22c7398e63
- scaled assets to 960x540 and adjusted window for that size - adjusted ground level - collect background and foreground actions in functions - tuned physics
155 lines
4.2 KiB
Common Lisp
155 lines
4.2 KiB
Common Lisp
(defpackage :flappy-ball
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(:use :cl :sketch)
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(:export :flappy-ball :on-click :on-key :setup
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:make-ball :ball-x :ball-y :ball-velocity :ball-size :ball-move :ball-flap :ball-draw
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:make-pipe :pipe-x :pipe-height :pipe-gap :pipe-width :pipe-draw :pipe-collides))
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(in-package :flappy-ball)
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;; Create a new ball entity
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;; (make-ball 10 20 -5.6)
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(defun make-ball (x y velocity size)
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(list x y velocity size))
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(defun ball-x (ball)
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(car ball))
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(defun ball-y (ball)
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(cadr ball))
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(defun ball-velocity (ball)
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(caddr ball))
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(defun ball-size (ball)
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(cadddr ball))
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(defun ball-move (ball gravity max-height)
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(let ((size (ball-size ball))
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(velocity (ball-velocity ball)))
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(make-ball
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(ball-x ball)
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(alexandria:clamp (+ (ball-y ball) velocity) size (- max-height size))
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(+ velocity gravity)
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size)))
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(defun ball-flap (ball flap-speed)
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(list
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(ball-x ball)
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(ball-y ball)
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flap-speed
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(ball-size ball)))
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(defun ball-draw (ball pen)
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(with-pen pen
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(circle (ball-x ball) (ball-y ball) (ball-size ball))))
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;; -------------------------------------------------------------
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;; Create a new pipe entity
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;; (setf pipe (make-pipe 10 200 100 20))
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(defun make-pipe (x height gap width)
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(list x height gap width))
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;; Accessors
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;; (pipe-x pipe)
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(defun pipe-x (pipe)
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(car pipe))
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;; (pipe-height pipe)
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(defun pipe-height (pipe)
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(cadr pipe))
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;; (pipe-gap pipe)
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(defun pipe-gap (pipe)
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(caddr pipe))
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;; (pipe-width pipe)
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(defun pipe-width (pipe)
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(cadddr pipe))
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(defun pipe-draw (pipe pen scroll-x height)
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(let ((x (- (pipe-x pipe) scroll-x))
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(h (pipe-height pipe))
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(gap (pipe-gap pipe))
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(w (pipe-width pipe)))
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(with-pen pen
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(rect x 0 w h)
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(rect x (+ h gap) w (- height h gap)))))
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(defun pipe-collides (pipe ball scroll-x)
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(let ((x (- (pipe-x pipe) scroll-x))
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(h (pipe-height pipe))
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(gap (pipe-gap pipe))
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(w (pipe-width pipe))
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(bx (ball-x ball))
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(by (ball-y ball))
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(bs (ball-size ball)))
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(and (<= (- x bs) bx (+ x w bs))
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(not (<= (+ h bs) by (- (+ h gap) bs))))))
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;; -------------------------------------------------------------
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(defun draw_image_layer(resource scroll-x)
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(let ((pic (load-resource resource))
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(offset (mod scroll-x 960))
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)
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(draw (crop pic offset 0 960 540)
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:x 0 :y 0 :width 960 :height 540)))
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(defun draw_background (scroll-x)
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(draw_image_layer "assets/level1/sky.png" 0)
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(draw_image_layer "assets/level1/clouds.png" (* -0.15 scroll-x))
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(draw_image_layer "assets/level1/far.png" (* 0.25 scroll-x))
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(draw_image_layer "assets/level1/middle.png" (* 0.6 scroll-x)))
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(defun draw_foreground (pipes scroll-x pipe-pen height)
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(dolist (pipe pipes)
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(pipe-draw pipe pipe-pen scroll-x height))
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(draw_image_layer "assets/level1/ground.png" scroll-x))
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(defsketch flappy-ball
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((title "Flappy Ball")
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(width 960)
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(height 540)
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(ground-level 440)
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(copy-pixels nil)
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(ball (make-ball (/ width 10) (/ height 3) 0 10))
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(gravity 0.025)
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(flap-speed -1)
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(ball-pen (make-pen :stroke (gray 0.5) :fill sketch:+yellow+ :weight 1))
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(collision-pen (make-pen :stroke (gray 0.5) :fill sketch:+red+ :weight 1))
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(pipe-pen (make-pen :stroke (gray 0.5) :fill sketch:+green+ :weight 1))
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(pipes (list
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(make-pipe 200 100 100 20)
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(make-pipe 400 200 100 20)
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(make-pipe 600 300 100 20)))
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(scroll-x 0.0)
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(scroll-speed 0.2))
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(draw_background scroll-x)
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(draw_foreground pipes scroll-x pipe-pen height)
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(ball-draw ball
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(if (some (lambda (pipe) (pipe-collides pipe ball scroll-x)) pipes)
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collision-pen
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ball-pen))
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(setf scroll-x (+ scroll-x scroll-speed))
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(setf ball (ball-move ball gravity ground-level)))
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(defmethod on-click ((instance flappy-ball) x y)
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(with-slots (ball flap-speed) instance
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(setf ball (ball-flap ball flap-speed))))
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(defmethod on-key ((instance flappy-ball) key state)
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(with-slots (ball flap-speed) instance
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(setf ball (ball-flap ball flap-speed))))
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(defmethod setup ((instance flappy-ball) &key &allow-other-keys)
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(background (gray 1)))
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