How to get part of the mesh's texture data?

[BangTao]

Hi,guys.i wanna know if there is a way can  get part of the mesh's texture data(and use these partial data to apply to another mesh):

Here:http://www.babylonjs-playground.com/#UVMN6

Line 17:is a ground with "earth.jpg" texture.

and Line24&39 are two triangles,these are part of the first one (with "earth.jpg" texture),and i wanna let these two meshs have the right texture from "the first"(at right range);

I know that i can set the UV's proportion to get the right output,but i don't wanna use it.

Thank you for your time!

[GameMonetize]

Hello you need to provide UV coordinates as well:

http://www.babylonjs-playground.com/#UVMN6#1

(and affect the same material)

[BangTao]

Okay,I think i can get the UV coordinates and get the right texture then.

but still a question:

Can BJS get a special point at texture and get it's color?Like: