Input Engine

De game loop roept telkens getInput aan, een functie in de SDLInputEngineAdapter. Deze functie polled steeds voor input van de user van de verschillende devices die connected zijn. We maken onderscheid tussen drie verschillende devices. getInput returned een Input struct wanneer een bepaald event type triggered.

Index	Device	Event Trigger	Returns
0	Keyboard	SDL_KEYDOWN	Input { keyCode }
1	Mouse	SDL_MOUSEBUTTONDOWN	Input { x, y, keyCode }
2	Joystick	SDL_CONTROLLERBUTTONDOWN	Input { keyCode }

Voor controllers zijn er nog twee verschillende event types. Deze returnen niets.

Event Type	Function	Returns
SDL_CONTROLLERDEVICEADDED	openController	-
SDL_CONTROLLERDEVICEREMOVED	closeController	-

De keyCode variablen worden opgehaald uit een pre-defined key map aan de hand van de SDL_KeyCode. Deze key maps staan hieronder in tablevorm uitgewerkt:

0: Keyboard KeyMap

SDL KeyCode	Returned KeyCode	Intended Action
SDLK_UP	UP	Move Up
SDLK_DOWN	DOWN	Move Down
SDLK_LEFT	LEFT	Move Left
SDLK_RIGHT	RIGHT	Move Right
SDLK_w	UP	Move Up
SDLK_s	DOWN	Move Down
SDLK_a	LEFT	Move Left
SDLK_d	RIGHT	Move Right
SDLK_SPACE	SPACE	Jump
SDLK_e	E	Inventory
SDLK_q	Q	Quit

1: Mouse KeyMap

SDL KeyCode	Returned KeyCode	Intended Action
SDL_BUTTON_LEFT	MOUSE_BUTTON_LEFT	Click Left
SDL_BUTTON_RIGHT	MOUSE_BUTTON_RIGHT	Click Right

2: Controller KeyMap

SDL KeyCode	Returned KeyCode	Intended Action
SDL_CONTROLLER_BUTTON_A	CONTROLLER_BUTTON_A
SDL_CONTROLLER_BUTTON_B	CONTROLLER_BUTTON_B
SDL_CONTROLLER_BUTTON_X	CONTROLLER_BUTTON_X
SDL_CONTROLLER_BUTTON_Y	CONTROLLER_BUTTON_Y
SDL_CONTROLLER_BUTTON_LEFTSHOULDER	CONTROLLER_BUTTON_LB
SDL_CONTROLLER_BUTTON_RIGHTSHOULDER	CONTROLLER_BUTTON_RB
SDL_CONTROLLER_BUTTON_BACK	CONTROLLER_BUTTON_SELECT
SDL_CONTROLLER_BUTTON_START	CONTROLLER_BUTTON_START
SDL_CONTROLLER_BUTTON_LEFTSTICK	CONTROLLER_BUTTON_L3
SDL_CONTROLLER_BUTTON_RIGHTSTICK	CONTROLLER_BUTTON_R3
SDL_CONTROLLER_BUTTON_DPAD_UP	CONTOLLER_DPAD_UP
SDL_CONTROLLER_BUTTON_DPAD_DOWN	CONTROLLER_DPAD_DOWN
SDL_CONTROLLER_BUTTON_DPAD_LEFT	CONTROLLER_DPAD_LEFT
SDL_CONTROLLER_BUTTON_DPAD_RIGHT	CONTROLLER_DPAD_RIGHT
	CONTROLLER_LEFT_JOYSTICK_UP	Move Up
	CONTROLLER_LEFT_JOYSTICK_DOWN	Move Down
	CONTROLLER_LEFT_JOYSTICK_LEFT	Move Left
	CONTROLLER_LEFT_JOYSTICK_RIGHT	Move Right
	CONTROLLER_RIGHT_JOYSTICK_UP	Camera Up
	CONTROLLER_RIGHT_JOYSTICK_DOWN	Camera Down
	CONTROLLER_RIGHT_JOYSTICK_LEFT	Camera Left
	CONTROLLER_RIGHT_JOYSTICK_RIGHT	Camera Right