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+;;;; examples/08-pong.lisp
+
+(defpackage #:ww.examples/8
+ (:use #:cl)
+ (:export #:start)
+ (:import-from #:defclass-std #:defclass/std))
+
+(in-package #:ww.examples/8)
+
+(defclass/std solo-pong (ww::application)
+ ((paddle ball game-over)))
+
+(defclass/std mobile ()
+ ((dx dy dr :std 0)))
+
+(defclass/std paddle (ww::bitmap mobile) ())
+(defclass/std ball (ww::bitmap mobile) ())
+
+(defun random-velocity (&optional (size 1.0))
+ (* size (if (< 0.5 (random 1.0))
+ (random 1.0)
+ (* -1 (random 1.0)))))
+
+(defun advance-pos (thing)
+ (with-accessors ((dr dr) (dx dx) (dy dy) (x ww::x) (y ww::y) (r ww::rotation)) thing
+ (incf x dx)
+ (incf y dy)
+ (incf r dr)))
+
+
+(ww::defhandler pong-perframe
+ (ww::on-perframe (app)
+ (with-slots (paddle ball game-over) app
+
+ (when (ww::units-intersect-p paddle ball)
+ (setf (dy ball) (* -1 (dy ball))
+ (dr ball) (* -1 (dr ball)))
+ (incf (ww::x ball) (dx ball))
+ (incf (ww::y ball) (dy ball)))
+
+ (with-accessors ((dx dx) (dy dy) (bx ww::x) (by ww::y) (w ww::width) (h ww::height)) ball
+ (cond
+ ((<= 600 (+ by h))
+ (setf dy (* -1 dy))
+ (advance-pos ball))
+
+ ((or (<= 800 (+ bx w)) (<= bx 0))
+ (setf dx (* -1 dx))
+ (advance-pos ball))
+
+ ((<= by 0)
+ (setf (ww::unit-visiblep game-over) t)))
+
+ (advance-pos ball)))))
+
+(ww::defhandler pong-mousemove
+ (ww::on-mousemotion (app x)
+ (setf (ww::x (paddle app))
+ (- x (* 0.5 (ww::width (paddle app)))))))
+
+(defmethod ww::boot ((app solo-pong))
+ (let* ((ball
+ (make-instance
+ 'ball
+ :texture (ww::get-asset "Fezghoul.png")
+ :x 400 :y 300
+ :dr (random-velocity)
+ :dx (random-velocity 10)
+ :dy (random-velocity 10)))
+ (paddle
+ (make-instance
+ 'paddle
+ :texture (ww::get-asset "GelatinousCube.png")
+ :x 400
+ :y 0))
+ (game-over
+ (make-instance
+ 'ww::text
+ :font (ww::get-asset "Ticketing.ttf")
+ :content "Game Over"
+ :visiblep nil
+ :x 300
+ :y 300
+ :scale-x 3.0
+ :scale-y 3.0)))
+ (setf (ww::width paddle) 120
+ (ww::height paddle) 20
+ (paddle app) paddle
+ (ball app) ball
+ (game-over app) game-over)
+
+ (ww::add-unit app ball)
+ (ww::add-unit app paddle)
+ (ww::add-unit app game-over)
+ (ww::add-handler app #'pong-mousemove)
+ (ww::add-handler app #'pong-perframe )))
+
+(defun start ()
+ (ww::start
+ (make-instance
+ 'solo-pong
+ :fps 60
+ :width 800
+ :height 600
+ :refocus-on-mousedown-p nil
+ :title "Now the lonely can enjoy pong."
+ :asset-root
+ (merge-pathnames
+ "examples/"
+ (asdf:system-source-directory :wheelwork)))))