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(use-modules (catbird)
(catbird asset)
(catbird camera)
(catbird kernel)
(catbird mixins)
(catbird mode)
(catbird node)
(catbird node-2d)
(catbird region)
(catbird scene)
(chickadee graphics texture)
(chickadee graphics sprite)
(chickadee math vector)
(chickadee utils)
(ice-9 match)
(oop goops))
(define %default-width 640)
(define %default-height 480)
(define-asset (%tileset (file "assets/images/tiles.png"))
(load-tileset file 32 32))
(define (make-empty-sprite-batch)
(make-sprite-batch #f))
(define-class <tile> ()
(mine? #:accessor mine? #:init-value #f)
(flag? #:accessor flag? #:init-value #f)
(revealed? #:accessor revealed? #:init-value #f)
(neighbor-mines #:accessor neighbor-mines #:init-value 0))
(define-class <minefield> (<node-2d>)
(field-width #:accessor field-width #:init-keyword #:width #:init-value 10)
(field-height #:accessor field-height #:init-keyword #:height #:init-value 10)
(field #:accessor field)
(mines #:accessor mines #:init-keyword mines #:init-value 10)
(batch #:accessor batch #:init-thunk make-empty-sprite-batch))
(define-method (initialize (minefield <minefield>) initargs)
(next-method)
(reset-field minefield))
(define-method (field-ref (minefield <minefield>) x y)
(vector-ref (vector-ref (field minefield) y) x))
(define-method (reset-field (minefield <minefield>))
;; Build new vector of vectors.
(define h (field-height minefield))
(define w (field-width minefield))
(define new-field (make-vector h))
(for-range ((y h))
(let ((new-row (make-vector w)))
(for-range ((x w))
(vector-set! new-row x (make <tile>)))
(vector-set! new-field y new-row)))
(set! (field minefield) new-field)
;; Add mines.
(let loop ((i 0))
(when (< i (mines minefield))
(let ((x (random w))
(y (random h)))
;; Try again if we randomly picked the same place more than
;; once.
(let ((tile (field-ref minefield x y)))
(if (mine? tile)
(loop i)
(begin
(set! (mine? tile) #t)
(loop (+ i 1))))))))
(resize minefield (* w 32.0) (* h 32.0))
(refresh-sprites minefield))
(define-method (refresh-sprites (minefield <minefield>))
(set-sprite-batch-texture! (batch minefield)
(texture-parent
(texture-atlas-ref (artifact %tileset) 0)))
(sprite-batch-clear! (batch minefield))
(for-range ((x (field-width minefield))
(y (field-height minefield)))
(let* ((tile (field-ref minefield x y))
(i (cond
((and (revealed? tile) (mine? tile)) 2)
((revealed? tile) (+ 3 (neighbor-mines tile)))
((flag? tile) 1)
(else 0))))
(sprite-batch-add! (batch minefield)
(vec2 (* x 32.0) (* y 32.0))
#:texture-region
(texture-atlas-ref (artifact %tileset) i)))))
(define-method (render (minefield <minefield>) _alpha)
(draw-sprite-batch* (batch minefield) (world-matrix minefield)))
(define-method (in-bounds? (minefield <minefield>) x y)
(and (>= x 0) (>= y 0)
(< x (field-width minefield))
(< y (field-height minefield))))
(define-method (mine-location? (minefield <minefield>) x y)
(and (in-bounds? minefield x y)
(mine? (field-ref minefield x y))))
(define-method (empty-location? (minefield <minefield>) x y)
(and (in-bounds? minefield x y)
(not (mine? (field-ref minefield x y)))))
(define-method (count-neighboring-mines (minefield <minefield>) x y)
(+ (if (mine-location? minefield (- x 1) (- y 1)) 1 0)
(if (mine-location? minefield x (- y 1)) 1 0)
(if (mine-location? minefield (+ x 1) (- y 1)) 1 0)
(if (mine-location? minefield (- x 1) y) 1 0)
(if (mine-location? minefield (+ x 1) y) 1 0)
(if (mine-location? minefield (- x 1) (+ y 1)) 1 0)
(if (mine-location? minefield x (+ y 1)) 1 0)
(if (mine-location? minefield (+ x 1) (+ y 1)) 1 0)))
(define-method (reveal-if-empty (minefield <minefield>) x y)
(and (empty-location? minefield x y) (reveal minefield x y)))
(define-method (reveal (minefield <minefield>) x y)
(let ((tile (field-ref minefield x y)))
(unless (or (revealed? tile) (flag? tile))
(set! (revealed? tile) #t)
(unless (mine? tile)
(let ((n (count-neighboring-mines minefield x y)))
(set! (neighbor-mines tile) n)
(when (= n 0)
(reveal-if-empty minefield (- x 1) (- y 1))
(reveal-if-empty minefield x (- y 1))
(reveal-if-empty minefield (+ x 1) (- y 1))
(reveal-if-empty minefield (- x 1) y)
(reveal-if-empty minefield (+ x 1) y)
(reveal-if-empty minefield (- x 1) (+ y 1))
(reveal-if-empty minefield x (+ y 1))
(reveal-if-empty minefield (+ x 1) (+ y 1))))))))
(define-method (toggle-flag (minefield <minefield>) x y)
(let ((tile (field-ref minefield x y)))
(set! (flag? tile) (not (flag? tile)))))
(define-method (field-state (minefield <minefield>))
(let y-loop ((y 0) (state 'win))
(if (< y (field-height minefield))
(case (let x-loop ((x 0) (state 'win))
(if (< x (field-width minefield))
(let ((tile (field-ref minefield x y)))
(cond
((and (revealed? tile) (mine? tile))
'lose)
((and (not (revealed? tile)) (not (mine? tile)))
(x-loop (+ x 1) 'in-progress))
(else
(x-loop (+ x 1) state))))
state))
((win)
(y-loop (+ y 1) state))
((lose) 'lose)
((in-progress)
(y-loop (+ y 1) 'in-progress)))
state)))
(define-method (local->tile p)
(let ((tx (inexact->exact (floor (/ (vec2-x p) 32.0))))
(ty (inexact->exact (floor (/ (vec2-y p) 32.0)))))
(values tx ty)))
(define-class <minesweeper-mode> (<major-mode>))
(define-method (on-enter (mode <minesweeper-mode>))
(let ((minefield (make <minefield> #:name 'minefield)))
(attach-to (parent mode) minefield)
(center-in-parent minefield)))
(define (world->tile node p)
(local->tile (world->local node p)))
(define-method (pick-tile (mode <minesweeper-mode>) x y proc)
(let* ((p (vec2 x y))
(picked (pick (parent mode) p)))
(when picked
(call-with-values (lambda () (world->tile picked p))
(lambda (tx ty)
(proc picked tx ty))))))
(define-method (on-primary-click (mode <minesweeper-mode>) x y)
(pick-tile mode x y
(lambda (minefield tx ty)
(reveal minefield tx ty)
(refresh-sprites minefield)
(case (field-state minefield)
((win)
(push-major-mode (parent mode)
(make <reset-game-mode>
#:message "YOU WIN")))
((lose)
(push-major-mode (parent mode)
(make <reset-game-mode>
#:message "OOPSIES :(")))))))
(define-method (on-alt-click (mode <minesweeper-mode>) x y)
(pick-tile mode x y
(lambda (minefield tx ty)
(toggle-flag minefield tx ty)
(refresh-sprites minefield))))
(bind-input <minesweeper-mode> (mouse-release 'left) on-primary-click)
(bind-input <minesweeper-mode> (mouse-release 'right) on-alt-click)
(define-class <reset-game-mode> (<major-mode>)
(message #:accessor message #:init-keyword #:message))
(define-method (on-enter (mode <reset-game-mode>))
(let ((msg (make <label>
#:name 'message
#:text (message mode)
#:rank 99)))
(attach-to (parent mode) msg)
(center-horizontal-in-parent msg)
(set! (position-y msg) (- (height (parent mode)) 48.0))))
(define-method (on-primary-click (mode <reset-game-mode>) x y)
(let ((scene (parent mode)))
(detach (& scene message))
(reset-field (& (parent mode) minefield))
(pop-major-mode (parent mode))))
(bind-input <reset-game-mode> (mouse-release 'left) on-primary-click)
(define (launch-game)
(let ((region (create-full-region #:name 'main))
(scene (make <scene> #:name 'minesweeper)))
(replace-scene region scene)
(set-camera region (make <camera-2d>))
(replace-major-mode scene (make <minesweeper-mode>))))
(when (batch-mode?)
(run-catbird launch-game
#:width %default-width
#:height %default-height))
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