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example/piano: Add KeyQ

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Hajime Hoshi 2015-01-26 11:33:37 +09:00
parent 17b7969764
commit 880ea55879
1 changed files with 10 additions and 15 deletions
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21
example/piano/main.go
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@ -52,25 +52,20 @@ func addNote(freq float64, vol float64) {
length := len(pcm) * baseFreq / f length := len(pcm) * baseFreq / f
l := make([]int16, length) l := make([]int16, length)
r := make([]int16, length) r := make([]int16, length)
if baseFreq <= freq { j := 0
x := 0 jj := 0
i := 0 for i := 0; i < len(l); i++ {
for _, p := range pcm { p := pcm[j]
x += baseFreq
x %= f
if x < baseFreq {
l[i] = int16(p * vol * math.MaxInt16) l[i] = int16(p * vol * math.MaxInt16)
r[i] = l[i] r[i] = l[i]
i++ jj += f
} j = jj / baseFreq
}
} else {
// Not implemented
} }
audio.Play(-1, l, r) audio.Play(-1, l, r)
} }
var keys = []ebiten.Key{ var keys = []ebiten.Key{
ebiten.KeyQ,
ebiten.KeyA, ebiten.KeyA,
ebiten.KeyW, ebiten.KeyW,
ebiten.KeyS, ebiten.KeyS,
@ -112,7 +107,7 @@ func update(screen *ebiten.Image) error {
if keyStates[key] != 1 { if keyStates[key] != 1 {
continue continue
} }
addNote(220*math.Exp2(float64(i)/12.0), 1.0) addNote(220*math.Exp2(float64(i-1)/12.0), 1.0)
} }
ebitenutil.DebugPrint(screen, fmt.Sprintf("FPS: %0.2f", ebiten.CurrentFPS())) ebitenutil.DebugPrint(screen, fmt.Sprintf("FPS: %0.2f", ebiten.CurrentFPS()))
return nil return nil