gp_input.cpp

圣剑二完整的游戏代码。附作者写的三篇文章。游戏的开发过程

//********************************************
//	DirectInput 相关处理函数
//********************************************
#include <windows.h>
#include <stdio.h>
#include <dinput.h>
#include "gp_other.h"
#include "gp_init.h"
#include "gp_input.h"

//全局通用对象
CMouse Mouse;			//鼠标
CKey Key;				//键盘
CJoystick g_Joystick;	//手柄

extern HWND hWnd;
extern HINSTANCE hInst;
extern BOOL bActive;
#if USE_DX8
	LPDIRECTINPUT8	lpDI;	//DINPUT设备
#else
	LPDIRECTINPUT	lpDI;	//DINPUT设备
#endif

/////////////////////////////////////////////////////////////////
//INPUT
/////////////////////////////////////////////////////////////////

//初始化DIRECTINPUT
bool WINAPI InitInput()
{
    HRESULT hr;
#if USE_DX8
    hr = DirectInput8Create( hInst, DIRECTINPUT_VERSION, IID_IDirectInput8,(void**)&lpDI, NULL );
#else
	hr = DirectInputCreate( hInst, DIRECTINPUT_VERSION, &lpDI, NULL );
#endif
    if ( FAILED(hr) )
	{
		MessageBox(hWnd,"Create DirectInput","Failed",MB_OK);
        return false;
	}
	return true;
}

//释放DIRECTINPUT
void WINAPI FreeInput()
{
	_RELEASE( lpDI );
}

/////////////////////////////////////////////////////////////////
//MOUSE
/////////////////////////////////////////////////////////////////

//初始化鼠标
HRESULT WINAPI CMouse::InitInput_Mouse( HWND hDlg )
{
    HRESULT hr;
	//创建设备
    hr = lpDI->CreateDevice( GUID_SysMouse, &g_pMouse, NULL );
    if ( FAILED(hr) ) 
    {
		MessageBox(hWnd,"Create Mouse Device","Failed",MB_OK);
        return hr;
	}
	//数据格式
    hr = g_pMouse->SetDataFormat( &c_dfDIMouse );
    if ( FAILED(hr) ) 
    {
		MessageBox(hWnd,"Set Mouse Data Format","Failed",MB_OK);
        return hr;
	}
	//协作级
    hr = g_pMouse->SetCooperativeLevel( hWnd, DISCL_NONEXCLUSIVE | DISCL_FOREGROUND);
    if ( FAILED(hr) ) 
    {
		MessageBox(hWnd,"Set Mouse Cooperative Level","Failed",MB_OK);
        return hr;
	}
	//属性
	DIPROPDWORD property;
	property.diph.dwSize=sizeof(DIPROPDWORD);
	property.diph.dwHeaderSize=sizeof(DIPROPHEADER);
	property.diph.dwObj=0;
	property.diph.dwHow=DIPH_DEVICE;
	property.dwData=16;

	hr = g_pMouse->SetProperty(DIPROP_BUFFERSIZE, &property.diph);
	if (FAILED(hr))
	{
		MessageBox(hWnd,"Set Mouse Property","Failed",MB_OK);
        return hr;
	}
	//获取
    hr = g_pMouse->Acquire(); 
    if FAILED(hr) 
    {
        return hr;
	}

    return true;
}

//获取设备
HRESULT WINAPI CMouse::SetAcquire( HWND hDlg )
{
    if (NULL == g_pMouse)
        return S_FALSE;

    if (bActive) 
    {
        g_pMouse->Acquire();
    } 
    else 
    {
        g_pMouse->Unacquire();
    }

    return S_OK;
}

//释放DIRECTINPUT设备MOUSE
void WINAPI CMouse::FreeInput_Mouse()
{
	if( g_pMouse )
	{
		g_pMouse->Unacquire();
		g_pMouse->Release();
		g_pMouse=NULL;
	}
}

//获取缓冲区数据
unsigned char WINAPI CMouse::GetMouseData()
{
	if( g_pMouse )
	{
_Begin:
		DIDEVICEOBJECTDATA	data;
		DWORD				elements=1;		//一个元素
		HRESULT hr = g_pMouse->GetDeviceData(sizeof(data), &data, &elements, 0);
	    if FAILED(hr)
		{
			if(hr == DIERR_INPUTLOST)
			{
				hr = g_pMouse->Acquire();
			}
		}
		else
		{
			if(elements == 1)
			{
				switch(data.dwOfs)
				{
					case DIMOFS_X:			//忽略移动数据
					case DIMOFS_Y: 
						goto _Begin;
						break;
					case DIMOFS_BUTTON0: 
						if( data.dwData & 0x80 )		//高位为1：按下
							return LB_DOWN;
						return LB_UP;					//否则释放
						break;
					case DIMOFS_BUTTON1: 
						if( data.dwData & 0x80 ) 
							return RB_DOWN;
						return RB_UP;
						break;
				}
			}
			else 
				if(elements==0) 
					return 0;
		}
	}

	return 0;
}

//清空鼠标缓冲区
void WINAPI CMouse::ReleaseMouseBuffer()
{
	while(1)
	{
		if( GetMouseData()== 0 ) break;
	}
}

//**************************
//获取鼠标当前状态（经新浪网友wing_of_dream改进）
//没有太多改进，仅仅测试一下是否没有获取过鼠标设备
void WINAPI CMouse::GetMouseState()
{
	if (g_pMouse) 
	{
		DIMOUSESTATE dims; 
		HRESULT hr;

	_again:
		hr = g_pMouse->GetDeviceState(sizeof(DIMOUSESTATE), &dims);//得到当前状态
		if( FAILED(hr) )
		{
			hr = g_pMouse->Acquire();			//重新获取
			if(!( hr== DI_OK))
			{
				for (int i=0;i<50;i++)
				{
					if ((hr = g_pMouse->Acquire()) == DI_OK)
					break;
				}
			}
			
			if (SUCCEEDED(hr)) 
			{
				goto _again;
			}
		}

		if( hr == DIERR_NOTACQUIRED )
		{
			return;
		}

		//获取鼠标按键信息
		if( SUCCEEDED( hr ))
		{
			if( dims.rgbButtons[0] & 0x80 )	//按下
				MouseButton[0]=1;
			else 
				MouseButton[0]=0;			//没有按下

			if( dims.rgbButtons[1] & 0x80 )
				MouseButton[1]=1;
			else 
				MouseButton[1]=0;
		}
	}
}

//等待鼠标输入，程序中断
bool WINAPI CMouse::WaitMouse(char act)
{
	char Button=GetMouseData();
	while( Button != act )
	{
		Button=GetMouseData();
	}
	return true;
}

//某键当前是否按下 0=左 1=右 2=中 4=左右
bool WINAPI CMouse::IsButton( char Button )
{
	GetMouseState();
	if( Button==4 )
	{
		if( MouseButton[0] && MouseButton[1] )	//按下
			while(1)
			{
				GetMouseState();
				if( GetAsyncKeyState( VK_RETURN ) ) break;
				if( !MouseButton[0] || !MouseButton[1] )	//松开
					return true;
			}
	}
	else
	if( MouseButton[Button] )	//按下
		while(1)
		{
			GetMouseState();
			if( GetAsyncKeyState( VK_RETURN ) ) break;
			if( !MouseButton[Button] )	//松开
				return true;
		}

	return false;
}

//返回当前按下某键 0=左 1=右 2=中 4=左右 -1=无
char WINAPI CMouse::DownButton()
{
	GetMouseState();
	
	if( MouseButton[0] && MouseButton[1] )	//左右
		return 4;
	if( MouseButton[0] )	//左
		return 0;
	if( MouseButton[1] )	//右
		return 1;

	return -1;
}

/////////////////////////////////////////////////////////////////
//KEYBOARD
/////////////////////////////////////////////////////////////////

CKey::CKey()
{
	memset( KeyState, 0, 256);
	memset( KeyBuffer, 0, KEYBUFFERSIZE );
	KeyBuffer_Start = KeyBuffer_End = 0;
}

CKey::~CKey()
{
}

//初始化DIRECTINPUT设备
bool WINAPI CKey::InitInput_Key(HWND hWnd)
{
	HRESULT hr;

	//返回一个DIRECTINPUT设备的指针
	hr=lpDI->CreateDevice(GUID_SysKeyboard, &lpDIKey, NULL);
	if( FAILED(hr) ) 
	{
		FreeInput_Key();
		return false;
	}

	//设置数据格式
	hr=lpDIKey->SetDataFormat(&c_dfDIKeyboard);
	if( FAILED(hr) )
	{
		FreeInput_Key();
		return false;
	}

	//设置协作层
	hr=lpDIKey->SetCooperativeLevel(hWnd, DISCL_NONEXCLUSIVE | DISCL_FOREGROUND);
	if( FAILED(hr) ) 
	{
		FreeInput_Key();
		return false;
	}
	//设置属性
	DIPROPDWORD property;
	property.diph.dwSize=sizeof(DIPROPDWORD);
	property.diph.dwHeaderSize=sizeof(DIPROPHEADER);
	property.diph.dwObj=0;
	property.diph.dwHow=DIPH_DEVICE;
	property.dwData=KEYBUFFERSIZE;

	hr = lpDIKey->SetProperty(DIPROP_BUFFERSIZE, &property.diph);

    if FAILED(hr)
	{
		// 设置缓冲区失败
		MessageBox(hWnd, "error on set Key Buffer size", "error", MB_OK);
        return FALSE;
    }

	//得到设备通道
	hr=lpDIKey->Acquire();
	if( FAILED(hr) )
	{
		FreeInput_Key();
		return false;
	}

	return true;
}

//获取设备
HRESULT WINAPI CKey::SetAcquire( HWND hDlg )
{
    if ( NULL == lpDIKey )
        return S_FALSE;

    if (bActive) 
    {
        lpDIKey->Acquire();
    } 
    else 
    {
        lpDIKey->Unacquire();
    }

    return S_OK;
}

//释放DIRECTINPUT设备KEY
void WINAPI CKey::FreeInput_Key()
{
	if( lpDIKey )
	{
		lpDIKey->Unacquire();
		lpDIKey->Release();
		lpDIKey=NULL;
	}
}

//获取键盘即时数据
void WINAPI CKey::GetKeyState()
{
	HRESULT hr;

	hr=lpDIKey->GetDeviceState(256, (LPVOID)&KeyState);
	if( FAILED(hr) )
	{
		lpDIKey->Acquire();
		hr=lpDIKey->GetDeviceState(256, (LPVOID)&KeyState);
	}
}

//检测一个键当前是否按下
bool WINAPI CKey::KeyDown(unsigned char Key)
{
	GetKeyState();
	
	if( KEYDOWN(KeyState, Key))
	{
		return true;
	}
	return false;
}

//返回一个键是否按下
bool WINAPI CKey::GetState(unsigned char Key)
{
	if( KEYDOWN(KeyState, Key))
	{
		return true;
	}
	return false;
}

//***************************
//返回键盘缓冲区数据(附带即时数据)
void WINAPI CKey::GetKeyData()
{
	DIDEVICEOBJECTDATA rgdod[KEYBUFFERSIZE];
	DWORD dwItems = KEYBUFFERSIZE;

_again:
	HRESULT hr = lpDIKey->GetDeviceData(sizeof(DIDEVICEOBJECTDATA), rgdod, &dwItems, 0);
	if(hr != DI_OK)		
	{
		for(int i=0; i<256; i++)	//清0
			KeyState[i] = 0;

		if( FAILED(hr) ) 
		{
			hr = lpDIKey->Acquire();
			if FAILED(hr)
			{
				return;
			}
			if SUCCEEDED(hr)
			{
				goto _again;
            }
        }
	}

	if( SUCCEEDED(hr) && dwItems>0 )
	{
		for(DWORD i=0; i<dwItems; i++)