A scalar integer function to be used within the visual shader graph. Accept an integer scalar ([code]x[/code]) to the input port and transform it according to [member function]. A function to be applied to the scalar. See [enum Function] for options. Returns the absolute value of the parameter. Translates to [code]abs(x)[/code] in the Godot Shader Language. Negates the [code]x[/code] using [code]-(x)[/code]. Extracts the sign of the parameter. Translates to [code]sign(x)[/code] in the Godot Shader Language.