An implicit function defined by an expression.
This component can only be used in the MeshImplicit.Function property.
See also: MeshImplicit
An expression that is called when the implicit surface polygonizer is sampling the surface. The special read-only properties "X","Y" and "Z" holds the current coordinates. Return a value representing the distance to the surface. Example of a valid expression that defines a sphere: "return (X*X) + (Y*Y) + (Z*Z) - 1;"