【C】Win32 风车实现

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// feicheche.cpp : Defines the entry point for the application.//#include "stdafx.h"#include <math.h>#define PI 3.1415926//定义变量int n = 0,k = 101;int i,num = 0,maxNum = 360;POINT p[201],yp1[201],yp2[201],yp3[201];double f,radious;long WINAPI WndProc(  HWND hWnd,    UINT iMsg,    UINT wParam,  LONG lParam);int APIENTRY WinMain(HINSTANCE hInstance,                     HINSTANCE hPrevInstance,                     LPSTR     lpCmdLine,                     int       nCmdShow){ HWND hWnd;    MSG Msg;WNDCLASS wndclass;    wndclass.cbClsExtra=0;    wndclass.cbWndExtra=0;    wndclass.hbrBackground=(HBRUSH)(GetStockObject(WHITE_BRUSH));    wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);    wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION);    wndclass.hInstance=hInstance;    wndclass.lpfnWndProc=WndProc;    wndclass.lpszClassName="fengche";    wndclass.lpszMenuName=NULL;    wndclass.style=0;if(!RegisterClass(&wndclass)){MessageBeep(0);return FALSE;}hWnd = CreateWindow("fengche",   "风车",   WS_OVERLAPPEDWINDOW,   CW_USEDEFAULT,   0,   CW_USEDEFAULT,   0,   NULL,   NULL,   hInstance,   NULL);    ShowWindow(hWnd,SW_SHOWNORMAL);    UpdateWindow(hWnd);for(n=0;n<=100;n++){p[n].x=(long)(n*PI/100*40);p[n].y=(long)(30*sin(n*PI/100));   }for(n=101;n<=200;n++){p[n].x=(long)(k*PI/101*40);p[n].y=(long)(30*(-sin(k*PI/101)));k--;}while(GetMessage(&Msg,0,0,0))    {        TranslateMessage(&Msg);        DispatchMessage(&Msg);    }return Msg.wParam;}long WINAPI WndProc(  HWND hWnd,        UINT iMsg,       UINT wParam,    LONG lParam   ){HDC hDC;    HBRUSH hBrush;    HPEN hPen;    PAINTSTRUCT PtStr;switch(iMsg){case WM_PAINT:{hDC=BeginPaint(hWnd,&PtStr);SetWindowOrgEx(hDC,-400,-250,NULL);//弧线弧度f = 2*PI*num/maxNum;//绘制叶片1for(i=0;i<=200;i++){yp1[0].x = 0;yp1[0].y = 0;radious = sqrt(p[i].x *p[i].x +p[i].y *p[i].y);double x=(double)p[i].y/(double)p[i].x;yp1[i].x=(long)(radious*cos(f+atan(x)));yp1[i].y=(long)(radious*sin(f+atan(x)));}hBrush = CreateSolidBrush(RGB(255,0,0));SelectObject(hDC,hBrush);hPen = CreatePen(PS_SOLID,2,RGB(0,0,0));SelectObject(hDC,hPen);Polygon(hDC,yp1,201);DeleteObject(hPen);DeleteObject(hBrush);//绘制叶片2for(i=0;i<=200;i++){yp2[0].x = 0;yp2[0].y = 0;radious = sqrt(p[i].x *p[i].x +p[i].y *p[i].y);double x=(double)p[i].y/(double)p[i].x;yp2[i].x=(long)(radious*cos(f+2*PI/3+atan(x)));yp2[i].y=(long)(radious*sin(f+2*PI/3+atan(x)));}hBrush = CreateSolidBrush(RGB(0,255,0));SelectObject(hDC,hBrush);hPen = CreatePen(PS_SOLID,2,RGB(0,0,0));SelectObject(hDC,hPen);Polygon(hDC,yp2,201);DeleteObject(hPen);DeleteObject(hBrush);//绘制叶片3for(i=0;i<=200;i++){yp3[0].x = 0;yp3[0].y = 0;radious = sqrt(p[i].x *p[i].x +p[i].y *p[i].y);double x=(double)p[i].y/(double)p[i].x;yp3[i].x=(long)(radious*cos(f+4*PI/3+atan(x)));yp3[i].y=(long)(radious*sin(f+4*PI/3+atan(x)));}hBrush = CreateSolidBrush(RGB(0,0,255));SelectObject(hDC,hBrush);hPen = CreatePen(PS_SOLID,2,RGB(0,0,0));SelectObject(hDC,hPen);Polygon(hDC,yp3,201);DeleteObject(hPen);DeleteObject(hBrush);num++;Sleep(100);if(num<1000) InvalidateRect(hWnd,NULL,1);EndPaint(hWnd,&PtStr);return 0;}case WM_DESTROY:{PostQuitMessage(0);return 0;}default:return (DefWindowProc(hWnd,iMsg,wParam,lParam));}return FALSE;}
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