GF
In geometry, a (general) conical surface is an unlimited surface formed by joining all straight lines passing through a fixed point - a vertex or a vertex - and any point of some curve in a fixed space - a steering wheel - that does not contain a vertex. Each of these lines is called a generatrix. Described in polar variables as: x = a * cosA * cosB y = b * sinA * cosB z = c * cosB
