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 (c *gamepadConfig) IsButtonPressed(id int, b abstractButton) bool {
c.initializeIfNeeded()
bb, ok := c.buttons[b]
if ok {
return ebiten.IsGamepadButtonPressed(0, bb)
}
a, ok := c.axes[b]
if ok {
v := ebiten.GamepadAxis(0, a.id)
if a.positive {
return threshold <= v && v <= 1.0
} else {
return -1.0 <= v && v <= -threshold
}
}
return false
}
func (c *gamepadConfig) Scan(index int, b abstractButton) bool {
c.initializeIfNeeded()
delete(c.buttons, b)
delete(c.axes, b)
ebn := ebiten.GamepadButton(ebiten.GamepadButtonNum(index))
for eb := ebiten.GamepadButton(0); eb < ebn; eb++ {
if _, ok := c.assignedButtons[eb]; ok {
continue
}
if ebiten.IsGamepadButtonPressed(index, eb) {
c.buttons[b] = eb
c.assignedButtons[eb] = struct{}{}
return true
}
}
an := ebiten.GamepadAxisNum(index)
for a := 0; a < an; a++ {
v := ebiten.GamepadAxis(index, a)
// Check v <= 1.0 because there is a bug that a button returns an axis value wrongly and the value may be over 1.
if threshold <= v && v <= 1.0 {
if _, ok := c.assignedAxes[axis{a, true}]; !ok {
c.axes[b] = axis{a, true}
c.assignedAxes[axis{a, true}] = struct{}{}
return true
}
}
if -1.0 <= v && v <= -threshold {
if _, ok := c.assignedAxes[axis{a, false}]; !ok {
c.axes[b] = axis{a, false}
c.assignedAxes[axis{a, false}] = struct{}{}
return true
}
}
}
return false
}