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196 | ; SPDX-License-Identifier: BSD-3-Clause
; Copyright © 2021 Fragcolor Pte. Ltd.
(def grid-cols 12)
(def grid-rows 10)
(def empty-grid
[0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0])
(defshards get-index []
(| (Take 0) >= .x)
(| (Take 1) >= .y)
.y (Math.Multiply grid-cols) (Math.Add .x))
(defshards get-free-locations [fruit snake]
[] >= .locations
(ForRange
:From 0 :To (- grid-cols 1) :Action
(-> >= .a
(ForRange
:From 0 :To (- grid-rows 1) :Action
(-> >= .b
[.a .b] (ToInt2) >= .location
(When (-> snake (IndexOf .location) (Is -1) (And) fruit (IsNot .location))
(-> .location (Push .locations)))))))
.locations)
(defshards move-fruit [fruit snake]
(get-free-locations fruit snake) >= .free-loc
(Count .free-loc) >= .max
(RandomInt .max) >= .next-fruit-loc
.free-loc (Take .next-fruit-loc) (ToInt2))
(defshards move-snake [snake offset grow]
snake (RTake 0) (Math.Add offset) (Push snake)
(WhenNot (-> grow) (DropFront snake)))
(defshards populate-grid [fruit snake]
>= .tmp-grid
; first the snake tail and body
snake (Take 0) (get-index) >= .tail-index
[.tail-index 4] (Assoc .tmp-grid)
snake (Slice 1 -1)
(ForEach
(-> (get-index) >= .limb-index
[.limb-index 3] (Assoc .tmp-grid)))
; then the fruit
fruit (get-index) >= .fruit-index
[.fruit-index 1] (Assoc .tmp-grid)
; finally the snake head
snake (RTake 0) (get-index) >= .head-index
[.head-index 2] (Assoc .tmp-grid)
; return the populated grid
.tmp-grid)
(def cell-size 18)
(def x-offset 48)
(def y-offset 36)
(defn render-cells [n]
(if
(= n -1)
nil
(->
(| (int2
(% n grid-cols)
(/ n grid-cols))
(ToFloat2)
(Math.Multiply (float2 cell-size))
(Math.Add (float2 x-offset y-offset)) > .position)
(| (Take n)
(UI.Area
:Position .position
:Contents
(-> (Match
[0 (-> ".") ; empty
1 (-> "F") ; fruit
2 (-> "H") ; head
3 (-> "B") ; body
4 (-> "T") ; tail
]false)
(UI.Label))))
(render-cells (- n 1)))))
(defshards menus []
(UI.MenuBar
(->
(UI.Menu
"File"
(->
(UI.Button "New game" (-> (initialize) (UI.CloseMenu)))
(UI.Separator)
(UI.Button "Quit" (Stop)))))))
(defshards initialize []
[(int2 1 2) (int2 2 2) (int2 3 2) (int2 3 3) (int2 4 3)] >= .snake
false >= .grow
(move-fruit (int2 0 0) .snake) >= .fruit
"right" >= .direction >= .prev-direction
(Time.Now) >= .last-tick
; do it once to not wait the next tick
empty-grid (populate-grid .fruit .snake) >= .grid
false >= .game-over)
(defloop main-wire
(Once (initialize))
; logic
(WhenNot (-> .game-over)
; normal game
(When (-> (Time.Now) (Math.Subtract .last-tick) (IsMoreEqual 0.33))
(-> (Time.Now) > .last-tick
; move the snake
.direction (Match ["up" (move-snake .snake (int2 0 -1) .grow)
"right" (move-snake .snake (int2 1 0) .grow)
"down" (move-snake .snake (int2 0 1) .grow)
"left" (move-snake .snake (int2 -1 0) .grow)])
(Count .snake) (Math.Subtract 1) >= .head-idx
.snake (Take .head-idx) >= .head
; snake eats its own body?
(When (-> .snake (IndexOf .head) (IsNot .head-idx))
(-> true > .game-over))
; snake hits a wall?
(When (-> .head (Take 0) (IsLess 0) (Or) (Take 0) (IsMoreEqual grid-cols)
(Or)
.head (Take 1) (IsLess 0) (Or) (Take 1) (IsMoreEqual grid-rows))
(-> true > .game-over))
; did the snake eat the fruit?
(If (-> .head (Is .fruit))
(-> true > .grow
(move-fruit .fruit .snake) > .fruit)
(-> false > .grow)
:Passthrough true)
(WhenNot (-> .game-over)
(-> empty-grid (populate-grid .fruit .snake) > .grid
.direction > .prev-direction)))))
; window
(GFX.MainWindow
:Title "Snake game" :Width 480 :Height 360
:Contents
(->
(Setup
(GFX.DrawQueue) >= .ui-draw-queue
(GFX.UIPass .ui-draw-queue) >> .render-steps)
.ui-draw-queue (GFX.ClearQueue)
(UI
.ui-draw-queue
(->
(UI.TopPanel :Contents (menus))
(UI.BottomPanel
:Contents
(->
(When (-> .game-over)
(UI.Horizontal
(-> "GAME OVER!" (UI.Label :Style {:color (color 255 0 0)})
(UI.Space 10.0)
"Final score: " (UI.Label)
(Count .snake) (ToString) (UI.Label))))))
.grid
(Setup (float2 0) >= .position)
(render-cells (- (* grid-cols grid-rows) 1))))
(GFX.Render :Steps .render-steps)
(Inputs.KeyDown
"up"
(When (-> .prev-direction (IsNot "down"))
(-> "up" > .direction)))
(Inputs.KeyDown
"right"
(When (-> .prev-direction (IsNot "left"))
(-> "right" > .direction)))
(Inputs.KeyDown
"down"
(When (-> .prev-direction (IsNot "up"))
(-> "down" > .direction)))
(Inputs.KeyDown
"left"
(When (-> .prev-direction (IsNot "right"))
(-> "left" > .direction)))
(Inputs.KeyDown
"space" (initialize)))))
(defmesh root)
(schedule root main-wire)
(run root (/ 1.0 60))
|
