coffee_crisis/source/input.cpp

#include "input.h"
#include <stdio.h>

// Constructor
Input::Input(int source)
{
	// Inicializa las variables
	for (int i = 0; i < 15; i++)
	{
		mKeyBindings[i].scancode = 0;
		mKeyBindings[i].active = false;

		mGameControllerBindings[i].button = SDL_CONTROLLER_BUTTON_INVALID;
		mGameControllerBindings[i].active = false;
	}

	// Comprueba si hay algún mando conectado
	discoverGameController();

	// En caso de haber un mando, el objeto se puede utilizar con entradas de mando
	if (mGameControllerFound)
		mSource = source;
	// Si no hay un mando, el objeto se configura como teclado
	else
		mSource = USE_KEYBOARD;
}

// Destructor
Input::~Input()
{
}

// Asigna uno de los posibles inputs a una tecla del teclado
void Input::bindKey(Uint8 input, SDL_Scancode code)
{
	mKeyBindings[input].scancode = code;
}

// Asigna uno de los posibles inputs a un botón del mando
void Input::bindGameController(Uint8 input, SDL_GameControllerButton button)
{
	mGameControllerBindings[input].button = button;
}

// Comprueba si un input esta activo
bool Input::checkInput(Uint8 input, bool repeat)
{
	if (mSource == USE_KEYBOARD)
	{
		const Uint8 *mKeystates = SDL_GetKeyboardState(NULL);

		if (repeat)
		{
			if (mKeystates[mKeyBindings[input].scancode] != 0)
				return true;
			else
				return false;
		}
		else
		{
			if (!mKeyBindings[input].active)
			{
				if (mKeystates[mKeyBindings[input].scancode] != 0)
				{
					mKeyBindings[input].active = true;
					return true;
				}
				else
				{
					return false;
				}
			}
			else
			{
				if (mKeystates[mKeyBindings[input].scancode] == 0)
				{
					mKeyBindings[input].active = false;
					return false;
				}
				else
				{
					return false;
				}
			}
		}
	}
	else // Utiliza mando
	{
		if (repeat)
		{
			if (SDL_GameControllerGetButton(mGameController, mGameControllerBindings[input].button) != 0)
				return true;
			else
				return false;
		}
		else
		{
			if (!mGameControllerBindings[input].active)
			{
				if (SDL_GameControllerGetButton(mGameController, mGameControllerBindings[input].button) != 0)
				{
					mGameControllerBindings[input].active = true;
					return true;
				}
				else
				{
					return false;
				}
			}
			else
			{
				if (SDL_GameControllerGetButton(mGameController, mGameControllerBindings[input].button) == 0)
				{
					mGameControllerBindings[input].active = false;
					return false;
				}
				else
				{
					return false;
				}
			}
		}
	}
}

// Gestiona las entradas desde el mando de juego
/*bool Input::checkGameController(Uint8 state)
{
	bool success = false;

	// No hay mando. Siempre devuelve falso salvo NO_INPUT que siempre es cierto
	if (!mGameControllerFound)
	{
		if (state == NO_INPUT)
			return true;
		else
			return false;
	}


	switch (state)
	{
	case INPUT_NULL:
		success = !checkGameController(INPUT_UP) && !checkGameController(INPUT_DOWN) && !checkGameController(INPUT_LEFT) && !checkGameController(INPUT_RIGHT) &&
				  !checkGameController(INPUT_ACCEPT) && !checkGameController(INPUT_CANCEL) && !checkGameController(INPUT_PAUSE) &&
				  !checkGameController(INPUT_FIRE_UP) && !checkGameController(INPUT_FIRE_LEFT) && !checkGameController(INPUT_FIRE_RIGHT);
		break;
	case INPUT_UP:
		success = (SDL_JoystickGetAxis(mGameController, 1) < -JOYSTICK_DEAD_ZONE) || (SDL_JoystickGetButton(mGameController, SDL_CONTROLLER_BUTTON_DPAD_UP));
		break;
	case INPUT_DOWN:
		success = (SDL_JoystickGetAxis(mGameController, 1) > JOYSTICK_DEAD_ZONE) || (SDL_JoystickGetButton(mGameController, SDL_CONTROLLER_BUTTON_DPAD_DOWN));
		break;
	case INPUT_LEFT:
		success = (SDL_JoystickGetAxis(mGameController, 0) < -JOYSTICK_DEAD_ZONE) || (SDL_JoystickGetButton(mGameController, SDL_CONTROLLER_BUTTON_DPAD_LEFT));
		break;
	case INPUT_RIGHT:
		success = (SDL_JoystickGetAxis(mGameController, 0) > JOYSTICK_DEAD_ZONE) || (SDL_JoystickGetButton(mGameController, SDL_CONTROLLER_BUTTON_DPAD_RIGHT));
		break;
	case INPUT_ACCEPT:
		success = (SDL_JoystickGetButton(mGameController, SDL_CONTROLLER_BUTTON_B));
		break;
	case INPUT_CANCEL:
		success = (SDL_JoystickGetButton(mGameController, SDL_CONTROLLER_BUTTON_A));
		break;
	case INPUT_PAUSE:
		success = (SDL_JoystickGetButton(mGameController, SDL_CONTROLLER_BUTTON_START));
		break;
	case INPUT_FIRE_UP:
		success = (SDL_JoystickGetButton(mGameController, SDL_CONTROLLER_BUTTON_Y));
		break;
	case INPUT_FIRE_LEFT:
		success = (SDL_JoystickGetButton(mGameController, SDL_CONTROLLER_BUTTON_X));
		break;
	case INPUT_FIRE_RIGHT:
		success = (SDL_JoystickGetButton(mGameController, SDL_CONTROLLER_BUTTON_B));
		break;

	default:
		break;
	}
	return success;
}*/

// Comprueba si hay un mando conectado
bool Input::discoverGameController()
{
	if (SDL_NumJoysticks() < 1)
	{
		printf("Warning: No joysticks connected!\n");
		mGameControllerFound = false;
	}
	else
	{
		// Carga el mando
		mGameController = SDL_GameControllerOpen(0);
		mGameControllerFound = true;

		if (mGameController == NULL)
		{
			printf("Warning: Unable to open game controller!\nSDL Error: %s\n", SDL_GetError());
			mGameControllerFound = false;
		}
		else
		{
			printf("%i joysticks were found.\n", SDL_NumJoysticks());
			//printf("%i buttons\n", SDL_JoystickNumButtons(mGameController));

			// Obtiene el dispositivo de control háptico
			/*mControllerHaptic = SDL_HapticOpenFromJoystick(mGameController);
			if (mControllerHaptic == NULL)
			{
				printf("Warning: Controller does not support haptics!\nSDL Error: %s\n", SDL_GetError());
			}
			else
			{
				printf("Haptics detected\n");

				// Inicializa la vibración
				if (SDL_HapticRumbleInit(mControllerHaptic) < 0)
				{
					printf("Warning: Unable to initialize rumble!\nSDL Error: %s\n", SDL_GetError());
				}
			}*/
		}
	}

	return mGameControllerFound;
}