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(local state (require :lib.state))
(local cell (require :lib.cell))
(local cells (require :lib.cells))
(local vec (require :lib.vec))
(local entity (require :lib.entity))
(local player (require :lib.player))
(local fv (require :fennel.view))
(fn lerp* [a b c d x]
(+ c (* (/ (- x a) (- b a)) (- d c))))
(fn new-grid [w h f]
(var t {})
(for [x 0 (- w 1)]
(tset t x {})
(for [y 0 (- h 1)]
(tset (. t x) y (f x y))))
t)
(fn update [self]
;; (set ship-pos.x (+ self.ship.x 0.02))
;; (set ship-pos.y (+ self.ship.y 0.005))
(set self.radius (lerp* 0 1 self.radius self.target-radius 0.3))
(when (= self.tick 0)
(for [x 0 (- self.width 1)]
(for [y 0 (- self.height 1)]
(fn get [v]
(. self.grid
(% (+ v.x x) self.width)
(% (+ v.y y) self.height)))
(if (. self.grid x y)
;; check if alive
(tset self.grid-alt x y (cell.update (. self.grid x y)
get))
;; check for neighbors and then use one at random
(do
(var neighbors [])
(for [x -1 1]
(for [y -1 1]
(table.insert neighbors (get {: x : y}))))
(if (. neighbors 1)
(tset self.grid-alt x y
(cell.birth (. neighbors (math.random (length neighbors))) get))
(tset self.grid-alt x y nil))))))
(set (self.grid self.grid-alt) (values self.grid-alt self.grid)))
(set self.tick (% (+ self.tick 1) self.rate))
;; player steering
(when self.entities.player
(entity.steer self.entities.player
self
:player
{:up (love.keyboard.isDown :up)
:right (love.keyboard.isDown :right)
:left (love.keyboard.isDown :left)
:shoot (love.keyboard.isDown :z)
}))
;; entities
(each [id e (pairs self.entities)]
(tset e entity.position (vec.wrap
(vec.add (entity.position e) (entity.velocity e))
{:x self.width :y self.height}))
(let [x (math.floor (. e entity.position :x))
y (math.floor (. e entity.position :y))
t (. self.grid x y)]
(when t
(entity.collide e self id x y)))
(when (entity.duration e)
(tset e entity.duration (- (entity.duration e) 1))
(if (= (entity.duration e) 0)
(tset self.entities id nil))))
)
(fn id [x] x)
(fn draw [self]
(local (width height) (love.graphics.getDimensions))
;; (love.graphics.scale width height)
(let [ship-pos (if self.entities.player
(entity.position self.entities.player)
self.ship-pos)
camera-size (math.min width height)
radius-x (* self.radius (/ width camera-size))
radius-y (* self.radius (/ height camera-size))
clipped-x (math.min radius-x self.max-radius)
clipped-y (math.min radius-y self.max-radius)
display-a {:x (* width (- 1 (/ clipped-x radius-x)) 0.5)
:y (* height (- 1 (/ clipped-y radius-y)) 0.5)}
display-b {:x (- width display-a.x) :y (- height display-a.y)}
display-size (vec.sub display-b display-a)
camera-a {:x (- ship-pos.x clipped-x)
:y (- ship-pos.y clipped-y)}
camera-b {:x (+ ship-pos.x clipped-x)
:y (+ ship-pos.y clipped-y)}
cell-box (vec.lerp {:x 0 :y 0}
{:x (* 2 clipped-x)
:y (* 2 clipped-y)}
;; TODO: this is wrong
{:x 0 :y 0}
display-size
{:x 1 :y 1})]
;; TODO: this is ugly and weird
(set self.ship-pos ship-pos)
(love.graphics.setScissor (- display-a.x 1) (- display-a.y 1)
(- display-b.x display-a.x -2)
(- display-b.y display-a.y -2))
(love.graphics.setColor 0.2 0.2 0.2)
(love.graphics.setLineWidth 4)
(love.graphics.rectangle :line
display-a.x display-a.y
(- display-b.x display-a.x)
(- display-b.y display-a.y))
(love.graphics.setScissor display-a.x display-a.y
(- display-b.x display-a.x)
(- display-b.y display-a.y))
(love.graphics.clear)
(for [x (math.floor camera-a.x) (math.floor camera-b.x)]
(for [y (math.floor camera-a.y) (math.floor camera-b.y)]
(let [pos {:x (% x self.width) :y (% y self.height)}
render-a (vec.lerp camera-a camera-b display-a display-b
{: x : y})
render-b (vec.lerp camera-a camera-b display-a display-b
{:x (+ x 1) :y (+ y 1)})
the (. self.grid pos.x pos.y)
color (and the (cell.color the))]
(when color
(love.graphics.setColor (unpack color))
(love.graphics.rectangle :fill
(id render-a.x)
(id render-a.y)
(id cell-box.x)
(id cell-box.y))))))
;; draw other stuff
(each [id v (pairs self.entities)]
(love.graphics.push)
(let [pos (entity.position v)
render-pos (vec.lerp camera-a camera-b display-a display-b
(vec.add camera-a
(vec.wrap (vec.sub pos camera-a)
(vec.sub camera-b camera-a))))]
(love.graphics.translate render-pos.x render-pos.y)
(love.graphics.scale cell-box.x
cell-box.y))
(entity.draw v self id)
(love.graphics.pop))
))
;; (love.graphics.setLineWidth 0.1)
;; (love.graphics.line 0 0 0.3 0.3)
;; (love.graphics.polygon :line 0.3 0.3 0.6 0.3 0.4 0.6)
;; (love.graphics.line 0.4 0.8 0.4 0.8)
;; (love.graphics.print :Gaming))
(fn keypressed [self key scancode repeat]
(when (= key "=")
(set self.target-radius
(math.max
self.min-radius
(math.min
self.max-radius
(- self.target-radius 4)))))
(when (= key "-")
(set self.target-radius
(math.max
self.min-radius
(math.min
self.max-radius
(+ self.target-radius 4))))))
(fn init [self]
(local width 64)
(local height 64)
(setmetatable
{:width width
:height height
:ship {:x 31 :y 31}
:radius 32
:target-radius 32
:max-radius (/ (math.min height width) 2)
:min-radius 16
:tick 0
:rate 6
:entities {:player (entity.init player {:x 32 :y 32})}
:grid (new-grid width height #(if (= (math.random 6) 1)
(if (> $1 44)
(cell.init cells.life)
(< $1 10)
(cell.init cells.brain)
nil)
nil))
:grid-alt (new-grid width height #nil)
}
self))
{state.draw draw state.init init state.update update state.keypressed keypressed}
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