make other avoid each other, update readme and remove pk's

README.org

@@ -36,7 +36,7 @@ let the _others_ fall in so you can pass over their head.
 So now, go out, collect the keys and maintain a healthy diet!
 
 
-* Game Plan [11/18]
+* Game Plan [12/20]
 
  - [X] start project organization
  - [X] select some assets to start with
@@ -53,6 +53,8 @@ So now, go out, collect the keys and maintain a healthy diet!
  - [ ] automate upload to itch.io
  - [X] create other's AI
  - [X] add keys and portal
+ - [X] make other avoid each other
+ - [ ] Detect success reaching the goal and progress to next level
  - [ ] add foods and bloat indicator
  - [ ] scale hero waist related to bloat level
  - [ ] create more levels
@@ -75,8 +77,6 @@ Untar the filename, enter the newly created folder and launch `bloatrunner/bloat
 #+END_SRC
 
 
-
-
 *** TODO make an upload script which cleans up the filename
 
 The current filename contains the GUIX UUID which is ugly and not very

game/model/hero.scm

@@ -58,9 +58,8 @@
 (define (blocked-by-door? level keys position)
   "return true if the hero is blocked by a door"
   (let ((door-position (level-find-goal level)))
-    (pk 'blocked-by-door? keys (null? keys) position 
     (and  (collides? position door-position)
-              (not (null? keys))))))
+          (not (null? keys)))))
 
 (define (hero-update hero level inputs keys dt)
   (let ((new-runner (runner-update (hero-runner hero) level inputs dt)))

game/model/key.scm

@@ -21,7 +21,7 @@
   )
 
 (define (key-collides? key position)
-  (< (pk "key distance" (vec2-magnitude (vec2- (key-position key) position))) 4))
+  (< (vec2-magnitude (vec2- (key-position key) position)) 4))
 
 
 (define (keys-load level)

game/model/other.scm

@@ -73,10 +73,31 @@
         #t                              ;; if not on ladder, it's safe
         )))
 
+(define (other-distance a b)
+  (vec2-magnitude (vec2- (other-position a) (other-position b))))
+
+;; find closest other to given other
+(define (find-closest-other other others)
+  (let ((other-others (remove (lambda (o) (equal? o other)) others)))
+    (fold (lambda (a b)
+            (if (< (other-distance a other) (other-distance b other)) a b))
+          (car other-others)
+          (cdr other-others))))
+
 ;; Generate inputs for the other based on the level and
 ;; the hero and other others.
 (define (determine-actions other level hero others)
-  (let ((actions '()))
+  (let ((actions '())
+        (closest (find-closest-other other others)))
+    ;; keep distance from each other
+    (if (< (other-distance closest other) (* 2 level-cell-size))
+        (let ((diff (vec2- (other-position closest) (other-position other))))
+          (when (< (vec2-x diff) 0) (set! actions (cons 'right actions)))
+          (when (> (vec2-x diff) 0) (set! actions (cons 'left actions)))
+          (when (< (vec2-y diff) 0) (set! actions (cons 'up actions)))
+          (when (> (vec2-y diff) 0) (set! actions (cons 'down actions)))))
+    
+    ;; move towards hero without falling off ladders
     (when  (safe-ladder-position? (other-position other) level) 
       (when (< (hero-x hero) (other-x other))
         (set! actions (cons 'left actions)))
@@ -86,10 +107,13 @@
       (set! actions (cons 'down actions)))
     (when (> (hero-y hero) (other-y other))
       (set! actions (cons 'up actions)))
+    
     actions))
   
-(define (other-update other level hero others dt)
-(let ((inputs (determine-actions other level hero others)))
+  
+
+  (define (other-update other level hero others dt)
+    (let ((inputs (determine-actions other level hero others)))
       (other-with-runner other (runner-update (other-runner other) level inputs dt))))
 
 

game/model/runner.scm

@@ -72,7 +72,7 @@
 (define (safe-move level pos move)
   (let ((new-pos (vec2+ pos move)))
     (if (level-tile-blocked? level new-pos)
-        (pk "snap position " pos "to" (round-position pos)) ;; snap to grid on collision with hard scenery
+        (round-position pos) ;; snap to grid on collision with hard scenery
         new-pos
         )))
 

game/render/key.scm

@@ -15,7 +15,6 @@
    (texture-atlas-ref tile-atlas key-index)
    (vec2+ (key-position key) (vec2 -8 0))))
 
-
 (define (render-goal keys goal-position)
   (let ((goal-index (if (null? keys) open-goal-index closed-goal-index)))
     (draw-sprite