Best way for generate planete

[Uther]

Hello, isearch many time solution for generate planete in panda3d
i found first solution in this

Cut terrain to circle?

Hello i have question with panda3d, can i cut terrain ? by default when I load a terrain it has the shape of a square, can i cut this terrain for generate circle ? i want use this heightmap : [heightfield] with 2 terrain for generate planete, but i have square, i want to “transform” square to circle [sphere] my python code, besed of panda3d sample #!/usr/bin/env python from direct.showbase.ShowBase import ShowBase from panda3d.core import ShaderTerrainMesh, Shader, load_prc_file_data f…

but i have 2 problems with this solution :

1. the center of planete have not circle form
2. i load only 2 terrain for generate planet, it’s too little if i want to generate very big planet i must load 50 little terrain, not 2 bigger terrain

I can’t develop the latest solution proposed by rdb based on a mercator system
But i think i found other solution, i can generate many triangle for generate sphere like this

1. What do you think of this solution? would you have done better?
2. If no, I’m looking for a mathematical formula that would allow me to position my triangle (x,y,z) and rotation to form a sphere
   positioning them manually does not seem to me a good solution