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Flash Online Conference #7
Scripting 3D apps with Lua and C++
@Minko3D http://minko.io
LATEST MINKO 2 ADDITIONS Available today on minko.io
New Minko 2 Features
Editor – Auto-save – Multiple optimizations
Framework
– Mutiple fixes on the lighting system
Available today! http://minko.io/download
MINKO 3 Codename « Normandie »
Motivations
Target new platforms – Keep the « design once, deploy everywhere » workflow – Larger community
Increase performances, epecially CPU-wise
– Multi-threading?
Leverage existing codebase
Technological choices
C++11 core framework and plugins
Develop once, deploy everywhere – Windows, Mac, Linux – Android, iOS – HTML5, Flash
Work with all the tools you like
Babolat Play - First commercial project!
http://www.youtube.com/watch?v=ewUUerxdZ7U
Babolat Play - Fallback
Is WebGL
available?
Run web app. Generate JPEG on the server
no yes
Thanks to Minko 3, the same code runs on the server side and in the browser.
New Platforms
Platform Status Target Languages
iOS OK Native C/C++
Android OK Native C/C++
Flash (Stage3D) WIP X-Compilation C/C++, AS3
Windows (DirectX) OK Native C/C++
Mac OK Native C/C++
Windows (OpenGL) OK Native C/C++
Linux OK Native C/C++
HTML5 (WebGL) OK X-Compilation C/C++, Javascript
Windows Phone WIP Native C/C++
BlackBerry 10 NA Native C/C++
Firefox OS NA Native C/C++
How can I help?
Show your love for Crossbridge and Minko on the dedicated feature request on Github! – https://github.com/adobe-flash/crossbridge/issues/28
Please leave a comment, even just a +1
2D/3D file formats
50+ 3D file formats – 3DS, BLEND (Blender 3D), DAE/Collada, FBX, IFC-STEP , ASE, DXF,
HMP, MD2, MD3 , MD5, MDC, MDL, NFF, PLY, STL, X, OBJ, SMD, LWO, LXO, LWS, TER, AC3D , MS3D , COB, Q3BSP, XGL, CSM, BVH, B3D, NDO, Ogre XML, Q3D
20+ 2D file formats
– JPEG, PNG, TIF, TGA, RAW, PSD…
Effect files
Store a fully setup multi-pass rendering effect
Include 3rd party shaders and plug them in the engine using bindings
Support über-shaders using automated macro definition based on bindings
Handle multiple rendering techniques to choose from at runtime
Can fallback to another specific technique when the selected one fails (WIP)
Portable Effects & Shaders
Group passes in a named « technique »
Select that technique at runtime based on some flags – Platform – Available features/plugins – Custom flags
"techniques" : [ { "configuration" : [ "windows" ], "passes" : [ { "vertexShader" : … "fragmentShader" : … } }, { "configuration" : [ "flash" ], "passes" : [ { "vertexShader" : … "fragmentShader" : … }, { "vertexShader" : … "fragmentShader" : … } } ]
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Leap Motion support
http://www.youtube.com/watch?v=p14kJNJ9Eoc
Oculus Rift support
SCRIPTING IN MINKO 3
C++11 is great, but…
Is a new language for most developers
It’s too complex for prototyping game design
Requires some setup to get started
Slow iteration times
Core Framework Language Fast
Rich & expressive
Optimized for each target
Scripting Language Simple
Interpreted
Dynamic
VS C, C++, Java, C#... Javascript, Python, AS3…
Complaints about ActionScript
Garbage collector is messy
No operators overloading
Bad performances
No (easy) concurrency
We chose… Lua!
Fits all the requirements of a scripting language
Vastly used by the video game industry (World of Warcraft, Fable II & III, Neverwinter Nights, …) – Complete list of games scripted with Lua
Very (very) fast
– LuaJIT is comparable to Javascript V8, if not faster
Designed to be embedded
Designed to script games – Simple but very efficient syntax – Minimalistic set of features but very extensible – Coroutines!
C++ Lua? LuaGlue!
C++/Lua bindings
Open source project – https://github.com/Tomasu/LuaGlue – We contribute as much as possible
Leverage C++11
– Optimize as compile time as much as possible – Simple binding interface
Used to bind 90% of Minko’s C++ API
– Write 100% of your app in Lua
ActionScript VS Lua
ActionScript Messy garbage
collector
No operators overloading
Bad performances
No easy concurrency
Lua Customizable garbage
collector
Operators overloading
Very fast + custom C/C++ bindings
Coroutines
Minko 3 VS Flash
Flash Runtime
Core Library
ActionScript VM
Application
OS
Minko 3
Core Framework & Plugins
Lua VM
Application
OS
ANE
Flexible
Flash Runtime
Core Library
ActionScript VM
Application
OS
ANE
Minko 3
Core Framework & Plugins
Lua VM
Application
OS
Open Source
Flash Runtime
Core Library
ActionScript VM
Application
OS
Minko 3
Core Framework & Plugins
Lua VM
Application
OS
ANE
Customizable
Flash Runtime
Core Library
ActionScript VM
Application
OS
Minko 3
Core Framework & Plugins
Lua VM
Application
OS
ANE
Coroutines
A function can suspend its execution… – coroutine.yield()
… and then resume « sometime later »
– coroutine.resume()
Gives the illusion of parallelism – Yet no complicated threading stuff – Fully cross-platform
Allow the creation of non-blocking (heavy) functions
Can (always?) be used in place of events/callbacks
Coroutines
function myScript doSomething() while isIdle say(‘hello how are you?’) wait(seconds(3)) while no isIdle wait(keyboard:keyDown()) handleKeyboard() …
Event driven Coroutine driven
Action => reaction
Breaks the code in multiple handlers
Messy execution flow
Messy scopes
Wait for « something » to happen
Non-blocking
Simple execution flow
Meaningful and readable
You chose!
C++ – Performances – Rich and powerful language
Lua
– Simple and efficient – Fast iteration times
Mix both in any project on any target
2014
New Minko editor – Script editor – Live coding – ShaderLab – Animations editor – Plugins system
Open beta of Minko 3 (January)
An amazing new Minko product for businesses and teams
http://www.youtube.com/watch?v=yuR1e1PjU8Y
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