Testing collisions.

[gacela.git] / games / asteroids / asteroids.scm

diff --git a/games/asteroids/asteroids.scm b/games/asteroids/asteroids.scm
index 756dd73d4e5bf7dd14e4c83af5b8138ca0aa8f8e..0ce6832165538e33c6b4392da6fafb823059c407 100644 (file)
--- a/games/asteroids/asteroids.scm
+++ b/games/asteroids/asteroids.scm
@@ -5,9 +5,16 @@
 (define max-y (/ (assoc-ref (get-game-properties) 'height) 2))
 (define min-y (- max-y))
 
+(define-macro (asteroid-killed?)
+  `(> (apply +
+            (map-mobs
+             (lambda (s) (if (< (distance-between-points (list (assoc-ref s 'x) (assoc-ref s 'y)) (list x y)) size) 1 0))
+             'shot))
+      0))
+
 (define-mob (asteroid
             (image (load-texture "Asteroid.png"))
-            (x 0) (y 0) (angle 0) (dir 0))
+            (x 0) (y 0) (angle 0) (dir 0) (size 100))
   (let ((r (degrees-to-radians (- dir))))
     (set! x (+ x (sin r)))
     (set! y (+ y (cos r))))
@@ -18,6 +25,7 @@
   (cond ((or (> y max-y) (< y min-y))
         (set! dir (- 180 dir))))
   
+  (if (asteroid-killed?) (kill-me))
   (translate x y)
   (rotate angle)
   (draw-texture image))
@@ -76,6 +84,11 @@
 
 (init-asteroids 2)
 (show-mob (make-ship))
+     
+(let ((font (load-font "../tetris/lazy.ttf" #:size 20)))
+  (run-game
+   (render-text (format #f "Mobs: ~a" (length (get-active-mobs))) font)))
+
 
 ;;   (define (new-game n)
 ;;     (set! asteroids (make-asteroids n))
@@ -92,31 +105,6 @@
 ;;             (assoc-ref (car a) 'size))
 ;;          (killed-ship? s (cdr a))))))
 
-;; (define (kill-asteroids s a)
-;;   (define (f1 s1 a)
-;;     (cond ((null? a)
-;;        (values a #f))
-;;       (else
-;;        (let ((a1 (car a)))
-;;          (cond ((< (distance-between-points (list (assoc-ref s1 'x) (assoc-ref s1 'y))
-;;                                             (list (assoc-ref a1 'x) (assoc-ref a1 'y)))
-;;                    (assoc-ref a1 'size))
-;;                 (values (cdr a) #t))
-;;                (else
-;;                 (receive (an k) (f1 s1 (cdr a))
-;;                          (values (cons a1 an) k))))))))
-
-;;   (cond ((null? s)
-;;      (values s a))
-;;     (else
-;;      (let ((s1 (car s)))
-;;        (receive (an k) (f1 s1 a)
-;;                 (cond (k
-;;                        (kill-asteroids (cdr s) an))
-;;                       (else
-;;                        (receive (sn an) (kill-asteroids (cdr s) an)
-;;                                 (values (cons s1 sn) an)))))))))
-                          
 
 ;; (let ((asteroids #f) (ship #f) (shots #f))