/// <summary>
/// Finds a set of predefined points on an edge. Normally it's only
/// three - start, middle and end. If the edge type is "principal"
/// and the target has a Collide.Shape, additional points at the surface
/// of the shape may appear.
/// </summary>
/// <param name="edge">Edge to find predefined points on.</param>
/// <returns>Iterator to point on the edge.</returns>
private IEnumerable <Vector3> FindPredefinedEdgePoints(MeshUtils.Edge edge)
{
yield return(edge.Start);
yield return(edge.Center);
yield return(edge.End);
if (edge.Type == MeshUtils.Edge.EdgeType.Triangle || m_collectedData == null || m_collectedData.Target == null || m_collectedData.Target.GetComponent <Shape>() == null)
{
yield break;
}
ShapeUtils utils = m_collectedData.Target.GetComponent <Shape>().GetUtils();
if (utils == null)
{
yield break;
}
ShapeUtils.Direction[] edgeDirections = ShapeUtils.ToDirection(ShapeUtils.ToPrincipal(utils.FindDirectionGivenWorldEdge(edge)));
yield return(utils.GetWorldFace(edgeDirections[0]));
yield return(utils.GetWorldFace(edgeDirections[1]));
}