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examples/rotate: Use RunGame

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Updates #1111
This commit is contained in:
Hajime Hoshi 2020-04-12 18:04:52 +09:00
parent d0115f61ae
commit cd4a0ba489
1 changed files with 21 additions and 14 deletions
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35
examples/rotate/main.go
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@ -32,17 +32,18 @@ const (
screenHeight = 240
)
var (
count = 0
type Game struct {
count int
gophersImage *ebiten.Image
)
}
func update(screen *ebiten.Image) error {
count++
if ebiten.IsDrawingSkipped() {
return nil
}
w, h := gophersImage.Size()
func (g *Game) Update(screen *ebiten.Image) error {
g.count++
return nil
}
func (g *Game) Draw(screen *ebiten.Image) {
w, h := g.gophersImage.Size()
op := &ebiten.DrawImageOptions{}
// Move the image's center to the screen's upper-left corner.
@ -52,13 +53,16 @@ func update(screen *ebiten.Image) error {
// Rotate the image. As a result, the anchor point of this rotate is
// the center of the image.
op.GeoM.Rotate(float64(count%360) * 2 * math.Pi / 360)
op.GeoM.Rotate(float64(g.count%360) * 2 * math.Pi / 360)
// Move the image to the screen's center.
op.GeoM.Translate(screenWidth/2, screenHeight/2)
screen.DrawImage(gophersImage, op)
return nil
screen.DrawImage(g.gophersImage, op)
}
func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
return screenWidth, screenHeight
}
func main() {
@ -75,9 +79,12 @@ func main() {
if err != nil {
log.Fatal(err)
}
gophersImage, _ = ebiten.NewImageFromImage(img, ebiten.FilterDefault)
g := &Game{}
g.gophersImage, _ = ebiten.NewImageFromImage(img, ebiten.FilterDefault)
if err := ebiten.Run(update, screenWidth, screenHeight, 2, "Rotate (Ebiten Demo)"); err != nil {
ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
ebiten.SetWindowTitle("Rotate (Ebiten Demo)")
if err := ebiten.RunGame(g); err != nil {
log.Fatal(err)
}
}