游戏引擎

开发平台：
Visual C++

dxmouse.cpp：源码内容
							#include "dxmouse.h"
bool dxmouse::mousedown(int button)
{
	return mouseState.rgbButtons[button] & 0x80;
}
// 初始化创建及设置，并获得鼠标输入状态
bool dxmouse::Init(void)
{
	HRESULT hr;	
	// 创建Direct输入对象
	hr= (DirectInput8Create(hInstance, DIRECTINPUT_VERSION, IID_IDirectInput8, (void**)&lpdi, NULL));
	if(FAILED(hr))
	{
		MessageBox(hWnd, "Could not create main DInput object", "ERROR", MB_OK);
		return false;
	}
	// 创建键盘输入设备
	hr= (lpdi->CreateDevice(GUID_SysKeyboard, &lpdiKeyboard, NULL));
	if(FAILED(hr))
	{
		MessageBox(hWnd, "Could not create keyboard's object",  "ERROR",MB_OK);
		Shutdown();
		return false;
	}
	// 设置键盘数据格式
	hr= (lpdiKeyboard->SetDataFormat(&c_dfDIKeyboard));
	if(FAILED(hr))
	{
		MessageBox(hWnd, "Could not set keyboard's data format","ERROR",MB_OK);
		Shutdown();
		return false;
	}
	hr= (lpdiKeyboard->SetCooperativeLevel(hWnd, DISCL_BACKGROUND|DISCL_NONEXCLUSIVE));
	if(FAILED(hr))
	{
		MessageBox(hWnd, "Could not set keyboard's cooperation level", "ERROR", MB_OK);
		Shutdown();
		return false;
		}
	lpdiKeyboard->Acquire();
	// 创建鼠标输入设备
	hr= lpdi->CreateDevice(GUID_SysMouse, &lpdiMouse, NULL);
	if(FAILED(hr))
	{
		MessageBox(hWnd, "Could not set create the mouse device", "ERROR", MB_OK);
		Shutdown();
		return FALSE;
	}
	// 设置鼠标数据格式
	hr= lpdiMouse->SetDataFormat(&c_dfDIMouse);
	if(FAILED(hr)) 
	{
		MessageBox(hWnd, "Could not set the mouse's data format", "ERROR", MB_OK);
		Shutdown();
		return FALSE;
	}
	hr= lpdiMouse->SetCooperativeLevel(hWnd, DISCL_BACKGROUND | DISCL_NONEXCLUSIVE);
	if(FAILED(hr)) 
	{
		MessageBox(hWnd, "Could not set the mouse's behavior", "ERROR", MB_OK);
		Shutdown();
		return FALSE;
	}
	hr= lpdiMouse->Acquire();
	if(FAILED(hr))
	{
		MessageBox(hWnd, "Could not acquire the mouse", "ERROR", MB_OK);
		Shutdown();
	}
	// 获得鼠标设备状态
	hr= lpdiMouse->GetDeviceState(sizeof(DIMOUSESTATE), &mouseState);
	if(FAILED(hr))
	{
		MessageBox(hWnd, "The mouse has been lost in initialization", "ERROR", MB_OK);
		Shutdown();
	}
	return true;
}
	
	
// 遇到错误调用
void dxmouse::Shutdown(void)
{
	if(lpdiMouse!=NULL)
	{
		lpdiMouse->Unacquire();
		lpdiMouse->Release();
		lpdiMouse= NULL;
	}
	if(lpdiKeyboard!=NULL)
	{
		lpdiKeyboard->Unacquire();
		lpdiKeyboard->Release();
		lpdiKeyboard= NULL;
	}
	
	if(lpdi!=NULL)
	{
		lpdi->Release();
		lpdi=NULL;
	}
}
// 更新信息
void dxmouse::Update(void)
{
	HRESULT hr;
	
	// 检测键盘设备，若丢失，重找回
    hr= (lpdiKeyboard->GetDeviceState(sizeof(UCHAR[256]),(LPVOID)&keyBuffer));
    if(FAILED(hr))
	{ 
        if(hr==DIERR_INPUTLOST) 
		{
			hr= (lpdiKeyboard->Acquire());
			if(FAILED(hr))
			{
				MessageBox(hWnd, "Keyboard has been lost", "ERROR", MB_OK);
				Shutdown();
			}
		}
	}
	// 检测鼠标设备，若丢失，重找回	
    hr= (lpdiMouse->GetDeviceState(sizeof(DIMOUSESTATE),(LPVOID)&mouseState));
    if(FAILED(hr))
	{ 
        if(hr==DIERR_INPUTLOST) 
		{
			hr= (lpdiMouse->Acquire());
			if(FAILED(hr))
			{
				MessageBox(hWnd, "The mouse has been lost", "ERROR", MB_OK);
				Shutdown();
			}
		}
	}
	// 得到有关鼠标的信息
	GetWheelMovement();
	GetMouseMovement();
}
void dxmouse::GetWheelMovement(void)
{	
	z= mouseState.lZ;	
}
void dxmouse::GetMouseMovement(void)
{
	x= mouseState.lX;
	y= mouseState.lY;
}

						