SketchRodGS: Sketch-based Extraction of Slender Geometries for Animating Gaussian Splatting Scenes
This addresses the challenge of animating slender elastic objects in physics simulations for graphics and animation researchers, though it is incremental as it builds on existing Gaussian splatting and sketching techniques.
The paper tackles the problem of extracting polyline representations for slender objects from Gaussian splatting scenes, which lack connectivity and are noisy, by using user sketching and screen-space shortest path analysis, resulting in robust polyline mesh construction demonstrated in real-world examples.
Physics simulation of slender elastic objects often requires discretization as a polyline. However, constructing a polyline from Gaussian splatting is challenging as Gaussian splatting lacks connectivity information and the configuration of Gaussian primitives contains much noise. This paper presents a method to extract a polyline representation of the slender part of the objects in a Gaussian splatting scene from the user's sketching input. Our method robustly constructs a polyline mesh that represents the slender parts using the screen-space shortest path analysis that can be efficiently solved using dynamic programming. We demonstrate the effectiveness of our approach in several in-the-wild examples.