gusucode.com > 一款VC++双人游戏源码-源码程序 > 一款VC++双人游戏源码-源码程序\code\GameEngine.cpp
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//-----------------------------------------------------------------
// Game Engine Object
// C++ Source - GameEngine.cpp
//-----------------------------------------------------------------
//-----------------------------------------------------------------
// Include Files
//-----------------------------------------------------------------
#include "GameEngine.h"
//-----------------------------------------------------------------
// Static Variable Initialization
//-----------------------------------------------------------------
GameEngine *GameEngine::m_pGameEngine = NULL;
//-----------------------------------------------------------------
// Windows Functions
//-----------------------------------------------------------------
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
MSG msg;
static int iTickTrigger = 0;
int iTickCount;
if (GameInitialize(hInstance))
{
// Initialize the game engine
if (!GameEngine::GetEngine()->Initialize(iCmdShow))
return FALSE;
// Enter the main message loop
while (TRUE)
{
if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
// Process the message
if (msg.message == WM_QUIT)
break;
TranslateMessage(&msg);
DispatchMessage(&msg);
}
else
{
// Make sure the game engine isn't sleeping
if (!GameEngine::GetEngine()->GetSleep())
{
// Check the tick count to see if a game cycle has elapsed
iTickCount = GetTickCount();
if (iTickCount > iTickTrigger)
{
iTickTrigger = iTickCount +
GameEngine::GetEngine()->GetFrameDelay();
HandleKeys();
GameEngine::GetEngine()->CheckJoystick();
GameCycle();
}
}
}
}
return (int)msg.wParam;
}
// End the game
GameEnd();
return TRUE;
}
LRESULT CALLBACK WndProc(HWND hWindow, UINT msg, WPARAM wParam, LPARAM lParam)
{
// Route all Windows messages to the game engine
return GameEngine::GetEngine()->HandleEvent(hWindow, msg, wParam, lParam);
}
//-----------------------------------------------------------------
// GameEngine Constructor(s)/Destructor
//-----------------------------------------------------------------
GameEngine::GameEngine(HINSTANCE hInstance, LPTSTR szWindowClass,
LPTSTR szTitle, WORD wIcon, WORD wSmallIcon, int iWidth, int iHeight)
{
// Set the member variables for the game engine
m_pGameEngine = this;
m_hInstance = hInstance;
m_hWindow = NULL;
if (lstrlen(szWindowClass) > 0)
lstrcpy(m_szWindowClass, szWindowClass);
if (lstrlen(szTitle) > 0)
lstrcpy(m_szTitle, szTitle);
m_wIcon = wIcon;
m_wSmallIcon = wSmallIcon;
m_iWidth = iWidth;
m_iHeight = iHeight;
m_iFrameDelay = 50; // 20 FPS default
m_bSleep = TRUE;
m_uiJoystickID = 0;
}
GameEngine::~GameEngine()
{
}
//-----------------------------------------------------------------
// Game Engine General Methods
//-----------------------------------------------------------------
BOOL GameEngine::Initialize(int iCmdShow)
{
WNDCLASSEX wndclass;
// Create the window class for the main window
wndclass.cbSize = sizeof(wndclass);
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = m_hInstance;
wndclass.hIcon = LoadIcon(m_hInstance,
MAKEINTRESOURCE(GetIcon()));
wndclass.hIconSm = LoadIcon(m_hInstance,
MAKEINTRESOURCE(GetSmallIcon()));
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = m_szWindowClass;
// Register the window class
if (!RegisterClassEx(&wndclass))
return FALSE;
// Calculate the window size and position based upon the game size
int iWindowWidth = m_iWidth + GetSystemMetrics(SM_CXFIXEDFRAME) * 2,
iWindowHeight = m_iHeight + GetSystemMetrics(SM_CYFIXEDFRAME) * 2 +
GetSystemMetrics(SM_CYCAPTION);
if (wndclass.lpszMenuName != NULL)
iWindowHeight += GetSystemMetrics(SM_CYMENU);
int iXWindowPos = (GetSystemMetrics(SM_CXSCREEN) - iWindowWidth) / 2,
iYWindowPos = (GetSystemMetrics(SM_CYSCREEN) - iWindowHeight) / 2;
// Create the window
m_hWindow = CreateWindow(m_szWindowClass, m_szTitle, WS_POPUPWINDOW |
WS_CAPTION | WS_MINIMIZEBOX, iXWindowPos, iYWindowPos, iWindowWidth,
iWindowHeight, NULL, NULL, m_hInstance, NULL);
if (!m_hWindow)
return FALSE;
// Show and update the window
ShowWindow(m_hWindow, iCmdShow);
UpdateWindow(m_hWindow);
return TRUE;
}
LRESULT GameEngine::HandleEvent(HWND hWindow, UINT msg, WPARAM wParam, LPARAM lParam)
{
// Route Windows messages to game engine member functions
switch (msg)
{
case WM_CREATE:
// Set the game window and start the game
SetWindow(hWindow);
GameStart(hWindow);
return 0;
case WM_SETFOCUS:
// Activate the game and update the Sleep status
GameActivate(hWindow);
SetSleep(FALSE);
return 0;
case WM_KILLFOCUS:
// Deactivate the game and update the Sleep status
GameDeactivate(hWindow);
SetSleep(TRUE);
return 0;
case WM_PAINT:
HDC hDC;
PAINTSTRUCT ps;
hDC = BeginPaint(hWindow, &ps);
// Paint the game
GamePaint(hDC);
EndPaint(hWindow, &ps);
return 0;
case WM_LBUTTONDOWN:
// Handle left mouse button press
MouseButtonDown(LOWORD(lParam), HIWORD(lParam), TRUE);
return 0;
case WM_LBUTTONUP:
// Handle left mouse button release
MouseButtonUp(LOWORD(lParam), HIWORD(lParam), TRUE);
return 0;
case WM_RBUTTONDOWN:
// Handle right mouse button press
MouseButtonDown(LOWORD(lParam), HIWORD(lParam), FALSE);
return 0;
case WM_RBUTTONUP:
// Handle right mouse button release
MouseButtonUp(LOWORD(lParam), HIWORD(lParam), FALSE);
return 0;
case WM_MOUSEMOVE:
// Handle mouse movement
MouseMove(LOWORD(lParam), HIWORD(lParam));
return 0;
case WM_DESTROY:
// End the game and exit the application
GameEnd();
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hWindow, msg, wParam, lParam);
}
void GameEngine::ErrorQuit(LPTSTR szErrorMsg)
{
MessageBox(GetWindow(), szErrorMsg, TEXT("Critical Error"), MB_OK | MB_ICONERROR);
PostQuitMessage(0);
}
BOOL GameEngine::InitJoystick()
{
// Make sure joystick driver is present
UINT uiNumJoysticks;
if ((uiNumJoysticks = joyGetNumDevs()) == 0)
return FALSE;
// Make sure the joystick is attached
JOYINFO jiInfo;
if (joyGetPos(JOYSTICKID1, &jiInfo) != JOYERR_UNPLUGGED)
m_uiJoystickID = JOYSTICKID1;
else
return FALSE;
// Calculate the trip values
JOYCAPS jcCaps;
joyGetDevCaps(m_uiJoystickID, &jcCaps, sizeof(JOYCAPS));
DWORD dwXCenter = ((DWORD)jcCaps.wXmin + jcCaps.wXmax) / 2;
DWORD dwYCenter = ((DWORD)jcCaps.wYmin + jcCaps.wYmax) / 2;
m_rcJoystickTrip.left = (jcCaps.wXmin + (WORD)dwXCenter) / 2;
m_rcJoystickTrip.right = (jcCaps.wXmax + (WORD)dwXCenter) / 2;
m_rcJoystickTrip.top = (jcCaps.wYmin + (WORD)dwYCenter) / 2;
m_rcJoystickTrip.bottom = (jcCaps.wYmax + (WORD)dwYCenter) / 2;
return TRUE;
}
void GameEngine::CaptureJoystick()
{
// Capture the joystick
if (m_uiJoystickID == JOYSTICKID1)
joySetCapture(m_hWindow, m_uiJoystickID, NULL, TRUE);
}
void GameEngine::ReleaseJoystick()
{
// Release the joystick
if (m_uiJoystickID == JOYSTICKID1)
joyReleaseCapture(m_uiJoystickID);
}
void GameEngine::CheckJoystick()
{
if (m_uiJoystickID == JOYSTICKID1)
{
JOYINFO jiInfo;
JOYSTATE jsJoystickState = 0;
if (joyGetPos(m_uiJoystickID, &jiInfo) == JOYERR_NOERROR)
{
// Check horizontal movement
if (jiInfo.wXpos < (WORD)m_rcJoystickTrip.left)
jsJoystickState |= JOY_LEFT;
else if (jiInfo.wXpos > (WORD)m_rcJoystickTrip.right)
jsJoystickState |= JOY_RIGHT;
// Check vertical movement
if (jiInfo.wYpos < (WORD)m_rcJoystickTrip.top)
jsJoystickState |= JOY_UP;
else if (jiInfo.wYpos > (WORD)m_rcJoystickTrip.bottom)
jsJoystickState |= JOY_DOWN;
// Check buttons
if(jiInfo.wButtons & JOY_BUTTON1)
jsJoystickState |= JOY_FIRE1;
if(jiInfo.wButtons & JOY_BUTTON2)
jsJoystickState |= JOY_FIRE2;
}
// Allow the game to handle the joystick
HandleJoystick(jsJoystickState);
}
}