feat(demos/gnm): Added Google GNM demo of parametric avatars in XR Blocks. - #443
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…ocks. Demo: https://www.youtube.com/watch?v=bOFyFlFIcdU This adds an interactive XR Blocks demo of Google's Generative aNthropometric Model (GNM) v3.0, the parametric 3D statistical model of the human head that powers Android XR's Likeness. Features include: - **Full GNM forward function** ported to JavaScript (`GNMModel.js`), evaluating 17,821 vertices, 253 identity, and 383 expression PCA components with sub-millisecond updates. - **Live semantic sampling** ported to JavaScript (`SemanticSampler.js`) for sampling gender, ethnicity, and 20 expression classes (happy, surprise, pucker, etc.) entirely client-side. - **Synchronized UI** across the desktop DOM panel and XR spatial panels (`GNMSpatialUI.js`), allowing users to toggle expressions, gaze, animations, and material modes from within VR. - **Interaction and scene management** (`GNMControls.js`, `GNMScene.js`) featuring joint rotation sliders, gaze tracking, animation drivers, and inspection views (studio, clay, normals, wireframe, landmarks, and skeleton). - **Dynamic asset loading** of the int8-quantized model weights (`gnm_head_web.bin` and `gnm_samplers_web.bin`) from a CDN, keeping the repository lightweight.
dli7319
approved these changes
Jul 19, 2026
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XRBlocks.GNM.Demo.mp4
This adds an interactive XR Blocks demo of Google's Generative aNthropometric Model (GNM) v3.0, the parametric 3D statistical model of the human head that powers Android XR's Likeness.
Features include:
GNMModel.js), evaluating 17,821 vertices, 253 identity, and 383 expression PCA components with sub-millisecond updates.SemanticSampler.js) for sampling gender, ethnicity, and 20 expression classes (happy, surprise, pucker, etc.) entirely client-side.GNMSpatialUI.js), allowing users to toggle expressions, gaze, animations, and material modes from within VR.GNMControls.js,GNMScene.js) featuring joint rotation sliders, gaze tracking, animation drivers, and inspection views (studio, clay, normals, wireframe, landmarks, and skeleton).gnm_head_web.binandgnm_samplers_web.bin) from a CDN, keeping the repository lightweight.