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example/sprites: Speed optimization

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This commit is contained in:
Hajime Hoshi 2015-01-17 00:33:52 +09:00
parent 8564ba8541
commit 952f6be822
1 changed files with 5 additions and 7 deletions
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10
example/sprites/main.go
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@ -30,6 +30,8 @@ const (
var (
ebitenImage *ebiten.Image
ebitenImageWidth = 0
ebitenImageHeight = 0
)
type Sprite struct {
@ -67,11 +69,6 @@ func (s *Sprite) Dst() (x0, y0, x1, y1 int) {
return s.x, s.y, s.x + w, s.y + h
}
func (s *Sprite) Src() (x0, y0, x1, y1 int) {
w, h := s.image.Size()
return 0, 0, w, h
}
type Sprites []*Sprite
func (s Sprites) Update() {
@ -89,7 +86,7 @@ func (s Sprites) Dst(i int) (x0, y0, x1, y1 int) {
}
func (s Sprites) Src(i int) (x0, y0, x1, y1 int) {
return s[i].Src()
return 0, 0, ebitenImageWidth, ebitenImageHeight
}
var sprites = make(Sprites, 10000)
@ -113,6 +110,7 @@ func main() {
if err != nil {
log.Fatal(err)
}
ebitenImageWidth, ebitenImageHeight = ebitenImage.Size()
for i, _ := range sprites {
w, h := ebitenImage.Size()
x, y := rand.Intn(screenWidth-w), rand.Intn(screenHeight-h)