Unity 4.x Game Development by Example电子书

Unity 4.x Game Development by Example Beginner's Guide

Table of Contents

Unity 4.x Game Development by Example Beginner's Guide

Credits

About the Author

About the Reviewers

www.PacktPub.com

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Free Access for Packt account holders

Preface

A word about the third edition

Your future as a game developer

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the color images of this book

Downloading the example code

Errata

Piracy

Questions

1. That's One Fancy Hammer!

Introducing Unity 3D

The engine, the tool, and the all-weather tires

Unity takes over the world

Why choose Unity?

Why burn this book and run away screaming?

Browser-based 3D – welcome to the future

Time for action – install the Unity Web Player

Welcome to Unity 3D!

What can I build with Unity?

FusionFall

Completely hammered

Should we try to build FusionFall?

Another option

Off-Road Velociraptor Safari

Fewer features, more promises

Maybe we should build Off-Road Velociraptor Safari?

I bent my Wooglie

Big Fun Racing

Diceworks

Lovers in a Dangerous Spacetime

Showcase Showdown

Unity Technologies – "Made with Unity" page

Kongregate

The iOS App Store

Walk before you can run (or double jump)

There's no such thing as "finished"

Stop! Hammer time

Fight Some Angry Bots

The wonders of technology!

The Scene window

The Game window

The Hierarchy panel

The Project panel

The Inspector panel

Heads Up?

Layers and layout dropdowns

Playback controls

Scene controls

Don't stop there – live a little!

Summary

Big ambition, tiny games

2. Let's Start with the Sky

That little lightbulb

The siren song of 3D

Features versus content

A game with no features

Mechanic versus skin

Trapped in your own skin

That singular piece of joy

One percent inspiration

Motherload

Possible additional features:

Heads up!

Artillery Live!

The skinny on multiplayer

Bang for your buck

Pong

The mechanic that launched a thousand games

Have a go hero – redesign your favorite games

Toy or story

Pop Quiz – finding that singular piece of joy

Redefining the sky

Summary

Let's begin

3. Game #1 – Ticker Taker

Kick up a new Unity project

Where did everything go?

'Tis volley

Keep the dream alive

Slash and burn!

The many faces of keep-up

Creating the ball and the hitter

Time for action – create the Ball

What just happened – that's all there is to it?

A ball by any other name

Time for action – rename the Ball

Origin story

XYZ/RGB

Time for action – move the Ball Into the "Sky"

Time for action – shrink the Ball

Time for action – save your scene

Time for action – add the Paddle

What's a Mesh?

Poly wants to crack your game performance?

Keeping yourself in the dark

Time for action – add a light

Time for action – move and rotate the light

Have a go hero

Extra credit

Are you a luminary?

Who turned out the lights?

Darkness reigns

Cameramania

Time for action – test your game

Let's get physical

Add physics to your game

Understanding the gravity of the situation

More bounce to the ounce

Time for action – make the Ball bouncy

Have a go hero

Summary

Following the script

4. Code Comfort

What is code?

Time for action – write your first Unity Script

A leap of faith

Lick it and stick it

Disappear me!

What just happened?

It's all Greek to me

You'll never go hungry again

With great sandwich comes great responsibility

Examining the code

Time for action – find the Mesh Renderer component

Time for action – make the ball re-appear

Ding!

Time for action – journey to the Unity Script Reference

The Renderer class

Have a go hero – pulling the wings off of flies

What's another word for "huh"?

It's been fun

Time for action – unstick the Script

Gone, but not forgotten

Why code?

Equip your baby bird

Time for action – create a new MouseFollow Script

What just happened?

A capital idea

Animating with code

Time for action – animate the Paddle

What just happened – what witchcraft is this?

Why didn't the Paddle animate before?

Pick a word – (almost) any word

Screen coordinates versus World coordinates

Move the Paddle

Worst. Game. Ever.

See the matrix

Time for action – listen to the paddle

A tiny bit o' math

Tracking the numbers

Futzing with the numbers

Time for action – Log the New Number

She's a-work!

Somebody get me a bucket

Time for action – declare a variable to store the Screen midpoint

What just happened – we've gone too var

Using all three dees

Time for action – follow the y position of the mouse

A keep-up game for robots

Once more into the breach

Time for action – re-visit the Unity Language Reference

Our work here is done

Time for action – add the sample code to your Script

One final tweak

What's a quaternion?

Wait, what's a quaternion?

WHAT THE HECK IS A QUATERNION??

Educated guesses

More on Slerp

Right on target

Have a go hero – time to break stuff

Keep it up

Beyond the game mechanic

C# Addendum

5. Game #2 – Robot Repair

You'll totally flip

A blank slate

You're making a scene

Time for action – set up two scenes

No right answer

Time for action – prepare the GUI

The beat of your own drum

Time for action – create and link a custom GUI skin

What just happened?

Time for action – create a button UI control

What just happened?

Have a go hero – no sense sitting around on your button

Want font?

Cover your assets

Time for action – nix the mip-mapping

Front and center

Time for action – center the button

What just happened – investigating the code

The waiting game

The easiest button to button

To the game!

Time for action – add both scenes to Build List

Set the stage for robots

Time for action – prepare the game scene

The game plan

Have some class!

Time for action – store the essentials

A matter of great import

Building a better bucket

How big is your locker?

Start me up

Going loopy

The anatomy of a loop

To nest is best

Seeing is believing

Time for action – create an area to store the grid

Have a go hero – don't take my word for it!

Build that grid

What just happened – grokking the code

Now you're playing with power!

C# addendum

6. Game #2 – Robot Repair Part 2

From zero to game in one chapter

Finding your center

Time for action – centering the game grid vertically

What just happened?

Time for action – centering the game grid horizontally

What just happened – coding like a ninja

Down to the nitty griddy

Do the random card shuffle

Time for action – preparing to build the deck

Let's break some robots

Time for action – building the deck

What just happened – dissecting the bits

Time for action – modifying the img argument

What just happened?

What exactly is "this"?

Have a go hero – grokketh-thou Random.Range()?

Random reigns supreme

Second dragon down

Time to totally flip

Time for action – making the cards two-sided

Time for action – building the card-flipping function

Time for action – building the card-flipping function

What just happened – dissecting the flip

Pumpkin eater

What just happened?

Stabby McDragonpoker rides again

Game and match

Time for action – ID the cards

What just happened?

Time for action – comparing the IDs

What just happened?

On to the final boss

Endgame

Time for action – checking for victory

What just happened?

Have a go hero – extra credit

Endgame

Bring. It. On.

C# Addendum

7. Don't Be a Clock Blocker

Apply pressure

Time for action – preparing the Clock Script

Time for more action – preparing the clock text

Still time for action – changing the clock text color

Time for action rides again – creating Font Texture and Material

Time for action – what's with the tiny font?

What just happened – was that seriously magic?

Time for action – preparing the clock code

What just happened – that's a whole lotta nothing

Time for action – creating the countdown logic

Time for action – displaying the time on-screen

What just happened – what about that terrifying code?

Picture it

Time for action – grabbing the picture clock graphics

What just happened – you can do that?

Time for action – Flex those GUI muscles

What just happened – how does it work?

The incredible shrinking clock

Keep your fork – there's pie!

Pop quiz – how do we build it?

How they did it

Time for action – rigging up the textures

Time for action – writing the pie chart script

What just happened?

Time for action – commencing operation pie clock

What just happened – explaining away the loose ends

Time for action – positioning and scaling the clock

Have a go hero – rock out with your clock out

Unfinished business

C# Addendum

8. Hearty Har Har

Welcome to Snoozeville

Model behavior

Time for action – exploring the models

Time for action – hands up!

What just happened – size matters

Time for action – changing the FBX import scale settings

Time for action – making the mesh colliders convex

Time for action – making the hands and tray follow the mouse

What just happened – monkey see, monkey do

Time for action – getting your heart on

Time for action – ditching the Ball and Paddle

What just happened – bypass the aorta

Time for action – material witness

What just happened – understanding Materials

Have a go hero – adding materials to the other models

This just in – this game blows

Time for action – multiple erections

Time for action – creating a font texture

Time for action – create the HeartBounce script

What just happened – charting a collision course

Time for action – tagging the tray

Time for action – tweaking the bounce

What just happened – storing velocity

Time for action – keeping track of the bounces

Time for action – adding the lose condition

What just happened – understanding the code

Time for action – adding the Play Again button

What just happened?

Ticker taken

C# Addendum

9. Game #3 – The Break-Up

Time for action – bombs away!

Time for action – poke those particles

Time for action – creating a spark material

Have a go hero – time to ignite your creative spark

Time for action – prefabulous

What just happened – what's a Prefab?

Time for action – lights, camera, and apartment

Time for action – adding the character

Time for action – registering the animations

Time for action – scripting the character

What just happened – stepping through the "step" code

Time for action – open the pod bay door, Hal

Time for action – collision-enable the character

Time for action – apocalypse now?

Time for action – go boom

Time for action – kill kill murder die

Time for action – the point of impact

Time for action – hook up the explosion

Summary

C# addendum

10. Game #3 – The Break-Up Part 2

Time for action – amass some glass

Time for action – create a particle system

What just happened – getting smashed

Time for action – make it edgier!

What just happened – I fall to pieces

Time for action – contain the explosion

What just happened – duped?

Time for action – let's get lazy

What just happened – FallingObject: The PuppetMaster

Very variable?

Terminal velocity is a myth – bombs fall faster

What just happened – when game objects collide?

Time for action – tag the objects

Time for action – write the collision detection code

Time for action – animation interrupts

What just happened – the impenetrable stare

Time for action – add facial explosions

What just happened – raindrops keep 'sploding on my head

Time for action – make some noise

Time for action – add sounds to FallingObject

Silent 'Splosion

What's the catch?

Have a go hero – sound off

Time for action – mix it up a bit

Have a go hero – filling in the gaps

Summary

C# Addendum

11. Game #4 – Shoot the Moon

Time for action – duplicate your game project

Time for action – space the shooter up a bit

Time for action – enter the hero

Time for action – it's a hit!

Time for action – bring on the bad guys

Time for action – do some housekeeping

Time for action – fixing the fall

Time for action – tweak the hero

What just happened – hooray for lazy!

Time for action – give up the func

Time for action – itchy trigger finger

Time for action – futurize the bullet

Time for action – building Halo

Time for action – fire!

Time for action – code do-si-do

What just happened – eat lead

Time for action – the maaagic of aaaarguments

Time for action – add the most important part of any space shooter

Last year's model

Have a go hero – filling in the empty space

Summary

C# Addendum

12. Game #5 – Kisses 'n' Hugs

Computers that think

Time for action – haul in the hallway

Time for action – hash it out

One Script to rule them all

Time for action – it's hip to be square

What just happened – find and click

Squaring the Square

Time for action – now you see it...

Family values

Time for action – X marks the spot

Time for action – boy O boy

Time for action – bottoming out

Here comes the drop

What just happened – to collide or not to collide?

Time for action – +9 accuracy

Time for action – solve for X

What just happened – lockdown

Time for action – it takes two to Tic Tac Toe

What just happened – alternating between players

Time for action – designer to player. Come in, player.

What just happened – prompt service

Slowly building to a climax

Have a go hero – think it through

Read after thinking

What just happened – building a more complex lock

On deaf ears

Time for action – pretty maids all in a row

What just happened – order!

Winner is coming

Codesplosion

Need-to-know basis

Need-to-know basis

Clean-up on aisle code

What just happened – vending machine

Shave and a haircut

What just happened – hunting for a win

Time for action – check for a win

Sore loser

Time for action – notify the winner

Time for action – you win. Now what?

Have a go hero – draw, pardner

Nice moves

Time for action – the final bug

All done but for the shouting

C# addendum

13. AI Programming and World Domination

Take it away, computer

Time for action – add computer control

Herpa derp derp

What just happened – making a list, checking it twice

Unpacking the code

Time for action – code consolidation

Tic Tac Toe at the speed of light

Sore loser

Click-spamming for fun and profit

Artificial stupidity

Have a go hero – solve Tic Tac Toe

Time for action – winning is everything

It's a trap!

The leftovers

Time for action – pseu pseu pseudocode

What just happened – stepping through the strategy

Time for action – begin at the end

Time for action – the final four

Code one, get one free

Have a go hero - stump the author

The actual intelligence behind artificial intelligence

Time for action – score!

What just happened – the search is on

Shut your trap

Detecting the tri-corner trap

Time for action – to catch a competitor

What just happened – I'm running out of trap puns

Perfection Horrible, horrible perfection.

Time for action – programming fallibility

What just happened – roll for initiative

Turning it up to "Smart"

Code encore

Summary

More hospitality

C# addendum

14. Action!

Open heart surgery

Time for action – haul in the hallway

Time for action – meet me at camera two

Time for action – adjust Main Camera

Time for action – deck the halls

Time for action – turn on the lights

Time for action – set up the camera rig

Time for action – animate the bouncer

What just happened – red and raging

Time for action – I like to move it move it

Have a go hero – bounce your brains out

Time for action – animate the runner

What just happened – holy hospital rampage, Batman!

Time for action – how to "handle" Nurse Slipperfoot

Time for action – you spin me right round

Have a go hero – give Robo-Nurse a soul

Have a go hero – use your new-found powers for good

Time for action – deploy your game

Time to grow

Beyond the book

A. Appendix

Online resources

Offline resources

Free development tools

Graphics

Sound

The Unity Asset Store

Game portals

Index