170 lines
5.6 KiB
Fennel
170 lines
5.6 KiB
Fennel
(local tile (require :game.tiles))
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(local {: vm : mapw : maph : itile : controlstate} (require :game.defs))
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(local {: walkable : neutable : debris : sittable} 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 0x0a0a)
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(vm:var :jaye-dir 0xff00)
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(vm:var :neut-yx 0x0b08)
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(vm:var :rexx-yx 0xffff)
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(vm:var :gord-yx 0xffff)
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(vm:var :gord-dir 0x0000)
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(vm:var :gord-sitting vm.false)
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(vm:var :libb-yx 0xffff)
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(vm:var :libb-present vm.false)
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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 :is-rexx? :controlstate :bget controlstate.rexx :=)
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(vm:word :is-prog? :is-neut? :is-rexx? :|)
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(vm:word :is-walking? :movable-player-flag walkable :=)
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(vm:word :neut-hidden? :neut-yx :get 0xffff :=)
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(vm:word :rexx-active? :rexx-yx :get 0xffff := :not)
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(vm:word :gord-hidden? :gord-yx :get 0xffff :=)
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(vm:word :gord-following? :gord-hidden? :gord-sitting :get :| :not)
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(vm:word :set-rexx ; e --
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:dup (vm:if [:get controlstate.rexx] [:drop 0xffff controlstate.neut])
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:controlstate :bset :rexx-yx :set)
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(vm:word :player-tile ; -- ptile
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:controlstate :bget
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(vm:case [controlstate.jaye :jaye-tile]
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[controlstate.neut :neut-tile]
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[controlstate.gord :gord-tile]
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[controlstate.libb :libb-tile]
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[:else (itile :t-rexx)]) :lookup-tile)
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(vm:word :player-yx ; -- pyx
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:controlstate :bget
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(vm:case [controlstate.jaye :jaye-yx]
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[controlstate.neut :neut-yx]
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[controlstate.gord :gord-yx]
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[controlstate.libb :libb-yx]
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[:else :rexx-yx]))
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(vm:word :draw-player ; --
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:player-yx :dup (vm:if [:get :dup 0xffff := (vm:if [:drop] [:yx>screen :player-tile :drawtile])] [:drop]))
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(vm:word :set-player-dir ; dir --
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:is-jaye? (vm:if [:jaye-dir :set] [:drop]))
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(vm:word :movable-player-flag ; -- flag
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:is-neut? (vm:if [neutable] [walkable]))
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(vm:word :move-player-to ; yx --
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:player-yx :dup :get :dup 0xffff := (vm:if [:drop] [:drawtile-at])
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:set :draw-player)
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(vm:word :transition-gord-sitting ; yx f --
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controlstate.gord :controlstate :bset
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:gord-sitting :set :move-player-to
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controlstate.jaye :controlstate :bset)
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(vm:word :move-rexx-trash ; yx -- f
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(vm:if-and [[:dup debris :flag-at?] [:is-rexx?]]
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[(itile :t-floor) :update-itile] [:drop])
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vm.false)
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(vm:word :move-gord-sit ; yx -- f
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(vm:if-and [[:dup sittable :flag-at?] [:is-jaye?] [:gord-following?]]
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[vm.true :transition-gord-sitting vm.true]
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[:move-noop]))
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(vm:word :move-gord-stand ; yx -- f
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(vm:if-and [[:gord-yx :get :=] [:is-jaye?] [:gord-sitting :get]]
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[:jaye-yx :get vm.false :transition-gord-sitting 0 :gord-dir :set vm.true]
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[vm.false]))
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(vm:word :move-noop :drop vm.false)
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(vm:word :handle-special-move ; yx -- f
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(vm:if-or [[:dup :map-specific-move] [:dup :move-rexx-trash] [:dup :move-gord-sit] [:dup :move-gord-stand]]
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[:drop vm.true] [:move-noop]))
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(vm:def :yxclip? ; yx -- f
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[:block
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[:lda vm.TOP :x]
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[:cmp mapw]
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[:bcs :clipped]
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[:lda vm.TOPH :x]
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[:cmp maph]
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[:bcs :clipped]
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[:lda 0] [:sta vm.TOP :x] [:sta vm.TOPH :x] (vm:ret)
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:clipped
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[:lda 0xff] [:sta vm.TOP :x] [:sta vm.TOPH :x]])
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(vm:word :try-move-player ; dir --
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:dup :set-player-dir ; dir
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:player-yx :get :yx+ ; yxnew
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(vm:if-or [[:dup :yxclip?] [:dup :touch-entity] [:dup :handle-special-move] [:dup :movable-player-flag :flag-at? :not]]
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[:drop :player-yx :get])
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; always "move" so that player can visibly change direction
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; touch-entity can modify player-yx so we have to refetch
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:move-player-to)
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(vm:word :jaye-tile ; ptile
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:jaye-dir :get
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(vm:case [0xff00 (itile :jaye-n)]
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[0x0100 (itile :jaye-s)]
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[0x00ff (itile :jaye-w)]
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[:else (itile :jaye-e)]))
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(vm:word :gord-tile ; ptile
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:gord-sitting :get
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(vm:if [(itile :gord-sit)]
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[:gord-dir :get
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(vm:case [0xff00 (itile :gord-n)]
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[0x0100 (itile :gord-s)]
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[0x00ff (itile :gord-w)]
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[:else (itile :gord-e)])]))
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(vm:word :neut-tile (itile :neut1)) ; todo: animate
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(vm:word :libb-tile (itile :libb1))
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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 :toggle-player
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(vm:ifchain [:is-prog?] [controlstate.jaye]
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[:rexx-active?] [controlstate.rexx]
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[:neut-hidden?] [controlstate.jaye]
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[controlstate.neut]) :controlstate :bset
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:is-prog? (vm:if [:set-prog-tileset] [:set-human-tileset]) :full-redraw)
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(vm:word :party-follow
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(vm:if-and [[:is-jaye?] [:gord-following?]]
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[controlstate.gord :controlstate :bset
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:gord-yx :get :gord-dir :get :yx+ :move-player-to
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:jaye-dir :get :gord-dir :set
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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 :toggle-player]
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[:dup (string.byte "Z") :=] [:drop :trigger-sidekick]
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[:movement-dir :dup]
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[:player-yx :get :swap ; oldyx dir
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:try-move-player
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:dup :player-yx :get := (vm:if [:drop] [:party-follow :untouch-entity])]
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[:drop]))
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(vm:word :full-redraw :drawmap :player-redraw)
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(vm:word :player-redraw
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:controlstate :bget
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controlstate.count (vm:for (vm:i) :controlstate :bset :draw-player)
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:controlstate :bset)
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