How can i create 3D polygons from x,y,z coordinates ? 2D to 3D

[sphynx]

im trying to do an alternatively world map and, i need to process a data from real world geojson datas.
and i did it, i processed the data and i know where the polygons should located which i show them spheres.
know the problem starting…
i have the necessary coords but i dont know how can i pull the data and create an array and using the indexes which are 5 (last one and first one are the same).
with the indexes i draw an 3D object and i think the object looks like boxes.
can someone help me with the example codes?

[Attila_Schroeder]

Hi sphynx,

That reminds me of this topic. Someone recently asked something similar and I made a code pen for it.
Take a look, maybe it goes in the direction you imagine.

Can't understand why result is a triangle instead of rectangle when creating 3d polygon

I am relatively new to Three.JS and tried to implement something to build polygons in 3D space. I tried using earcut library to triangulate points - did not help that much, tried to use Hull.js, which did work, but only with convex shapes. After a while I found solution that was provided by @prisoner849 and for some sets of points it worked perfectly, but for some not. Live code example As far as I understand this solution, there should be a rectangle here, not a triangle. For this set of po…

[sphynx]

Thank you its worked !!