mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 13:07:26 +01:00
74 lines
2.0 KiB
HTML
74 lines
2.0 KiB
HTML
<!DOCTYPE html>
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<link rel="shortcut icon" href="../favicon.png" type="image/png" >
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<link rel="icon" href="../favicon.png" type="image/png" >
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<title>Ebiten example - rotate</title>
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<link rel="stylesheet" href="/stylesheets/bootstrap.min.css">
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<link rel="stylesheet" href="/stylesheets/ebiten.css">
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<header class="navbar"><div class="container">
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<div class="navbar-header">
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<a class="navbar-brand" href="/">Ebiten</a>
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</div>
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</header>
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<main><div class="container">
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<h1>Ebiten example - rotate</h1>
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<iframe src="rotate.content.html" width="640" height="480"></iframe>
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<pre><code>// +build example
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package main
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import (
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_ "image/jpeg"
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"log"
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"math"
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"github.com/hajimehoshi/ebiten"
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"github.com/hajimehoshi/ebiten/ebitenutil"
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)
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const (
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screenWidth = 320
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screenHeight = 240
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)
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var (
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count int
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gophersImage *ebiten.Image
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)
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func update(screen *ebiten.Image) error {
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count++
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w, h := gophersImage.Size()
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op := &ebiten.DrawImageOptions{}
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op.GeoM.Translate(-float64(w)/2, -float64(h)/2)
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op.GeoM.Rotate(float64(count%360) * 2 * math.Pi / 360)
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op.GeoM.Translate(screenWidth/2, screenHeight/2)
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if err := screen.DrawImage(gophersImage, op); err != nil {
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return err
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}
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return nil
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}
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func main() {
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var err error
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gophersImage, _, err = ebitenutil.NewImageFromFile("_resources/images/gophers.jpg", ebiten.FilterNearest)
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if err != nil {
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log.Fatal(err)
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}
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if err := ebiten.Run(update, screenWidth, screenHeight, 2, "Rotate (Ebiten Demo)"); err != nil {
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log.Fatal(err)
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}
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}
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</code></pre>
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</div></main>
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<footer><div class="container">
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<p>© 2013 Hajime Hoshi</p>
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<p>Code is licensed under <a href="https://github.com/hajimehoshi/ebiten/blob/master/LICENSE">Apache License 2.0</a>.</p>
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<p>The content of this page is licensed under <a href="https://creativecommons.org/licenses/by/4.0/">the Creative Commons Attribution 4.0 License</a>.</p>
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</div></footer>
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