Create Points on Surface

Hey guys I'm looking for a algorithm that creates points on a surface. They should be defined by the angle of the surface. Fewer points where it is flat and more points where the surface is bold. My goal is to create boxes in different sizes around that points and these boxes shouldn't intersect each other. The professor at my university showed me some reference projects named "Blockworks" from artist Antony Gormley. It would be ideal if the algorithm would also work for 3-dimensional objects like in the reference picture.