Polysurface filled with truss

Dear GH masters,

This is what I just did to fill a polysurface with truss;which is stupid

Made a big block with many trusses, overlap it with the polysurface. split the truss block with the polysurface, and hide all the lines outside polysurface. to make the 3D print part lighter. Can anyone suggest a smarter way to do this with Grasshopper?

I have tried several thread like bone structure , but I am stucked.

Thanks for any advice! and have a nice weekend!