public void SpinEdgeBetweenSquaresBackward()
{
// 0---1 0---1
// | P | |P ^|
// 3-->2 --> 3 / 2
// | N | |/ N|
// 4---5 4---5
var indexer = new ManualFaceNeighborIndexer(6, 14, 2, 1);
indexer.AddFace(0, 1, 2, 3);
indexer.AddFace(5, 4, 3, 2);
var topology = TopologyUtility.BuildTopology(indexer);
Topology.VertexEdge edgeToSpin;
Assert.IsTrue(topology.vertices[3].TryFindEdge(topology.vertices[2], out edgeToSpin));
topology.SpinEdgeBackward(edgeToSpin);
TopologyUtility.CheckVerticesForInvalidEdgeCycles(topology);
TopologyUtility.CheckFacesForInvalidEdgeCycles(topology);
Assert.AreEqual(2, topology.vertices[0].neighborCount);
Assert.AreEqual(3, topology.vertices[1].neighborCount);
Assert.AreEqual(2, topology.vertices[2].neighborCount);
Assert.AreEqual(2, topology.vertices[3].neighborCount);
Assert.AreEqual(3, topology.vertices[4].neighborCount);
Assert.AreEqual(2, topology.vertices[5].neighborCount);
Assert.AreEqual(4, topology.internalFaces[0].neighborCount);
Assert.AreEqual(4, topology.internalFaces[1].neighborCount);
Assert.AreEqual(topology.vertices[4], edgeToSpin.nearVertex);
Assert.AreEqual(topology.vertices[1], edgeToSpin.farVertex);
Assert.AreEqual(topology.internalFaces[0], edgeToSpin.prevFace);
Assert.AreEqual(topology.internalFaces[1], edgeToSpin.nextFace);
Assert.AreEqual(topology.vertices[3], edgeToSpin.prev.farVertex);
Assert.AreEqual(topology.vertices[5], edgeToSpin.next.farVertex);
Assert.AreEqual(topology.vertices[2], edgeToSpin.twin.prev.farVertex);
Assert.AreEqual(topology.vertices[0], edgeToSpin.twin.next.farVertex);
Assert.AreEqual(topology.vertices[1], edgeToSpin.faceEdge.nextVertex);
Assert.AreEqual(topology.vertices[2], edgeToSpin.faceEdge.next.nextVertex);
Assert.AreEqual(topology.vertices[5], edgeToSpin.faceEdge.next.next.nextVertex);
Assert.AreEqual(topology.vertices[4], edgeToSpin.faceEdge.next.next.next.nextVertex);
Assert.AreEqual(topology.vertices[1], edgeToSpin.faceEdge.next.next.next.next.nextVertex);
Assert.AreEqual(topology.vertices[4], edgeToSpin.twin.faceEdge.nextVertex);
Assert.AreEqual(topology.vertices[3], edgeToSpin.twin.faceEdge.next.nextVertex);
Assert.AreEqual(topology.vertices[0], edgeToSpin.twin.faceEdge.next.next.nextVertex);
Assert.AreEqual(topology.vertices[1], edgeToSpin.twin.faceEdge.next.next.next.nextVertex);
Assert.AreEqual(topology.vertices[4], edgeToSpin.twin.faceEdge.next.next.next.next.nextVertex);
}
public void SpinEdgeBetweenTrianglesForward()
{
// 1 1
// /^\ /P\
// 0P|N3 --> 0-->3
// \|/ \N/
// 2 2
var indexer = new ManualFaceNeighborIndexer(4, 10, 2, 1);
indexer.AddFace(0, 1, 2);
indexer.AddFace(3, 2, 1);
var topology = TopologyUtility.BuildTopology(indexer);
Topology.VertexEdge edgeToSpin;
Assert.IsTrue(topology.vertices[2].TryFindEdge(topology.vertices[1], out edgeToSpin));
topology.SpinEdgeForward(edgeToSpin);
TopologyUtility.CheckVerticesForInvalidEdgeCycles(topology);
TopologyUtility.CheckFacesForInvalidEdgeCycles(topology);
Assert.AreEqual(3, topology.vertices[0].neighborCount);
Assert.AreEqual(2, topology.vertices[1].neighborCount);
Assert.AreEqual(2, topology.vertices[2].neighborCount);
Assert.AreEqual(3, topology.vertices[3].neighborCount);
Assert.AreEqual(3, topology.internalFaces[0].neighborCount);
Assert.AreEqual(3, topology.internalFaces[1].neighborCount);
Assert.AreEqual(topology.vertices[0], edgeToSpin.nearVertex);
Assert.AreEqual(topology.vertices[3], edgeToSpin.farVertex);
Assert.AreEqual(topology.internalFaces[0], edgeToSpin.prevFace);
Assert.AreEqual(topology.internalFaces[1], edgeToSpin.nextFace);
Assert.AreEqual(topology.vertices[1], edgeToSpin.prev.farVertex);
Assert.AreEqual(topology.vertices[2], edgeToSpin.next.farVertex);
Assert.AreEqual(topology.vertices[2], edgeToSpin.twin.prev.farVertex);
Assert.AreEqual(topology.vertices[1], edgeToSpin.twin.next.farVertex);
Assert.AreEqual(topology.vertices[3], edgeToSpin.faceEdge.nextVertex);
Assert.AreEqual(topology.vertices[2], edgeToSpin.faceEdge.next.nextVertex);
Assert.AreEqual(topology.vertices[0], edgeToSpin.faceEdge.next.next.nextVertex);
Assert.AreEqual(topology.vertices[3], edgeToSpin.faceEdge.next.next.next.nextVertex);
Assert.AreEqual(topology.vertices[0], edgeToSpin.twin.faceEdge.nextVertex);
Assert.AreEqual(topology.vertices[1], edgeToSpin.twin.faceEdge.next.nextVertex);
Assert.AreEqual(topology.vertices[3], edgeToSpin.twin.faceEdge.next.next.nextVertex);
Assert.AreEqual(topology.vertices[0], edgeToSpin.twin.faceEdge.next.next.next.nextVertex);
}