117 lines
4.2 KiB
Fennel
117 lines
4.2 KiB
Fennel
(local utils (require "src/utils.fnl"))
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(local beholder (require "libs/beholder"))
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(local color (require "src/colors.fnl"))
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(local levels (require "levels.fnl"))
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(local assets (require "src/assets.fnl"))
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(var bump-world nil)
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(var level-key nil)
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(lambda bump-filter [item other]
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(if (= other.behavior "block") :slide :cross))
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(lambda angle-to-direction [angle]
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"Convert angle (radians) to compass direction keyword"
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(local tau (* 2 math.pi))
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; Normalize angle to 0-2π range
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(local normalized (% (+ angle tau) tau))
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; Offset by 22.5° (π/8) so section boundaries align with directions
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(local offset (+ normalized (/ math.pi 8)))
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; Find which 45° section (π/4) it falls into
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(local section (math.floor (/ offset (/ math.pi 4))))
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; Map to compass directions
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(local directions [:e :se :s :sw :w :nw :n :ne])
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(. directions (+ (% section 8) 1)))
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(local width 19)
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(local height 15)
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(local player {
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:x 50 :y 50 :w 25 :h 25 :speed 80 :battery 100 :rot 0
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:hitbox [50 50 width height]
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:init-move false ; nudge the player at start of game to trigger starting collisions
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})
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(lambda handle-collisions [cols]
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(each [_ col (pairs cols)]
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(when col.other.on-hit (col.other:on-hit))
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(beholder.trigger "PLAYER.HIT" col.other)))
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(fn player.update [self dt]
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(when (= self.init-move false)
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(set self.init-move true)
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(let [(x y cols len) (bump-world:move self self.x self.y bump-filter)]
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(handle-collisions cols)))
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(let [
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d-key (love.keyboard.isDown :d)
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a-key (love.keyboard.isDown :a)
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e-key (love.keyboard.isDown :e)
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q-key (love.keyboard.isDown :q)]
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(match {:d-key d-key :a-key a-key :e-key e-key :q-key q-key}
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{:d-key true :a-key false :e-key false :q-key false} (set self.rot (+ self.rot (* dt 2)))
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{:d-key false :a-key true :e-key false :q-key false} (set self.rot (- self.rot (* dt 2)))
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{:d-key false :a-key false :e-key true :q-key false} (set self.rot (- self.rot (* dt 2)))
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{:d-key false :a-key false :e-key false :q-key true} (set self.rot (+ self.rot (* dt 2)))
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)
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(when (and (> self.battery 0) (or d-key a-key e-key q-key))
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(let [
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dir-fn (if (or d-key a-key) #(+ $1 $2) #(- $1 $2))
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new-x (dir-fn self.x (* self.speed dt (math.cos self.rot)))
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new-y (dir-fn self.y (* self.speed dt (math.sin self.rot)))
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(x y cols len) (bump-world:move self new-x new-y bump-filter)]
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(handle-collisions cols)
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(set self.x x)
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(set self.y y))
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(if (> self.battery 0)
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(set self.battery (- self.battery (* dt 2))))))
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(beholder.trigger "PLAYER.POS" self.x self.y)
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(beholder.trigger "PLAYER.BATTERY" self.battery))
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(fn player.load [self]
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(set self.battery 100)
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(let [
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spawn-x (-> (. levels :levels level-key :spawns :player-1 :x) (- (/ width 2)))
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spawn-y (-> (. levels :levels level-key :spawns :player-1 :y) (- (/ height 2)))
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(x y cols len) (bump-world:move self spawn-x spawn-y bump-filter)]
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(set self.x x)
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(set self.y y))
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(set self.quads
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(let [
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(w h) (assets.player-sprite:getDimensions)]
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{
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:n (love.graphics.newQuad 0 0 25 25 w h)
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:s (love.graphics.newQuad 25 0 25 25 w h)
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:ne (love.graphics.newQuad 50 0 25 25 w h)
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:e (love.graphics.newQuad 75 0 25 25 w h)
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:se (love.graphics.newQuad 100 0 25 25 w h)
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:sw (love.graphics.newQuad 125 0 25 25 w h)
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:w (love.graphics.newQuad 150 0 25 25 w h)
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:nw (love.graphics.newQuad 175 0 25 25 w h)
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})))
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(fn player.draw50 [self]
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"draw player sprite and hitbox"
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(color:reset-color)
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(love.graphics.draw
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assets.player-sprite
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(. self.quads (angle-to-direction player.rot))
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(- self.x 3) (- self.y 7)))
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(fn player.draw-debug [self]
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"draw player hitbox and direction line"
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(color.set-color :black)
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(love.graphics.rectangle "line" self.x self.y width height)
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(love.graphics.rectangle "line" self.x self.y 1 1)
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(love.graphics.push)
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(let [ox (+ self.x (/ width 2)) oy (+ self.y (/ height 2))]
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(love.graphics.translate ox oy)
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(love.graphics.rotate self.rot)
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(love.graphics.line 0 0 35 0))
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(love.graphics.pop))
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(lambda [{:bump-world bw :level-key key}]
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(set bump-world bw)
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(set level-key key)
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player)
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