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< title > Ebiten example - perspective< / title >
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< a class = "navbar-brand" href = "/" > Ebiten< / a >
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< h2 > Ebiten example - perspective< / h2 >
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< iframe src = "perspective.content.html" width = "640" height = "480" > < / iframe >
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< pre > < code class = "language-go" > // + build example
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package main
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import (
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_ " image/jpeg"
" log"
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" github.com/hajimehoshi/ebiten"
" github.com/hajimehoshi/ebiten/ebitenutil"
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)
const (
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screenWidth = 320
screenHeight = 240
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)
var (
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gophersImage *ebiten.Image
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)
type parts struct {
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image *ebiten.Image
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}
func (p parts) Len() int {
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_, h := p.image.Size()
return h
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}
func (p parts) Dst(i int) (x0, y0, x1, y1 int) {
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w, h := p.image.Size()
width := w + i*3/4
x := ((h - i) * 3 / 4) / 2
return x, i, x + width, i + 1
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}
func (p parts) Src(i int) (x0, y0, x1, y1 int) {
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w, _ := p.image.Size()
return 0, i, w, i + 1
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}
func update(screen *ebiten.Image) error {
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op := & ebiten.DrawImageOptions{
ImageParts: & parts{gophersImage},
}
w, h := gophersImage.Size()
maxWidth := float64(w) + float64(h)*0.75
op.GeoM.Translate(-maxWidth/2, -float64(h)/2)
op.GeoM.Translate(screenWidth/2, screenHeight/2)
if err := screen.DrawImage(gophersImage, op); err != nil {
return err
}
return nil
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}
func main() {
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var err error
gophersImage, _, err = ebitenutil.NewImageFromFile(" _resources/images/gophers.jpg" , ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
if err := ebiten.Run(update, screenWidth, screenHeight, 2, " Perspective (Ebiten Demo)" ); err != nil {
log.Fatal(err)
}
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}
< / code > < / pre >
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< p > © 2013 Hajime Hoshi< / p >
< 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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