45 lines
1.6 KiB
Scheme
45 lines
1.6 KiB
Scheme
(define-module (game level)
|
|
#:use-module (game actors)
|
|
#:use-module (goblins core)
|
|
#:use-module (hoot bytevectors)
|
|
#:use-module (ice-9 match)
|
|
#:use-module (srfi srfi-9)
|
|
#:export (make-level
|
|
level?
|
|
level-background
|
|
level-actor
|
|
level-player))
|
|
|
|
;; Client-side rendering info coupled with level actor that contains
|
|
;; game state.
|
|
(define-record-type <level>
|
|
(%make-level background actor player)
|
|
level?
|
|
(background level-background)
|
|
(actor level-actor)
|
|
(player level-player))
|
|
|
|
(define (make-level width height background objects)
|
|
(let ((level* (spawn ^level width height))
|
|
(len (bytevector-length objects)))
|
|
;; Parsed packed object data and spawn objects, making special
|
|
;; note of the player.
|
|
(let lp ((i 0) (player #f))
|
|
(if (< i len)
|
|
(let* ((x (bytevector-u8-ref objects i))
|
|
(y (bytevector-u8-ref objects (+ i 1)))
|
|
(id (bytevector-u8-ref objects (+ i 2)))
|
|
(obj (match id
|
|
(1 (spawn ^wall x y 'brick))
|
|
(2 (spawn ^wall x y 'copper))
|
|
(3 (spawn ^player x y))
|
|
(4 (spawn ^exit x y))
|
|
(5 (spawn ^block x y 'copper))
|
|
(6 (spawn ^block x y 'crate))
|
|
(7 (spawn ^clock-emitter x y 4))
|
|
(id (error "invalid level object" id)))))
|
|
($ level* 'add-object obj)
|
|
(if (= id 3) ; player-spawn
|
|
(lp (+ i 3) obj)
|
|
(lp (+ i 3) player)))
|
|
(%make-level background level* player)))))
|