Isometric Game Programming with DirectX 7.0/Isometric Game Programming.iso/source/chapter2/isohex2_3/isohex2_3.cpp

C/C++ Source or Header | 2000-05-12 | 6KB | 261 lines

/*****************************************************************************
IsoHex2_3.cpp
Ernest S. Pazera
12MAY2000
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 "ISOHEX2"
//title of the application
#define WINDOWTITLE "IsoHex 2-3"

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

//////////////////////////////////////////////////////////////////////////////
//GLOBALS
//////////////////////////////////////////////////////////////////////////////
HINSTANCE hInstMain=NULL;//main application handle
HWND hWndMain=NULL;//handle to our main window
HPEN hpenNew=NULL;//new pen
HPEN hpenOld=NULL;//old pen

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

            //borrow the main window's DC
            HDC hdc=GetDC(hWndMain);

            //update the CP
            MoveToEx(hdc,x,y,NULL);

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

            //handled, return 0
            return(0);
        }break;
    case WM_MOUSEMOVE:
        {
            //if left button is down
            if(wParam & MK_LBUTTON)
            {
                //extract x and y from lparam
                int x=LOWORD(lParam);
                int y=HIWORD(lParam);

                //borrow the main window's DC
                HDC hdc=GetDC(hWndMain);

                //line to the x,y position
                LineTo(hdc,x,y);

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

            //handled, 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
            /////////////////////////////

            //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()
{
    //create the new pen
    hpenNew=CreatePen(PS_SOLID,0,RGB(255,255,255));

    //borrow dc from main window
    HDC hdc=GetDC(hWndMain);

    //select new pen into dc
    hpenOld=(HPEN)SelectObject(hdc,hpenNew);

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

    return(true);//return success
}

//////////////////////////////////////////////////////////////////////////////
//CLEANUP
//////////////////////////////////////////////////////////////////////////////
void Prog_Done()
{
    //borrow dc from main window
    HDC hdc=GetDC(hWndMain);

    //restore old pen to dc
    SelectObject(hdc,hpenOld);

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

    //delete new pen
    DeleteObject(hpenNew);
}

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