int Game(void)
{
DWORD passedTime = 0;
FsPassedTime(true);
//////////// initial setting up the scene ////////////////////////////////////////
int timeSpan = 33; // milliseconds
double timeInc = (double)timeSpan * 0.001; // time increment in seconds
FsGetWindowSize(width, height);
int lb,mb,rb,mx,my;
glViewport(0, 0, width, height);
////////////////////// main simulation loop //////////////////////////
while (1)
{
FsPollDevice();
FsGetMouseState(lb,mb,rb,mx,my);
int key=FsInkey();
if(key == FSKEY_ESC)
break;
timeInc = (double)(passedTime) * 0.001;
clocktime += timeInc;
/////////// update physics /////////////////
updateNumPhysics(simBall1, timeInc);
updatePrecisePhysics(realBall, timeInc);
/////////////////////////////////////////
renderScene();
////// update time lapse /////////////////
passedTime = FsPassedTime(); // Making it up to 50fps
int timediff = timeSpan-passedTime;
// printf("\ntimeInc=%f, passedTime=%d, timediff=%d", timeInc, passedTime, timediff);
while(timediff >= timeSpan/3)
{
FsSleep(5);
passedTime=FsPassedTime(); // Making it up to 50fps
timediff = timeSpan-passedTime;
// printf("--passedTime=%d, timediff=%d", passedTime, timediff);
}
passedTime=FsPassedTime(true); // Making it up to 50fps
}
return 0;
}
void FsOpenWindow(int x0,int y0,int wid,int hei,int useDoubleBuffer)
{
if(NULL!=fsWin32Internal.hWnd)
{
MessageBoxA(fsWin32Internal.hWnd,"Error! Window already exists.","Error!",MB_OK);
exit(1);
}
// Note 2012/03/08 RegisterClassW and CreateWindowW doesn't seem to work.
WNDCLASSA wc;
HINSTANCE inst=GetModuleHandleA(NULL);
wc.style=CS_OWNDC|CS_BYTEALIGNWINDOW;
wc.lpfnWndProc=(WNDPROC)WindowFunc;
wc.cbClsExtra=0;
wc.cbWndExtra=0;
wc.hInstance=(HINSTANCE)inst;
wc.hIcon=LoadIconA(inst,"MAINICON");
wc.hCursor=LoadCursor(NULL,IDC_ARROW);
wc.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
wc.lpszMenuName=NULL;
wc.lpszClassName=WINCLASS;
if(0!=RegisterClassA(&wc))
{
doubleBuffer=useDoubleBuffer;
RECT rc;
rc.left =x0;
rc.top =y0;
rc.right =(unsigned long)(x0+wid-1);
rc.bottom=(unsigned long)(y0+hei-1);
AdjustWindowRect(&rc,WINSTYLE,FALSE);
wid =rc.right-rc.left+1;
hei =rc.bottom-rc.top+1;
#ifdef _UNICODE
// What's the point of using CreateWindowA? Another weird Microsoft logic here.
static wchar_t buf[256];
const char *windowNameA=(const char *)WINNAME;
for(int i=0; i<255 && 0!=windowNameA[i]; ++i)
{
buf[i]=windowNameA[i];
buf[i+1]=0;
}
const char *windowNameUsed=(const char *)buf;
#else
const char *windowNameUsed=(const char *)WINNAME;
#endif
fsWin32Internal.hWnd=CreateWindowA(WINCLASS,windowNameUsed,WINSTYLE,x0,y0,wid,hei,NULL,NULL,inst,NULL);
if(NULL!=fsWin32Internal.hWnd)
{
InitializeOpenGL(fsWin32Internal.hWnd);
ShowWindow(fsWin32Internal.hWnd,SW_SHOWNORMAL);
UpdateWindow(fsWin32Internal.hWnd);
FsPassedTime(); // Reset Timer
}
else
{
printf("Could not open window.\n");
exit(1);
}
}
}
int main(void)
{
double cubeMatrix[16]=
{
1.0,0.0,0.0,0.0,
0.0,1.0,0.0,0.0,
0.0,0.0,1.0,0.0,
0.0,0.0,0.0,1.0
};
FsOpenWindow(32,32,800,600,1); // 800x600 pixels, useDoubleBuffer=1
glEnable(GL_DEPTH_TEST);
glDisable(GL_LIGHTING);
glDepthFunc(GL_LESS);
FsPassedTime(); // Reset the timer
while(FsInkey()==0)
{
int mx,my,lb,mb,rb,passed;
double spinX,spinY;
passed=FsPassedTime();
FsPollDevice();
FsGetMouseState(lb,mb,rb,mx,my);
int wid,hei,cx,cy;
FsGetWindowSize(wid,hei);
cx=wid/2;
cy=hei/2;
spinX=(double)((mx-cx)/10)*(double)passed/1000.0; // 1 pixel = degrees/sec
spinY=(double)((my-cy)/10)*(double)passed/1000.0; // 1 pixel = degrees/sec
glClearColor(0.0,0.0,0.0,0.0);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glViewport(0,0,wid,hei);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0,(double)wid/(double)hei,1.0,20.0);
glTranslated(0.0,0.0,-10.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glRotated(spinX,0.0,1.0,0.0);
glRotated(spinY,1.0,0.0,0.0);
glMultMatrixd(cubeMatrix);
glGetDoublev(GL_MODELVIEW_MATRIX,cubeMatrix);
glBegin(GL_QUADS);
glColor3ub(0,0,255);
glVertex3d(-2.5,-2.5,-2.5);
glVertex3d(-2.5, 2.5,-2.5);
glVertex3d( 2.5, 2.5,-2.5);
glVertex3d( 2.5,-2.5,-2.5);
glColor3ub(255,0,0);
glVertex3d(-2.5,-2.5, 2.5);
glVertex3d(-2.5, 2.5, 2.5);
glVertex3d( 2.5, 2.5, 2.5);
glVertex3d( 2.5,-2.5, 2.5);
glColor3ub(255,0,255);
glVertex3d(-2.5,-2.5,-2.5);
glVertex3d(-2.5,-2.5, 2.5);
glVertex3d(-2.5, 2.5, 2.5);
glVertex3d(-2.5, 2.5,-2.5);
glColor3ub(0,255,0);
glVertex3d( 2.5,-2.5,-2.5);
glVertex3d( 2.5,-2.5, 2.5);
glVertex3d( 2.5, 2.5, 2.5);
glVertex3d( 2.5, 2.5,-2.5);
glColor3ub(0,255,255);
glVertex3d(-2.5,-2.5,-2.5);
glVertex3d(-2.5,-2.5, 2.5);
glVertex3d( 2.5,-2.5, 2.5);
glVertex3d( 2.5,-2.5,-2.5);
glColor3ub(255,255,0);
glVertex3d(-2.5, 2.5,-2.5);
glVertex3d(-2.5, 2.5, 2.5);
glVertex3d( 2.5, 2.5, 2.5);
glVertex3d( 2.5, 2.5,-2.5);
glEnd();
FsSwapBuffers();
FsSleep(20-passed);
}
return 0;
}
