FPS_Tutorial_2.pdf

Creating a First Person Shooter (FPS)

Part 2

Author: Graham McAllister

Revised by: Jeff Aydelotte &

Amir Ebrahimi

Time to complete: 34 hours

Last Revision: 10July2009

Contents

1. Part   2:   Enhancements

Prerequisites 

Before we begin  level setup 

Weapon switching 

Rocket Launcher 

Hit Points 

Sentry Gun 

Skybox 

Acknowledgments 

Part 2: Enhancements

This intermediatelevel 

tutorial extends upon the 

Basic FPS tutorial by 

introducing game elements 

such as multiple weapons, 

damage and enemies.

Prerequisites

This tutorial assumes that you are familiar with the Unity interface and basic scripting 

concepts. Additionally, you should already be familiar with the concepts discussed in 

Part 1 of the FPS tutorial series.

Before we begin  level setup

Download FPS_Tutorial.zip, unzip, and open the project folder in Unity. If you 

have completed Part 1, then unzip the files to a new folder.

Import the Standard Assets Unity Package.

Add the  mainLevelMesh  and FPS controller prefab to the scene.

NOTE   In this tutorial no new scripts need to created. We’ll be using the ones that 

were downloaded from the Unity Package.

Weapon switching

Before we discuss how to create each individual weapon, we need to write some code 

to manage how the weapons are initialized and switched from one to another.  Let’s 

look at the Javascript for  PlayerWeapons.js :

function Awake()

{

// Select the first weapon

SelectWeapon(0);

}

This function initializes weapon 0 as the default weapon.

function Update()

{

// Did the user press fire?

if (Input.GetButton ("Fire1"))

BroadcastMessage("Fire");

if (Input.GetKeyDown("1"))

{

SelectWeapon(0);

}

else if (Input.GetKeyDown("2"))

{

SelectWeapon(1);

}

This function detects keyboard input; the ﬁre button, the “1” button for weapon 1 or 

the “2” button for weapon 2.  The weapons will be children objects of the Main Cam

era.

function SelectWeapon(index : int)

{

for (var i=0;i<transform.childCount;i++)

{

// Activate the selected weapon

if (i == index)

transform.GetChild(i).gameObject.SetActiveRecursively(true);

// Deactivate all other weapons

else

transform.GetChild(i).gameObject.SetActiveRecursively(false);

}

This activates the corresponding weapon depending on keyboard input.

Let’s use the above code.

Create an empty game object called Weapons.  Move this so that it is a child ob

ject to Main Camera (inside FPS controller).  Our weapons will be added as chil

dren of this object.

Assign the  PlayerWeapons.js  script to the Weapons game object under Main 

Camera.

We’ll now create our first weapon.

Rocket Launcher

This section will describe how to make a rocket launcher style weapon.

Launcher

The rocket launcher is responsible for instantiating a rocket and giving it an initial ve

locity. The rocket will be launched directly at wherever the user is pointing and will be 

destroyed whenever it collides with another collider.

Add an empty game object and name it RocketLauncher.  Position the game ob

ject in the approximate position where the FPS Controller’s hands would be.

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika: