public void WindingOrderClockwiseTriangle()
{
IList <Vector2D> positions = new List <Vector2D>();
positions.Add(new Vector2D(0, 0));
positions.Add(new Vector2D(1, 1));
positions.Add(new Vector2D(1, 0));
Assert.AreEqual(PolygonWindingOrder.Clockwise, SimplePolygonAlgorithms.ComputeWindingOrder(positions));
Assert.AreEqual(-0.5, SimplePolygonAlgorithms.ComputeArea(positions));
}
public void WindingOrderCounterclockwiseDiamond()
{
IList <Vector2D> positions = new List <Vector2D>();
positions.Add(new Vector2D(0, -0.5));
positions.Add(new Vector2D(0.5, 0));
positions.Add(new Vector2D(0, 0.5));
positions.Add(new Vector2D(-0.5, 0));
Assert.AreEqual(PolygonWindingOrder.Counterclockwise, SimplePolygonAlgorithms.ComputeWindingOrder(positions));
Assert.AreEqual(0.5, SimplePolygonAlgorithms.ComputeArea(positions));
}
public void WindingOrderOnEllipsoid()
{
IList <Vector3D> positions = new List <Vector3D>();
positions.Add(Ellipsoid.UnitSphere.ToVector3D(Trig.ToRadians(new Geodetic3D(0, 0))));
positions.Add(Ellipsoid.UnitSphere.ToVector3D(Trig.ToRadians(new Geodetic3D(1, 0))));
positions.Add(Ellipsoid.UnitSphere.ToVector3D(Trig.ToRadians(new Geodetic3D(1, 1))));
EllipsoidTangentPlane plane = new EllipsoidTangentPlane(Ellipsoid.UnitSphere, positions);
ICollection <Vector2D> positionsOnPlane = plane.ComputePositionsOnPlane(positions);
Assert.AreEqual(PolygonWindingOrder.Counterclockwise, SimplePolygonAlgorithms.ComputeWindingOrder(positionsOnPlane));
}
public void WindingOrderEmpty()
{
SimplePolygonAlgorithms.ComputeWindingOrder(new List <Vector2D>());
}
public void WindingOrderNull()
{
SimplePolygonAlgorithms.ComputeWindingOrder(null);
}
