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examples/edge: Update to use ImageParts

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This commit is contained in:
Hajime Hoshi 2017-02-06 07:58:14 +09:00
parent 6929c70c06
commit d216a04cb6
1 changed files with 20 additions and 1 deletions
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21
examples/edge/main.go
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@ -38,9 +38,27 @@ var (
angle = 0
)
type parts struct {
image *ebiten.Image
}
func (p *parts) Len() int {
return 1
}
func (p *parts) Src(index int) (int, int, int, int) {
w, h := p.image.Size()
return 0, 0, w, h / 2
}
func (p *parts) Dst(index int) (int, int, int, int) {
w, h := p.image.Size()
return 0, 0, w, h / 2
}
func update(screen *ebiten.Image) error {
if ebiten.IsKeyPressed(ebiten.KeyLeft) {
angle--
angle += 359
}
if ebiten.IsKeyPressed(ebiten.KeyRight) {
angle++
@ -50,6 +68,7 @@ func update(screen *ebiten.Image) error {
return err
}
op := &ebiten.DrawImageOptions{}
op.ImageParts = &parts{colorImage}
op.GeoM.Translate(-float64(colorImageWidth)/2, -float64(colorImageHeight)/2)
op.GeoM.Rotate(float64(angle) * math.Pi / 180)
op.GeoM.Scale(4, 4)