honeylisp/game/tiles.fnl

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(local util (require :lib.util))
(local lume (require :lib.lume))
(local files (require :game.files))
(local platforms {
:ii {:mapw 20 :maph 12 :tilew 14 :tileh 16 :editw 16
:font {:tilew 7 :editw 8 :tileh 8}
:brushes {:tilew 7 :editw 8 :tileh 8}
:portraits {:tilew 28 :editw 32 :tileh 32}}
:iigs {:mapw 26 :maph 16 :tilew 12 :tileh 12
:layers [:tiles :iso :iso]
:yoffsets [0 6 0]
:iso {:mapw 12 :maph 28 :tilew 24 :tileh 32 :xstagger 12 :ystagger 6}
:font {:tilew 8 :tileh 8}
:brushes {:tilew 8 :tileh 8}
:portraits {:tilew 32 :tileh 32}}
})
(fn dimensions [] (. platforms (files.platform)))
(fn style [name] (or (. (dimensions) name) (dimensions)))
(fn tile-styles [include-details]
(let [dim (dimensions)
styles {:tiles dim}]
(each [_ layer (ipairs (or dim.layers []))]
(when (not= layer :tiles) (tset styles layer (. dim layer))))
(if include-details styles (lume.keys styles))))
(fn flags [] (or files.game.tileflags [:walkable]))
(fn flag-to-bit []
(collect [iflag flag (ipairs (flags))] (values flag (bit.lshift 1 (- iflag 1)))))
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(fn appendgfx [org gfx ?key ?label-prefix]
(each [_ g (ipairs gfx)]
(when g.label (org:append (.. (or ?label-prefix "") g.label)))
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(org:append [:bytes (. g (or ?key :gfx))])))
(fn appendtiles [org]
(local tiles files.game.tiles)
(local flag-lookup (flag-to-bit))
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(each [tileset key (pairs (or files.game.tilesets {:tileset :gfx}))]
(org:append [:align 0x100] tileset)
(appendgfx org tiles key (if (= key :gfx) nil (.. key :-))))
(appendgfx org files.game.portraits nil :portrait-)
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(org:append :tileflags)
(each [_ tile (ipairs tiles)]
(var flags 0)
(each [flag _ (pairs tile.flags)]
(set flags (bit.bor flags (. flag-lookup flag))))
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(org:append [:db flags])))
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(fn append-portraitwords [vm ?overrides]
(local overrides (or ?overrides {}))
(each [_ p (ipairs files.game.portraits)]
(let [wordname (.. :draw-portrait- p.label)
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override (. overrides p.label)]
(vm:word wordname :show-footer
(if override (override p.label) [:vm :lit (.. :portrait- p.label)])
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:draw-portrait))))
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(fn encode-yx [xy]
(if xy (bit.bor (bit.lshift (- xy.y 1) 8) (- xy.x 1)) 0xffff))
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(fn encode-itile [itile]
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(bit.bor
(bit.lshift (bit.band (- itile 1) 0x07) 5)
(bit.rshift (bit.band (- itile 1) 0xf8) 3)))
(fn decode-itile [enctile]
(+ 1 (bit.bor
(bit.lshift (bit.band enctile 0x1f) 3)
(bit.rshift (bit.band enctile 0xe0) 5))))
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(fn find-itile [tiles label ?itilenext]
(local itile (or ?itilenext 1))
(local tile (. tiles itile))
(assert (not= tile nil) (.. "No such tile " label))
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(if (= tile.label label) (encode-itile itile)
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(find-itile tiles label (+ itile 1))))
{: appendtiles : appendgfx : append-portraitwords : flags : flag-to-bit : find-itile
: encode-yx : encode-itile : decode-itile : dimensions : tile-styles : style}
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