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|
#lang racket/base
(require racket/class
racket/draw)
(provide make-a-move
draw-board
update-pen/draw-blob
update-dc-scale
colors
board-ref
cell-w
cell-h
find-same-colors)
;; these are the sizes that the on-paint callback draws at;
;; a scaling factor is applied to make the board fit the window
(define cell-w 11)
(define cell-h 11)
(define pen-size 10)
(define colors (map (lambda (x) (make-object color% x))
(list "blue" "red" "brown" "forestgreen" "purple")))
(define pale-colors
(for/list ([x (in-list colors)])
(define (paleize x) (- 255 (floor (* (- 255 x) 2/3))))
(make-object color%
(paleize (send x red))
(paleize (send x green))
(paleize (send x blue)))))
(define (draw-board dc board-width board-height board cw ch
mouse-current-x mouse-current-y mouse-clicked-x mouse-clicked-y)
(send dc erase)
(send dc set-smoothing 'smoothed)
(update-dc-scale dc cw ch board-width board-height)
(define painted (make-hash))
(for* ([i (in-range 0 board-width)]
[j (in-range 0 board-height)])
(unless (hash-ref painted (xy->key board-width i j) #f)
(define color (vector-ref (board-ref board i j) 0))
(when color
(define blob (find-same-colors board board-width board-height i j))
(for ([x (in-list blob)])
(hash-set! painted (xy->key board-width (blob-sel-x x) (blob-sel-y x)) #t))
(update-pen/draw-blob
blob dc color
mouse-current-x mouse-current-y mouse-clicked-x mouse-clicked-y)))))
(define (update-dc-scale dc cw ch board-width board-height)
(send dc set-scale
(/ cw (* board-width cell-w))
(/ ch (* board-height cell-h))))
(define (update-pen/draw-blob
blob dc color
mouse-current-x mouse-current-y mouse-clicked-x mouse-clicked-y)
(define mouse-over? #f)
(define mouse-clicked-over? #f)
(define multiple-cells? (not (or (null? blob) (null? (cdr blob)))))
(when (or (number? mouse-current-x)
(number? mouse-clicked-x))
(for ([obj (in-list blob)])
(define x (blob-sel-x obj))
(define y (blob-sel-y obj))
(when (and (equal? x mouse-current-x)
(equal? y mouse-current-y))
(set! mouse-over? #t))
(when (and (equal? x mouse-clicked-x)
(equal? y mouse-clicked-y))
(set! mouse-clicked-over? #t))))
(cond
[mouse-clicked-x ;; has the mouse been clicked in a clickable place?
(cond
[(and mouse-over? mouse-clicked-over? multiple-cells?)
(send dc set-pen (list-ref pale-colors color) (* pen-size 2/3) 'solid)
(draw-blob dc blob)]
[else
(send dc set-pen
(list-ref colors color)
pen-size
'solid)
(draw-blob dc blob)])]
[else
(cond
[mouse-over?
(send dc set-pen (list-ref pale-colors color) pen-size 'solid)
(draw-blob dc blob)]
[else
(send dc set-pen (list-ref colors color) pen-size 'solid)
(draw-blob dc blob)])]))
(define (draw-blob dc blob)
(define (connect x1 y1 x2 y2)
(send dc draw-line
(+ (/ cell-w 2) (* x1 cell-w))
(+ (/ cell-h 2) (* y1 cell-h))
(+ (/ cell-w 2) (* x2 cell-w))
(+ (/ cell-h 2) (* y2 cell-h))))
(cond
[(null? (cdr blob))
(define pt (car blob))
(connect (blob-sel-x pt) (blob-sel-y pt) (blob-sel-x pt) (blob-sel-y pt))]
[else
(for* ([b1 (in-list blob)]
[b2 (in-list blob)])
(when (= (+ (abs (- (blob-sel-x b1) (blob-sel-x b2)))
(abs (- (blob-sel-y b1) (blob-sel-y b2))))
1)
(connect (blob-sel-x b1) (blob-sel-y b1) (blob-sel-x b2) (blob-sel-y b2))))]))
(define (xy->key board-width x y) (+ (* board-width y) x))
(define (make-same-bitmap pth)
(define bw 32)
(define bh 32)
(define bitmap (make-bitmap bw bh))
(define bdc (make-object bitmap-dc% bitmap))
(define board-width 3)
(define board-height 3)
(define board
(vector (vector (vector 0 #f) (vector 1 #f) (vector 4 #f))
(vector (vector 0 #f) (vector 1 #f) (vector 1 #f))
(vector (vector 3 #f) (vector 3 #f) (vector 2 #f))))
(draw-board bdc board-width board-height board bw bh
#f #f #f #f)
(send bdc set-bitmap #f)
(send bitmap save-file pth 'png))
; (make-same-bitmap "same.png")
;; make-a-move : num num board num num -> num or #f
;; mutates 'board' to reflect removing the blob at (i,j)
;; result is the size of the removed blob, or #f if nothing got removed
(define (make-a-move i j board board-width board-height)
(let ([same-colors (find-same-colors board board-width board-height i j)])
(cond
[(< (length same-colors) 2)
#f]
[else
;; slide down empty pieces
(let ([is null])
(for-each
(lambda (p)
(let ([i (blob-sel-x p)]
[j (blob-sel-y p)])
(unless (member i is)
(set! is (cons i is)))
(let loop ([x j])
(cond
[(<= 1 x)
(let ([next (board-ref board i (- x 1))]
[this (board-ref board i x)])
(vector-set! this 0 (vector-ref next 0))
(loop (- x 1)))]
[else
(vector-set! (board-ref board i x) 0 #f)]))))
(sort same-colors
(lambda (x y) (<= (blob-sel-y x) (blob-sel-y y)))))
;; slide empty over empty rows
(set! is (sort is >))
(let ([empty-is
(filter (lambda (i)
(not (vector-ref
(board-ref board i (- board-height 1))
0)))
is)])
(let ([is (if (null? empty-is)
is
(filter (lambda (x) (< x (car empty-is)))
is))])
(for-each (lambda (empty-i)
(let loop ([i empty-i])
(cond
[(<= i (- board-width 2))
(vector-set! board i (vector-ref board (+ i 1)))
(loop (+ i 1))]
[(= i (- board-width 1))
(vector-set!
board
i
(build-vector board-height
(λ (i) (vector #f #f))))])))
empty-is))))
(length same-colors)])))
(define (blob-sel-x b) (vector-ref b 1))
(define (blob-sel-y b) (vector-ref b 2))
(define (board-ref b x y) (vector-ref (vector-ref b x) y))
(define (find-same-colors board board-width board-height i j)
(let* ([index (vector-ref (board-ref board i j) 0)]
[ans
(let loop ([i i]
[j j]
[ps null])
(cond
[(not (and (<= 0 i) (< i board-width)
(<= 0 j) (< j board-height)))
ps]
[else
(let ([v (board-ref board i j)])
(cond
[(vector-ref v 1) ps]
[(not (vector-ref v 0)) ps]
[(= index (vector-ref v 0))
(vector-set! v 1 #t)
(loop (+ i 1)
j
(loop (- i 1)
j
(loop i
(- j 1)
(loop i
(+ j 1)
(cons (vector v i j)
ps)))))]
[else ps]))]))])
(for-each (lambda (p) (vector-set! (vector-ref p 0) 1 #f)) ans)
ans))
|
