关于游戏地图滚动的问题，急用啊，高手们帮忙啊

yanfei66 · 发表于 2007-2-13 23:14:00

我正在用WIN32做游戏，可是在地图滚动的时候遇到了问题，代码如下
// pepolewalk.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "resource.h"
#include <ddraw.h>
#include <windows.h>
#include <windowsx.h>

LPDIRECTDRAW dp;
LPDIRECTDRAWSURFACE lpsur;
HINSTANCE hInst;
HDC hdc,mdc,fdc;
HBITMAP bg,people[4],people1[4],bmp;
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
void MyPaint(HDC hdc);
BOOL InitDraw(void);
void FreeDraw(void);
HWND hWnd;
int x,y,dir,num,ht,wh;
DWORD tNow,tPre,tCheck;

int APIENTRY WinMain(HINSTANCE hInstance,
                  HINSTANCE hPrevInstance,
                  LPSTR    lpCmdLine,
                  int    nCmdShow)
{
MSG msg;

MyRegisterClass(hInstance);

if (!InitInstance (hInstance, nCmdShow))
{
return FALSE;
}

if (!InitDraw())
{
MessageBox(GetActiveWindow(),"程序错误","DRAW初始化错误",MB_OK);
FreeDraw();
DestroyWindow(GetActiveWindow());
return FALSE;
}
hdc=GetDC(hWnd);
while (msg.message != WM_QUIT)
{
if(PeekMessage(&msg,NULL,0,0,PM_REMOVE))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
else
{
tNow = GetTickCount();
if(tNow - tPre >= 100)
MyPaint(hdc);
}
}

return msg.wParam;
}

ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEX wcex;

wcex.cbSize = sizeof(WNDCLASSEX);

wcex.style = 0;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = NULL;
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = "people";
wcex.hIconSm = NULL;

return RegisterClassEx(&wcex);
}

BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
//HWND hWnd;

hInst = hInstance; // Store instance handle in our global variable

hWnd = CreateWindow("people", "hg", WS_POPUP,
   0, 0, GetSystemMetrics( SM_CXSCREEN ), GetSystemMetrics(SM_CYSCREEN),
   NULL, NULL, hInst, NULL);

if (!hWnd)
{
   return FALSE;
}

ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);

hdc = GetDC(hWnd);
mdc = CreateCompatibleDC(hdc);
fdc = CreateCompatibleDC(hdc);

bg = (HBITMAP)LoadImage(NULL,"map/bg.bmp",IMAGE_BITMAP,2048,1536,LR_LOADFROMFILE);
people[0] = (HBITMAP)LoadImage(NULL,"people/mawenbo/mawenbo1.bmp",IMAGE_BITMAP,200,75,LR_LOADFROMFILE);
people[1] = (HBITMAP)LoadImage(NULL,"people/mawenbo/mawenbo2.bmp",IMAGE_BITMAP,200,75,LR_LOADFROMFILE);
people[2] = (HBITMAP)LoadImage(NULL,"people/mawenbo/mawenbo3.bmp",IMAGE_BITMAP,200,75,LR_LOADFROMFILE);
people[3] = (HBITMAP)LoadImage(NULL,"people/mawenbo/mawenbo4.bmp",IMAGE_BITMAP,200,75,LR_LOADFROMFILE);
people1[0] = (HBITMAP)LoadImage(NULL,"people/mawenbo/mab1.bmp",IMAGE_BITMAP,200,75,LR_LOADFROMFILE);
people1[1] = (HBITMAP)LoadImage(NULL,"people/mawenbo/mab2.bmp",IMAGE_BITMAP,200,75,LR_LOADFROMFILE);
people1[2] = (HBITMAP)LoadImage(NULL,"people/mawenbo/mab3.bmp",IMAGE_BITMAP,200,75,LR_LOADFROMFILE);
people1[3] = (HBITMAP)LoadImage(NULL,"people/mawenbo/mab4.bmp",IMAGE_BITMAP,200,75,LR_LOADFROMFILE);
bmp = CreateCompatibleBitmap(hdc,1024,768);
SelectObject(mdc,bmp);

x = 300;
y = 200;
dir = 3;
num = 0;
ht = 0;
wh = 0;
//MyPaint(hdc);

return TRUE;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
PAINTSTRUCT ps;
//HDC hdc;
// RECT a;

switch (message)
{
      case WM_KEYDOWN:
switch(wParam)
{
case VK_ESCAPE:
PostMessage(hWnd,WM_CLOSE,0,0);
break;

case VK_UP:
switch(dir)
{
case 0:
y -= 10;
break;
case 1:
//x -= 1;
//y -= 8;
break;
case 2:
//x += 2;
//y -= 10;
break;
case 3:
//x += 2;
//y -= 10;
break;
}
if(y < 0)
y = 0;
dir = 0;

if(y < 30)
{
ht -= 10;
if( ht < 0)
ht = 0;
}
break;

case VK_DOWN:
switch(dir)
{
case 0:
//x += 1;
//y += 8;
break;
case 1:
y += 10;
break;
case 2:
//x += 3;
//y += 6;
break;
case 3:
//x += 3;
//y += 6;
break;
}
if(y > 1490)
y = 1490;
dir = 1;

if(y > 1490)
{
ht += 10;
if( ht > 600)
ht = 600;
}
break;

case VK_LEFT:
switch(dir)
{
case 0:
//y -= 12;
break;
case 1:
//x -= 13;
//y += 4;
break;
case 2:
x -= 10;
break;
case 3:

//y -= 5;
break;
}
if(x < 10)
x = 0;
dir = 2;

if(x < 30)
{
wh -= 10;
if( wh < 0)
wh = 0;
}
break;

case VK_RIGHT:
switch(dir)
{
case 0:
//x += 8;
break;
case 1:
//x += 7;
//y += 4;
break;
case 2:
// x += 10;
break;
case 3:
x += 10;
break;
}
if(x > 970)
x = 970;
dir = 3;

if(x > 940)
{
wh += 10;
if( wh > 500)
wh = 500;
}
break;
}

/* a.top=0;
a.bottom=768;
a.left=0;
a.right=1024;
InvalidateRect(hWnd,&a,FALSE);
break;
*/
case WM_PAINT:
BeginPaint(hWnd, &ps);
// MyPaint(hdc);
EndPaint(hWnd, &ps);
break;

case WM_DESTROY:
int i;
DeleteDC(mdc);
DeleteDC(fdc);
for(i = 0;i < 4;i++)
{
DeleteObject(people);
DeleteObject(people1);
}
ReleaseDC(hWnd,hdc);
PostQuitMessage(0);
break;

default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}

BOOL InitDraw()
{
DDSURFACEDESC dds;

if(DirectDrawCreate(NULL,&dp,NULL) != DD_OK)
return FALSE;

if(dp->SetCooperativeLevel(GetActiveWindow(),
DDSCL_EXCLUSIVE | DDSCL_FULLSCREEN )!= DD_OK)
return FALSE;

if(dp->SetDisplayMode(1024,768,16) != DD_OK)
return FALSE;

dds.dwSize = sizeof(dds);
dds.dwFlags = DDSD_CAPS;
dds.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;

if(dp->CreateSurface(&dds,&lpsur,NULL) != DD_OK)
return FALSE;

// if(lpsur->GetDC(&hdc) != DD_OK)
// return FALSE;

//MyPaint(hdc);
//MessageBox(hWnd,"dd","dd",MB_OK);

lpsur->ReleaseDC(hdc);

return TRUE;
}

void FreeDraw()
{
if(dp != NULL)
{
if(lpsur != NULL)
{
lpsur->Release();
lpsur = NULL;
}
dp->Release();
dp = NULL;
}
}

void MyPaint(HDC hdc)
{
int w, h;

SelectObject(fdc,bg);
BitBlt(mdc,0,0,1024,768,fdc,wh,ht,SRCCOPY);

SelectObject(fdc,people1[dir]);
//SelectObject(cdc,people[dir]);
switch(dir)
{
case 0:
w = 50;
h = 75;
break;
case 1:
w = 50;
h = 75;
break;
case 2:
w = 50;
h = 75;
break;
case 3:
w = 50;
h = 75;
break;
}
BitBlt(mdc,x,y,w,h,fdc,num*w,0,SRCAND);
SelectObject(fdc,people[dir]);
BitBlt(mdc,x,y,w,h,fdc,num*w,0,SRCPAINT);
BitBlt(hdc,0,0,1024,768,mdc,0,0,SRCCOPY);

tPre = GetTickCount();

Sleep(70);

num ++;

if(num == 4)
num = 0;

}

我想在地图上设置一些不能走动的地方，我设置了一个二维数组，但是在画面滚动后却不能将滚动过来的画面设置一些不能走动的地方，一位人物到屏幕边缘后坐标就不发生变化了，很难用坐标进行判断，请各位高手赐教啊，现在急用！！！
如有需要我可以上传原程序~~~

AsEngineDev · 发表于 2007-2-14 02:01:00

关于这个问题，建议你去《Windows游戏编程大师技巧》里面有个例子，可以好好参考一下。你的代码结构写的很差，建议，你多话的时间去读前面部分。
代码如下：
// DEMO8_11_16b.CPP - Smooth scrolling demo
// 16-bit version
// make certain to include the T3DLIB1.CPP source file!
// and this is a windowed demo, so you MUST be in 16-bit mode

// INCLUDES ///////////////////////////////////////////////

#define WIN32_LEAN_AND_MEAN

// you must #define INITGUID if not done elsewhere
#define INITGUID

#include <windows.h> // include important windows stuff
#include <windowsx.h>
#include <mmsystem.h>
#include <objbase.h>
#include <iostream.h> // include important C/C++ stuff
#include <conio.h>
#include <stdlib.h>
#include <malloc.h>
#include <memory.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <math.h>
#include <io.h>
#include <fcntl.h>

#include <ddraw.h>    // directX includes
#include "T3DLIB1.H"

// DEFINES ////////////////////////////////////////////////

// defines for windows
#define WINDOW_CLASS_NAME "WINCLASS1"

// setup a 640x480 16-bit windowed mode example
#define WINDOW_TITLE    "16-Bit Smooth Scrolling Demo"
#define WINDOW_WIDTH    640 // size of window
#define WINDOW_HEIGHT    480

#define WINDOW_BPP       16 // bitdepth of window (8,16,24 etc.)
                              // note: if windowed and not
                              // fullscreen then bitdepth must
                              // be same as system bitdepth
                              // also if 8-bit the a pallete
                              // is created and attached

#define WINDOWED_APP    1    // 0 not windowed, 1 windowed

#define BITMAP_ID          0x4D42 // universal id for a bitmap
#define MAX_COLORS_PALETTE 256

#define NUM_TEXTURES       10 // normally this would be a multiple of 16 or something!

// PROTOTYPES /////////////////////////////////////////////

// game console
int Game_Init(void *parms=NULL, int num_parms = 0);
int Game_Shutdown(void *parms=NULL, int num_parms = 0);
int Game_Main(void *parms=NULL,  int num_parms = 0);

// GLOBALS ////////////////////////////////////////////////

// windows vars
HWND    main_window_handle = NULL; // globally track main window
int    window_closed    = 0; // tracks if window is closed
HINSTANCE main_instance    = NULL; // globally track hinstance

char buffer[80];             // used to print text

// demo globals
BOB       textures;    // texture memory

int world_x = 0, // current position of viewing window
world_y = 0;

// use an array of string pointers, could have used an
// array of chars or int, but harder to initialize
// the characters '0' - '9' represent bitmaps 0-9 in some texture memory
char *world[21] =
{
"111111111111111111111111111111",
"100000000000000000000000000001",
"100002222220000000000000077701",
"100002222223333333333000077701",
"100002222227777777773000070001",
"100002222227777777773000070001",
"100000000377777777773000070001",
"107777700377777777773000070001",
"177777770377777777773000770001",
"107777700377777777773007700001",
"100777770377777777773777000001",
"100000707377777777773000000001",
"100007777377777777773000000001",
"100000000302222777773000000001",
"100000000332222777773000000001",
"100000000002222333333000000001",
"100000666666666666666666600001",
"100000800000000000000000800001",
"100000800000000000000000800001",
"100000000000000000000000000001",
"111111111111111111111111111111",

};

// PROTOTYPES //////////////////////////////////////////////

LRESULT CALLBACK WindowProc(HWND hwnd,
      UINT msg,
                        WPARAM wparam,
                        LPARAM lparam)
{
// this is the main message handler of the system
PAINTSTRUCT ps; // used in WM_PAINT
HDC hdc; // handle to a device context
char buffer[80];       // used to print strings

// what is the message
switch(msg)
{
case WM_CREATE:
      {
// do initialization stuff here
      // return success
return(0);
} break;

case WM_PAINT:
{
// simply validate the window
         hdc = BeginPaint(hwnd,&ps);

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

      // return success
return(0);
   } break;

case WM_DESTROY:
{

// kill the application, this sends a WM_QUIT message
PostQuitMessage(0);

      // return success
return(0);
} break;

default:break;

} // end switch

// process any messages that we didn't take care of
return (DefWindowProc(hwnd, msg, wparam, lparam));

} // end WinProc

// WINMAIN ////////////////////////////////////////////////

int WINAPI WinMain( HINSTANCE hinstance,
HINSTANCE hprevinstance,
LPSTR lpcmdline,
int ncmdshow)
{

WNDCLASSEX winclass; // this will hold the class we create
HWND    hwnd;    // generic window handle
MSG    msg;    // generic message
HDC       hdc;    // graphics device context

// first fill in the window class stucture
winclass.cbSize       = sizeof(WNDCLASSEX);
winclass.style = CS_DBLCLKS | CS_OWNDC |
                        CS_HREDRAW | CS_VREDRAW;
winclass.lpfnWndProc = WindowProc;
winclass.cbClsExtra = 0;
winclass.cbWndExtra = 0;
winclass.hInstance = hinstance;
winclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
winclass.hCursor = LoadCursor(NULL, IDC_ARROW);
winclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
winclass.lpszMenuName = NULL;
winclass.lpszClassName = WINDOW_CLASS_NAME;
winclass.hIconSm       = LoadIcon(NULL, IDI_APPLICATION);

// save hinstance in global
main_instance = hinstance;

// register the window class
if (!RegisterClassEx(&winclass))
return(0);

// create the window
if (!(hwnd = CreateWindowEx(NULL,                // extended style
                        WINDOW_CLASS_NAME,    // class
      WINDOW_TITLE, // title
      (WINDOWED_APP ? (WS_OVERLAPPED | WS_SYSMENU | WS_CAPTION) : (WS_POPUP | WS_VISIBLE)),
           0,0,    // initial x,y
      WINDOW_WIDTH,WINDOW_HEIGHT,  // initial width, height
      NULL,    // handle to parent
      NULL,    // handle to menu
      hinstance,// instance of this application
      NULL))) // extra creation parms
return(0);

// save main window handle
main_window_handle = hwnd;

if (WINDOWED_APP)
{
// now resize the window, so the client area is the actual size requested
// since there may be borders and controls if this is going to be a windowed app
// if the app is not windowed then it won't matter
RECT window_rect = {0,0,WINDOW_WIDTH-1,WINDOW_HEIGHT-1};

// make the call to adjust window_rect
AdjustWindowRectEx(&window_rect,
   GetWindowStyle(main_window_handle),
   GetMenu(main_window_handle) != NULL,
   GetWindowExStyle(main_window_handle));

// save the global client offsets, they are needed in DDraw_Flip()
window_client_x0 = -window_rect.left;
window_client_y0 = -window_rect.top;

// now resize the window with a call to MoveWindow()
MoveWindow(main_window_handle,
         0, // x position
         0, // y position
         window_rect.right - window_rect.left, // width
         window_rect.bottom - window_rect.top, // height
         TRUE);

// show the window, so there's no garbage on first render
ShowWindow(main_window_handle, SW_SHOW);
} // end if windowed

// initialize game here
Game_Init();

// enter main event loop
while(TRUE)
{
// test if there is a message in queue, if so get it
if (PeekMessage(&msg,NULL,0,0,PM_REMOVE))
   {
   // test if this is a quit
   if (msg.message == WM_QUIT)
         break;

   // translate any accelerator keys
   TranslateMessage(&msg);

   // send the message to the window proc
   DispatchMessage(&msg);
   } // end if

   // main game processing goes here
   Game_Main();

} // end while

// closedown game here
Game_Shutdown();

// return to Windows like this
return(msg.wParam);

} // end WinMain

// GAME PROGRAMMING CONSOLE FUNCTIONS ////////////////

int Game_Init(void *parms,  int num_parms)
{
// this function is where you do all the initialization
// for your game

int index;       // looping var
char filename[80]; // used to build up files names

// start up DirectDraw (replace the parms as you desire)
DDraw_Init(WINDOW_WIDTH, WINDOW_HEIGHT, WINDOW_BPP, WINDOWED_APP);

// load in texture maps
Load_Bitmap_File(&bitmap16bit, "SCROLLTEXTURES_24.BMP");

// create the texture bob
if (!Create_BOB(&textures,0,0,64,64,10,
            BOB_ATTR_VISIBLE | BOB_ATTR_MULTI_FRAME,DDSCAPS_SYSTEMMEMORY,0,16))
return(0);

// load each texture bitmap into the texture BOB object
for (index = 0; index < NUM_TEXTURES; index++)
Load_Frame_BOB16(&textures,&bitmap16bit,index,index%4,index/4,BITMAP_EXTRACT_MODE_CELL);

// unload the texture map bitmap
Unload_Bitmap_File(&bitmap16bit);

// hide the mouse
if (!WINDOWED_APP)
ShowCursor(FALSE);

// return success
return(1);

} // end Game_Init

///////////////////////////////////////////////////////////

int Game_Shutdown(void *parms,  int num_parms)
{
// this function is where you shutdown your game and
// release all resources that you allocated

// kill texture memory
Destroy_BOB(&textures);

// shutdonw directdraw
DDraw_Shutdown();

// return success
return(1);
} // end Game_Shutdown

///////////////////////////////////////////////////////////

int Game_Main(void *parms, int num_parms)
{
// this is the workhorse of your game it will be called
// continuously in real-time this is like main() in C
// all the calls for you game go here!

int index, index_x, index_y;  // looping vars
int start_map_x,start_map_y,  // map positions
end_map_x,end_map_y;

int offset_x, offset_y;    // pixel offsets within cell

// check of user is trying to exit
if (KEY_DOWN(VK_ESCAPE) || KEY_DOWN(VK_SPACE))
PostMessage(main_window_handle, WM_DESTROY,0,0);

// start the timing clock
Start_Clock();

// clear the drawing surface
DDraw_Fill_Surface(lpddsback, 0);

// check for movement (scrolling)
if (KEY_DOWN(VK_RIGHT))
{
if ((world_x+=4) >= 1280)
   world_x = 1279;

} // end if
else
if (KEY_DOWN(VK_LEFT))
{
if ((world_x-=4) < 0)
   world_x = 0;

} // end if

if (KEY_DOWN(VK_UP))
{
if ((world_y-=4) < 0)
   world_y = 0;

} // end if
else
if (KEY_DOWN(VK_DOWN))
{
if ((world_y+=4) >= 896)
   world_y = 895;

} // end if

// compute starting map indices by dividing position by size of cell
start_map_x = world_x/64; // use >> 6 for speed, but this is clearer
start_map_y = world_y/64;

// compute end of map rectangle for best cast i.e. aligned on 64x64 boundary
end_map_x = start_map_x + 10 - 1;
end_map_y = start_map_y + 8 - 1;

// now compute number of pixels in x,y we are within the tile, i.e
// how much is scrolled off the edge?
offset_x = -(world_x % 64);
offset_y = -(world_y % 64);

// adjust end_map_x,y for offsets
if (offset_x)
end_map_x++;

if (offset_y)
end_map_y++;

// set starting position of first upper lh texture
int texture_x = offset_x;
int texture_y = offset_y;

// draw the current window
for (index_y = start_map_y; index_y <= end_map_y; index_y++)
{
for (index_x = start_map_x; index_x <= end_map_x; index_x++)
      {
      // set position to blit
      textures.x = texture_x;
      textures.y = texture_y;

      // set frame
      textures.curr_frame = world[index_y][index_x] - '0';

      // draw the texture
      Draw_BOB16(&textures,lpddsback);

      // update texture position
      texture_x+=64;

      } // end for map_x

// reset x postion, update y
texture_x =  offset_x;
texture_y += 64;

} // end for map_y

// draw some info
Draw_Text_GDI("(16-Bit Version) USE ARROW KEYS TO MOVE, <ESC> to Exit.",8,8,RGB(255,255,255),lpddsback);

sprintf(buffer,"World Position = [%d, %d]    ", world_x, world_y);
Draw_Text_GDI(buffer,8,screen_height - 32 - 24,RGB(0,255,0),lpddsback);

// flip the surfaces
DDraw_Flip();

// sync to 30 fps
Wait_Clock(30);

// return success
return(1);

} // end Game_Main

//////////////////////////////////////////////////////////

baickl · 发表于 2007-2-15 12:15:00

靠，帖这么一大堆代码。都没有格式和高亮。。论坛真该改改版了。

紫涩雪 · 发表于 2007-2-15 20:01:00

描述下算法~~
就好了~~~

代码就不用了~~~~~

千里马肝 · 发表于 2007-2-26 17:29:00

关键是思想
其实学过3D再回头玩2D就会觉得很简单了
你目前应该是受屏幕坐标所困扰
需要的是跳出屏幕这个局限
试着去理解一个新的概念叫做世界坐标

yanfei66 · 发表于 2007-2-26 21:10:00

麻烦问一下千里马肝,您所说的问题正是我现在比较困惑的,你可以给我介绍一下你所说的世界地图应该去参考哪方面的资料?谢谢

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关于游戏地图滚动的问题，急用啊，高手们帮忙啊

Re:关于游戏地图滚动的问题，急用啊，高手们帮忙啊

Re:关于游戏地图滚动的问题，急用啊，高手们帮忙啊

Re:关于游戏地图滚动的问题，急用啊，高手们帮忙啊

Re:关于游戏地图滚动的问题，急用啊，高手们帮忙啊

Re:关于游戏地图滚动的问题，急用啊，高手们帮忙啊