func update(screen *ebiten.Image) error {
if ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft) {
count++
}
mx, my := ebiten.CursorPosition()
if ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft) {
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(float64(mx), float64(my))
op.ColorM.Scale(1.0, 0.25, 0.25, 1.0)
theta := 2.0 * math.Pi * float64(count%60) / 60.0
op.ColorM.Concat(ebiten.RotateHue(theta))
if err := canvasImage.DrawImage(brushImage, op); err != nil {
return err
}
}
if err := screen.DrawImage(canvasImage, nil); err != nil {
return err
}
if err := ebitenutil.DebugPrint(screen, fmt.Sprintf("(%d, %d)", mx, my)); err != nil {
return err
}
return nil
}
func update(screen *ebiten.Image) error {
if ebiten.IsKeyPressed(ebiten.KeySpace) {
thePlayer.MoveForward()
}
rotated := false
if ebiten.IsKeyPressed(ebiten.KeyRight) {
thePlayer.RotateRight()
rotated = true
}
if ebiten.IsKeyPressed(ebiten.KeyLeft) {
thePlayer.RotateLeft()
rotated = true
}
if !rotated {
thePlayer.Stabilize()
}
if err := screen.Fill(skyColor); err != nil {
return err
}
if err := updateGroundImage(groundImage); err != nil {
return err
}
if err := drawGroundImage(screen, groundImage); err != nil {
return err
}
tutrial := "Space: Move forward\nLeft/Right: Rotate"
msg := fmt.Sprintf("FPS: %0.2f\n%s", ebiten.CurrentFPS(), tutrial)
if err := ebitenutil.DebugPrint(screen, msg); err != nil {
return err
}
return nil
}
func update(screen *ebiten.Image) error {
// TODO: API to get the available, lowest ID
const gamepadID = 0
axes := []string{}
pressedButtons := []string{}
maxAxis := ebiten.GamepadAxisNum(gamepadID)
for a := 0; a < maxAxis; a++ {
v := ebiten.GamepadAxis(gamepadID, a)
axes = append(axes, fmt.Sprintf("%d: %0.6f", a, v))
}
maxButton := ebiten.GamepadButton(ebiten.GamepadButtonNum(gamepadID))
for b := ebiten.GamepadButton(gamepadID); b < maxButton; b++ {
if ebiten.IsGamepadButtonPressed(gamepadID, b) {
pressedButtons = append(pressedButtons, strconv.Itoa(int(b)))
}
}
str := `Gamepad
Axes:
{{.Axes}}
Pressed Buttons: {{.Buttons}}`
str = strings.Replace(str, "{{.Axes}}", strings.Join(axes, "\n "), -1)
str = strings.Replace(str, "{{.Buttons}}", strings.Join(pressedButtons, ", "), -1)
ebitenutil.DebugPrint(screen, str)
return nil
}
func update(screen *ebiten.Image) error {
if ebiten.IsKeyPressed(ebiten.KeyLeft) {
sprites.num -= 20
if sprites.num < MinSprites {
sprites.num = MinSprites
}
}
if ebiten.IsKeyPressed(ebiten.KeyRight) {
sprites.num += 20
if MaxSprites < sprites.num {
sprites.num = MaxSprites
}
}
sprites.Update()
if ebiten.IsRunningSlowly() {
return nil
}
op := &ebiten.DrawImageOptions{
ImageParts: sprites,
}
op.ColorM.Scale(1.0, 1.0, 1.0, 0.5)
if err := screen.DrawImage(ebitenImage, op); err != nil {
return err
}
msg := fmt.Sprintf(`FPS: %0.2f
Num of sprites: %d
Press <- or -> to change the number of sprites`, ebiten.CurrentFPS(), sprites.Len())
if err := ebitenutil.DebugPrint(screen, msg); err != nil {
return err
}
return nil
}
func update(screen *ebiten.Image) error {
drawn := false
mx, my := ebiten.CursorPosition()
if ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft) {
if err := paint(screen, mx, my); err != nil {
return err
}
drawn = true
}
for _, t := range ebiten.Touches() {
x, y := t.Position()
if err := paint(screen, x, y); err != nil {
return err
}
drawn = true
}
if drawn {
count++
}
if err := screen.DrawImage(canvasImage, nil); err != nil {
return err
}
msg := fmt.Sprintf("(%d, %d)", mx, my)
for _, t := range ebiten.Touches() {
x, y := t.Position()
msg += fmt.Sprintf("\n(%d, %d) touch %d", x, y, t.ID())
}
if err := ebitenutil.DebugPrint(screen, msg); err != nil {
return err
}
return nil
}
func update(screen *ebiten.Image) error {
defer func() {
frames++
}()
if frames%30 == 0 {
addNote()
}
ebitenutil.DebugPrint(screen, fmt.Sprintf("FPS: %0.2f", ebiten.CurrentFPS()))
return nil
}
func update(screen *ebiten.Image) error {
for key, _ := range keyStates {
if !ebiten.IsKeyPressed(key) {
keyStates[key] = 0
continue
}
keyStates[key]++
}
d := 0
switch screenScale {
case 1:
d = 32
case 2:
d = 16
}
if keyStates[ebiten.KeyUp] == 1 {
screenHeight += d
}
if keyStates[ebiten.KeyDown] == 1 {
if 16 < screenHeight {
screenHeight -= d
}
}
if keyStates[ebiten.KeyLeft] == 1 {
if 16 < screenWidth {
screenWidth -= d
}
}
if keyStates[ebiten.KeyRight] == 1 {
screenWidth += d
}
if keyStates[ebiten.KeyS] == 1 {
screenScale = 3 - screenScale // Swap 1 and 2
}
ebiten.SetScreenSize(screenWidth, screenHeight)
ebiten.SetScreenScale(screenScale)
screen.Fill(color.RGBA{0x80, 0x80, 0xc0, 0xff})
w, h := gophersImage.Size()
w2, h2 := screen.Size()
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(float64(-w+w2)/2, float64(-h+h2)/2)
if err := screen.DrawImage(gophersImage, op); err != nil {
return err
}
x, y := ebiten.CursorPosition()
msg := fmt.Sprintf(`Press arrow keys to change the window size
Press S key to change the window scale
Cursor: (%d, %d)
FPS: %0.2f`, x, y, ebiten.CurrentFPS())
ebitenutil.DebugPrint(screen, msg)
return nil
}
func update(screen *ebiten.Image) error {
defer func() {
frames++
}()
if frames%30 == 0 {
if err := addNote(); err != nil {
return err
}
}
ebitenutil.DebugPrint(screen, fmt.Sprintf("FPS: %0.2f", ebiten.CurrentFPS()))
if err := audioContext.Update(); err != nil {
return err
}
return nil
}
func update(screen *ebiten.Image) error {
updateInput()
for i, key := range keys {
if keyStates[key] != 1 {
continue
}
addNote(220*math.Exp2(float64(i-1)/12.0), 1.0)
}
screen.Fill(color.RGBA{0x80, 0x80, 0xc0, 0xff})
screen.DrawImage(pianoImage, nil)
ebitenutil.DebugPrint(screen, fmt.Sprintf("FPS: %0.2f", ebiten.CurrentFPS()))
return nil
}
func update(screen *ebiten.Image) error {
theViewport.Move()
if err := updateGroundImage(groundImage); err != nil {
return err
}
if err := drawGroundImage(screen, groundImage); err != nil {
return err
}
msg := fmt.Sprintf("FPS: %0.2f", ebiten.CurrentFPS())
if err := ebitenutil.DebugPrint(screen, msg); err != nil {
return err
}
return nil
}
func update(screen *ebiten.Image) error {
const l = screenWidth * screenHeight
for i := 0; i < l; i++ {
x := randInstance.next()
noiseImage.Pix[4*i] = uint8(x >> 24)
noiseImage.Pix[4*i+1] = uint8(x >> 16)
noiseImage.Pix[4*i+2] = uint8(x >> 8)
noiseImage.Pix[4*i+3] = 0xff
}
if err := screen.ReplacePixels(noiseImage.Pix); err != nil {
return err
}
if err := ebitenutil.DebugPrint(screen, fmt.Sprintf("FPS: %f", ebiten.CurrentFPS())); err != nil {
return err
}
return nil
}
func update(screen *ebiten.Image) error {
if player == nil {
var err error
player, err = audio.NewPlayer(audioContext, &stream{})
if err != nil {
return err
}
if err := player.Play(); err != nil {
return err
}
}
ebitenutil.DebugPrint(screen, fmt.Sprintf("FPS: %0.2f", ebiten.CurrentFPS()))
if err := audioContext.Update(); err != nil {
return err
}
return nil
}
func update(screen *ebiten.Image) error {
if ebiten.IsKeyPressed(ebiten.KeyQ) {
hueInt--
}
if ebiten.IsKeyPressed(ebiten.KeyW) {
hueInt++
}
if ebiten.IsKeyPressed(ebiten.KeyA) {
saturationInt--
}
if ebiten.IsKeyPressed(ebiten.KeyS) {
saturationInt++
}
if ebiten.IsKeyPressed(ebiten.KeyZ) {
valueInt--
}
if ebiten.IsKeyPressed(ebiten.KeyX) {
valueInt++
}
hueInt = clamp(hueInt, -256, 256)
saturationInt = clamp(saturationInt, 0, 256)
valueInt = clamp(valueInt, 0, 256)
w, h := gophersImage.Size()
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(float64(screenWidth-w)/2, float64(screenHeight-h)/2)
hue := float64(hueInt) * 2 * math.Pi / 128
saturation := float64(saturationInt) / 128
value := float64(valueInt) / 128
op.ColorM.ChangeHSV(hue, saturation, value)
if err := screen.DrawImage(gophersImage, op); err != nil {
return err
}
msg := fmt.Sprintf(`Hue: %0.2f [Q][W]
Saturation: %0.2f [A][S]
Value: %0.2f [Z][X]`, hue, saturation, value)
if err := ebitenutil.DebugPrint(screen, msg); err != nil {
return err
}
return nil
}
func update(screen *ebiten.Image) error {
if player == nil {
var err error
player, err = audio.NewPlayer(audioContext, &stream{})
if err != nil {
return err
}
if err := player.Play(); err != nil {
return err
}
}
msg := fmt.Sprintf("FPS: %0.2f\nThis is an example using infinite audio stream.", ebiten.CurrentFPS())
if err := ebitenutil.DebugPrint(screen, msg); err != nil {
return err
}
if err := audioContext.Update(); err != nil {
return err
}
return nil
}
func update(screen *ebiten.Image) error {
if musicPlayer == nil {
select {
case musicPlayer = <-musicCh:
default:
}
}
if seBytes == nil {
select {
case seBytes = <-seCh:
default:
}
}
if musicPlayer != nil {
if err := musicPlayer.updateBar(); err != nil {
return err
}
if err := musicPlayer.updatePlayPause(); err != nil {
return err
}
if err := musicPlayer.updateSE(); err != nil {
return err
}
if err := musicPlayer.updateVolume(); err != nil {
return err
}
}
op := &ebiten.DrawImageOptions{}
x, y, w, h := playerBarRect()
op.GeoM.Translate(float64(x), float64(y))
if err := screen.DrawImage(playerBarImage, op); err != nil {
return err
}
currentTimeStr := "00:00"
if musicPlayer != nil {
c := musicPlayer.audioPlayer.Current()
// Current Time
m := (c / time.Minute) % 100
s := (c / time.Second) % 60
currentTimeStr = fmt.Sprintf("%02d:%02d", m, s)
// Bar
cw, ch := playerCurrentImage.Size()
cx := int(time.Duration(w)*c/musicPlayer.total) + x - cw/2
cy := y - (ch-h)/2
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(float64(cx), float64(cy))
if err := screen.DrawImage(playerCurrentImage, op); err != nil {
return err
}
}
msg := fmt.Sprintf(`FPS: %0.2f
Press S to toggle Play/Pause
Press P to play SE
Press Z or X to change volume of the music
%s`, ebiten.CurrentFPS(), currentTimeStr)
if musicPlayer == nil {
msg += "\nNow Loading..."
} else if musicPlayer.seekedCh != nil {
select {
case err := <-musicPlayer.seekedCh:
if err != nil {
return err
}
close(musicPlayer.seekedCh)
musicPlayer.seekedCh = nil
default:
msg += "\nSeeking..."
}
}
if err := ebitenutil.DebugPrint(screen, msg); err != nil {
return err
}
if err := audioContext.Update(); err != nil {
return err
}
return nil
}