C++ “Game” Snippet | BASeCamp Programming Blog

#include "stdafx.h"
#include "fightseeker.h"
#include <random>
#include <iostream>
#define MAX_LOADSTRING 100

// Global Variables:
HINSTANCE hInst;                                // current instance
WCHAR szTitle[MAX_LOADSTRING];                  // The title bar text
WCHAR szWindowClass[MAX_LOADSTRING];            // the main window class name

// Forward declarations of functions included in this code module:
ATOM                MyRegisterClass(HINSTANCE hInstance);
BOOL                InitInstance(HINSTANCE, int);
LRESULT CALLBACK    WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK    About(HWND, UINT, WPARAM, LPARAM);
int rowCount = 10, colCount = 10;
int Player1_Column = 0;
int Player1_Row = 0;
std::mt19937 rng;
int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
                     _In_opt_ HINSTANCE hPrevInstance,
                     _In_ LPWSTR    lpCmdLine,
                     _In_ int       nCmdShow)
{
    UNREFERENCED_PARAMETER(hPrevInstance);
    UNREFERENCED_PARAMETER(lpCmdLine);

    // TODO: Place code here.

    // Initialize global strings
    LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
    LoadStringW(hInstance, IDC_FIGHTSEEKER, szWindowClass, MAX_LOADSTRING);
    MyRegisterClass(hInstance);

    // Perform application initialization:
    if (!InitInstance (hInstance, nCmdShow))
    {
        return FALSE;
    }

    HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_FIGHTSEEKER));

    MSG msg;

    // Main message loop:
    while (GetMessage(&msg, nullptr, 0, 0))
    {
        if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }

    return (int) msg.wParam;
}



//
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
    WNDCLASSEXW wcex;

    wcex.cbSize = sizeof(WNDCLASSEX);

    wcex.style          = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc    = WndProc;
    wcex.cbClsExtra     = 0;
    wcex.cbWndExtra     = 0;
    wcex.hInstance      = hInstance;
    wcex.hIcon          = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_FIGHTSEEKER));
    wcex.hCursor        = LoadCursor(nullptr, IDC_ARROW);
    wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);
    wcex.lpszMenuName   = MAKEINTRESOURCEW(IDC_FIGHTSEEKER);
    wcex.lpszClassName  = szWindowClass;
    wcex.hIconSm        = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

    return RegisterClassExW(&wcex);
}
int RandomRow()
{
	std::uniform_int_distribution<std::mt19937::result_type> distrow(1, rowCount);
	return distrow(rng);

}
int RandomCol()
{
	std::uniform_int_distribution<std::mt19937::result_type> distcol(1, colCount);
	return distcol(rng);
}
void InitPositions()
{
	
	
	Player1_Row = RandomRow();
	Player1_Column = RandomCol();


}
HBRUSH Player1SquareBrush=NULL, StandardSquareBrush=NULL;
HPEN Player1Pen = NULL, StandardPen = NULL;
int BoardWidth = 400;
int BoardHeight = 400;
void SetupBrushes()
{
	if(NULL==StandardSquareBrush) StandardSquareBrush = CreateSolidBrush(RGB(255, 0, 255));
	if(NULL==Player1SquareBrush) Player1SquareBrush = CreateSolidBrush(RGB(255, 0, 0));
	if (NULL == Player1Pen) Player1Pen = CreatePen(PS_SOLID, 1, RGB(0, 0, 255));
	if (NULL == StandardPen) StandardPen = CreatePen(PS_SOLID, 1, RGB(0, 0, 0));
}
void PaintBoard(HDC context)
{
	int BoxWidth = BoardWidth / colCount;
	int BoxHeight = BoardHeight / rowCount;
	int CurrCol = 0, CurrRow = 0;
	SetupBrushes();
	
	for (CurrCol=0;CurrCol<colCount;CurrCol++)
	{
		int x = CurrCol*BoxWidth;
		for(CurrRow =0;CurrRow<rowCount;CurrRow++)
		{
			int y = CurrRow*BoxHeight;
			HBRUSH useBrush = StandardSquareBrush;
			HPEN usePen = StandardPen;
			
			

			if (Player1_Column==CurrCol && Player1_Row==CurrRow)
			{
				useBrush = Player1SquareBrush;
				usePen = Player1Pen;
		    }
			else {
				useBrush = StandardSquareBrush;
				usePen = StandardPen;
			}
			RECT useRect;
			useRect.left = x;
			useRect.top = y;
			useRect.right = x + BoxWidth;
			useRect.bottom = y + BoxHeight;
			HBRUSH discardedBrush = (HBRUSH)SelectObject(context, useBrush);
			HPEN discardedPen = (HPEN)SelectObject(context, usePen);
			FillRect(context,&useRect,useBrush);
			Rectangle(context, useRect.left, useRect.top, useRect.right, useRect.bottom);
			SelectObject(context, discardedBrush);
			SelectObject(context, discardedPen);

			
		}
		
	}
}
//
//   FUNCTION: InitInstance(HINSTANCE, int)
//
//   PURPOSE: Saves instance handle and creates main window
//
//   COMMENTS:
//
//        In this function, we save the instance handle in a global variable and
//        create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   hInst = hInstance; // Store instance handle in our global variable

   HWND hWnd = CreateWindowW(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, nullptr, nullptr, hInstance, nullptr);

   if (!hWnd)
   {
      return FALSE;
   }
 
   rng.seed(std::random_device()());
   InitPositions();
   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);

   return TRUE;
}

//
//  FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
//  PURPOSE:  Processes messages for the main window.
//
//  WM_COMMAND  - process the application menu
//  WM_PAINT    - Paint the main window
//  WM_DESTROY  - post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_COMMAND:
        {
            int wmId = LOWORD(wParam);
            // Parse the menu selections:
            switch (wmId)
            {
            case IDM_ABOUT:
                DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
                break;
            case IDM_EXIT:
                DestroyWindow(hWnd);
                break;
            default:
                return DefWindowProc(hWnd, message, wParam, lParam);
            }
        }
        break;
	case WM_KEYDOWN:
	{
		int doPaint = 0;
		if (wParam == VK_DOWN)
		{
			if (Player1_Row >= rowCount - 1) {
				//hit bottom.
			}
			else {
				Player1_Row++;
			}
			doPaint = 1;
		}
		else if (wParam == VK_UP)
		{
			if (Player1_Row <= 0)
			{
				//hit top
			}
			else {
				Player1_Row--;
			}
			doPaint = 1;
		}
		else if (wParam == VK_LEFT)
		{
			if (Player1_Column <= 0)
			{
				//hit left side
			}
			else {
				Player1_Column--;
			}
			doPaint = 1;
		}
		else if (wParam == VK_RIGHT)
		{
			if (Player1_Column >= colCount - 1)
			{
				//hit right side
			}
			else {
				Player1_Column++;
			}
			doPaint = 1;
		}
		if (doPaint == 1)
		{
			InvalidateRect(hWnd, NULL, TRUE);
			UpdateWindow(hWnd);
		}
		
	}
    case WM_PAINT:
        {
            PAINTSTRUCT ps;
			
            HDC hdc = BeginPaint(hWnd, &ps);
			PaintBoard(hdc);
            // TODO: Add any drawing code that uses hdc here...
            EndPaint(hWnd, &ps);
        }
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}

// Message handler for about box.
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
    UNREFERENCED_PARAMETER(lParam);
    switch (message)
    {
    case WM_INITDIALOG:
        return (INT_PTR)TRUE;

    case WM_COMMAND:
        if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
        {
            EndDialog(hDlg, LOWORD(wParam));
            return (INT_PTR)TRUE;
        }
        break;
    }
    return (INT_PTR)FALSE;
}

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#include "stdafx.h"

#include "fightseeker.h"

#include <random>

#include <iostream>

#define MAX_LOADSTRING 100

// Global Variables:

HINSTANCE hInst; // current instance

WCHAR szTitle[MAX_LOADSTRING]; // The title bar text

WCHAR szWindowClass[MAX_LOADSTRING]; // the main window class name

// Forward declarations of functions included in this code module:

ATOM MyRegisterClass(HINSTANCE hInstance);

BOOL InitInstance(HINSTANCE, int);

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);

int rowCount = 10, colCount = 10;

int Player1_Column = 0;

int Player1_Row = 0;

std::mt19937 rng;

int APIENTRY wWinMain(_In_ HINSTANCE hInstance,

_In_opt_ HINSTANCE hPrevInstance,

_In_ LPWSTR lpCmdLine,

_In_ int nCmdShow)

{

UNREFERENCED_PARAMETER(hPrevInstance);

UNREFERENCED_PARAMETER(lpCmdLine);

// TODO: Place code here.

// Initialize global strings

LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);

LoadStringW(hInstance, IDC_FIGHTSEEKER, szWindowClass, MAX_LOADSTRING);

MyRegisterClass(hInstance);

// Perform application initialization:

if (!InitInstance (hInstance, nCmdShow))

{

return FALSE;

}

HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_FIGHTSEEKER));

MSG msg;

// Main message loop:

while (GetMessage(&msg, nullptr, 0, 0))

{

if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))

{

TranslateMessage(&msg);

DispatchMessage(&msg);

}

return (int) msg.wParam;

}

// FUNCTION: MyRegisterClass()

// PURPOSE: Registers the window class.

ATOM MyRegisterClass(HINSTANCE hInstance)

{

WNDCLASSEXW wcex;

wcex.cbSize = sizeof(WNDCLASSEX);

wcex.style = CS_HREDRAW | CS_VREDRAW;

wcex.lpfnWndProc = WndProc;

wcex.cbClsExtra = 0;

wcex.cbWndExtra = 0;

wcex.hInstance = hInstance;

wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_FIGHTSEEKER));

wcex.hCursor = LoadCursor(nullptr, IDC_ARROW);

wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);

wcex.lpszMenuName = MAKEINTRESOURCEW(IDC_FIGHTSEEKER);

wcex.lpszClassName = szWindowClass;

wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

return RegisterClassExW(&wcex);

}

int RandomRow()

{

std::uniform_int_distribution<std::mt19937::result_type> distrow(1, rowCount);

return distrow(rng);

}

int RandomCol()

{

std::uniform_int_distribution<std::mt19937::result_type> distcol(1, colCount);

return distcol(rng);

}

void InitPositions()

{

Player1_Row = RandomRow();

Player1_Column = RandomCol();

}

HBRUSH Player1SquareBrush=NULL, StandardSquareBrush=NULL;

HPEN Player1Pen = NULL, StandardPen = NULL;

int BoardWidth = 400;

int BoardHeight = 400;

void SetupBrushes()

{

if(NULL==StandardSquareBrush) StandardSquareBrush = CreateSolidBrush(RGB(255, 0, 255));

if(NULL==Player1SquareBrush) Player1SquareBrush = CreateSolidBrush(RGB(255, 0, 0));

if (NULL == Player1Pen) Player1Pen = CreatePen(PS_SOLID, 1, RGB(0, 0, 255));

if (NULL == StandardPen) StandardPen = CreatePen(PS_SOLID, 1, RGB(0, 0, 0));

}

void PaintBoard(HDC context)

{

int BoxWidth = BoardWidth / colCount;

int BoxHeight = BoardHeight / rowCount;

int CurrCol = 0, CurrRow = 0;

SetupBrushes();

for (CurrCol=0;CurrCol<colCount;CurrCol++)

{

int x = CurrCol*BoxWidth;

for(CurrRow =0;CurrRow<rowCount;CurrRow++)

{

int y = CurrRow*BoxHeight;

HBRUSH useBrush = StandardSquareBrush;

HPEN usePen = StandardPen;

if (Player1_Column==CurrCol && Player1_Row==CurrRow)

{

useBrush = Player1SquareBrush;

usePen = Player1Pen;

}

else {

useBrush = StandardSquareBrush;

usePen = StandardPen;

}

RECT useRect;

useRect.left = x;

useRect.top = y;

useRect.right = x + BoxWidth;

useRect.bottom = y + BoxHeight;

HBRUSH discardedBrush = (HBRUSH)SelectObject(context, useBrush);

HPEN discardedPen = (HPEN)SelectObject(context, usePen);

FillRect(context,&useRect,useBrush);

Rectangle(context, useRect.left, useRect.top, useRect.right, useRect.bottom);

SelectObject(context, discardedBrush);

SelectObject(context, discardedPen);

}

// FUNCTION: InitInstance(HINSTANCE, int)

// PURPOSE: Saves instance handle and creates main window

// COMMENTS:

// In this function, we save the instance handle in a global variable and

// create and display the main program window.

BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)

{

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

HWND hWnd = CreateWindowW(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,

CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, nullptr, nullptr, hInstance, nullptr);

if (!hWnd)

{

return FALSE;

}

rng.seed(std::random_device()());

InitPositions();

ShowWindow(hWnd, nCmdShow);

UpdateWindow(hWnd);

return TRUE;

}

// FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)

// PURPOSE: Processes messages for the main window.

// WM_COMMAND - process the application menu

// WM_PAINT - Paint the main window

// WM_DESTROY - post a quit message and return

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)

{

switch (message)

{

case WM_COMMAND:

{

int wmId = LOWORD(wParam);

// Parse the menu selections:

switch (wmId)

{

case IDM_ABOUT:

DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);

break;

case IDM_EXIT:

DestroyWindow(hWnd);

break;

default:

return DefWindowProc(hWnd, message, wParam, lParam);

}

break;

case WM_KEYDOWN:

{

int doPaint = 0;

if (wParam == VK_DOWN)

{

if (Player1_Row >= rowCount - 1) {

//hit bottom.

}

else {

Player1_Row++;

}

doPaint = 1;

}

else if (wParam == VK_UP)

{

if (Player1_Row <= 0)

{

//hit top

}

else {

Player1_Row--;

}

doPaint = 1;

}

else if (wParam == VK_LEFT)

{

if (Player1_Column <= 0)

{

//hit left side

}

else {

Player1_Column--;

}

doPaint = 1;

}

else if (wParam == VK_RIGHT)

{

if (Player1_Column >= colCount - 1)

{

//hit right side

}

else {

Player1_Column++;

}

doPaint = 1;

}

if (doPaint == 1)

{

InvalidateRect(hWnd, NULL, TRUE);

UpdateWindow(hWnd);

}

case WM_PAINT:

{

PAINTSTRUCT ps;

HDC hdc = BeginPaint(hWnd, &ps);

PaintBoard(hdc);

// TODO: Add any drawing code that uses hdc here...

EndPaint(hWnd, &ps);

}

break;

case WM_DESTROY:

PostQuitMessage(0);

break;

default:

return DefWindowProc(hWnd, message, wParam, lParam);

}

return 0;

}

// Message handler for about box.

INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)

{

UNREFERENCED_PARAMETER(lParam);

switch (message)

{

case WM_INITDIALOG:

return (INT_PTR)TRUE;

case WM_COMMAND:

if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)

{

EndDialog(hDlg, LOWORD(wParam));

return (INT_PTR)TRUE;

}

break;

}

return (INT_PTR)FALSE;

}