Mastering Unity Scripting

Classes and polymorphism

To illustrate polymorphism in C#, let's start by considering the following code sample 1-12. This sample doesn't demonstrate polymorphism immediately but represents the start of a scenario where polymorphism will be useful, as we'll see. Here, a basic skeleton class is defined for a potential non-player character (NPC) in a generic RPG game. The class is intentionally not comprehensive and features basic variables that only mark the starting point for a character. The most important thing here is that the class features a SayGreeting function, which should be invoked when the player engages the NPC in conversation. It displays a generic welcome message to Console as follows:

01 using UnityEngine; 02 using System.Collections; ...