Start extracting code into modules

1 files changed, 43 insertions, 0 deletions

diff --git a/turbo/vehicles.scm b/turbo/vehicles.scm
new file mode 100644
index 0000000..618d808
--- /dev/null
+++ b/turbo/vehicles.scm
@@ -0,0 +1,43 @@
+(define-module (turbo vehicles)
+  #:use-module (srfi srfi-9)
+  #:export (make-vehicle
+	    make-inactive-vehicle
+	    vehicle-height
+	    vehicle-length
+	    vehicle-steering-speed
+	    vehicle-id
+	    vehicle-sprite
+	    vehicle-position
+	    vehicle-speed
+	    vehicle-active?
+	    set-vehicle-position!
+	    set-vehicle-speed!
+	    set-vehicle-active!
+	    vehicle-hitbox
+	    vehicle-safety-distance?))
+
+(define vehicle-height 45)
+(define vehicle-length 100)
+(define vehicle-steering-speed 4.0)
+
+(define-record-type <vehicle>
+  (make-vehicle id sprite position speed active?)
+  vechicle?
+  (id vehicle-id)
+  (sprite vehicle-sprite)
+  (position vehicle-position set-vehicle-position!)
+  (speed vehicle-speed set-vehicle-speed!)
+  (active? vehicle-active? set-vehicle-active!))
+
+(define (make-inactive-vehicle id tile initial-position)
+  (make-vehicle id tile initial-position 4 #f))
+
+(define (vehicle-hitbox vehicle-pos)
+  (rect (vec2-x vehicle-pos) (vec2-y vehicle-pos) vehicle-length vehicle-height))
+
+(define (vehicle-safety-distance? vehicle1 vehicle2)
+  (let ((vehicle1-x (vec2-x (vehicle-position vehicle1)))
+	(vehicle2-x (vec2-x (vehicle-position vehicle2))))
+    (> vehicle2-x
+       (+ (* 2 vehicle-length)
+	  vehicle1-x))))