Isometric Game Programming with DirectX 7.0/Isometric Game Programming.iso/source/chapter12/isohex12_2/isohex12_2.cpp

C/C++ Source or Header | 2000-07-09 | 9.9 KB | 379 lines

/*****************************************************************************
IsoHex12_2.cpp
Ernest S. Pazera
08JUL2000
Start a WIN32 Application Workspace, add in this file
Requires ddraw.lib and dxguid.lib
Needs DDFuncs.h/cpp, GDICanvas.h/cpp, and TileSet.h/cpp
*****************************************************************************/

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

#include <windows.h>
#include "TileSet.h"

//////////////////////////////////////////////////////////////////////////////
//DEFINES
//////////////////////////////////////////////////////////////////////////////
//name for our window class
#define WINDOWCLASS "ISOHEX12"
//title of the application
#define WINDOWTITLE "IsoHex 12-2"

//map dimensions
const int MAPWIDTH=20;
const int MAPHEIGHT=40;

//////////////////////////////////////////////////////////////////////////////
//PROTOTYPES
//////////////////////////////////////////////////////////////////////////////
bool Prog_Init();//game data initalizer
void Prog_Loop();//main game loop
void Prog_Done();//game clean up
POINT SlideMap_TilePlotter(POINT ptMap,int iTileWidth,int iTileHeight);
void SetUpSpaces();//sets up spaces
void SetUpMap();
void DrawMap();

//////////////////////////////////////////////////////////////////////////////
//GLOBALS
//////////////////////////////////////////////////////////////////////////////
HINSTANCE hInstMain=NULL;//main application handle
HWND hWndMain=NULL;//handle to our main window
LPDIRECTDRAW7 lpdd=NULL;//directdraw
LPDIRECTDRAWSURFACE7 lpddsMain=NULL;//primary surface
LPDIRECTDRAWSURFACE7 lpddsBack=NULL;//back buffer
LPDIRECTDRAWCLIPPER lpddClipper=NULL;//clipper
CTileSet tsIso;//tileset
int iTileMap[MAPWIDTH][MAPHEIGHT];

//spaces
RECT rcWorldSpace;//worldspace
RECT rcScreenSpace;//screen space(also, view space)
RECT rcAnchorSpace;//anchor space
POINT ptScreenAnchor;//screen anchor


//////////////////////////////////////////////////////////////////////////////
//WINDOWPROC
//////////////////////////////////////////////////////////////////////////////
LRESULT CALLBACK TheWindowProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
    //which message did we get?
    switch(uMsg)
    {
    case WM_KEYDOWN:
        {
            //if escape hit, destroy window
            if(wParam==VK_ESCAPE) DestroyWindow(hWndMain);
            //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
            /////////////////////////////

            //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_POPUP | 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()
{
    //set up ddraw
    lpdd=LPDD_Create(hWndMain,DDSCL_FULLSCREEN | DDSCL_EXCLUSIVE | DDSCL_ALLOWREBOOT);
    lpdd->SetDisplayMode(640,480,16,0,0);

    //set up primary surface
    lpddsMain=LPDDS_CreatePrimary(lpdd,1);

    //set up back buffer
    lpddsBack=LPDDS_GetSecondary(lpddsMain);

    //create clipper
    lpdd->CreateClipper(0,&lpddClipper,NULL);
    lpddClipper->SetHWnd(0,hWndMain);
    lpddsBack->SetClipper(lpddClipper);

    //load in tileset
    tsIso.Load(lpdd,"IsoHex12_2.bmp");

    //set up spaces
    SetUpSpaces();

    //set up the tilemap
    SetUpMap();

    return(true);//return success
}

//////////////////////////////////////////////////////////////////////////////
//CLEANUP
//////////////////////////////////////////////////////////////////////////////
void Prog_Done()
{
    //clean up clipper
    LPDDCLIP_Release(&lpddClipper);
    //clean up primary surface
    LPDDS_Release(&lpddsMain);
    //clean up ddraw
    LPDD_Release(&lpdd);
}

//////////////////////////////////////////////////////////////////////////////
//MAIN GAME LOOP
//////////////////////////////////////////////////////////////////////////////
void Prog_Loop()
{
    //check for keys, and adjust screen anchor
    //up
    if(GetAsyncKeyState(VK_UP)<0)
    {
        if(ptScreenAnchor.y>rcAnchorSpace.top) ptScreenAnchor.y--;
    }
    //down
    if(GetAsyncKeyState(VK_DOWN)<0)
    {
        if(ptScreenAnchor.y<rcAnchorSpace.bottom) ptScreenAnchor.y++;
    }
    //right
    if(GetAsyncKeyState(VK_RIGHT)<0)
    {
        if(ptScreenAnchor.x<rcAnchorSpace.right) ptScreenAnchor.x++;
    }
    //left
    if(GetAsyncKeyState(VK_LEFT)<0)
    {
        if(ptScreenAnchor.x>rcAnchorSpace.left) ptScreenAnchor.x--;
    }

    //clear out back buffer
    DDBLTFX ddbltfx;
    DDBLTFX_ColorFill(&ddbltfx,0);
    lpddsBack->Blt(NULL,NULL,NULL,DDBLT_WAIT | DDBLT_COLORFILL,&ddbltfx);

    //show the board
    DrawMap();
    //flip
    lpddsMain->Flip(NULL,DDFLIP_WAIT);
}

POINT SlideMap_TilePlotter(POINT ptMap,int iTileWidth,int iTileHeight)
{
    POINT ptReturn;
    //calculate pixel position for the map position given
    ptReturn.x=ptMap.x*iTileWidth+ptMap.y*iTileWidth/2;
    ptReturn.y=ptMap.y*iTileHeight/2;
    //return calculate point
    return(ptReturn);
}

void SetUpMap()
{
    //randomly set up the map
    for(int x=0;x<MAPWIDTH;x++)
    {
        for(int y=0;y<MAPHEIGHT;y++)
        {
            iTileMap[x][y]=rand()%(tsIso.GetTileCount());
        }
    }
}

void DrawMap()
{
    POINT ptTile;//tile pixel coordinate
    POINT ptMap;//map coordinate
    //get tile width and height
    int iTileWidth=tsIso.GetTileList()[0].rcSrc.right-tsIso.GetTileList()[0].rcSrc.left;
    int iTileHeight=tsIso.GetTileList()[0].rcSrc.bottom-tsIso.GetTileList()[0].rcSrc.top;
    //the y loop is outside, because we must blit in horizontal rows
    for(int y=0;y<MAPHEIGHT;y++)
    {
        for(int x=0;x<MAPWIDTH;x++)
        {
            //get pixel coordinate for map position
            ptMap.x=x;
            ptMap.y=y;
            ptTile=SlideMap_TilePlotter(ptMap,iTileWidth,iTileHeight);
            //plot the tile(adjust for anchor)
            tsIso.PutTile(lpddsBack,ptTile.x-ptScreenAnchor.x,ptTile.y-ptScreenAnchor.y,iTileMap[x][y]);
        }
    }
}

void SetUpSpaces()
{
    //set up screen space
    SetRect(&rcScreenSpace,0,0,640,480);

    //get a few metrics from the tileset
    int iTileWidth=tsIso.GetTileList()[0].rcDstExt.right-tsIso.GetTileList()[0].rcDstExt.left;
    int iTileHeight=tsIso.GetTileList()[0].rcDstExt.bottom-tsIso.GetTileList()[0].rcDstExt.top;

    //grab tile rectangle from tileset
    RECT rcTile1;
    RECT rcTile2;
    POINT ptPlot;
    POINT ptMap;

    //grab tiles from extents
    CopyRect(&rcTile1,&tsIso.GetTileList()[0].rcDstExt);
    CopyRect(&rcTile2,&tsIso.GetTileList()[0].rcDstExt);

    //move first tile to upper left position
    ptMap.x=0;
    ptMap.y=0;
    ptPlot=SlideMap_TilePlotter(ptMap,iTileWidth,iTileHeight);
    OffsetRect(&rcTile1,ptPlot.x,ptPlot.y);

    //move first tile to lower right position
    ptMap.x=MAPWIDTH-1;
    ptMap.y=MAPHEIGHT-1;
    ptPlot=SlideMap_TilePlotter(ptMap,iTileWidth,iTileHeight);
    OffsetRect(&rcTile2,ptPlot.x,ptPlot.y);

    //combine these two tiles into world space
    UnionRect(&rcWorldSpace,&rcTile1,&rcTile2);

    //copy worldspace to anchor space
    CopyRect(&rcAnchorSpace,&rcWorldSpace);

    //subtract out screenspace
    //adjust right edge
    rcAnchorSpace.right-=(rcScreenSpace.right-rcScreenSpace.left);
    //make sure right not less than left
    if(rcAnchorSpace.right<rcAnchorSpace.left) rcAnchorSpace.right=rcAnchorSpace.left;
    //adjust bottom edge
    rcAnchorSpace.bottom-=(rcScreenSpace.bottom-rcScreenSpace.top);
    //make sure bottom not less than top
    if(rcAnchorSpace.bottom<rcAnchorSpace.top) rcAnchorSpace.bottom=rcAnchorSpace.top;

    //initialize screen anchor
    ptScreenAnchor.x=0;
    ptScreenAnchor.y=0;
}