ComfyUI-GaussianArrowNav

A Gaussian Splatting preview node for ComfyUI with arrow-key navigation.

It is a self-contained alternative to the Preview Gaussian node from ComfyUI-GeometryPack: same inputs, same gsplat.js viewer, but the viewer adds keyboard controls on top of the usual mouse controls.

Node

Preview Gaussian (Arrow Nav) — geompack/visualization

Input	Type	Notes
ply_path	STRING (forced input)	Path to a Gaussian Splatting .ply
extrinsics (optional)	EXTRINSICS	4×4 camera pose for the initial view
intrinsics (optional)	INTRINSICS	3×3 intrinsics for FOV / aspect ratio

The EXTRINSICS / INTRINSICS socket types match GeometryPack's camera nodes, so you can wire those outputs straight in. GeometryPack does not need to be installed for the node itself to work — it ships its own viewer and gsplat bundle.

Controls

Key	Action
↑ / ↓	Zoom in / out
← / →	Orbit horizontally
PageUp / PageDown	Tilt up / down (vertical orbit)
Shift + ↑ / ↓	Tilt up / down (alias)
W / A / S / D	Pan up / left / down / right
Mouse wheel	Zoom (still works)
Left-drag / right-drag	Orbit / pan (still works)

Hover the viewer (or click it) so it has keyboard focus; arrow keys then drive the splat instead of the ComfyUI graph. Focus is released when the pointer leaves, so the keys go back to ComfyUI.

How it works

The navigation is implemented without reimplementing any orbit math. Each held key is translated, once per animation frame, into the exact wheel / mouse-drag events that gsplat's OrbitControls already handles — so dampening, zoom clamping and feel are identical to using the mouse. See the commented block at the bottom of web/viewer_gaussian_arrownav.html.

The viewer (viewer_gaussian_arrownav.html) and web/js/gsplat-bundle.js are vendored copies from the comfy-3d-viewers package so this node does not depend on GeometryPack's startup file-copy step (which would otherwise overwrite them).

Install

Copy this folder into ComfyUI/custom_nodes/ and restart ComfyUI.

Credits & license

This is not a fork. It is an independent package that adapts and vendors GPL-3.0 code from two upstream projects:

• comfy-3d-viewers — the bundled web/viewer_gaussian_arrownav.html and web/js/gsplat-bundle.js are modified copies of that package's viewer_gaussian.html and gsplat-bundle.js.
• ComfyUI-GeometryPack — web/js/gaussian_arrow_preview.js is adapted from its Gaussian preview widget.

gsplat-bundle.js itself bundles gsplat.js (MIT).

Licensed under GPL-3.0-or-later (see LICENSE) to comply with the upstream license.