Billboard rotation is wrong

[5argon]

It is currently only do a look at from line to camera position, it doesn't take account of camera's rotation yet. You could see the section I commented in LineSegmentTransformSystem.cs if you wanna try tackle this.

[andrew-raphael-lukasik]

I experimented with introducing camera rotation, my 2 conclusions are:

• Calculate quad mesh normal from relative camera position when camera is using perspective projection
• Calculate quad mesh normal from camera rotation when camera is using orthographic projection

[andrew-raphael-lukasik]

src: https://github.com/andrew-raphael-lukasik/ECSLineRenderer/blob/7ab537e23b266128cc5ad89c1cf5a58936a12d39/Scripts/Systems/LineSegmentTransformSystem.cs