123 lines
3.2 KiB
Fennel
123 lines
3.2 KiB
Fennel
(local util (require :lib.util))
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(local {: lo : hi : readjson} util)
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(local lume (require :lib.lume))
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(local tile (util.reload :game.tiles))
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(local {: prg : vm : org : mapw : maph} (util.reload :game.defs))
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(util.reload :game.gfx)
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(util.reload :game.footer)
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(util.reload :game.map)
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(util.reload :game.entity)
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(local {: walkable : neutable} tile.flag-to-bit)
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(vm:word :movement-dir ; key -- dyx
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(vm:case [(string.byte "I") 0xff00]
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[(string.byte "J") 0x00ff]
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[(string.byte "K") 0x0001]
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[(string.byte "M") 0x0100]
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[:else 0x0000]))
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(vm:def :yx+ ; yx yx -- yx
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[:lda vm.TOP :x]
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[:clc] [:adc vm.ST1 :x]
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[:sta vm.ST1 :x]
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[:lda vm.TOPH :x]
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[:clc] [:adc vm.ST1H :x]
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[:sta vm.ST1H :x]
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(vm:drop))
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(vm:var :jaye-yx 0x080f)
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(vm:var :jaye-dir 0xff00)
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(vm:var :neut-yx 0xffff)
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(local controlstate {
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:jaye 0
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:neut 1
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})
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(vm:var :controlstate [:db controlstate.jaye])
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(vm:word :is-jaye? :controlstate :bget controlstate.jaye :=)
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(vm:word :is-neut? :controlstate :bget controlstate.neut :=)
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(vm:word :neut-hidden? :neut-yx :get 0xffff :=)
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(vm:word :jaye-tile ; ptile
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:jaye-dir :get
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(vm:case [0xff00 :lit :jaye-n]
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[0x0100 :lit :jaye-s]
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[0x00ff :lit :jaye-w]
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[:else :lit :jaye-e]))
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(vm:word :draw-jaye-yx ; yx --
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:yx>screen :jaye-tile :drawtile)
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(vm:word :move-jaye-to ; yx --
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:jaye-yx :get :drawtile-at
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:dup :jaye-yx :set :draw-jaye-yx)
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(vm:word :neut-tile :lit :neut1) ; todo: animate
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(vm:word :draw-neut-yx ; yx --
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:yx>screen :neut-tile :drawtile)
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(vm:word :move-neut-to ; yx --
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:neut-yx :get :drawtile-at
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:dup :neut-yx :set :draw-neut-yx)
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(vm:word :move-jaye ; --
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:jaye-dir :get :jaye-yx :get :yx+ :move-jaye-to)
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(vm:word :flag-at? ; yx flag -- f
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:swap :itile-at :lookup-flags :&)
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(vm:word :try-move-jaye ; dir --
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:dup :jaye-dir :set ; dir
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:jaye-yx :get ; dir yx
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:yx+ ; yxnew
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(vm:if-or [[:dup :touch-entity] [:dup walkable :flag-at? :not]]
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[:drop :jaye-yx :get])
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; always "move" so that jaye visibly changes direction
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; touch-entity can modify jaye-yx so we have to refetch
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:move-jaye-to)
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(vm:word :try-move-neut ; dir --
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:neut-yx :get :yx+
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(vm:if-and [[:dup :touch-entity :not] [:dup neutable :flag-at?]]
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[:move-neut-to] [:drop]))
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(vm:word :swap-player :neut-hidden? :not :is-jaye? :& (vm:if [controlstate.neut] [controlstate.jaye]) :controlstate :bset)
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(vm:word :player-key ; key --
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(vm:ifchain
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[:dup (string.byte " ") :=] [:drop :swap-player]
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[:movement-dir :dup] [:is-jaye? (vm:if [:try-move-jaye] [:try-move-neut])]
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[:drop]))
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(vm:word :full-redraw :drawmap :object-redraw)
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(vm:word :object-redraw :jaye-yx :get :draw-jaye-yx)
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(tile.appendtiles org.tiles)
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(tile.appendgfx org.font (tile.loadgfx tile.fn-font))
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; thought:
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; hotswap-safe debug stub at root of call stack
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; but REPL debug stub should be very available as a task
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; 20x12 means full map is 240 bytes - we have an extra 16 bytes at the end to mess with?
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(vm:word :handle-key :read-key :player-key :hide-footer)
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(vm.code:append :main
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[:jsr :reset]
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[:jsr :interpret]
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[:vm :hires
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:full-redraw
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(vm:forever
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(vm:hotswap-sync :full-redraw)
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:interactive-eval-checkpoint
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:handle-key
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)
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:quit])
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(util.reload :game.level1)
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(prg:assemble)
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