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examples/airship: Improve z values

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This commit is contained in:
Hajime Hoshi 2018-03-12 03:18:07 +09:00
parent a335b0c5a3
commit a36ea971b4
2 changed files with 5 additions and 3 deletions
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6
examples/airship/main.go
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@ -195,12 +195,12 @@ func drawGroundImage(screen *ebiten.Image, ground *ebiten.Image) {
gw, _ := ground.Size()
pw, ph := perspectiveGroundImage.Size()
for j := 0; j < ph; j++ {
// z is in [1.5, 0.01]
// z is in [1, -1]
rate := float64(j) / float64(ph)
z := (1-rate)*1.5 + rate*0.01
z := (1-rate)*1 + rate*-1
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(-float64(pw)/2, 0)
op.GeoM.Scale(1/z, 4) // 4 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.
op.GeoM.Translate(float64(pw)/2, float64(j)/z)
src := image.Rect(0, j, gw, j+1)

2
image.go
View File

@ -439,6 +439,8 @@ func newImageWithScreenFramebuffer(width, height int) *Image {
return i
}
var GuaranteedMaxImageSize = 4096
// MaxImageSize is deprecated as of 1.7.0-alpha. No replacement so far.
//
// TODO: Make this replacement (#541)