source: abuse/trunk/data/addon/pong/common.lsp Tweet

;; Copyright 1995 Crack dot Com,  All Rights reserved
;; See licensing information for more details on usage rights

; draw function for characters only displayed during edit mode
; such as start, etc.
; (defun dev_draw () (if (edit_mode) (draw) nil))       -- compiled C function --

(defun middle_draw ()
  (let ((y (y)))
    (set_y (+ (y) (/ (picture_height) 2)))
    (draw)
    (set_y y)))



(defun push_char (xamount yamount)
  (let ((bgx (with_object (bg) (x)) (x))
        (bgy (with_object (bg) (y)) (y)))
    (if (and (<= bgy (y)) (< (disty) yamount) (< (distx) xamount))
        (let ((amount (if (> bgx (x))
                          (- xamount (- bgx (x)))
                        (- (- (x) bgx) xamount))))
          (with_object (bg) (try_move amount 0))))))



(defun do_nothing () (next_picture) T)

(defun lhold_ai ()
  (if (> (total_objects) 0)
      (progn
        (set_x (with_object (get_object 0) (x)))
        (set_y (with_object (get_object 0) (- (y) (/ (picture_height) 2) )))))
  (if (eq (total_lights) 1)
      (progn
        (set_light_x (get_light 0) (x))
        (set_light_y (get_light 0) (y)))
    nil)
  T)



(def_char LIGHTHOLD
  (funs  (ai_fun   lhold_ai)
         (draw_fun dev_draw))
  (states "art/misc.spe"
          (stopped           "lhold")))



(def_char OBJ_MOVER
  (funs (ai_fun       mover_ai)
        (constructor  mover_cons)
        (draw_fun     dev_draw))
  (range 300 40)
  (fields ("aitype" "frames till arrival")
           ("aistate" "current frame"))
  (states "art/misc.spe" (stopped '("mover" "mover" ))))

/*    Compiled C
(defun mover_ai ()
  (if (eq (total_objects) 2)
      (let ((dest (get_object 0))
            (mover (get_object 1)))
        (if (< (aistate) 2)             ; transfer object to next mover
            (progn
              (with_object dest
                           (progn
                             (link_object mover)
                             (set_aistate (aitype))))
              (remove_object mover))
          (progn
            (set_aistate (- (aistate) 1))
            (let ((newx (- (with_object dest (x)) (/ (* (- (with_object dest (x)) (x)) (aistate)) (aitype))))
                  (newy (- (with_object dest (y)) (/ (* (- (with_object dest (y)) (y)) (aistate)) (aitype)))))
              (with_object mover
                           (progn
                             (platform_push (- newx (x)) (- newy (y)))
                             (set_x newx)
                             (set_y newy)))))))
    nil)
  T)
*/

(defun mover_cons () (set_aitype 20))


(defun respawn_ai ()
  (let ((x (total_objects)))
    (if (eq x 0)                           ; if not linked to anything return
        T
      (let ((last (get_object (- x 1))))   ; see if the last object has the same position as us
        (if (and (eq (with_object last (x)) (x)) (eq (with_object last (y)) (y)))
            (if (eq (aistate) 1)
                (if (eq (with_object last (fade_count)) 0)
                    (set_aistate 1)
                  (with_object last (set_fade_count (- (with_object last (fade_count)) 1))))
              T)                          ; if so then return
          (if (eq (aistate) 1)
              (set_aistate 0)
            (if (> (state_time) (xvel))
                (let ((new (add_object (with_object (get_object (random x)) (otype)) (x) (y))))
                  (with_object new (set_fade_count 15))   ; make faded out so we can fade it in
                  (link_object new)
                  (set_aistate 1))
              T))))))
  T)

(defun respwan_cons () (set_xvel 50))


(def_char RESPAWN
  (funs (ai_fun      respawn_ai)
        (draw_fun    dev_draw)
        (constructor respwan_cons))
  (flags (unlistable T))
  (fields ("xvel" "frames to regenerate"))
  (range 100 100)
  (states "art/misc.spe"
          (stopped           "respawn")))



(def_char MARKER
  (funs (ai_fun   do_nothing)
        (draw_fun dev_draw))
  (states "art/misc.spe" (stopped "marker")))


(defun get_option (opt_name)
  (do ((i 1 (setq i (+ i 1)))
       (found nil nil))
      ((or (>= i (argc)) found) found)
      (if (equal opt_name (argv i))
          (setq found T))))