I need c# wpf class that shows billboard geomtries (lines, primitives) in HelixViewport3D

I need c# wpf class that shows billboard geomtries (lines, primitives) in HelixViewport3D

I mean that geometries should be shown as billboard. They will have one fixed screen size at any zoom, like BillboardVisual3D or BillboardTextGroupVisual3D classes in Helix3dToolkit.

This class should be a container for group of primitives (lines) as LinesVisual3D class.
Coordinates of primitives vertices should be defined in screen space, but position of Billboard in 3D space.

This class should have 2 mode:
1. Always faces camera (like BillboardVisual3D or BillboardTextGroupVisual3D)
2. Be fixed in rotation (not always faces camera)

Ικανότητες: .NET, Μοντελοποίηση 3D, Γλώσσα Προγραμματισμού C#, WPF

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Ταυτότητα Εργασίας: #18073684