FromPoint does not intersect it's own IPolyline5

Question

I have a Polyline and a Point FeatureClass. I create a point feature on the Point layer for both the FromPoint and the ToPoint of the IPolyline5 similar to below:

IFeature pointFeature1 = pointFeatureClass.CreateFeature ();
pointFeature1.Shape = polyline.FromPoint;
IFeature pointFeature2 = pointFeatureClass.CreateFeature ();
pointFeature2.Shape = polyline.ToPoint;

Later, I then run both the from point and to point geometries through a method like the below to find all the intersecting polyline features from the polyline feature class.

ISpatialFilter filter = new SpatialFilter ();
filter.Geometry = pointGeometry;
filter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;
IFeatureCursor cursor = lineFeatureClass.FeatureClass.Search (filter, false);

At the very least, the intersect filter should find the polyline off which I got the 2 points. The strange thing is, it works for the FromPoint, but not with the ToPoint.

Both feature classes are using the same Geographic Coordinate System and Projected Coordinate System.

I hope I am doing something stupid, but just can't figure out what.

Answer 1

I got it to work consistently with esriSpatialRelIntersects by just buffering the point by 0.001.

Answer 2

When creating new features from existing features, you should not use the direct reference, but the ShapeCopy. Try to change yout first block to:

pointFeature1.Shape = polyline.FromPoint.ShapeCopy;
pointFeature2.Shape = polyline.ToPoint.ShapeCopy;

Answer 3

instead of

pointFeature1.Shape = polyline.FromPoint;

use

PointFeature1.Shape = ((polyline.FromPoint as IPoint) as IFeature).ShapeCopy;

and for

pointFeature2.Shape = polyline.ToPoint;

use

PointFeature1.Shape = ((polyline.ToPoint as IPoint) as IFeature).ShapeCopy;