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#include <Windows.h>
#include <math.h>
#include <string>
#include <sstream>
#define screen_width 800
#define screen_height 600
#define pi 3.14159
struct _points
{
int _x;
int _y;
};
struct _ycoords
{
_points _one;
_points _two;
} _yc;
COLORREF blue = RGB(0, 0, 255);
HDC hDC;
HWND hWnd;
std::string _amplitude, _frequency, _speed;
double _freq = 50;
int _sTime = 10, _amp = 100;
LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
void calcwave();
void drawwave();
std::string convstr(const int& t);
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
WNDCLASSEX wc;
ZeroMemory(&wc, sizeof(WNDCLASSEX));
ZeroMemory(&_yc, sizeof(_yc));
_yc._one._x = 600;
_yc._two._x = 599;
_yc._two._y = 300;
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = WindowProc;
wc.hInstance = hInstance;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hIcon = (HICON)LoadImage(NULL, "C:\\Visual Studio 2010\\Icons\\Smiley.ico", IMAGE_ICON, 0, 0, LR_LOADFROMFILE);
wc.lpszClassName = "SineWave";
RegisterClassEx(&wc);
hWnd = CreateWindowEx(NULL,
"SineWave", "SineWave",
WS_SYSMENU,
0, 45,
screen_width, screen_height,
NULL, NULL,
hInstance,
NULL);
ShowWindow(hWnd, nCmdShow);
hDC = GetDC(hWnd);
HPEN _Pen = CreatePen(PS_SOLID, 1, blue);
SelectObject(hDC, _Pen);
MSG msg;
while(TRUE)
{
while(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{DispatchMessage(&msg);}
if(msg.message == WM_QUIT)
break;
calcwave();
}
return msg.wParam;
}
LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch(message)
{
case WM_DESTROY:
{
PostQuitMessage(0);
return 0;
} break;
case WM_KEYDOWN:
{
switch (wParam)
{
case VK_NUMPAD4:
_freq--;
if(_freq < 1.0)
_freq = 1.0;
break;
case VK_NUMPAD6:
_freq++;
break;
case VK_NUMPAD8:
_amp++;
if(_amp > 200)
_amp = 200;
break;
case VK_NUMPAD2:
_amp--;
if(_amp < 0)
_amp = 0;
break;
case VK_SUBTRACT:
_sTime++;
if(_sTime > 50)
_sTime = 50;
break;
case VK_ADD:
_sTime--;
if(_sTime < 10)
_sTime = 10;
break;
case 0x48:
MessageBox(NULL, "NUMPAD + : Increase speed\n"
"NUMPAD - : Decrease speed\n"
"NUMPAD 8 : Increase amplitude\n"
"NUMPAD 2 : Decrease amplitude\n"
"NUMPAD 4 : Increase frequency\n"
"NUMPAD 6 : Decrease frequency\n"
"\nChanges are small, hold the button",
"Help", MB_OK);
break;
}
return 0;
} break;
}
return DefWindowProc(hWnd, message, wParam, lParam);
}
void calcwave()
{
double _full = 2 * pi * _freq;
static double _x = 0;
_yc._one._y = (sin(_x/_freq)*_amp) + 300;
_x++;
if (_x >= _full)
_x -= _full;
_amplitude = "Amplitude : " + convstr(_amp * 2) + " pixels";
_frequency = "Frequency : " + convstr(_full) + " pixels";
_speed = "Speed : " + convstr(_sTime);
drawwave();
TextOut(hDC, 0, 0, _amplitude.c_str(), _amplitude.size());
TextOut(hDC, 0, 17, _frequency.c_str(), _frequency.size());
TextOut(hDC, 0, 34, _speed.c_str(), _speed.size());
_yc._two._y = _yc._one._y;
}
void drawwave()
{
MoveToEx(hDC, _yc._two._x, _yc._two._y, NULL);
LineTo(hDC, _yc._one._x, _yc._one._y);
ScrollWindow(hWnd, -1, 0, NULL, NULL);
Sleep(_sTime);
}
std::string convstr(const int& t)
{
std::stringstream itoa;
itoa << t;
return itoa.str();
}
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