void
motion ( int x, int y )
{
trackball.dragMouse(x,y);
}
void
motion ( int x, int y )
{
trackball.dragMouse(x,height-y);
}
void
motion ( int x, int y )
{
trackball.dragMouse(x,y);
}
void
motion ( int x, int y )
{
trackball.dragMouse(x,height-y);
}