.

[TheEvilDev]

We should have a story that covers this case.

[lgtm-com]

This pull request introduces 1 alert when merging 8de93a7 into b76057d - view on LGTM.com

new alerts:

• 1 for Incomplete string escaping or encoding

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[hwandersman]

We should have a story that covers this case.

The issue is only when loading a model from S3, so we need a story that requires manual setup with an AWS account. Added an item in the backlog to do this.

[TheEvilDev]

GLTF/BIn files need to be at the root of the public folder, there's a bug in how we implement the GLTFLoader that I haven't figured out yet, that prevents relative paths from working.

Also, please squash your commits, and make sure to use the commitlint format for commit messages.