[DirectX12] 5) Input

Input 클래스는 키보드의 입력, 마우스의 클릭을 입력받기 위해 작성했다.

 

Input.h

#pragma once

enum class KEY_TYPE
{
	UP = VK_UP,
	DOWN = VK_DOWN,
	LEFT = VK_LEFT,
	RIGHT = VK_RIGHT,

	LBUTTON = VK_LBUTTON,
	RBUTTON = VK_RBUTTON,
};

enum class KEY_STATE
{
	NONE,
	PRESS,
	DOWN,
	UP,
	END
};

enum
{
	KEY_TYPE_COUNT = static_cast<int32>(UINT8_MAX + 1),
	KEY_STATE_COUNT = static_cast<int32>(KEY_STATE::END),
};

class Input
{
	DECLARE_SINGLE(Input);

public:
	void Init(HWND hwnd);
	void Update();

	// 누르고 있을 때
	bool GetButton(KEY_TYPE key) { return GetState(key) == KEY_STATE::PRESS; }
	// 맨 처음 눌렀을 때
	bool GetButtonDown(KEY_TYPE key) { return GetState(key) == KEY_STATE::DOWN; }
	// 맨 처음 눌렀다 뗐을 때
	bool GetButtonUp(KEY_TYPE key) { return GetState(key) == KEY_STATE::UP; }

	const POINT& GetMousePos() { return _mousePos; }

private:
	inline KEY_STATE GetState(KEY_TYPE key) { return _states[static_cast<uint8>(key)]; }

private:
	HWND _hwnd;
	vector<KEY_STATE> _states;
	POINT _mousePos = {};
};

 

Input.cpp

#include "Input.h"
#include "Engine.h"

void Input::Init(HWND hwnd)
{
_hwnd = hwnd;
_states.resize(KEY_TYPE_COUNT, KEY_STATE::NONE);
}

void Input::Update()
{
HWND hwnd = ::GetActiveWindow();
if (_hwnd != hwnd)
{
for (uint32 key = 0; key < KEY_TYPE_COUNT; key++)
_states[key] = KEY_STATE::NONE;

return;
}

BYTE asciiKeys[KEY_TYPE_COUNT] = {};
if (::GetKeyboardState(asciiKeys) == false)
return;

for (uint32 key = 0; key < KEY_TYPE_COUNT; key++)
{
// 키가 눌려 있으면 true
if (asciiKeys[key] & 0x80)
{
KEY_STATE& state = _states[key];

// 이전 프레임에 키를 누른 상태라면 PRESS
if (state == KEY_STATE::PRESS || state == KEY_STATE::DOWN)
state = KEY_STATE::PRESS;
else
state = KEY_STATE::DOWN;
}
else
{
KEY_STATE& state = _states[key];

// 이전 프레임에 키를 누른 상태라면 UP
if (state == KEY_STATE::PRESS || state == KEY_STATE::DOWN)
state = KEY_STATE::UP;
else
state = KEY_STATE::NONE;
}
}

::GetCursorPos(&_mousePos);
::ScreenToClient(GEngine->GetWindow().hwnd, &_mousePos);
}

Unity와 비슷하도록 구현된 Input 클래스