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examples/airship: Introduce repeatedGophersImage

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This commit is contained in:
Hajime Hoshi 2016-07-18 17:44:25 +09:00
parent dc159cb37c
commit aa96822ce5
1 changed files with 26 additions and 14 deletions
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40
examples/airship/main.go
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@ -40,9 +40,10 @@ var (
y16: 16 * 200,
angle: maxAngle * 3 / 4,
}
gophersImage *ebiten.Image
groundImage *ebiten.Image
fogImage *ebiten.Image
gophersImage *ebiten.Image
repeatedGophersImage *ebiten.Image
groundImage *ebiten.Image
fogImage *ebiten.Image
)
type player struct {
@ -124,17 +125,13 @@ func updateGroundImage(ground *ebiten.Image) error {
a := thePlayer.Angle()
gw, gh := ground.Size()
w, h := gophersImage.Size()
for j := -2; j <= 2; j++ {
for i := -2; i <= 2; i++ {
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(float64(-x16)/16, float64(-y16)/16)
op.GeoM.Translate(float64(w*i), float64(h*j))
op.GeoM.Rotate(float64(-a)*2*math.Pi/maxAngle + math.Pi*3.0/2.0)
op.GeoM.Translate(float64(gw)/2, float64(gh)-32)
if err := ground.DrawImage(gophersImage, op); err != nil {
return err
}
}
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(float64(-x16)/16, float64(-y16)/16)
op.GeoM.Translate(float64(-w*2), float64(-h*2))
op.GeoM.Rotate(float64(-a)*2*math.Pi/maxAngle + math.Pi*3.0/2.0)
op.GeoM.Translate(float64(gw)/2, float64(gh)-32)
if err := ground.DrawImage(repeatedGophersImage, op); err != nil {
return err
}
return nil
}
@ -230,6 +227,21 @@ func main() {
if err != nil {
log.Fatal(err)
}
w, h := gophersImage.Size()
const repeat = 5
repeatedGophersImage, err = ebiten.NewImage(w*repeat, h*repeat, ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
for j := 0; j < repeat; j++ {
for i := 0; i < repeat; i++ {
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(float64(w*i), float64(h*j))
if err := repeatedGophersImage.DrawImage(gophersImage, op); err != nil {
log.Fatal(err)
}
}
}
groundWidth := screenWidth + 70
groundImage, err = ebiten.NewImage(groundWidth, screenHeight*2/3+50, ebiten.FilterNearest)
if err != nil {