void CreateTriangles(MapNode a, MapNode b, MapNode c)
{
_Triangles.Add(a._VertexIndex);
_Triangles.Add(b._VertexIndex);
_Triangles.Add(c._VertexIndex);
MapTriangle triangle = new MapTriangle(a._VertexIndex, b._VertexIndex, c._VertexIndex);
AddTriangleToDictionary(triangle.vertexIndexA, triangle);
AddTriangleToDictionary(triangle.vertexIndexB, triangle);
AddTriangleToDictionary(triangle.vertexIndexC, triangle);
}
void AddTriangleToDictionary(int vertexIndexKey, MapTriangle triangle)
{
if (_TriangleDictionary.ContainsKey(vertexIndexKey))
{
_TriangleDictionary[vertexIndexKey].Add(triangle);
}
else
{
List <MapTriangle> triangleList = new List <MapTriangle>();
triangleList.Add(triangle);
_TriangleDictionary.Add(vertexIndexKey, triangleList);
}
}
private int GetConnectedOutlineVertext(int vertexIndex)
{
List <MapTriangle> triangelsContainingVertex = _TriangleDictionary[vertexIndex];
for (int i = 0; i < triangelsContainingVertex.Count; i++)
{
MapTriangle triangle = triangelsContainingVertex[i];
for (int j = 0; j < 3; j++)
{
int vertexB = triangle[j];
if (vertexB != vertexIndex && !_CheckVertices.Contains(vertexB))
{
if (IsOutlineEdge(vertexIndex, vertexB))
{
return(vertexB);
}
}
}
}
return(-1);
}