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docs: Update

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Hajime Hoshi 2018-03-12 03:23:29 +09:00
parent 762fcfc2db
commit e81c83dfe6
1 changed files with 3 additions and 0 deletions
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docs/examples/airship.html
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@ -213,6 +213,9 @@ func drawGroundImage(screen *ebiten.Image, ground *ebiten.Image) {
// z is in [1, -1] // z is in [1, -1]
rate := float64(j) / float64(ph) rate := float64(j) / float64(ph)
z := (1-rate)*1 + rate*-1 z := (1-rate)*1 + rate*-1
if z <= 0 {
break
}
op := &ebiten.DrawImageOptions{} op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(-float64(pw)/2, 0) op.GeoM.Translate(-float64(pw)/2, 0)
op.GeoM.Scale(1/z, 8) // 8 is an arbitrary number not to make empty lines. op.GeoM.Scale(1/z, 8) // 8 is an arbitrary number not to make empty lines.