Isometric Game Programming with DirectX 7.0/Isometric Game Programming.iso/source/chapter3/isohex3_5/isohex3_5.cpp

C/C++ Source or Header | 2000-05-18 | 6.4 KB | 269 lines

/*****************************************************************************
IsoHex3_5.cpp
Ernest S. Pazera
18MAY2000
Start a WIN32 Application Workspace, add in this file
No other libs are required
*****************************************************************************/

//////////////////////////////////////////////////////////////////////////////
//INCLUDES
//////////////////////////////////////////////////////////////////////////////
#define WIN32_LEAN_AND_MEAN

#include <windows.h>

//////////////////////////////////////////////////////////////////////////////
//DEFINES
//////////////////////////////////////////////////////////////////////////////
//name for our window class
#define WINDOWCLASS "ISOHEX3"
//title of the application
#define WINDOWTITLE "IsoHex 3-5"

//bitmap sizes
const int BITMAPHEIGHT=32;
const int BITMAPWIDTH=64;

//////////////////////////////////////////////////////////////////////////////
//PROTOTYPES
//////////////////////////////////////////////////////////////////////////////
bool Prog_Init();//game data initalizer
void Prog_Loop();//main game loop
void Prog_Done();//game clean up

//show the cursor
void ShowTheCursor(HDC hdc);

//////////////////////////////////////////////////////////////////////////////
//GLOBALS
//////////////////////////////////////////////////////////////////////////////
HINSTANCE hInstMain=NULL;//main application handle
HWND hWndMain=NULL;//handle to our main window
//memory dc
HDC hdcMem=NULL;
//bitmaps
HBITMAP hbmNew=NULL;
HBITMAP hbmOld=NULL;
//cursor location
POINT ptCursor;

//////////////////////////////////////////////////////////////////////////////
//WINDOWPROC
//////////////////////////////////////////////////////////////////////////////
LRESULT CALLBACK TheWindowProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
    //which message did we get?
    switch(uMsg)
    {
    case WM_MOUSEMOVE:
        {
            //extract x and y from lParam
            int x=LOWORD(lParam);
            int y=HIWORD(lParam);

            //borrow window's dc
            HDC hdc=GetDC(hWndMain);

            //write the cursor
            ShowTheCursor(hdc);

            //update the cursor position
            ptCursor.x=x;
            ptCursor.y=y;

            //write the cursor
            ShowTheCursor(hdc);

            //return dc to system
            ReleaseDC(hWndMain,hdc);

            //handled, so return 0
            return(0);
        }break;
    case WM_DESTROY://the window is being destroyed
        {

            //tell the application we are quitting
            PostQuitMessage(0);

            //handled message, so return 0
            return(0);

        }break;
    case WM_PAINT://the window needs repainting
        {
            //a variable needed for painting information
            PAINTSTRUCT ps;

            //start painting
            HDC hdc=BeginPaint(hwnd,&ps);

            /////////////////////////////
            //painting code would go here
            /////////////////////////////
            ShowTheCursor(hdc);

            //end painting
            EndPaint(hwnd,&ps);

            //handled message, so return 0
            return(0);
        }break;
    }

    //pass along any other message to default message handler
    return(DefWindowProc(hwnd,uMsg,wParam,lParam));
}


//////////////////////////////////////////////////////////////////////////////
//WINMAIN
//////////////////////////////////////////////////////////////////////////////
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nShowCmd)
{
    //assign instance to global variable
    hInstMain=hInstance;

    //create window class
    WNDCLASSEX wcx;

    //set the size of the structure
    wcx.cbSize=sizeof(WNDCLASSEX);

    //class style
    wcx.style=CS_OWNDC | CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;

    //window procedure
    wcx.lpfnWndProc=TheWindowProc;

    //class extra
    wcx.cbClsExtra=0;

    //window extra
    wcx.cbWndExtra=0;

    //application handle
    wcx.hInstance=hInstMain;

    //icon
    wcx.hIcon=LoadIcon(NULL,IDI_APPLICATION);

    //cursor
    wcx.hCursor=LoadCursor(NULL,IDC_ARROW);

    //background color
    wcx.hbrBackground=(HBRUSH)GetStockObject(BLACK_BRUSH);

    //menu
    wcx.lpszMenuName=NULL;

    //class name
    wcx.lpszClassName=WINDOWCLASS;

    //small icon
    wcx.hIconSm=NULL;

    //register the window class, return 0 if not successful
    if(!RegisterClassEx(&wcx)) return(0);

    //create main window
    hWndMain=CreateWindowEx(0,WINDOWCLASS,WINDOWTITLE, WS_BORDER | WS_SYSMENU | WS_VISIBLE,0,0,320,240,NULL,NULL,hInstMain,NULL);

    //error check
    if(!hWndMain) return(0);

    //if program initialization failed, then return with 0
    if(!Prog_Init()) return(0);

    //message structure
    MSG msg;

    //message pump
    for(;;)
    {
        //look for a message
        if(PeekMessage(&msg,NULL,0,0,PM_REMOVE))
        {
            //there is a message

            //check that we arent quitting
            if(msg.message==WM_QUIT) break;

            //translate message
            TranslateMessage(&msg);

            //dispatch message
            DispatchMessage(&msg);
        }

        //run main game loop
        Prog_Loop();
    }

    //clean up program data
    Prog_Done();

    //return the wparam from the WM_QUIT message
    return(msg.wParam);
}

//////////////////////////////////////////////////////////////////////////////
//INITIALIZATION
//////////////////////////////////////////////////////////////////////////////
bool Prog_Init()
{
    //borrow dc from main window
    HDC hdc=GetDC(hWndMain);

    //create a memory dc
    hdcMem=CreateCompatibleDC(hdc);

    //load in the bitmap
    hbmNew=(HBITMAP)LoadImage(NULL,"IsoHex3_5.bmp",IMAGE_BITMAP,0,0,LR_LOADFROMFILE);

    //select bitmap into memory dc
    hbmOld=(HBITMAP)SelectObject(hdcMem,hbmNew);

    //set original cursor position
    ptCursor.x=0;
    ptCursor.y=0;

    //return dc to system
    ReleaseDC(hWndMain,hdc);

    return(true);//return success
}

//////////////////////////////////////////////////////////////////////////////
//CLEANUP
//////////////////////////////////////////////////////////////////////////////
void Prog_Done()
{
    //restore old bitmap to memory dc
    SelectObject(hdcMem,hbmOld);

    //delete bitmap
    DeleteObject(hbmNew);

    //delete dc
    DeleteDC(hdcMem);
}

//////////////////////////////////////////////////////////////////////////////
//MAIN GAME LOOP
//////////////////////////////////////////////////////////////////////////////
void Prog_Loop()
{
    ///////////////////////////
    //main game logic goes here
    ///////////////////////////
}

//show the cursor
void ShowTheCursor(HDC hdc)
{
    BitBlt(hdc,ptCursor.x-BITMAPWIDTH/2,ptCursor.y-BITMAPHEIGHT/2,BITMAPWIDTH,BITMAPHEIGHT,hdcMem,0,0,SRCINVERT);
}