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(use-modules (chickadee)
(chickadee math matrix)
(chickadee math rect)
(chickadee math vector)
(chickadee graphics color)
(chickadee graphics sprite)
(chickadee graphics text)
(chickadee graphics texture)
(chickadee scripting)
(ice-9 format)
(ice-9 match)
(srfi srfi-1)
(statprof))
(define texture #f)
(define batch #f)
(define start-time 0.0)
(define avg-frame-time 16)
(define num-sprites 5000)
(define sprites
(list-tabulate num-sprites
(lambda (n)
(list (rect (* (random:uniform) 640.0)
(* (random:uniform) 480.0)
16.0 16.0)
(vec2 (* (- (random:uniform) 0.5) 0.5)
(* (- (random:uniform) 0.5) 0.5))))))
(define matrix (make-identity-matrix4))
(define (stats-message)
(format #f "sprites: ~d fps: ~1,2f"
num-sprites
(/ 1.0 avg-frame-time)))
(define stats-text (stats-message))
(define (load)
(set! *random-state* (random-state-from-platform))
(set! texture (load-image "images/shot.png"))
(set! batch (make-sprite-batch texture #:capacity num-sprites))
(script
(forever
(sleep 60)
(set! stats-text (pk 'stats (stats-message))))))
(define stats-text-pos (vec2 4.0 464.0))
(define (draw alpha)
(sprite-batch-clear! batch)
(for-each (match-lambda
((r v)
(set-rect-x! r (+ (rect-x r) (vec2-x v)))
(set-rect-y! r (+ (rect-y r) (vec2-y v)))
(sprite-batch-add* batch r matrix)))
sprites)
(draw-sprite-batch batch)
(draw-text stats-text stats-text-pos #:color black)
(let ((current-time (elapsed-time)))
(set! avg-frame-time
(+ (* (- current-time start-time) 0.1)
(* avg-frame-time 0.9)))
(set! start-time current-time)))
(define (update dt)
(update-agenda 1))
(run-game #:load load #:draw draw #:update update
#:window-title "sprite batch example")
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