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(use-modules (figl gl)
(srfi srfi-1)
(srfi srfi-9)
(srfi srfi-42)
(ice-9 format)
(2d sprite)
(2d game-loop)
(2d window)
(2d vector)
(2d input)
(2d helpers))
;;;
;;; Orthogonal tile map example
;;;
;; This is a quick and dirty tile map implementation. No fancy map
;; loading. Just a hardcoded tile map that demonstrates the
;; split-texture procedure.
;; tiles is a 2d array of texture regions.
(define-record-type <map-layer>
(make-map-layer width height tile-width tile-height tiles)
map-layer?
(width map-layer-width)
(height map-layer-height)
(tile-width map-layer-tile-width)
(tile-height map-layer-tile-height)
(tiles map-layer-tiles))
(define draw-map-layer
(let ((batch (make-sprite-batch)))
(lambda (layer)
(with-sprite-batch batch
(do-ec (: y (map-layer-height layer))
(: x (map-layer-width layer))
(let ((tile (array-ref (map-layer-tiles layer) y x)))
(sprite-batch-draw (texture-region-texture tile)
(* x (map-layer-tile-width layer))
(* y (map-layer-tile-height layer))
(texture-region-width tile)
(texture-region-height tile)
#:u (texture-region-u tile)
#:v (texture-region-v tile)
#:u2 (texture-region-u2 tile)
#:v2 (texture-region-v2 tile))))))))
;; A small 8x8 array of tile indices.
(define map-width 8)
(define map-height 8)
(define map-tiles
#2u32((00 01 01 01 01 01 01 02)
(16 17 17 17 17 17 17 18)
(16 17 17 17 17 17 17 18)
(16 17 17 48 49 17 17 18)
(16 17 17 64 65 17 17 18)
(16 17 17 17 17 17 17 18)
(16 17 17 17 17 17 17 18)
(32 33 33 33 33 33 33 34)))
(define tile-width 32)
(define tile-height 32)
(define map #f)
(define (tiles->texture-regions width height tileset tiles)
(define (texture-region-at x y)
(vector-ref tileset (array-ref tiles y x)))
(let ((regions (list-ec (: y height)
(list-ec (: x width)
(texture-region-at x y)))))
(list->array 2 regions)))
(define (key-down key mod unicode)
(cond ((any-equal? key (keycode escape) (keycode q))
(close-window)
(quit))))
(define (render)
(with-gl-push-matrix
(gl-translate 100 100 0)
(draw-map-layer map)))
(define window-width 800)
(define window-height 600)
(set-key-down-callback (lambda (key mod unicode) (key-down key mod unicode)))
(set-render-callback (lambda () (render)))
(open-window window-width window-height)
;; Load tileset and build map layer
(let* ((texture (load-texture "images/tiles.png"))
(tileset (split-texture texture 32 32)))
(set! map (make-map-layer map-width map-height tile-width tile-height
(tiles->texture-regions map-width
map-height
tileset
map-tiles))))
(run-game-loop)
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