consistant triangle frame surface

hello,

i try to generate a triangle surface and need some help

i made a sketch how i like it to do.

it will be great if it is possible to make it like in the sketch,

voronoi, square or with multible crossing lines...

I know how it can work but my grasshopper skills are not so good 

The strategie

1.  drew a closed 3d  curve and patch them. ( done )

3. from this surface i need a consistant triangle mesh

4. give the lines a thickness controllable with a slider

5. round points in the corner of each triangle side ( like in the sketch picture )

thanks