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sin




1000 POINT. 0 999 x 0 cxClient. . Polyline (. 6.3).

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#include <windows.h>

#include <math.h>

#define NUM 1000

#define TWOPI (2 * 3.14159)

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

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,

PSTR szCmdLine, int iCmdShow)

 

{

static char szAppName[] = "Sin";

HWND hwnd;

MSG msg;

WNDCLASSEX wndclass;

wndclass.cbSize = sizeof (wndclass);

wndclass.style = CS_HREDRAW | CS_VREDRAW;

wndclass.lpfnWndProc = WndProc;

wndclass.cbClsExtra = 0;

wndclass.cbWndExtra = 0;

wndclass.hInstance = hInstance;

wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION);

wndclass.hCursor = LoadCursor (NULL, IDC_ARROW);

wndclass.hbrBackground=(HBRUSH) GetStockObject(WHITE_BRUSH);

wndclass.lpszMenuName = NULL;

wndclass.lpszClassName = szAppName;

wndclass.hIconSm = LoadIcon (NULL, IDI_APPLICATION);

RegisterClassEx (&wndclass);

hwnd = CreateWindow (szAppName, "Second Example",

WS_OVERLAPPEDWINDOW,

CW_USEDEFAULT, CW_USEDEFAULT,

CW_USEDEFAULT, CW_USEDEFAULT,

NULL, NULL, hInstance, NULL);

ShowWindow (hwnd, iCmdShow);

UpdateWindow (hwnd);

while (GetMessage (&msg, NULL, 0, 0)) {

TranslateMessage (&msg);

DispatchMessage (&msg);

}

return msg.wParam;

}

LRESULT CALLBACK WndProc (HWND hwnd, UINT iMsg,

WPARAM wParam, LPARAM lParam)

{

static int cxClient, cyClient;

HDC hdc;

int i;

PAINTSTRUCT ps;

POINT pt [NUM];

switch (iMsg) {

case WM_SIZE:

cxClient = LOWORD (lParam);

cyClient = HIWORD (lParam);

 

return 0;

case WM_PAINT:

hdc = BeginPaint (hwnd, &ps);

MoveToEx (hdc, 0, cyClient / 2, NULL);

LineTo (hdc, cxClient, cyClient / 2);

for (i = 0; i < NUM; i++) {

pt[i].x = i * cxClient / NUM;

pt[i].y = (int) (cyClient / 2 * (1 - sin (TWOPI * i / NUM)));

}

Polyline (hdc, pt, NUM);

return 0;

case WM_DESTROY:

PostQuitMessage (0);

return 0;

}

return DefWindowProc (hwnd, iMsg, wParam, lParam);

}

 

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. 6.3

 

:

Rectangle ; Ellipse ; RoundRect ; Chord , ; Pie , ; Polygon ; PolyPolygon .

, . WHITE _ BRUSH.

:

Rectangle (hdc, x1, y1, x2, y2);

(x 1, y 1) , (x 2, y 2) .

, :

Ellipse (hdc, x1, y1, x2, y2);

, Ellipse ( ).

:

RoundRect (hdc, x1, y1, x2, y2, xEllipse, yEllipse);

: , xEllipse, yEllipse. , , . ,

xEllipse = (x2x1)/4; yEllipse = (y2y1)/4;

, , .

Chord ( ) Pie ( ) :

Chord (hdc, x1, y1, x2, y2, xStart, yStart, xEnd, yEnd);

Pie (hdc, x1, y1, x2, y2, xStart, yStart, xEnd, yEnd);

(xStart, yStart ) . , , ; (xEnd, yEnd ) . , , .

Chord , Pie .

, Chord Pie, . 6.3.

. 6.3. , :

Chord; Pie





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