Hello, I implemented a 2D triangulation fonction using Earcut. This isn’t the result I want because I want to triangulate 3D polygons (because rotations etc are computed somewhere else in the backend and I can’t access to a 2D polygon to triangulate it and then apply rotations with ThreeJS). I can…

[image] ads4: I can’t find how to make a 3D triangulation I’d try to do it in 3 steps, assuming the polygon is planar: rotate the polygon, so it is parallel to XY (i.e. Z=const) triangulate as 2D polygon rotate back to its original orientation

[image] PavelBoytchev: 3 steps, assuming the polygon is planar: This is what happens in the topic provided above. Not too elegant though :sweat_smile:

Thank you for your answers! I’m a beginner with 3d development and ThreeJS I have no idea how I can do this. I know that in the backend rotations are made using a pivot point. There is a big algorithm in the back for advanced calculations, and it provides me the polygon already positioned “so I ju…

[image] prisoner849: This is what happens in the topic provided above Excellent. This increases my chances to be correct.

https://threejs.org/examples/?q=tess#webgl_modifier_tessellation

3D triangulation

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prisoner849 April 22, 2024, 8:17am 2

Hi!
Maybe this topic will be helpful/useful: Texture on dynamically created object - #8 by prisoner849

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3D triangulation

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