LogInA Reddit user survivorr123_ shared their Unity component that leverages Burst and Job system and efficiently handles thousands of points.
LineRenderer3D offers functionality similar to Unity's built-in Line Renderer for drawing lines in 3D space but with actual 3D geometry. Built with performance in mind, it's capable of generating huge amounts of geometry without causing a significant performance impact, thanks to leveraging the Job system and Burst compiler.
According to the developer, generating a line with 2048 points at 16 resolution (resulting in 65k triangles) takes approximately 1 ms in Editor on an AMD Ryzen 7 5700X. Similar implementations often face problems with uneven thickness due to skewing and inconsistent vertex alignment. However, LineRenderer3D ensures that all generated meshes maintain high quality and automatically resolves these issues.
The developer, a Reddit user named survivorr123_, originally created LineRenderer3D to animate a grappling hook in their game. After several months of work, they reworked the tool and published it on GitHub. Compared to Unity's Splines, LineRenderer3D is significantly more efficient. For instance, when creating and animating a simple spline with around 2k triangles, it takes 1.5 ms per update. In contrast, LineRenderer3D can generate 65k triangles in just 1 ms.
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