circle cpp Defines the entry point for the application include stdafx

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// circle.cpp : Defines the entry point for the application.
//
#include "stdafx.h"
#include "circle.h"
#include <windows.h>
#include <cmath>
#define PI 3.14159
//структура "шарик"
struct mol{double x,y,vx,vy,m; int r, color;};
//объект структуры "шарик"
struct mol ball={500,200,30,30,2,20,3};
double dt= 0.5; //шаг интегрирования по времени (громко сказано - интегрирование :) )
void StepBack(mol* s) //вернуть шарику координаты предыдущего временного шага
{
//double z,u,w;
//for(z = 0; z<6.28;z=z+0.1){
//u = cos(z);
//w = sin(z);
s->x = s->x - s->vx*dt; s->y = s->y - s->vy*dt;}
//}
#define MAX_LOADSTRING 100
// Global Variables:
HINSTANCE hInst; // current instance
TCHAR szTitle[MAX_LOADSTRING]; // The title bar text
TCHAR 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 APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);
// TODO: Place code here.
MSG msg;
HACCEL hAccelTable;
// Initialize global strings
LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadString(hInstance, IDC_CIRCLE, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance);
// Perform application initialization:
if (!InitInstance (hInstance, nCmdShow))
{
return FALSE;
}
hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_CIRCLE));
// Main message loop:
while (GetMessage(&msg, NULL, 0, 0))
{
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return (int) msg.wParam;
}
//
// FUNCTION: MyRegisterClass()
//
// PURPOSE: Registers the window class.
//
// COMMENTS:
//
// This function and its usage are only necessary if you want this code
// to be compatible with Win32 systems prior to the 'RegisterClassEx'
// function that was added to Windows 95. It is important to call this function
// so that the application will get 'well formed' small icons associated
// with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEX 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_CIRCLE));
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = MAKEINTRESOURCE(IDC_CIRCLE);
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
return RegisterClassEx(&wcex);
}
//
// 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)
{
HWND hWnd;
hInst = hInstance; // Store instance handle in our global variable
hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);
if (!hWnd)
{
return FALSE;
}
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)
{
int wmId, wmEvent;
PAINTSTRUCT ps;
HDC hdc;
HBRUSH brush;
switch (message)
{
case WM_CREATE: //create timer (0.01 sec)
SetTimer(hWnd, 1, 100, NULL);
break;
case WM_TIMER: //when the timer snaps into action
hdc = GetDC(hWnd); //получаем контекст устройств
brush = (HBRUSH)SelectObject(hdc, GetStockObject(WHITE_BRUSH)); //выбираем белую кисть
RECT tempRect; //прямоугольник, который покроет (закрасит, сотрёт) весь шарик
tempRect.left = ball.x - ball.r;
tempRect.top = ball.y - ball.r ;
tempRect.right = ball.x + ball.r;
tempRect.bottom = ball.y + ball.r ;
FillRect(hdc, &tempRect, brush); //стереть шарик
//double z,u,w;
// for(z = 0; z<6.28;z=z+0.1){
//u = cos(z);
//w = sin(z);
ball.x = ball.x + ball.vx*100*cos(phy); //вычислить новое положение шарика
ball.y = ball.y + ball.vy*100*sin(phy);
phy+= PI/18;
RECT rect;
GetClientRect(hWnd, &rect); //получить прямоугольник клиентской области окна
//если произошло отражение от стенки, то обработать это особым образом
if(ball.x - ball.r < 0 || ball.x + ball.r > rect.right)
{StepBack(&ball); ball.vx = -ball.vx;}
if(ball.y - ball.r < 0 || ball.y + ball.r > rect.bottom)
{StepBack(&ball); ball.vy = -ball.vy;}
brush = (HBRUSH) SelectObject(hdc, GetStockObject(ball.color));//выбрать кисть для рисования
Ellipse(hdc, ball.x - ball.r, ball.y - ball.r, ball.x + ball.r, ball.y + ball.r); //нарисовать шарик
SelectObject(hdc, brush); //выбрать старую кисть
ReleaseDC(hWnd, hdc); //освободить контекст устройства
break;
case WM_DESTROY:
KillTimer(hWnd, 1);
PostQuitMessage(0);
break;
case WM_COMMAND:
wmId = LOWORD(wParam);
wmEvent = HIWORD(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_PAINT:
hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code here...
EndPaint(hWnd, &ps);
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;
}