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  <h2>Ebiten example - rotate</h2>
  <iframe src="rotate.content.html" width="640" height="480"></iframe>
  <div class="card"><pre class="card-body"><code class="language-go">// &#43;build example

package main

import (
        _ &#34;image/jpeg&#34;
        &#34;log&#34;
        &#34;math&#34;

        &#34;github.com/hajimehoshi/ebiten&#34;
        &#34;github.com/hajimehoshi/ebiten/ebitenutil&#34;
)

const (
        screenWidth  = 320
        screenHeight = 240
)

var (
        count        = 0
        gophersImage *ebiten.Image
)

func update(screen *ebiten.Image) error {
        count&#43;&#43;
        if ebiten.IsRunningSlowly() {
                return nil
        }
        w, h := gophersImage.Size()
        op := &amp;ebiten.DrawImageOptions{}

        // Move the image&#39;s center to the screen&#39;s upper-left corner.
        // This is a prepartion for rotating. When geometry matrices are applied,
        // the origin point is the upper-left corner.
        op.GeoM.Translate(-float64(w)/2, -float64(h)/2)

        // 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)

        // Move the image to the screen&#39;s center.
        op.GeoM.Translate(screenWidth/2, screenHeight/2)
        screen.DrawImage(gophersImage, op)
        return nil
}

func main() {
        var err error
        gophersImage, _, err = ebitenutil.NewImageFromFile(&#34;_resources/images/gophers.jpg&#34;, ebiten.FilterDefault)
        if err != nil {
                log.Fatal(err)
        }
        if err := ebiten.Run(update, screenWidth, screenHeight, 2, &#34;Rotate (Ebiten Demo)&#34;); err != nil {
                log.Fatal(err)
        }
}
</code></pre></div>

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