/// <summary>
/// transition from one edge to the next
/// </summary>
/// <param name="edge">the previous edge</param>
/// <param name="newTarget">the new target vertex id</param>
/// <returns>the new edge</returns>
internal ITestingTrapezoidEdge TestTransition(ITestingTrapezoidEdge edge, int newTarget)
{
if (edge is TrapezoidEdge trapezoidEdge)
{
return(this.Transition(trapezoidEdge, newTarget, newTarget));
}
throw new InvalidOperationException("Invalid use of internal test function");
}
/// <summary>
/// Two edges join in a final vertex
/// </summary>
/// <param name="lower">the lower edge</param>
internal void TestJoin(ITestingTrapezoidEdge lower)
{
if (lower is TrapezoidEdge trapezoidEdge)
{
this.JoinTrapezoidEdges(trapezoidEdge);
return;
}
throw new InvalidOperationException("Invalid use of internal test function");
}
