Burn: 8-Bit Game Development With Ruby

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#VSO#JU(BNF %FWFMPQNFOU 8JUI3VCZ !SFNPSF 4FQUI 3VCZ,BJHJBU'VOBCPSJ +BQBO

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self.introduction do greetings "Hi" id "remore" name "Kei Sawada" icon from "Tokyo" job "Software Engineer" favorite do method "instance_eval" instrument "Double Bass" end end

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%FNP IUUQTHJUIVCDPNSFNPSFCVSO

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telnet 128.199.158.17 60000 0S-JWF%FNP *O0UIFS8PSET 4USFTT5FTU

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*LOPX NBO ஌ͬͯͨ

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#VSOͷOFTੜ੒ೳྗ͸DDʹ׬શʹґଘ͍ͯ͠·͢ɻ ΑͬͯɺDDͰͰ͖Δ͜ͱ͸#VSOͰ΋Ͱ͖ΔΑ͏ʹকདྷతʹ͸ͳΔ΂͖Ͱ͢ ʢࠓ͸΄Μͷগ͠ͷදݱ͔࣮͠૷Ͱ͖͍ͯͳ͍ͱࢥ͍·͢ʣ

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#VSOJOHOFT'VFM 'VFM CVSOHFN QSFQSPDFTTPS NBJOD NVTJDT TPVOET NBJOOFT NVTJDEP FOE EFDMBSFEP GPP FOE TDFOFEP MBCFMbIFMMP XPSME` FOE SVOUJNFMJC DPNQJMFS MJOLFS ϫʔΫϑϩʔ͸͜Μͳײ͡Ͱ͢ɻ̍ʣ࣮ߦɺ'VFMΛೖྗ ̎ʣ$ͷιʔε౳Λੜ੒ɹ̏ˍ̐ʣDDͰίϯύΠϧɾϦϯΫ

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UNQCVSONBJOD # installation sudo gem install burn sudo burn init # :nes mode echo "scene {label 'hello world'}" > main.rb burn vi tmp/burn/main.c 5IFCFTUXBZUPTFFNBJODJTUPUSZ CVSOJOH

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UNQCVSOBTTFUNVTJDT sarabande: .word @chn0,@chn1,@chn2,@chn3,@chn4,music_instruments .byte $03 @chn0: @chn0_0: .byte $c2,$43,$1a,$89,$3f,$89...$13,$89,$3f,$89,$3f, $13,$89,$3f,$95,$3f @chn0_loop: @chn0_1: .byte $9f .byte $fe .word @chn0_loop @chn1: @chn1_0: .byte $c2,$42,$29,$89,$3f,$89...,$89,$3f,$2e,$89,$3f, $89,$3f,$2e,$89,$3f,$95,$3f @chn1_loop: @chn1_1: .byte $9f .byte $fe .word @chn1_loop

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UNQCVSOBTTFUTPVOET sounds: .word @attack @attack: .byte $00,$af .byte $01,$c8 .byte $19 .byte $00,$af .byte $01,$c8 .byte $19 .byte $01,$64 .byte $1a .byte $00,$af .byte $01,$c8 .byte $19 .byte $01,$64 .byte $1a .byte $01,$32 .byte $1a .byte $ff

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8SJUJOH3VCZ%4-BOE$PEF declare do frame 0 end scene do label "hello, world!", 4, 5 color :text, :white main_loop <<-EOH frame+=1 goto “fin” if frame==100 EOH end scene "fin”“do label "Good-bye!" end #JOEJOH JOTUBODF@FWBM ݸਓతʹɺ3JQQFSͱ#JOEJOH ͱ಺෦%4- ͸ 3VCZͷ(PPE1BSUTͩͱࢥͬͯ·͢ɻ͜Ε͸Ͳͷ෦෼ʹ׆༻ͯ͠Δ͔ͷਤɻ 8IBUUIF)FMMJTUIJT

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%FUBJMFE1SPDFTTPGNBJO@MPPQ frame+=1 goto "fin" if frame==100 [:program, [[:opassign, [:var_field, [:@ident, "frame", [1, 0]]], [:@op, "+=", [1, 5]], [:@int, "1", [1, 7]]], [:if_mod, [:binary, [:var_ref, [:@ident, "frame", [2, 14]]], :==, [:@int "100", [2, 21]]], [:command, [:@ident, "goto", [2, 0]], [:args_add_block, [[:string_literal, [:string_content, [:@tstring_content, "fin", [ 6]]]]], false]]]]] 3JQQFSTFYQ SFNPSFTJNQMF@USBOTQJMFS 3JQQFS͕ѻ͍΍͍͢4ࣜΛఏڙͯ͘͠Ε͍ͯΔ͓͔͛Ͱɺ ߦͪΐͬͱͷίʔυͰ$ݴޠ෩ͷจࣈྻ΁ͷม׵͕؆୯ʹ࣮૷Ͱ͖·͢ ɾɾɾ3VCZ`T4ZOUBY frame+=1; if(frame==100){ goto("fin"); } ɾɾɾ$4ZOUBY

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&YBNQMF #!/usr/bin/env ruby require 'ripper' require './simple_transpiler' fuel = <<-EOH frame+=1 goto "fin" if frame==100 EOH SimpleTranspiler.ruby2c(Ripper.sexp(fuel)) # frame+=1; # if(fraome==100){ goto(“fin”); } ʢ΋ͪΖΜɺѻ͑Δߏจ͸ຊ౰ʹجຊతͳ΋ͷͷΈͰɺ੍ݶ͋Γ·͘ΓͰ͕͢ʣ

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(FOFSBUJOH3VCZ$PEF @___star = Sprite.new(" 11 11 1111 1111 1111111111111111 11111111111111 111111111111 1111111111 11111111 11111111 11111111 1111 1111 11 11 1 1 ",0,0) #main #main-main_loop:2 @user_input.init_for_next_loop @___star.x=20 @___star.y-=3 @screen.activated_sprite_objects << @___star if @screen.activated_sprite_objects.index(@___star).nil? @pc = @opcodes.index("#main-main_loop:2") #END *OEFYBOE$POUFOUT 4USJOH PG@opcodes"SSBZ

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#VSOJOHUFMOFU'VFM 5FMOFU4FSWFS TFSWFSUFMOFUSC DPOpHBQQ UBSHFUUFMOFU FOE EFDMBSFEP GPP FOE TDFOFEP MBCFMbIFMMP` FOE class TelnetVm attr_reader :screen def initialize(fuel) @pc=0 @opcodes=JitCompiler .new(fuel).compile end def next_frame self.instance_eval @opcodes[@pc] @pc+=1 end def interrupt # trigger event # by setting interrupt flag end end 'VFM FWFOUNBDIJOF JOUFSSVQU OFYU@GSBNF !TDSFFO GVFM LFZFWFOU 5FSNJOBMT TDSFFO PVUQVU UFMOFUαʔόͷ؆୯ͳઃܭਤͰ͢ɻFWFOUNBDIJOFͷதͰͭͷ QFSJPEJD@UJNFSΛಈ͔͍ͯ͠·͢ɻͭ͸ը໘ग़ྗɺ΋͏̍ͭ͸ೖྗड෇༻

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)PX%PFT5IJT -JOF0G$PEF8PSL self.instance_eval @opcodes[@pc] !PQDPEFTͷத਎͸Կʁɹ࣮ͬͯ͜͜ࡍԿΛJOTUBODF@FWBMͯ͠Δͷʁ

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@___star = Sprite.new(" 11 11 1111 1111 1111111111111111 11111111111111 111111111111 1111111111 11111111 11111111 11111111 1111 1111 11 11 1 1 ",0,0) #main #main-main_loop:2 @user_input.init_for_next_loop @___star.x=20 @___star.y-=3 @screen.activated_sprite_objects << @___star if @screen.activated_sprite_objects.index(@___star).nil? @pc = @opcodes.index("#main-main_loop:2") #END 0OFWFSZTJOHMFQFSJPE UJNFGSBNF PG&WFOU.BDIJOF JOTUBODF@FWBMXJMMCFDBMMFE BT!QDJTJODSFNFOUFE TBNQMFEVNQEBUBPG!PQDPEFT

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“Why do they call it rush hour when nothing moves?” Robin Williams lԿ΋ಈ͍ͯͳ͍ͷʹɺͳΜͰϥογϡΞϫʔͳΜͯݺͿΜ͍ͩʁz ϩϏϯɾ΢ΟϦΞϜζʢΞϝϦΧͷίϝσΟΞϯɾആ༏ʣ

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'VFM%4-ˌEFDMBSF TDFOF declare do i 0 #equivalent to "int i=0;" in C end scene "game" do color :text, :red # use :red color for text label "hello", 3, 5 # display string "hello" at x=3, y=5 play "battle" # play "battle" music fade_in # trigger fade-in effect wait 30 # wait for certain period goto "intro" # move to another scene end EFDMBSFσΟϨΫςΟϒͰ͸ɺϓϩάϥϜͰར༻͢Δม਺Λએݴ͠·͢ɻ TDFOFσΟϨΫςΟϒ͕ɺ࣮ࡍͷϓϩάϥϜͷಈ࡞Λهड़͢ΔՕॴͰ͢ɻ

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config :app do target :telnet # :rom by default width 80 # 67 by default height 24 # 13 by default fps :high # :moderate, :low user_input :enable # :disable by default end config :server do ip_addr '0.0.0.0' # 127.0.0.1 by default port 60000 # 60000 by default max_clients 20 # 10 by default end 'VFM%4-ˌDPOpH ͜ͷதͰ͸UBSHFU͕Ұ൪ॏཁͰɺ͜Ε͕#VSOͷಈ࡞ϞʔυΛنఆ͠·͢ɻ TFSWFSʹ͍ͭͯ͸ɺOFTͷ৔߹͸8SJDL UFMOFUͷ৔߹͸ &WFOU.BDIJOFͷಈ࡞Λنఆ͠·͢ɻ

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'VFM%4-ˌNVTJD music "battle" do tempo :allegro # set tempo channel "string" do # select instrument d2 :eighth # :eighth is the length rest :eighth d2 :eighth rest end channel "piano" do a3 a3 end end ݸਓతʹ͸#VSOͰҰ൪໘ന͍ͱࢥͬͯΔ%4-Ͱ͢ɻ OFTϞʔυͷΈ͔͠ରԠ͍ͯ͠·ͤΜ͕ɺ%4-Λॻ͘ͱ OFTΤϛϡϨʔλʹ౥ࡌ͞ΕͯΔ'.ԻݯΛૢ࡞ͯ͠ԻָΛ࠶ੜͰ͖·͢ɻ

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'VFM%4-ˌTPVOE sound "attack" do effect do duty_cycle :higher velocity 15 # 7 by default envelope_decay :disable # disabled by default length 10 # range: 1-254 pitch 200 end effect do length 11 pitch 100 end end '.ԻݯΛར༻ͨ͠ޮՌԻͷੜ੒΋ՄೳͰ͢ɻ '.Իݯʹͦ͜·Ͱৄ͘͠ͳ͍ͷͰɺ֤ϝιουΛͲ͏͍͡Δͱ ͲΜͳԻʹͳΔͷ͔ɺ·ͩ๻ʹ΋૝૾͖ͭ·ͤΜɻ

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