Hello, I'm a junior engineer, and I'm facing a physics/maths problem, for my new project. I dont know all the technologies at the moment, and don't know all the tools available. I would like to calculate/get the closest Metal object from an other object (called x). x could store a sensor or a microcontroller to proceed in the calculation, but what do i need, to get the distance(dont need the distance in cm or m but more the closest object).What will be the easiest method to use? Ulstrasound? the laser meter is not an option as I'm in a 3D environment. Hope I was clear in my explanation you help will be greatfull.