FPS_Tutorial_1.pdf

Creating a First Person Shooter (FPS)

Part 1

Author: Graham McAllister

Revised by: Jeff Aydelotte &

Amir Ebrahimi

Time to complete: 34 hours

Last Revision: 10July2009

Contents

1. Part   1:   Introduction

Prerequisites 

Starting a new project 

Setting up the game environment 

Adding the Main Character 

Adding a weapon 

Create the Missile object 

Missile explosions 

Sound effects 

Adding a GUI 

Physics 

Acknowledgments 

Part 1: Introduction

This tutorial will detail how 

to make a simple First 

Person Shooter (FPS). It will 

introduce fundamental 3D 

game programming 

concepts and give tips on 

how to think like a game 

programmer.

Prerequisites

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

concepts.

Starting a new project

Download 

FPS_Tutorial.zip, 

unzip, and open the 

project folder in 

Unity.

Import the Standard 

Assets Unity Pack

age from your 

Standard Packages 

folder where Unity 

is installed.

After importing, you will 

see Unity’s built in "Stan

dard Assets" in the Project 

Panel. When we create new assets, it’s best to put them in folders that group them 

according to their function, e.g. Rocket, Explosion, Audio , etc.

Setting up the game environment

Once the assets have been imported, you’ll notice there are many folders in the Pro

ject panel.

In the Projects panel, Select the mainLevelMesh from  Objects/mainLevelMesh/

mainLevelMesh .

In the Inspector panel, inside of the FBXImporter options you’ll find the "Gener

ate Colliders" option. Toggle that option on. If we don’t do this, the player will 

simply fall through the level (no collision).

Drag the mainLevelMesh into the scene.

There is no need to add a light to the scene, the level is already fully lightmapped. The 

imported level uses lightmaps for all lighting which allows us to use prebaked shad

ows. Lightmaps are very good for performance, especially if you want to create a 

complex lighting setup.

You’re now ready to add a character into the environment.

Adding the Main Character

We’re now going to add in a character for the player to control. Unity has a built in 

prefab specifically for a firstperson controller. This can be found in the Project panel 

under Standard Assets>Prefabs.

To add the First Person Controller, click on the arrow beside Standard Assets in 

the Project panel, as list of assets will appear. Find the folder called Prefabs and 

click on the arrow in the left hand side. You should now see the First person 

controller asset. Drag this into the Scene view.

You should see a cylinder object representing the player, 3 large arrows for al

tering the location in 3D space for the object (if you do not see 3 arrows then 

press the ‘W’ key), and a white mesh which shows the object’s viewport (where 

it is currently looking). The FPS Controller is now the default camera, by moving 

this object, you change the current view in the Game View. You’ll also notice 

that the FPS Controller has a camera icon on top of it. Move the character so 

that it is above ground level in the environment.

As we no longer have any need for the Main Camera, you can delete it.

Press Play, you should now be able to move around the level by using the mouse 

and keyboard (cursor keys to move or W,A,S,D).

You’ve now created a very simple FPS, let’s give the player a weapon.

Adding a weapon

We’re now going to give the player a grenade type object to throw in the environ

ment. To do this, you’ll need to create some Javascript to tell Unity about the behavior 

of the weapon.

So what do we want to do? We want to allow the player to shoot wherever the cam

era is pointing. However, let’s first think about our game character and their weapons. 

Our game character is seen through the first person view, with the camera positioned 

at eye level. If the player fires a weapons, the weapon should be launched from wher

ever their hands are, not from eye level. This means we have to add in a game object 

to represent the grenade launcher, and place it where the player’s hand would be 

when they hold this weapons. This ensures that the object fires from the correct 

location.

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