1000 POINT. 0 999 x 0 cxClient. . Polyline (. 6.3).
:
#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);
}
:
. 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