Refactoring

examples/glut/main.go

@@ -76,21 +76,19 @@ func main() {
 	game := &DemoGame{}
 	device = graphics.NewDevice(screenWidth, screenHeight, screenScale,
 		func(g *graphics.GraphicsContext, offscreen *graphics.Texture) {
-			<-ch
+			ticket := <-ch
 			game.Draw(g, offscreen)
-			ch<- true
+			ch<- ticket
 		})
 
 	go func() {
 		const frameTime = time.Second / 60
-		lastTime := time.Now()
+		tick := time.Tick(frameTime)
 		for {
-			<-ch
+			<-tick
+			ticket := <-ch
 			game.Update()
-			ch<- true
-			now := time.Now()
-			time.Sleep(frameTime - now.Sub(lastTime))
-			lastTime = now
+			ch<- ticket
 		}
 	}()
 	ch<- true

graphics/texture.go

@@ -92,7 +92,3 @@ func NewTextureFromRGBA(image *image.RGBA) *Texture {
 func (texture *Texture) IsAvailable() bool {
 	return texture.id != 0
 }
-
-func init() {
-	// TODO: Initialize OpenGL here?
-}