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|
; Blocks World from Winston&Horn
; modified for XLISP and graphics by Tom Almy
#-:classes (load "classes")
;
; Functions for graphic assistance
(defvar *bx* 0) ; text communication region
(defvar *by* 21)
(defvar *gx* 50) ; Graphic region origin
(defvar *gy* 100)
(defvar *ymax* 349) ; height of display
(defvar *char-width* 8) ; width of characters
(defvar *char-height* 14) ; height of characters
(defvar *step-size* 10) ; lcd of block widths
(defvar *delay-time* 0.3) ; delay time in seconds
; Move the cursor to nearest position to graphic coordiates
#+:math (defun setgpos (x y)
(goto-xy (round (+ x *gx*) *char-width*)
(round (- *ymax* y *gy*) *char-height*)))
#-:math (defun setgpos (x y)
(goto-xy (truncate (/ (+ x *gx*) *char-width*))
(truncate (/ (+ (/ *char-height* 2) (- *ymax* y *gy*))
*char-height*))))
; Move the cursor to the currently set bottom position and clear the line
; under it
(defun bottom ()
(goto-xy *bx* (+ *by* 1))
(cleol)
(goto-xy *bx* *by*)
(cleol)
(goto-xy *bx* (- *by* 1))
(cleol)
(color 15) ; Force color to white
nil)
; Clear the screen and go to the bottom
(defun cb ()
(cls)
(bottom))
; Go to graphics mode
(defun gmode ()
(mode 16)
(setq *by* 21)
(setq *ymax* 349) ; reset defaults
(setq *char-height* 14))
(defun gmode480 () ; this is for GENOA SuperEGA HiRes+
(mode 115 115 640 480)
(setq *ymax* 480)
(setq *by* 21)
(setq *char-height* 8))
(defun gmode600 () ; this is for GENOA SuperEGA HiRes+
(mode 121 121 800 600)
(setq *by* 21)
(setq *ymax* 600)
(setq *char-height* 8))
(defun gmodev () ; EVEREX 640x480 mode
(setq *by* 21)
(mode 112 0 640 480)
(setq *ymax* 480)
(setq *char-height* 14)
(display-blocks))
(defun gmodeVGA800 () ; this is for Video 7 FastWrite/VRAM VGA
(mode 28421 98 800 600)
(setq *by* 21)
(setq *ymax* 600)
(setq *char-height* 8)
(display-blocks))
(defun gmodeVGA (&aux dims) ; standard 640x480 VGA
; Modified so it will work in Windows as well
(setq dims (mode 18))
(setq *ymax* (1+ (fourth dims)))
(setq *by* 9)
#+:math (setq *char-height* (truncate (1+ (fourth dims)) (second dims)))
#+:math (setq *char-width* (truncate (1+ (third dims)) (first dims)))
#-:math (setq *char-height* (truncate (/ (1+ (fourth dims)) (second dims))))
#-:math (setq *char-width* (truncate (/ (1+ (third dims)) (first dims))))
(setq *gy* (truncate (* 2.5 *char-height*)))
(display-blocks))
; abstract classes for ball types
; basic blocks support nothing
(defclass basic-block (name color width height position supported-by))
(defmethod basic-block :support-for () nil)
(defmethod basic-block :top-location ()
(list (+ (first position) (/ width 2))
(+ (second position) height)))
(defmethod basic-block :drawname ()
(setgpos (+ (first position)
(/ (- width (* *char-width* (flatc name))) 2))
(+ (second position) (/ height 2)))
(color color) ; For Windows, which does color text
(princ name))
(defmethod basic-block :undrawname ()
(setgpos (+ (first position)
(/ (- width (* *char-width* (flatc name))) 2))
(+ (second position) (/ height 2)))
(dotimes (i (flatc name)) (princ " ")))
(defmethod basic-block :draw ()
(color (+ color 128))
(move (+ *gx* (first position)) (+ *gy* (second position)))
(drawrel (1- width) 0
0 (1- height)
(- 1 width) 0
0 (- 1 height)))
; movable-blocks can be moved
(defclass movable-block () () basic-block)
(defmethod movable-block :new-position (newpos)
(send self :draw)
(send self :undrawname)
(setf position newpos)
(send self :drawname)
(send self :draw))
; load-bearing blocks can support other blocks, and can be moved
(defclass load-bearing-block (support-for) () movable-block)
; we can't have multiple inheritance, so we need a separate class for table
; table blocks can support other blocks but cannot be moved.
(defclass table-block (support-for) () basic-block)
; Specific classes for table brick wedge and ball
(defclass brick () () load-bearing-block)
(defclass wedge () () movable-block)
(defmethod wedge :draw ()
(color (+ color 128))
(move (+ *gx* (first position)) (+ *gy* (second position)))
(drawrel (1- width) 0
(- 1 (/ width 2)) (1- height )
(- (/ width 2) width 1) (- 1 height)))
(defclass ball () () movable-block)
(defmethod ball :draw ()
(color (+ color 128))
(let ((cx (+ (first position) (/ width 2) -1 *gx*))
(cy (+ (second position) (/ height 2) -1 *gy*))
(fstep (/ 3.14159 18))
(radius (1- (/ (min width height) 2))))
(move (+ cx radius) cy)
(dotimes (i 36)
(draw (truncate (+ cx (* radius (cos (* (1+ i) fstep)))))
(truncate (+ cy (* radius (sin (* (1+ i) fstep)))))))))
(defclass hand (name position grasping))
(defmethod hand :top-location () position)
(defmethod hand :draw ()
(color (if grasping 143 136))
(move (+ *gx* -7 (first position)) (+ *gy* (second position)))
(drawrel 5 0 0 10 5 0 0 -10 5 0 0 20 -15 0 0 -20))
(defmethod hand :new-position (newpos)
(send self :draw)
(setf position newpos)
(send self :draw))
; define all the individual blocks
(setf *blocks*
(list
(send table-block :new :name 'table :width 430 :height 10
:position '(0 0) :color 7)
(send brick :new :name 'b1 :width 40 :height 40
:position '(0 10) :color 1)
(send brick :new :name 'b2 :width 40 :height 40
:position '(40 10) :color 2)
(send brick :new :name 'b3 :width 80 :height 80
:position '(80 10) :color 3)
(send brick :new :name 'b4 :width 40 :height 40
:position '(160 10) :color 4)
(send wedge :new :name 'w5 :width 40 :height 80
:position '(200 10) :color 5)
(send brick :new :name 'b6 :width 80 :height 40
:position '(240 10) :color 6)
(send wedge :new :name 'w7 :width 40 :height 40
:position '(320 10) :color 9)
(send ball :new :name 'l8 :width 40 :height 40
:position '(360 10) :color 10)
(send brick :new :name 'b9 :width 30 :height 30
:position '(400 10) :color 12)
))
(dolist (l *blocks*) (set (send l :name) l))
(dolist (l (rest *blocks*)) ; all blocks but the table
(setf (send table :support-for)
(cons l (send table :support-for))
(send l :supported-by)
table))
(definst hand *hand* :name '*hand* :position '(0 120))
(defun display-blocks ()
(cls)
(dolist (l *blocks*) (send l :drawname)(send l :draw))
(send *hand* :draw)
(bottom)
t)
(defmethod basic-block :put-on (support) ; default case is bad
(format t
"Sorry, the ~a cannot be moved.~%"
name))
(defmethod movable-block :put-on (support)
(if (send self :get-space support)
(and (send *hand* :grasp self)
(send *hand* :move self support)
(send *hand* :ungrasp self))
(format t
"Sorry, there is no room for ~a on ~a.~%"
name
(send support :name))))
(defmethod movable-block :get-space (support)
(or (send self :find-space support)
(send self :make-space support)))
(defmethod hand :grasp (obj)
(unless (eq grasping obj)
(when (send obj :support-for)
(send obj :clear-top))
(when grasping
(send grasping :rid-of))
(let ((lift (max-height self obj)))
(send self :new-position lift)
(pause *delay-time*)
(send self :new-position
(list (first (send obj :top-location)) (second lift)))
(pause *delay-time*)
(send self :new-position (send obj :top-location))
(pause *delay-time*))
(send self :draw)
(setf grasping obj)
(send self :draw))
t)
(defmethod hand :ungrasp (obj)
(when (send obj :supported-by)
(send self :draw)
(setf grasping nil)
(send self :draw)
t))
(defmethod movable-block :rid-of ()
(send self :put-on table))
(defmethod movable-block :make-space (support)
(dolist (obstruction (send support :support-for))
(send obstruction :rid-of)
(let ((space (send self :find-space support)))
(when space (return space)))))
(defmethod load-bearing-block :clear-top ()
(dolist (obstacle support-for) (send obstacle :rid-of))
t)
(defmethod hand :move (obj support)
(send obj :remove-support)
(let ((newplace (send obj :get-space support)))
(let ((lift (max-height obj support)))
(send obj :new-position lift)
(send self :new-position (send obj :top-location))
(pause *delay-time*)
(send obj :new-position (list (first newplace) (second lift)))
(send self :new-position (send obj :top-location))
(pause *delay-time*)
(send obj :new-position newplace)
(send self :new-position (send obj :top-location))
(pause *delay-time*)))
(send support :add-support obj)
t)
; helper function to find height necessary to move object
(defun max-height (obj1 obj2)
(let ((source (first (send obj1 :top-location)))
(dest (first (send obj2 :top-location))))
(let ((roof 0) (min (min source dest)) (max (max source dest)) )
(dolist (obstacle *blocks*)
(let ((x (send obstacle :top-location)))
(when (and (>= (first x) min)
(<= (first x) max)
(> (second x) roof))
(setf roof (second x)))))
(list (first (send obj1 :position)) (+ 20 roof)))))
#+:times (defun pause (time)
(let ((fintime (+ (* time internal-time-units-per-second)
(get-internal-run-time))))
(loop (when (> (get-internal-run-time) fintime)
(return-from pause)))))
#-:times (defun pause () (dotimes (x (* time 1000))))
; remove-support-for is defined twice, for each load bearing class
(defmethod load-bearing-block :remove-support-for (obj)
(setf support-for (remove obj support-for))
t)
(defmethod table-block :remove-support-for (obj)
(setf support-for (remove obj support-for))
t)
(defmethod movable-block :remove-support ()
(when supported-by
(send supported-by :remove-support-for self)
(setf supported-by nil))
t)
(defmethod load-bearing-block :add-support (obj)
(setf support-for
(cons obj support-for)
(send obj :supported-by)
self)
t)
(defmethod table-block :add-support (obj)
(setf support-for
(cons obj support-for)
(send obj :supported-by)
self)
t)
(defmethod basic-block :add-support (obj)
t)
(defmethod movable-block :find-space (support)
(do ((offset (- (send support :width) width)
(- offset *step-size*)))
((< offset 0))
(unless (intersections-p self offset
(first (send support :position))
(send support :support-for))
(return (list (+ offset (first (send support
:position)))
(+ (second (send support :position))
(send support :height)))))))
(defun intersections-p (obj offset base obstacles)
(dolist (obstacle obstacles)
(let* ((ls-proposed (+ offset base))
(rs-proposed (+ ls-proposed (send obj :width)))
(ls-obstacle (first (send obstacle :position)))
(rs-obstacle (+ ls-obstacle (send obstacle :width))))
(unless (or (>= ls-proposed rs-obstacle)
(<= rs-proposed ls-obstacle))
(return t)))))
(defun m (a b) (send a :put-on b) (bottom))
(defun d () (display-blocks))
(gmodeVGA)
(d)
|
