function IsPointInsideFourCorners(point, corner)
{
	for(int i = 0; i<4; i++)
	{
		vector dist = corner[(i+1)%4] - corner[i]; // end - begin
		vector point2check = point - corner[i];
		if(dist.x*point2check.y-dist.y*point2check.x<0)
			return false;
	}
	return true;
}