Awesome

LineRenderer3D

Adds functionality similiar to Unity's built-in LineRenderer, but with actual 3D geometry

Performance

This component was built with performance in mind, thanks to leveraging Job System and Burst compiler it is capable of generating huge amounts of geometry without causing a significant performance impact, generating a line with 2048 points at 16 resolution (65k triangles) takes roughly 1ms in Editor on Ryzen 7 5700X

Usage

You can add LineRenderer3D script to an empty GameObject and everything will be generated automatically

Controlling mesh generation

Due to the nature of this component by default it will not generate any mesh by itself, there are three options to control its behaviour:

Option 1 - Set autoUpdate to true

with this option all meshes will be automatically generated every frame, you should use this method if your line is dynamically modified

Option 2 - Manually generate auto complete

you can manually call BeginGenerationAutoComplete() at any time you want, this allows you to make sure that mesh is updated after you set all of the point data, this function will automatically complete mesh generation in LateUpdate() to allow for better parallelization, so make sure it's called before LateUpdate()

Option 3 - Manually generate

you can manually call BeginGeneration() to start mesh generation, this prepares all the data and schedules mesh generation job, which then has to be completed using function CompleteGeneration(), if you want to take full advantage of the job system you shouldn't call CompleteGeneration immediately and instead wait until later in the frame, to allow it to run in parallel to other tasks on the main thread

Setting points

Outside of manually setting points in Editor, there are following methods for setting point data:

AddPoint(Vector3 position, float thickness) - add new point at the end 

SetPoint(int index, Vector3 position, float thickness) - change point at index

RemovePoint(int index) - remove point at index

SetPositions(int positionCount) - change amount of points to positionCount, this will populate the renderer with empty points that you can then modify via SetPoint 

SetPoints(Vector3[] positions, float thickness) - set points to an array of Vector3 positions, can also take an array of float as thickness

For further reference you can use attached example scripts which showcase different ways of controlling this component

Installation

in Unity Editor go to Package Manager -> Add from git URL and use this link: https://github.com/survivorr9049/LineRenderer3D.git

Features

Similiar implementations often encounter issues with uneven thickness due to skewing and inconsistent alignment of vertices, this implementation makes sure that all generated meshes remain high quality and automatically fixes all of these issues

No twisting

Consistent thickness