平面坐标系之间点坐标的换算

POINTF xxx::PointTransform(POINTF point, DOUBLE angle)
{
	if(angle == 0)
	{
		return point;
	}

	POINTF revl_Point;
	angle = angle * PI / 180;
	revl_Point.x = point.x * cos(angle) + point.y * sin(angle);
	revl_Point.y = point.y * cos(angle) - point.x * sin(angle);

	return revl_Point;
}