engine/drawing.scm

@@ -258,13 +258,19 @@
   (assert ((conjoin integer? positive?) thickness))
   (assert (boolean? filled))
   (assert (color? color))
-  (when filled
-    (draw-rectangle
-     (number->integer (v-x pos-vec))
-     (number->integer (v-y pos-vec))
-     width
-     height
-     (use-color color))))
+  (if filled
+      (draw-rectangle
+       (number->integer (v-x pos-vec))
+       (number->integer (v-y pos-vec))
+       width
+       height
+       (use-color color))
+      (draw-rectangle-lines
+       (number->integer (v-x pos-vec))
+       (number->integer (v-y pos-vec))
+       width
+       height
+       (use-color color))))
 
 (define (draw-text-2d pos-vec text size tint)
   (assert (vec2? pos-vec))
@@ -276,4 +282,4 @@
 	     (number->integer (v-y pos-vec))
 	     size
 	     (use-color tint)))
-)
+  )

samples/tic-tac-toe.scm

@@ -85,25 +85,83 @@
 	      ((button-on-click btn)))))
 	buttons)))))
 
+(define grid '((0 0 0)
+	       (0 0 0)
+	       (0 0 0)))
+
+(define turn 'player) ;; Either 'player or 'bot
+
+(define grid-square-size (vec 150 150))
+
+(define padding (vec 50 50))
+
+(define draw-grid-squares
+  (make-system
+   'draw-grid-squares
+   0
+   'entity
+   '(<screen-transform> <grid-square>)
+   (lambda (_ transform sq)
+     (let ((check (list-ref (list-ref grid (g-y sq)) (g-x sq))))
+       (push-render-object 'screen
+			   0
+			   (lambda ()
+			     (draw-text-2d
+			      (v+ (v/ grid-square-size 4) (position transform))
+			      (cond
+			       ((= check 1) "X")
+			       ((= check 2) "O")
+			       (else ""))
+			      64
+			      (make-color 0 0 0 1))))))))
+
+(define-record-type <grid-square>
+  (make-g-s x y)
+  grid-square?
+  (x g-x)
+  (y g-y))
+
+(define (make-grid-square x y)
+  (entity
+   (make-g-s x y)
+   (make-screen-transform
+    (v+ padding (v* (vec x y) grid-square-size))
+    (vec 0 0)
+    0
+    (vec 1 1)
+    'center
+    '())
+   (make-visual-2d
+    (make-rectangle-2d
+     (vec 0 0)
+     (v-x grid-square-size)
+     (v-y grid-square-size)
+     #f
+     10)
+    (make-color 0 0 0 1)
+    0)
+   (make-button-region
+    (vec 0 0)
+    grid-square-size
+    (lambda ()
+      (set! (list-ref (list-ref grid y) x) (+ 1 (list-ref (list-ref grid y) x)))))))
+
 (define (game)
   (scene
-   draw-text-entities
+   draw-rectangles
+   draw-grid-squares
+   click-buttons
+   push-actions
    
-   (entity
-    (make-screen-transform
-     (vec 350 250)
-     (vec 0 0)
-     0
-     (vec 1 1)
-     'center
-     '())
-    (make-visual-2d
-     (make-text-2d
-      (vec 0 0)
-      "You lost the game!"
-      12)
-     (make-color 0 0 0 1)
-     0))))
+   (make-grid-square 0 0)
+   (make-grid-square 1 0)
+   (make-grid-square 2 0)
+   (make-grid-square 0 1)
+   (make-grid-square 1 1)
+   (make-grid-square 2 1)
+   (make-grid-square 0 2)
+   (make-grid-square 1 2)
+   (make-grid-square 2 2)))
 
 (define (main-menu)
   (scene