/// <summary>
/// Remove a span of edges that are within a distance threshold from rest of graph.
/// Walk forward from start_vid along edge first_eid, and keep walking & discarding
/// until we find a point we want to keep
/// </summary>
private void decimate_forward(int start_vid, int first_eid, double dist_thresh)
{
int cur_eid = first_eid;
int cur_vid = start_vid;
System.Diagnostics.Debug.Assert(Graph.IsEdge(cur_eid));
bool stop = false;
while (!stop)
{
Index2i nextinfo = DGraph2Util.NextEdgeAndVtx(cur_eid, cur_vid, Graph);
if (PreserveEdgeFilterF(cur_eid))
{
break;
}
edge_hash.RemoveSegmentUnsafe(cur_eid, Graph.GetEdgeCenter(cur_eid));
Graph.RemoveEdge(cur_eid, true);
if (nextinfo.a == int.MaxValue)
{
break;
}
cur_eid = nextinfo.a;
cur_vid = nextinfo.b;
double dist = MinSelfSegDistance(cur_vid, 2 * dist_thresh);
double collision_dist = MinCollisionConstraintDistance(cur_vid, dist_thresh);
if (dist > dist_thresh && collision_dist > CollisionRadius)
{
stop = true;
}
}
}