对多个显示器有意义,决定窗口在哪个显示器上显示,默认为0,即当前主显示器。
osgViewer/GraphicsWindowWin32.cpp
bool GraphicsWindowWin32::determineWindowPositionAndStyle( unsigned int screenNum,
int clientAreaX,
int clientAreaY,
unsigned int clientAreaWidth,
unsigned int clientAreaHeight,
bool decorated,
int& x,
int& y,
unsigned int& w,
unsigned int& h,