Use time.Ticker.

1 files changed, 4 insertions, 3 deletions

diff --git a/pongo.go b/pongo.go
index 01c6a8d..70910ee 100644
--- a/pongo.go
+++ b/pongo.go
@@ -155,7 +155,9 @@ func pong() error {
 	lastFrameTime := time.Now()
 	accumulator := time.Duration(0)
 
-	for {
+	renderRate := time.NewTicker(time.Second / 60)
+	defer renderRate.Stop()
+	for frameStart := range renderRate.C {
 		for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
 			switch t := event.(type) {
 			case *sdl.QuitEvent:
@@ -170,7 +172,6 @@ func pong() error {
 			}
 		}
 
-		frameStart := time.Now()
 		accumulator += frameStart.Sub(lastFrameTime)
 		lastFrameTime = frameStart
 
@@ -271,8 +272,8 @@ func pong() error {
 		}
 
 		renderer.Present()
-		time.Sleep(time.Second/60 - time.Since(frameStart))
 	}
+	panic("unreachable")
 }
 
 func main() {