RedWire - Killer Engine for Remixing Games (at FOSDEM 2014)
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The document describes a new game engine called RedWire that is designed for remixing and mashing up games. It uses a visual programming approach with electronic components like chips, memory, and input/output. The engine runs entirely in the browser and aims to make it easy for developers and non-developers alike to take parts of one game and combine them with another to create new games. It handles issues like merging changes from different programmers and contains the game code in an isolated sandbox for security. The creator invites interested developers and designers to try it out and contribute new features.
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RedWire - Killer Engine for Remixing Games (at FOSDEM 2014)
- 1. Killer Engine for Remixing Games Jesse Himmelstein CRI-Paris
- 2. New game engine, with different goals Made for remixing games and mashups Electronics-inspired visual programming Excellent debugging and live coding tools All done in the browser
- 3. Interdisciplinary science and engineering Higher education School and after-school programs
- 5. Scientific and Educational Games Archimedes' Escape Leap Weizmann Institute
- 6. Citizen Science Games FoldIt Univ of Washington Fraxinus The Sainsbury Laboratory
- 7. A scientist should just be able to take part of one game, mix it with another one, and then modify it to make a new one That’s impossible MY BOSS ME Why?
- 8. We have: Functions Classes Metaclasses Blocks Entity Component Systems Unit tests End to end tests Distributed Version Control Virtual machines A million programming languages A billion game engines A kabillion libraries
- 9. What remixing should be
- 10. What refactoring is like
- 11. Interleaving -> incomprehension Lessons Avoid tangling Leave data alone Sane abstractions for state and time Rich Hickey "Simple made Easy"
- 12. Breadboard Connect anything Measure anywhere Replace everything
- 13. Been done before… Data flow flowhub
- 14. Unreal Kismet
- 15. Chip <pin> in Memory out <pin> <data> 1. Memory -> Chips <data> 2. Chips compute Chip <data> 3. Chips -> Memory <pin> constant <pin>
- 16. Memory <data> <data> <data> IO mouse keyboard graphics Chip <pin> 1. IO & Memory -> Chips <pin> 2. Chips compute 3. Chips -> IO & Memory
- 20. “What would have happened” “Mute” chips Find chips from memory or IO Test each chip in isolation Brett Victor ”Inventing on Principle”
- 22. User code is dangerous Contain within iframe with sandbox attribute Parent page - Editor Sandbox - Game exuecution Messages replace function calls iFrame sandbox="allow-scripts"
- 23. Two chips modifying the same array/object? Like version control 1. Create patches from a common ancestor 2. Merge patches Some merges are hard LCS (Longest Common Subsequence) Operational transforms
- 24. Track all past state Cloning data takes space! Full Patch Patch Better solutions Store mostly patches Patch Full Patch
- 25. Persistant data structures Applies to lists, trees, hash maps, etc. List A [1, 2, 3, 4] 1 List B [5, 2, 3, 4] 5 2 3 4
- 26. Treat IO as a buffer instead of a set of methods Input Mouse (getMousePos() -> mouse.position) Keyboard (isKeyDown() -> keyboard.keysDown) Output Canvas ctx.fillStyle = ”black”; ctx.fillRect(0, 0, 100, 100); canvas.shapes = [{ fillStyle: “black”, position: [0, 0], size: [100, 100] }];
- 27. Input/Output HTML using Rivets.js ▪ Template + values ▪ 2-way data binding HTTP ▪ Data replaces events and callbacks!
- 29. Looking for new and different games Developers and designers always welcome! Lots of new features to work on
- 30. Paris Game Club - Making, playing, learning Invited speakers Micro-game jams Videos + agenda at gamelier.org
Editor's Notes
- TODO: changepicture of server baywithsomethingwithcrazierwires (star wars?)Only possible if youspenddays, weeks of delicatesurgery to separatetwothings, and longer to plugthem back together in a differentway
- TODO: changepicture of server baywithsomethingwithcrazierwires (star wars?)Only possible if youspenddays, weeks of delicatesurgery to separatetwothings, and longer to plugthem back together in a differentway
- Inspiration came from excellent presentations by RichHickeyObserved how when parts of a system are interleaved, throughfunction calls or context or state, itisbecomestoocomplex to understand all the possible interactionsIf a programmer can’treason about a program, hecan’t change it for the betterThat’swhywespendsomuch time refactoring, just to have a system thatissane, thatwecanunderstand and reason about.Defined notion of simplicity, an objective, absolutemeasurement on how interleaved a program’s parts areGave some insights intowhatmakessystems « simple ». If youwant more information, pleaseseehis talk « Simple Made Easy » as well as others by him.
- Legos are a simple, but not dynamic. What about electronics as a metaphor?You canconnectany part to anyother one.You can stick a multi-meter or oscilloscope atany point in the circuit to understandwhat’sgoing on. You caneven place several of themat onceYou can pull out anypiece and replace itwithanother. The i »nterface » isjust a pin and a wire.
- Not the first to beinspired by electronics.Dat aflow has existedsince the earlydays of computing. The ideais to have a graph of nodes, thatperformoperations on their inputs, and sendtheir outputs onto othernodesfurther down the draph. It was first a computer architecureidea, considered on equal footing with the Van Neumann architecture thateventuallydominated. Onlylaterdidresearchersrelializethat the visual aspects weresocompelling. You cansee data actually move down the graph.This worksverywell for small graphs.
- But asyouaddlogic, thingsget more « complex ».Whenanynodecansend data to anyothernode, youget chaos.Each of thesenodes has itsown state, changing all the time.Visual spaghetti isstill spaghetti!Visual spaghetti isstill spaghetti
- Differencesfrommostprogrammingenvironments: Reading to memoryis happening simultanously - no race condiitions. Chips are executingconcurrently, can’teffectother. Chips are not directlylinked.Writing to memoryisalsodone in parallel – detectconflicts, mergeresults.ConnectanythingMeasureanywhereReplace everything
- Start with single chip thatwrites to ioThen have itwritesomethingbased on memory to ioThen have a different chip modifythatmemoryYou can examine either one in isolationHavingtwo chips writing to the same place is an errorHave itwrite in and out to memoryPut a second thatcoordinateswithitNowyoucan swap one out and put anotherit. Or take out the memoryalltogether
- Start with single chip thatwrites to ioThen have itwritesomethingbased on memory to ioThen have a different chip modifythatmemoryYou can examine either one in isolationHavingtwo chips writing to the same place is an errorHave itwrite in and out to memoryPut a second thatcoordinateswithitNowyoucan swap one out and put anotherit. Or take out the memoryalltogether
- Start with single chip thatwrites to ioThen have itwritesomethingbased on memory to ioThen have a different chip modifythatmemoryYou can examine either one in isolationHavingtwo chips writing to the same place is an errorHave itwrite in and out to memoryPut a second thatcoordinateswithitNowyoucan swap one out and put anotherit. Or take out the memoryalltogether
- By default, an iframecan « reach out » and alter the parent pageSiteslikejsfiddle or plunkr have to deal withthis.Solution: get the browser to enact a securitypolicy. Use a differentdomain or the new HTML5 « iframesandbox ».
- Like version control, creates patches from a commonancestor, and thenmergesthemSomemerges, such as onarrays, are difficult to do in a naiveway.Will move to libraryusing LCS Longest Common SubsequenceProblemalgorithm (JSONDiffPatchlibrary)
- Treating IO as a buffer (memory) instead of as a set of functionsFor input only, worksgreat (mouse, keyboard)Works well for APIs thatalways do new things (canvas)Can alsowork for persistant APIs, like HTMLHarder for APIs that do feedback
- Treating IO as a buffer (memory) instead of as a set of functionsFor input only, worksgreat (mouse, keyboard)Works well for APIs thatalways do new things (canvas)Can alsowork for persistant APIs, like HTMLHarder for APIs that do feedback
- Game platformonly as good as the games on it!Wewe help youbringyourgames over to the platform.Live tests in Paris. MicroGame