HTML 5 GameProcess & Optimization

Jason Arena, Keith McCullough, Matt Leffler

Every time I discuss HTML 5 with

developers I hear the same thing…

!

It’s not ready for Primetime.

A Few Games SpongeBob Gone Missing(Platformer)

!

Power Rangers

(Character animation)

!

Bloomix Battle

Dora Magic Land

!

Back Story Where we’ve beenWhy the transition to HTML 5?

Our clients • All browsers and devices

• Served into Webviews for Apps • Easy to update with new content

For Workinman

!

!

HTML5 Environments Engines we’ve Considered;

PlayN

Construct2 CreateJS

HAXE • NME (Now OpenFL)

• Flambé

A Few HTML 5 Engines

(for a good laugh)

!

Why Flambé• Easy transition from Flash

• Animation support

• Good performance

Also allows for lots of builds

• HTML 5

• iOS

• Android

• Flash (for IE 8 Desktops)

• Researching Steam

!

WM Environments AnimationFlump

Takes a Flash animation and creates a

tweened animation with an atlas file

!

SpriterA stand-alone animation tool

• Bones

• State blending

!

Design • Flash

• Photoshop

• Illustrator

!

WM Environments

Think FirstThere is no way for us to make graphics

for every device.

Screen Resolutions/Ratios • Design a modular UI (if possible)

• Scale graphics to screen size

• Bleed the rest for ratio. (Safe Area)

• Oversize art

• Responsive: Brain Crush Example

!

It’s easy to set up good keyboard input

first, but don’t forget touch!

!

Designing for both touch & keyboards

• We focus on making the game work with touch first and then add keyboard

!

Avoid soft buttons if possible • Especially for action games

• For some reason producers love them

Think First

No Silver Bullet

• A lot of small savings add up • Static image compression

• Strategic use of animation tools

!

Manage the loading experience • Show art fast! • Keep them Clicking!

Optimization

Load time Optimizations

Break down the loading process

1. Load Splash graphic

2. Load loader graphic

3. Load UI and game play graphics

4. Load level art on demand (5MB)

!

~ We try to keep initial loads under 1MB but sometimes it’s a judgment call.

Tips & Tricks

In extreme cases: • Load less content on specific devices

• Load smaller animations or backgrounds

• Create device specific asset bundles

!

!

Tips & Tricks

Loader Folder

Compress static assets as much as possible

PNGs Optimization • Posterization

• Dirty Transparency

• TinyPNG.org

• 8 Bit dithered PNG for hard edge assets

• Use 80% sized graphics. Scale them upUse compressed JPGs as Backgrounds

!

Tips & Tricks

Compress AnimationsFlump

Use for main characters

• Great for detailed Flash animations

• Typically smaller download

• Bigger memory footprint

– Show Power Rangers Characters

!

Tips & Tricks

Flump Atlas File Json FIle

Compress AnimationsPNG Sequences

Best for Enemies, Power Ups, & Particles

• Lower animation Framerate

• Typically larger download

• Smaller memory footprint

!

!

Tips & Tricks

Use tweens for animation

• Lowest memory and download

• Best for small items animating

• Simple rotation

• Scaling

!

Example: SB Gone Missing background characters

!

Tips & Tricks

General Performance: PoolingHuge performance hit when instantiating or

disposing elements.

Example:

• Create all particles before gameplay

• Store them in the pool array

• Only add to render list when needed

Tips & Tricks

Device Performance

• Branch to handle device exceptions

• Game may look a little different

!

Show Korra Example

Test on every device!

Tips & Tricks

Audio – different versions Mp3, OGG

!

Multi channel audio issues

• WebAudio support in iOS

• Android only supports <audio> tags

• 3rd party wrappers

!

!

Tips & Tricks

Wrappers Ludei: Cocoon JS

• Improved Audio support

• Improved performance?

• Better memory management Vs

Webview

• Consistent cross platform environment

A lil’ SomethingWM JS Embed Script• A JS library to embed games into HTML

• Handles Scaling

• APIs for game communication

• Inform Events:

• Game to HTML

• HTML to Game

!

https://github.com/workinKeith/JSEmbed

Thank You!Email with any questions

jason@workinman.com