A signed distance function (SDF) is a mathematical function that describes the distance between a point in space and a fixed reference point or surface. The distance is signed, meaning it can be positive (outside the reference surface), zero (on the reference surface), or negative (inside the reference surface). SDFs are commonly used in computer graphics and robotics for collision detection, object representation, and path planning. They can also define complex shapes and perform Boolean operations on them. One of the most common algorithms to compute the SDF is known as the "Fast Marching Method."

Genuary 2023: Signed distance function