diff options
| -rw-r--r-- | sly/sprite.scm | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/sly/sprite.scm b/sly/sprite.scm index f92687f..59583db 100644 --- a/sly/sprite.scm +++ b/sly/sprite.scm @@ -24,17 +24,20 @@ (define-module (sly sprite) #:use-module (srfi srfi-1) - #:use-module (srfi srfi-9) - #:use-module (srfi srfi-9 gnu) + #:use-module (srfi srfi-26) #:use-module (gl) #:use-module (gl contrib packed-struct) #:use-module ((sdl sdl) #:prefix SDL:) #:use-module (sly config) + #:use-module (sly agenda) + #:use-module (sly helpers) #:use-module (sly math) #:use-module (sly mesh) #:use-module (sly shader) + #:use-module (sly signal) #:use-module (sly texture) - #:export (make-sprite)) + #:export (make-sprite + make-animated-sprite)) ;;; ;;; Sprites @@ -61,3 +64,23 @@ (vector s2 t1) (vector s2 t2) (vector s1 t2))))))) + +(define* (make-animated-sprite textures frame-duration #:optional #:key + (loop? #t) + (shader (load-default-shader))) + "Return a signal that iterates through the list TEXTURES and +displays them each for FRAME-DURATION ticks. The optional LOOP? flag +specifies if the animation should play once or indefinitely. +Optionally, a SHADER can be specified, otherwise the default mesh +shader is used." + (let ((frames (map (cut make-sprite <> #:shader shader) textures))) + (signal-generator + (define (animate) + (for-each (lambda (frame) + (yield frame) + (wait frame-duration)) + frames)) + + (if loop? + (forever (animate)) + (animate))))) |