The Skung Cave commit

2024-05-09 20:52:01 +10:00
parent 446c444728
commit 9461fe08cf
35 changed files with 11988 additions and 9097 deletions
--- a/Sources/JolkEngine/Input/GamePad.swift
+++ b/Sources/JolkEngine/Input/GamePad.swift
@ -0,0 +1,157 @@
+import Foundation
+import SDL2
+
+
+public class GamePad
+{
+	public enum Axes
+	{
+		case leftStickX, leftStickY
+		case rightStickX, rightStickY
+		case leftTrigger, rightTrigger
+	}
+
+	public enum Buttons
+	{
+		case east, south, north, west
+		case select, start, guide, mic, touchPad
+		case leftStick, rightStick
+		case leftBumper, rightBumper
+		case dpadLeft, dpadRight, dpadUp, dpadDown
+		case paddle1, paddle2, paddle3, paddle4
+	}
+
+	public struct State
+	{
+		public func down(_ btn: Buttons) -> Bool { btnState(btn) & GamePad._DOWN == GamePad._DOWN }
+		public func pressed(_ btn: Buttons) -> Bool { btnState(btn) == GamePad._PRESS }
+		public func released(_ btn: Buttons) -> Bool { btnState(btn) == GamePad._RELEASE }
+
+		public func axis(_ axis: Axes) -> Float
+		{
+			let axisRescale = 1.0 / Float(Int16.max)
+			return Float(rawAxis(axis)) * axisRescale
+		}
+
+		@inline(__always) func rawAxis(_ axis: Axes) -> Int16
+		{
+			_axes[Int(axis.sdlEnum.rawValue)]
+		}
+
+		@inline(__always) private func btnState(_ btn: Buttons) -> UInt8
+		{
+			_btns[Int(btn.sdlEnum.rawValue)]
+		}
+
+		private let _btns: [UInt8], _axes: [Int16]
+
+		internal init(btns: [UInt8], axes: [Int16])
+		{
+			self._btns = btns
+			self._axes = axes
+		}
+	}
+
+	public var state: State
+	{
+		.init(btns: _btns, axes: _axes)
+	}
+
+	@inline(__always) public static var current: GamePad?
+	{
+		let input = Input.instance
+		return if let id = input.firstPadID { input.getPad(id: id) } else { nil }
+	}
+
+	private static let _UP = UInt8(0b00), _DOWN = UInt8(0b10), _IMPULSE = UInt8(0b01)
+	private static let _PRESS = _DOWN | _IMPULSE
+	private static let _RELEASE = _UP | _IMPULSE
+
+	private var _btns = [UInt8](repeating: 0, count: Int(SDL_CONTROLLER_BUTTON_MAX.rawValue))
+	private var _axes = [Int16](repeating: 0, count: Int(SDL_CONTROLLER_AXIS_MAX.rawValue))
+	private var _sdlPad: OpaquePointer
+
+	internal init(pad: OpaquePointer)
+	{
+		self._sdlPad = pad
+	}
+
+	internal func newTick()
+	{
+		_btns = _btns.map({ $0 & ~Self._IMPULSE })
+	}
+
+	internal func close()
+	{
+		SDL_GameControllerClose(_sdlPad)
+	}
+
+	internal func buttonPressEvent(_ btn: UInt8)
+	{
+		_btns[Int(btn)] = Self._PRESS
+	}
+
+	internal func buttonReleaseEvent(_ btn: UInt8)
+	{
+		_btns[Int(btn)] = Self._RELEASE
+	}
+
+	internal func axisEvent(_ axis: UInt8, _ value: Int16)
+	{
+		_axes[Int(axis)] = value
+	}
+}
+
+public extension GamePad.State
+{
+	var leftStick: Vec2f { Vec2f(axis(.leftStickX), axis(.leftStickY)) }
+	var rightStick: Vec2f { Vec2f(axis(.rightStickX), axis(.rightStickY)) }
+}
+
+
+internal extension GamePad.Axes
+{
+	var sdlEnum: SDL_GameControllerAxis
+	{
+		switch self
+		{
+		case .leftStickX:   SDL_CONTROLLER_AXIS_LEFTX
+		case .leftStickY:   SDL_CONTROLLER_AXIS_LEFTY
+		case .rightStickX:  SDL_CONTROLLER_AXIS_RIGHTX
+		case .rightStickY:  SDL_CONTROLLER_AXIS_RIGHTY
+		case .leftTrigger:  SDL_CONTROLLER_AXIS_TRIGGERLEFT
+		case .rightTrigger: SDL_CONTROLLER_AXIS_TRIGGERRIGHT
+		}
+	}
+}
+
+internal extension GamePad.Buttons
+{
+	var sdlEnum: SDL_GameControllerButton
+	{
+		switch self
+		{
+		case .east:        SDL_CONTROLLER_BUTTON_B
+		case .south:       SDL_CONTROLLER_BUTTON_A
+		case .west:        SDL_CONTROLLER_BUTTON_Y
+		case .north:       SDL_CONTROLLER_BUTTON_X
+		case .start:       SDL_CONTROLLER_BUTTON_START
+		case .select:      SDL_CONTROLLER_BUTTON_BACK
+		case .guide:       SDL_CONTROLLER_BUTTON_GUIDE
+		case .mic:         SDL_CONTROLLER_BUTTON_MISC1
+		case .touchPad:    SDL_CONTROLLER_BUTTON_TOUCHPAD
+		case .leftStick:   SDL_CONTROLLER_BUTTON_LEFTSTICK
+		case .rightStick:  SDL_CONTROLLER_BUTTON_RIGHTSTICK
+		case .leftBumper:  SDL_CONTROLLER_BUTTON_LEFTSHOULDER
+		case .rightBumper: SDL_CONTROLLER_BUTTON_RIGHTSHOULDER
+		case .dpadUp:      SDL_CONTROLLER_BUTTON_DPAD_UP
+		case .dpadDown:    SDL_CONTROLLER_BUTTON_DPAD_DOWN
+		case .dpadLeft:    SDL_CONTROLLER_BUTTON_DPAD_LEFT
+		case .dpadRight:   SDL_CONTROLLER_BUTTON_DPAD_RIGHT
+		case .paddle1:     SDL_CONTROLLER_BUTTON_PADDLE1
+		case .paddle2:     SDL_CONTROLLER_BUTTON_PADDLE2
+		case .paddle3:     SDL_CONTROLLER_BUTTON_PADDLE3
+		case .paddle4:     SDL_CONTROLLER_BUTTON_PADDLE4
+		}
+	}
+}