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(define-module (turbo vehicles)
#:use-module (srfi srfi-9)
#:use-module (chickadee math vector)
#:use-module (chickadee math rect)
#:export (make-vehicle
make-inactive-vehicle
vehicle-height
vehicle-length
vehicle-steering-speed
vehicle-id
vehicle-sprite
vehicle-position
vehicle-speed
vehicle-active?
vehicle-inactive?
set-vehicle-position!
set-vehicle-speed!
set-vehicle-active!
vehicle-hitbox
vehicle-safety-distance?
vehicle-speed-
vehicle-move!
vehicle=))
(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)
(rect (vec2-x (vehicle-position vehicle))
(vec2-y (vehicle-position vehicle))
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))))
(> (abs (- vehicle2-x vehicle1-x))
(+ (* 3 vehicle-length)))))
(define (vehicle-speed- vehicle1 vehicle2)
(- (vehicle-speed vehicle1) (vehicle-speed vehicle2)))
(define (vehicle-move! vehicle translation)
(set-vehicle-position!
vehicle
(vec2+ (vehicle-position vehicle) translation)))
(define (vehicle-inactive? vehicle)
(not (vehicle-active? vehicle)))
(define (vehicle= vehicle1 vehicle2)
(= (vehicle-id vehicle1) (vehicle-id vehicle2)))
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