Calculates a Step function within the visual shader graph. Translates to [code]step(edge, x)[/code] in the shader language. Returns [code]0.0[/code] if [code]x[/code] is smaller than [code]edge[/code] and [code]1.0[/code] otherwise. A type of operands and returned value. A scalar type. A vector type. A vector type. [code]edge[/code] port is using a scalar type. Represents the size of the [enum OpType] enum.