Let the user crash out of the road

2 files changed, 56 insertions, 10 deletions

diff --git a/TODO.org b/TODO.org
new file mode 100644
index 0000000..69d8e4a
--- /dev/null
+++ b/TODO.org
@@ -0,0 +1,13 @@
+* Stuff left to do
+
+** TODO Detect when player leaves the road
+** TODO Add non-player cars onto the road
+** TODO Detect collision with other vehicles
+** TODO Add weapon to player car
+*** TODO Make weapon a power-up
+*** TODO Make weapon use limited (bullet? time?)
+** TODO Add graphical speedometer (look at knight rider)
+** TODO Improve visuals
+** TODO Add start menu
+** TODO Add music
+** TODO Add sound effects
diff --git a/turbo.scm b/turbo.scm
index 47f9265..eb7f656 100644
--- a/turbo.scm
+++ b/turbo.scm
@@ -11,11 +11,13 @@
 (define road-start-y 80)
 (define road-section-position 0)
 (define road (load-tileset "road.png" lane-length lane-height))
-(define grass (load-image "grass.png"))
-(define grass-height 96)
+(define road-num-lanes 5)
+(define road-end-y (+ road-start-y (* road-num-lanes lane-height)))
 (define road-top (texture-atlas-ref road 2))
 (define road-bottom (texture-atlas-ref road 0))
 (define road-lane (texture-atlas-ref road 1))
+(define grass (load-image "grass.png"))
+(define grass-height 96)
 
 (define vehicle-height 45)
 (define vehicle-length 100)
@@ -28,7 +30,7 @@
 (define player-max-speed 20)
 (define player-speed player-min-speed)
 
-(define load-complete #f)
+(define game-over #f)
 
 ;;;; Game functions
 
@@ -66,25 +68,56 @@
 	(+ (lane-y 3)
 	   (/ (- lane-height vehicle-height) 2))))
 
+(define player-rotation 0)
+
+(define (player-on-road?)
+  (and (> (vec2-y player-position) road-start-y)
+       (< (+ (vec2-y player-position) vehicle-height) road-end-y)))
+
+(define (off-road-player-top)
+  (set! player-rotation 1)
+  (set! player-position (vec2+ player-position (vec2 0 30)))
+  (set! player-speed 0))
+(define (off-road-player-bottom)
+  (set! player-rotation -1)
+  (set! player-position (vec2+ player-position (vec2 0 -10)))
+  (set! player-speed 0))
+
+(define (off-road-player)
+  "Moves the player off-road"
+  (if (> (vec2-y player-position) road-start-y)
+      (off-road-player-top)
+      (off-road-player-bottom)))
+
 ;;;; Chickadee hooks
 
 (define (update interval)
-  (set! road-section-position
-	(if (< road-section-position (* lane-length -1))
-	    (- (+ road-section-position lane-length) player-speed)
-	    (- road-section-position player-speed)))
+  (if (not game-over)
+      (begin
+	(if (not (player-on-road?))
+	    (begin
+	      (off-road-player)
+	      (set! game-over #t)))
 
-  (set! player-position (vec2+ player-position player-velocity)))
+	(set! road-section-position
+	      (if (< road-section-position (* lane-length -1))
+		  (- (+ road-section-position lane-length) player-speed)
+		  (- road-section-position player-speed)))
+
+	(set! player-position (vec2+ player-position player-velocity)))))
 
 (define (draw alpha)
-  (draw-road road-section-position road-start-y 5)
+  (draw-road road-section-position road-start-y road-num-lanes)
   (draw-text "Turbo Racers!"
 	     (vec2 260.0 (- (window-height (current-window)) 25)))
   
   (draw-text (format #f "Speed: ~smph" (* player-speed 5))
 	     (vec2 450.0 20.0))
 
-  (draw-sprite player-car player-position))
+  (draw-sprite player-car player-position #:rotation player-rotation)
+  
+  (if game-over
+      (draw-text "GAME OVER" (vec2 260 (/ (window-width (current-window)) 2)))))