Calculates a derivative within the visual shader graph. This node is only available in [code]Fragment[/code] and [code]Light[/code] visual shaders. A derivative function type. See [enum Function] for options. A type of operands and returned value. See [enum OpType] for options. A floating-point scalar. A 2D vector type. A 3D vector type. Represents the size of the [enum OpType] enum. Sum of absolute derivative in [code]x[/code] and [code]y[/code]. Derivative in [code]x[/code] using local differencing. Derivative in [code]y[/code] using local differencing. Represents the size of the [enum Function] enum.