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Enrich the example

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This commit is contained in:
Hajime Hoshi 2014-12-18 01:38:01 +09:00
parent 0e673670c0
commit 87d49546f3
1 changed files with 20 additions and 3 deletions
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19
example/image/main.go
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@ -31,15 +31,32 @@ const (
type Game struct { type Game struct {
count int count int
horizontalCount int
verticalCount int
gophersTexture *ebiten.Texture gophersTexture *ebiten.Texture
} }
func (g *Game) Update(gr ebiten.GraphicsContext) error { func (g *Game) Update(gr ebiten.GraphicsContext) error {
g.count++ g.count++
if ebiten.IsKeyPressed(ebiten.KeyLeft) {
g.horizontalCount--
}
if ebiten.IsKeyPressed(ebiten.KeyRight) {
g.horizontalCount++
}
if ebiten.IsKeyPressed(ebiten.KeyDown) {
g.verticalCount--
}
if ebiten.IsKeyPressed(ebiten.KeyUp) {
g.verticalCount++
}
w, h := g.gophersTexture.Size() w, h := g.gophersTexture.Size()
geo := ebiten.TranslateGeometry(-float64(w)/2, -float64(h)/2) geo := ebiten.TranslateGeometry(-float64(w)/2, -float64(h)/2)
geo.Concat(ebiten.ScaleGeometry(0.5, 0.5)) scaleX := 0.5 * math.Pow(1.05, float64(g.horizontalCount))
scaleY := 0.5 * math.Pow(1.05, float64(g.verticalCount))
geo.Concat(ebiten.ScaleGeometry(scaleX, scaleY))
geo.Concat(ebiten.RotateGeometry(float64(g.count%720) * 2 * math.Pi / 720))
geo.Concat(ebiten.TranslateGeometry(screenWidth/2, screenHeight/2)) geo.Concat(ebiten.TranslateGeometry(screenWidth/2, screenHeight/2))
clr := ebiten.RotateHue(float64(g.count%180) * 2 * math.Pi / 180) clr := ebiten.RotateHue(float64(g.count%180) * 2 * math.Pi / 180)
ebiten.DrawWholeTexture(gr, g.gophersTexture, geo, clr) ebiten.DrawWholeTexture(gr, g.gophersTexture, geo, clr)