public static MeshEdge FindMeshEdge(Vector3 direction, Bounds tileBounds, Mesh mesh)
{
var vertices = GetBoundryVertices(direction, tileBounds, mesh);
vertices = RemoveDubles(vertices);
MeshEdge edge = FindEdge(vertices, direction);
return(edge);
}
private static MeshEdge FindEdge(List <Vertex> vertices, Vector3 direction)
{
var edgeVertices = new List <Vector3>();
var edges = new List <int>();
for (int i = 0; i < vertices.Count; i++)
{
for (int j = i + 1; j < vertices.Count; j++)
{
HashSet <int> common = new HashSet <int>(vertices[i].triangles);
common.IntersectWith(vertices[j].triangles);
if (common.Count == 1)
{
Vector3 v1 = vertices[i].position;
Vector3 v2 = vertices[j].position;
if (edgeVertices.Contains(v1) == false)
{
edgeVertices.Add(v1);
}
if (edgeVertices.Contains(v2) == false)
{
edgeVertices.Add(v2);
}
int indexV1 = edgeVertices.IndexOf(v1);
int indexV2 = edgeVertices.IndexOf(v2);
edges.Add(indexV1);
edges.Add(indexV2);
}
}
}
var meshEdge = new MeshEdge(edgeVertices.ToArray(), edges.ToArray(), direction);
return(meshEdge);
}