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example/piano: Draw piano keys (#106)

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Hajime Hoshi 2015-01-29 03:22:36 +09:00
parent 706935d9b9
commit b474c34965
1 changed files with 26 additions and 0 deletions
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26
example/piano/main.go
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@ -18,7 +18,9 @@ import (
"fmt" "fmt"
"github.com/hajimehoshi/ebiten" "github.com/hajimehoshi/ebiten"
"github.com/hajimehoshi/ebiten/ebitenutil" "github.com/hajimehoshi/ebiten/ebitenutil"
"github.com/hajimehoshi/ebiten/example/common"
"github.com/hajimehoshi/ebiten/exp/audio" "github.com/hajimehoshi/ebiten/exp/audio"
"image/color"
"log" "log"
"math" "math"
) )
@ -109,6 +111,30 @@ func update(screen *ebiten.Image) error {
} }
addNote(220*math.Exp2(float64(i-1)/12.0), 1.0) addNote(220*math.Exp2(float64(i-1)/12.0), 1.0)
} }
screen.Fill(color.RGBA{0x80, 0x80, 0xc0, 0xff})
whiteKeys := []string{"A", "S", "D", "F", "G", "H", "J", "K", "L"}
width := 24
y := 48
for i, k := range whiteKeys {
x := i*width + 36
height := 112
screen.DrawFilledRect(x, y, width-1, height, color.White)
common.ArcadeFont.DrawText(screen, k, x+8, y+height-16, 1, color.Black)
}
blackKeys := []string{"Q", "W", "", "R", "T", "", "U", "I", "O"}
for i, k := range blackKeys {
if k == "" {
continue
}
x := i*width + 24
height := 64
screen.DrawFilledRect(x, y, width-1, height, color.Black)
common.ArcadeFont.DrawText(screen, k, x+8, y+height-16, 1, color.White)
}
ebitenutil.DebugPrint(screen, fmt.Sprintf("FPS: %0.2f", ebiten.CurrentFPS())) ebitenutil.DebugPrint(screen, fmt.Sprintf("FPS: %0.2f", ebiten.CurrentFPS()))
return nil return nil
} }