public void Face_Polygon_has_the_same_vertices_as_the_Face([ValueSource("GetFaceOrientationTestCases")] FaceOrientationTestCase testCase)
{
var surface = CreateSurface(isClosedBase: true, isClosedSurface: true, isCounterclockwise: testCase.IsOrientedOutside);
IPolysurfaceFace face;
if (testCase.IsVertical)
{
face = surface.GetVerticalFace(2);
}
else
{
face = surface.GetHorizontalFace(testCase.Side);
}
var actual = new ClosedPolyline3(face.Polygon.Vertices());
var expected = new ClosedPolyline3(face.Vertices().Select(v => v.Point));
GeometryTestUtils.ExpectClosedPolylinesAreEqual(actual, expected, _tolerance);
}
public void Face_Normal_is_consistent_with_edge_order_for_convex_base([ValueSource("GetFaceOrientationTestCases")] FaceOrientationTestCase testCase)
{
var baseVertices = new List <Vector2>
{
new Vector2(-1, +2),
new Vector2(+1, +2),
new Vector2(+2, +1),
new Vector2(+2, -1),
new Vector2(+1, -2),
new Vector2(-1, -2),
new Vector2(-2, -1),
new Vector2(-2, +1)
};
var line = new ClosedPolyline(baseVertices);
var @base = testCase.IsOrientedOutside ? line.AsReverse() : line;
var zRange = new Interval(-3.14, 2.88);
var surface = new VerticalPrismalSurface(@base, zRange, isClosed: true);
IPolysurfaceFace face;
if (testCase.IsVertical)
{
face = surface.GetVerticalFace(2);
}
else
{
face = surface.GetHorizontalFace(testCase.Side);
}
var edge1 = face.Edges.ElementAt(0);
var edge2 = face.Edges.ElementAt(1);
var expected = edge1.Vector().Cross(edge2.Vector());
Expect(face.Normal * expected, Is.Positive);
}
