diff options
| author | David Thompson <dthompson2@worcester.edu> | 2019-06-04 17:12:36 -0400 |
|---|---|---|
| committer | David Thompson <dthompson2@worcester.edu> | 2019-06-04 17:12:36 -0400 |
| commit | 9d050e6ba7c40c8ed92aa1eeab7a98d89ca85970 (patch) | |
| tree | 54065f8904533fb9d3c8e894cbdebc3513f0f3dc | |
| parent | 3da34ff5fea10d783711a63d8f53851ce633600d (diff) | |
render: tiled: Add point->tile.
* chickadee/render/tiled.scm (point->tile): New procedure.
* doc/api.texi (Tiled): Document it.
* examples/tiled.scm: Render tile coordinates in bottom-left corner.
| -rw-r--r-- | chickadee/render/tiled.scm | 6 | ||||
| -rw-r--r-- | doc/api.texi | 5 | ||||
| -rw-r--r-- | examples/tiled.scm | 17 |
3 files changed, 25 insertions, 3 deletions
diff --git a/chickadee/render/tiled.scm b/chickadee/render/tiled.scm index 1fbdbe6..e51e3c0 100644 --- a/chickadee/render/tiled.scm +++ b/chickadee/render/tiled.scm @@ -47,6 +47,7 @@ tile-map-properties tile-map-rect tile-map-layer-ref + point->tile animation-frame? animation-frame-tile @@ -194,6 +195,11 @@ (else (loop (+ i 1))))))) +(define (point->tile tile-map x y) + "Translate the pixel coordinates (X, Y) into tile coordinates." + (values (floor (/ x (tile-map-tile-width tile-map))) + (floor (/ y (tile-map-tile-height tile-map))))) + (define (load-tile-map file-name) "Load the Tiled TMX formatted map in FILE-NAME." (define map-directory diff --git a/doc/api.texi b/doc/api.texi index 3ea911b..5d7623b 100644 --- a/doc/api.texi +++ b/doc/api.texi @@ -1612,6 +1612,11 @@ Return the layers of @var{tile-map}. Return the custom properties of @var{tile-map}. @end deffn +@deffn {Procedure} point->tile tile-map x y +Translate the pixel coordinates (@var{x}, @var{y}) into tile +coordinates. +@end deffn + @deffn {Procedure} draw-tile-map tile-map [#:layers] [#:region] @ [#:origin] [#:position] [#:scale] [#:rotation] diff --git a/examples/tiled.scm b/examples/tiled.scm index 5ff2b7f..e6099df 100644 --- a/examples/tiled.scm +++ b/examples/tiled.scm @@ -1,17 +1,23 @@ (use-modules (chickadee) (chickadee math vector) (chickadee math rect) + (chickadee render font) (chickadee render tiled) - (ice-9 match)) + (ice-9 format) + (ice-9 match) + (srfi srfi-11)) (define map #f) (define camera #v(0.0 0.0)) +(define text-position #v(4.0 4.0)) +(define text "0, 0") (define (load) (set! map (load-tile-map "maps/example.tmx"))) (define (draw alpha) - (draw-tile-map map #:position camera)) + (draw-tile-map map #:position camera) + (draw-text text text-position)) (define inc 8.0) (define (key-press key scancode modifiers repeat?) @@ -23,9 +29,14 @@ ('q (abort-game)) (_ #t))) +(define (mouse-move x y x-rel y-rel buttons) + (let-values (((tx ty) (point->tile map x y))) + (set! text (format #f "~d, ~d" tx ty)))) + (run-game #:window-width 320 #:window-height 240 #:window-title "tile map demo" #:load load #:draw draw - #:key-press key-press) + #:key-press key-press + #:mouse-move mouse-move) |