public void Center_OfASquareFace_ShouldBeCorrect()
{
// Fixture setup
var fakeFace = new Face(new[]
{
VertexUtilities.NewVertex(1, 1, 1),
VertexUtilities.NewVertex(1, -1, 1),
VertexUtilities.NewVertex(-1, -1, 1),
VertexUtilities.NewVertex(-1, 1, 1)
});
var expected = new Vector(new[] { 0, 0, Math.Sqrt(3) });
// Exercise system
var actual = fakeFace.SphericalCenter();
// Verify outcome
TestUtilities.WriteExpectedAndActual(expected, actual);
Assert.Equal(expected, actual);
// Teardown
}
public void Faces_GivenAClockwiseSetOfVertices_SortsVerticesInEachFaceInAnticlockwiseOrder()
{
// Fixture setup
var clockwiseVertices = new List <Vertex>
{
VertexUtilities.NewVertex(0, 0),
VertexUtilities.NewVertex(Math.PI / 2, Math.PI / 2),
VertexUtilities.NewVertex(Math.PI / 2, 0)
};
// Exercise system
var face = new Face(clockwiseVertices);
var vertices = face.Vertices;
var center = face.SphericalCenter();
// Verify outcome
var vectors = vertices.Select(vertex => vertex.Position).ToList();
var viewDirection = -center;
Assert.True(TestUtilities.AreInAntiClockwiseOrder(vectors, center, viewDirection));
// Teardown
}
