194 lines
6.5 KiB
Go
194 lines
6.5 KiB
Go
package pixelgl
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import (
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"github.com/go-gl/glfw/v3.3/glfw"
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)
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// Joystick is a joystick or controller (gamepad).
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type Joystick int
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// List all of the joysticks.
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const (
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Joystick1 = Joystick(glfw.Joystick1)
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Joystick2 = Joystick(glfw.Joystick2)
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Joystick3 = Joystick(glfw.Joystick3)
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Joystick4 = Joystick(glfw.Joystick4)
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Joystick5 = Joystick(glfw.Joystick5)
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Joystick6 = Joystick(glfw.Joystick6)
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Joystick7 = Joystick(glfw.Joystick7)
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Joystick8 = Joystick(glfw.Joystick8)
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Joystick9 = Joystick(glfw.Joystick9)
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Joystick10 = Joystick(glfw.Joystick10)
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Joystick11 = Joystick(glfw.Joystick11)
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Joystick12 = Joystick(glfw.Joystick12)
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Joystick13 = Joystick(glfw.Joystick13)
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Joystick14 = Joystick(glfw.Joystick14)
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Joystick15 = Joystick(glfw.Joystick15)
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Joystick16 = Joystick(glfw.Joystick16)
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JoystickLast = Joystick(glfw.JoystickLast)
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)
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// GamepadAxis corresponds to a gamepad axis.
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type GamepadAxis int
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// Gamepad axis IDs.
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const (
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AxisLeftX = GamepadAxis(glfw.AxisLeftX)
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AxisLeftY = GamepadAxis(glfw.AxisLeftY)
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AxisRightX = GamepadAxis(glfw.AxisRightX)
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AxisRightY = GamepadAxis(glfw.AxisRightY)
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AxisLeftTrigger = GamepadAxis(glfw.AxisLeftTrigger)
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AxisRightTrigger = GamepadAxis(glfw.AxisRightTrigger)
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AxisLast = GamepadAxis(glfw.AxisLast)
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)
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// GamepadButton corresponds to a gamepad button.
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type GamepadButton int
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// Gamepad button IDs.
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const (
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ButtonA = GamepadButton(glfw.ButtonA)
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ButtonB = GamepadButton(glfw.ButtonB)
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ButtonX = GamepadButton(glfw.ButtonX)
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ButtonY = GamepadButton(glfw.ButtonY)
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ButtonLeftBumper = GamepadButton(glfw.ButtonLeftBumper)
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ButtonRightBumper = GamepadButton(glfw.ButtonRightBumper)
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ButtonBack = GamepadButton(glfw.ButtonBack)
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ButtonStart = GamepadButton(glfw.ButtonStart)
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ButtonGuide = GamepadButton(glfw.ButtonGuide)
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ButtonLeftThumb = GamepadButton(glfw.ButtonLeftThumb)
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ButtonRightThumb = GamepadButton(glfw.ButtonRightThumb)
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ButtonDpadUp = GamepadButton(glfw.ButtonDpadUp)
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ButtonDpadRight = GamepadButton(glfw.ButtonDpadRight)
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ButtonDpadDown = GamepadButton(glfw.ButtonDpadDown)
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ButtonDpadLeft = GamepadButton(glfw.ButtonDpadLeft)
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ButtonLast = GamepadButton(glfw.ButtonLast)
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ButtonCross = GamepadButton(glfw.ButtonCross)
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ButtonCircle = GamepadButton(glfw.ButtonCircle)
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ButtonSquare = GamepadButton(glfw.ButtonSquare)
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ButtonTriangle = GamepadButton(glfw.ButtonTriangle)
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)
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// JoystickPresent returns if the joystick is currently connected.
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//
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// This API is experimental.
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func (w *Window) JoystickPresent(js Joystick) bool {
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return w.currJoy.connected[js]
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}
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// JoystickName returns the name of the joystick. A disconnected joystick will return an
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// empty string.
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//
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// This API is experimental.
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func (w *Window) JoystickName(js Joystick) string {
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return w.currJoy.name[js]
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}
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// JoystickButtonCount returns the number of buttons a connected joystick has.
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//
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// This API is experimental.
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func (w *Window) JoystickButtonCount(js Joystick) int {
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return len(w.currJoy.buttons[js])
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}
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// JoystickAxisCount returns the number of axes a connected joystick has.
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//
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// This API is experimental.
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func (w *Window) JoystickAxisCount(js Joystick) int {
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return len(w.currJoy.axis[js])
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}
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// JoystickPressed returns whether the joystick Button is currently pressed down.
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// If the button index is out of range, this will return false.
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//
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// This API is experimental.
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func (w *Window) JoystickPressed(js Joystick, button GamepadButton) bool {
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return w.currJoy.getButton(js, int(button))
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}
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// JoystickJustPressed returns whether the joystick Button has just been pressed down.
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// If the button index is out of range, this will return false.
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//
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// This API is experimental.
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func (w *Window) JoystickJustPressed(js Joystick, button GamepadButton) bool {
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return w.currJoy.getButton(js, int(button)) && !w.prevJoy.getButton(js, int(button))
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}
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// JoystickJustReleased returns whether the joystick Button has just been released up.
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// If the button index is out of range, this will return false.
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//
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// This API is experimental.
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func (w *Window) JoystickJustReleased(js Joystick, button GamepadButton) bool {
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return !w.currJoy.getButton(js, int(button)) && w.prevJoy.getButton(js, int(button))
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}
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// JoystickAxis returns the value of a joystick axis at the last call to Window.Update.
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// If the axis index is out of range, this will return 0.
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//
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// This API is experimental.
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func (w *Window) JoystickAxis(js Joystick, axis GamepadAxis) float64 {
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return w.currJoy.getAxis(js, int(axis))
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}
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// Used internally during Window.UpdateInput to update the state of the joysticks.
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func (w *Window) updateJoystickInput() {
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for js := Joystick1; js <= JoystickLast; js++ {
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// Determine and store if the joystick was connected
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joystickPresent := glfw.Joystick(js).Present()
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w.tempJoy.connected[js] = joystickPresent
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if joystickPresent {
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if glfw.Joystick(js).IsGamepad() {
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gamepadInputs := glfw.Joystick(js).GetGamepadState()
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w.tempJoy.buttons[js] = gamepadInputs.Buttons[:]
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w.tempJoy.axis[js] = gamepadInputs.Axes[:]
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} else {
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w.tempJoy.buttons[js] = glfw.Joystick(js).GetButtons()
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w.tempJoy.axis[js] = glfw.Joystick(js).GetAxes()
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}
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if !w.currJoy.connected[js] {
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// The joystick was recently connected, we get the name
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w.tempJoy.name[js] = glfw.Joystick(js).GetName()
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} else {
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// Use the name from the previous one
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w.tempJoy.name[js] = w.currJoy.name[js]
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}
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} else {
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w.tempJoy.buttons[js] = []glfw.Action{}
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w.tempJoy.axis[js] = []float32{}
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w.tempJoy.name[js] = ""
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}
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}
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w.prevJoy = w.currJoy
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w.currJoy = w.tempJoy
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}
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type joystickState struct {
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connected [JoystickLast + 1]bool
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name [JoystickLast + 1]string
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buttons [JoystickLast + 1][]glfw.Action
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axis [JoystickLast + 1][]float32
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}
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// Returns if a button on a joystick is down, returning false if the button or joystick is invalid.
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func (js *joystickState) getButton(joystick Joystick, button int) bool {
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// Check that the joystick and button is valid, return false by default
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if js.buttons[joystick] == nil || button >= len(js.buttons[joystick]) || button < 0 {
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return false
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}
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return js.buttons[joystick][byte(button)] == glfw.Press
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}
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// Returns the value of a joystick axis, returning 0 if the button or joystick is invalid.
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func (js *joystickState) getAxis(joystick Joystick, axis int) float64 {
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// Check that the joystick and axis is valid, return 0 by default.
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if js.axis[joystick] == nil || axis >= len(js.axis[joystick]) || axis < 0 {
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return 0
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}
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return float64(js.axis[joystick][axis])
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}
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