How to import independent line or LineSegments from gltf

Questions
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1

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I make some line in blender and export as gltf.
When I import the GLTF file, I find that all the lines in Blender have become Object3D objects.
Does anyone have a way to import lines through GLTF files?
Or are lines created manually?

2

Line in three.js extends Object3D. Regardless, they should still be drawn as GL_LINEs - extending base Object3D class just allows them to be manipulated on the Scene like everything else.

3

Does that mean you can’t import some special lines from some 3D models (such as roads, etc.)?It is very troublesome to add lines manually

4

Blender cannot yet export points and lines to glTF — only meshes. There was some work-in-progress in https://github.com/KhronosGroup/glTF-Blender-IO/pull/717.

5

Thank you for answering my doubts. This Github has been a great help to me.