2DGameplayTutorial.pdf

2D Gameplay Tutorial 

Providing 2D Gameplay with Unity 2

Author: Graveck Interactive

Last Revision: 19FEB2008

Contents

1. Introduction

Why 2D is the Bee's Knees 

Prerequisites 

2. Setting   The   Scene

Getting in the 2D MindSet 

A Closer Look 

Setting the Level Attributes 

Object Profile: Level Attributes 

Object Profile: Death Zone 

Setting Up the Platforms 

Object Profile: Platform (Prefabs) 

Object Profile:  PreAssembled Platform 

Introducing Lerpz, Our Lovely Character 

Placing Lerpz 

Directing the Camera 

Object Profile: Character (Lerpz) 

Lighting our Scene 

Spicing up the Character 

The Camera 

Object Profile: Main Camera 

Continuing our Level 

Script Profile:  CameraTargetAttributes 

Handling Rigidbodies 

Object Profile: Crate 

Exercise 

Moving Platforms 

Object Profile: Moving Platform 

The Spaceship 

Object Profile: Spaceship 

Well Done! 

3. Delving   Deeper:   Scripting   Examples

Studying the Scripts 

Moving Platform Particle Effects 

The Camera Scrolling Script 

Streamline Your Workflow 

Spaceship Script Part 1: Defining Helper Classes 

Spaceship Script Part 2: Controlling the Spaceship 

Spaceship Script Part 3: Special Effects 

Finished! 

4. What's   Next?

Your Turn 

Introduction

Sometimes 2D gameplay 

calls and you can't resist its 

alluring charm! Unity can 

handle it. 

This tutorial shows the 

steps you need to create a 

basic 2Dstyle platform 

game.

Why 2D is the Bee's Knees

It is no secret that Unity can help you create great threedimensional games with ease. 

Its raw power and flexibility allows even beginners to create impressive games with

out much difficulty. Unity is undoubtedly a great 3D game engine  so why on earth 

would you want to create a 2D game with it?

For certain game types, that extra "D" in 3D can be a hindrance. Some games simply 

work better with twodimensional gameplay mechanics. Think of those simple and fun 

2D sidescrolling games you have played in the past, or maybe you have a simple puz

zle game idea that would work best constrained to two dimensions  the list keeps 

going but the bottom line is many games can benefit by the use of only two dimen

sions. 

Twodimensional games are also commonly easier for the casual gamer to understand, 

which is something to consider if you're a small game developer (see the article "Cas

ual Games as a Business").

Luckily, Unity is extremely flexible and can easily handle 2D gameplay! Its world class 

Ageia PhysX is highly adaptable and can be constrained in many ways including two 

dimensions. 

In this tutorial we define a 2D Game as a game where graphics are still in 3D, but re

stricted motion causes the physics and gameplay only to occur in a single 2D plane. 

This lets us use 3D models for our content and makes life easier for artists and devel

opers alike. One could say that we're using the best of both worlds: the ease of 2D 

gameplay and the beauty of 3D graphics  with the added attraction that existing de

velopers already have a good 3D asset production pipeline in place. 

This tutorial will guide you in building a 2D platform game. We have designed this 

tutorial with beginner / intermediatelevel users in mind; we only ask that you have a 

baseline knowledge of Unity. We have also included some advanced concepts that 

may be of interest to more seasoned users. 

We begin by getting you into the 2D mindset. Then we will walk you through build

ing a 2D world in which your character will move around. After adding a few cool ob

stacles and scenery, we'll lastly add a rocket ship for the player to fly. 

We hope you enjoy this tutorial as much as we had fun creating it!

The tutorial’s demo level in action.

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