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#pragma comment(lib, "opengl32.lib")
#pragma comment(lib, "glu32.lib")
#include "stdafx.h"
#include "Particle.h"
LRESULT CALLBACK WndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
void EnableOpenGL (HWND hWnd, HDC *hDC, HGLRC *hRC);
void DisableOpenGL (HWND hWnd, HDC hDC, HGLRC hRC);
void paint( HDC );
void init();
void update();
bool createdDialog = false, canDraw = false;
float A, B, m, n, U, d;
float g_rotation;
int mouseXPos = 0, mouseYPos = 0, centerX = 0, centerY = 0, wheelDelta = 0;
HWND g_hDialog = NULL, sr_hDialog = NULL;
RECT rcClient;
ofstream debug( "debug.txt" );
Particle *particles[50];
Vector2 dist, u;
void init()
{
glMatrixMode( GL_PROJECTION );
glViewport( 100, 100, 500, 500 );
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
glOrtho( -250, 250, 250, -250, 0.01, 3 );
glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
glPointSize( 5.0f );
srand( time(NULL) );
for( int i = 0; i < 50; i++ )
particles[i] = new Particle( (rand()%500)-250, (rand()%500)-250, 5 );
}
void update()
{
for( int i = 0; i < 50; i++ )
{
particles[i]->setVel( Vector2( 0, 0 ) );
for( int j = 0; j < 50; j++ )
if( i != j )
{
dist = particles[j]->getPos()-particles[i]->getPos(); //find displacement from particle i to j
if( dist.magnitude() < 50 )
{
u = dist;
u.normalize(); //normalize the distance, for later use
n = 2.25;
m = 3;
d = dist.magnitude()/10; //distance in terms of the diameter of a particle
U = -4000/pow( d, n ) + 2000/pow( d, m );
U /= 1000;
u = u * U;
particles[i]->setVel( particles[i]->getVel()+u );
}
}
dist = Vector2( mouseXPos, mouseYPos ) - particles[i]->getPos();
dist.normalize();
dist = dist * 2;
particles[i]->setVel( particles[i]->getVel()+dist );
particles[i]->update();
}
}
void paint( HDC hDC )
{
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glMatrixMode( GL_PROJECTION );
glPushMatrix();
glLoadIdentity();
glOrtho( -250, 250, 250, -250, -0.01, -3 );
glMatrixMode( GL_MODELVIEW );
glPushMatrix();
glLoadIdentity();
glColor3f( 1.0f, 1.0f, 1.0f );
glBegin( GL_LINES );
for( int i = -250; i < 250; i += 10 )
{
glVertex3i( i, 250, 1 );
glVertex3i( 1, -250, 1 );
}
glEnd();
glBegin( GL_POINTS );
for( int i = 0; i < 50; i++ )
particles[i]->draw();
glEnd();
glPopMatrix();
glPopMatrix();
glFinish();
SwapBuffers (hDC);
}
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int iCmdShow)
{
WNDCLASS wc;
HWND hWnd;
HDC hDC;
HGLRC hRC;
MSG msg;
BOOL bQuit = FALSE;
wc.style = CS_OWNDC;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon (NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor (NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH) GetStockObject (BLACK_BRUSH);
wc.lpszMenuName = NULL;
wc.lpszClassName = "FBX Renderer";
RegisterClass (&wc);
hWnd = CreateWindow ( "FBX Renderer", "FBX Renderer",
WS_CAPTION | WS_POPUPWINDOW | WS_VISIBLE,
100, 100, 500, 500,
NULL, NULL, hInstance, NULL);
EnableOpenGL (hWnd, &hDC, &hRC);
init();
while (!bQuit)
{
if (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE))
{
if (msg.message == WM_QUIT)
bQuit = TRUE;
else
if(!IsDialogMessage(g_hDialog, &msg))
{
TranslateMessage (&msg);
DispatchMessage (&msg);
}
}
else
{
update();
paint( hDC );
Sleep( 1 );
}
}
DisableOpenGL (hWnd, hDC, hRC);
DestroyWindow (hWnd);
return msg.wParam;
}
LRESULT CALLBACK WndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_CREATE:
return 0;
case WM_MOUSEMOVE:
{
GetClientRect(hWnd, &rcClient);
centerX = rcClient.left + (rcClient.right-rcClient.left)/2;
centerY = rcClient.top + (rcClient.bottom-rcClient.top)/2;
mouseXPos = GET_X_LPARAM( lParam )+rcClient.left;
mouseYPos = GET_Y_LPARAM( lParam )+rcClient.top;
}
return 0;
case WM_MOUSEWHEEL:
wheelDelta += GET_WHEEL_DELTA_WPARAM(wParam)/120;
return 0;
case WM_CLOSE:
PostQuitMessage (0);
return 0;
case WM_DESTROY:
return 0;
case WM_KEYDOWN:
switch (wParam)
{
case VK_ESCAPE:
PostQuitMessage(0);
return 0;
}
return 0;
default:
return DefWindowProc (hWnd, message, wParam, lParam);
}
}
void EnableOpenGL (HWND hWnd, HDC *hDC, HGLRC *hRC)
{
PIXELFORMATDESCRIPTOR pfd;
int iFormat;
*hDC = GetDC (hWnd);
ZeroMemory (&pfd, sizeof (pfd));
pfd.nSize = sizeof (pfd);
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW |
PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.cColorBits = 24;
pfd.cDepthBits = 16;
pfd.iLayerType = PFD_MAIN_PLANE;
iFormat = ChoosePixelFormat (*hDC, &pfd);
SetPixelFormat (*hDC, iFormat, &pfd);
*hRC = wglCreateContext( *hDC );
wglMakeCurrent( *hDC, *hRC );
}
void DisableOpenGL (HWND hWnd, HDC hDC, HGLRC hRC)
{
wglMakeCurrent (NULL, NULL);
wglDeleteContext (hRC);
ReleaseDC (hWnd, hDC);
}
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