topic Offset Polyline(original as drawn) problem in Arcgis pro sdk in ArcGIS Pro SDK Questions

Offset Polyline(original as drawn) problem in Arcgis pro sdk

tanerkoka — Wed, 13 Dec 2017 07:34:47 GMT

Hi,

We have a offset polyline problem I can not offset polyline as you draw (original as drawn) . How can we solve this important problem ? Or are there any alternative solution? We are using all Offset Types (Mitter ,Bevel , Round , Square) but polyline shape changes, we don not want the line to be different shape .We can offset same polyline in ArcObjects but we can not wit ArcgisPro SDK.

Here is in code and pictures in ArcgisPro SDK below :

Mitter left and right offset in the middle green polyline is original polyline

if (result.RightSide)
offsetGeometry = GeometryEngine.Instance.Offset(feature.GetShape(), distance, OffsetType.Miter, 5) as Polyline;
else
offsetGeometry = GeometryEngine.Instance.Offset(feature.GetShape(), -distance, OffsetType.Miter, 5) as Polyline;

Round left and right offset in the middle green polyline is original polyline

if (result.RightSide)
offsetGeometry = GeometryEngine.Instance.Offset(feature.GetShape(), distance, OffsetType.Round, 0) as Polyline;
else
offsetGeometry = GeometryEngine.Instance.Offset(feature.GetShape(), -distance, OffsetType.Round, 0) as Polyline;

Here is below what we want correct left and right offset code and pictures in ArcObjects :

Left and right offset in the middle green polyline is original polyline.

IConstructCurve constructCurve = new PolylineClass();

constructCurve.ConstructOffset(polycurve, Offset, ref esriConstructOffsetEnum, ref bevelRatio);

Thanks for Helping

Re: Offset Polyline(original as drawn) problem in Arcgis pro sdk

tanerkoka — Wed, 20 Dec 2017 13:39:36 GMT

Hi,

Are there any ide about this question ? Is it bug or not ?

Thanks.

Re: Offset Polyline(original as drawn) problem in Arcgis pro sdk

AnnetteLocke — Wed, 20 Dec 2017 18:16:11 GMT

Hi Taner,

This is the same issue as https://community.esri.com/message/732957-draw-arc-line-offset-problem-in-arcgis-pro-sdk?et=watches.email.thread . It will be fixed in the next release. I am looking into a workaround in the meantime and will keep you posted.

Thanks,

Annette

Re: Offset Polyline(original as drawn) problem in Arcgis pro sdk

tanerkoka — Wed, 31 Jan 2018 14:02:11 GMT

Hi Annette,

Are there any result about this problem ? It is very important for us because it is important for us to draw the right and left offensive roads in our vehicles.

Thanks

Re: Offset Polyline(original as drawn) problem in Arcgis pro sdk

AnnetteLocke — Fri, 02 Feb 2018 18:02:43 GMT

Hi Taner, I am still working on this. I should have some more information for you in a couple of days.

Thanks,

Annette

Re: Offset Polyline(original as drawn) problem in Arcgis pro sdk

AnnetteLocke — Mon, 05 Feb 2018 22:03:18 GMT

Hi Taner,

Thank you for your patience. The fix for this issue is being considered for ArcGIS Pro 2.1.2 with a targeted release date of March 13. I will keep you posted.

Annette

Re: Offset Polyline(original as drawn) problem in Arcgis pro sdk

tanerkoka — Tue, 06 Feb 2018 06:23:10 GMT

Hi Annette,

Thanks for helping.

Re: Offset Polyline(original as drawn) problem in Arcgis pro sdk

AnnetteLocke — Mon, 14 May 2018 23:34:43 GMT

Hi Taner,

I just wanted to let you know that this issue was addressed in ArcGIS Pro 2.1.2.

Annette

Re: Offset Polyline(original as drawn) problem in Arcgis pro sdk

trushar — Fri, 03 Mar 2023 16:58:34 GMT

@AnnetteLocke - would you know if this functionality is broken in ArcGIS Pro 3.1?

I have been struggling with this issue, specifically with line.

1. For bevel ratio where value is < 1 or 0:

Square, Bevel & Miter produces the following output

Round is good

2. For bevel ratio = 1:

Square, Bevel & Miter produces the following output

Round is same as above.

Any thoughts on what is going on?

Thank you again,
Trushar

Edited:

var spatialReference = SpatialReferenceBuilder.CreateSpatialReference(wkid: 4326);

var linePts = new List<MapPoint>
{
    MapPointBuilderEx.CreateMapPoint(00000.10, 00000.10, spatialReference),
    MapPointBuilderEx.CreateMapPoint(00000.20, 00000.50, spatialReference),
    MapPointBuilderEx.CreateMapPoint(00000.30, 00000.10, spatialReference),
    MapPointBuilderEx.CreateMapPoint(00000.40, 00000.10, spatialReference),
    MapPointBuilderEx.CreateMapPoint(00000.50, 00000.80, spatialReference)
};

var polyline = PolylineBuilder.CreatePolyline(linePts, spatialReference);

var g1 = GeometryEngine.Instance.Offset(polyline, 0.10, OffsetType.Square, 0);
var g2 = GeometryEngine.Instance.Offset(polyline, 0.10, OffsetType.Bevel, 0.25);
var g3 = GeometryEngine.Instance.Offset(polyline, 0.10, OffsetType.Miter, 0.1);
var g4 = GeometryEngine.Instance.Offset(polyline, 0.10, OffsetType.Round, 0);


graphicsLayer.AddElement(polyline.GetGraphicLineMct());
graphicsLayer.AddElement(g1.GetGraphicLineMct(SymbolHelper.LineSymbolGreen));
graphicsLayer.AddElement(g2.GetGraphicLineMct(SymbolHelper.LineSymbolPink));
graphicsLayer.AddElement(g3.GetGraphicLineMct(SymbolHelper.LineSymbolPurple));
graphicsLayer.AddElement(g4.GetGraphicLineMct());

Re: Offset Polyline(original as drawn) problem in Arcgis pro sdk

AnnetteLocke — Mon, 06 Mar 2023 17:43:40 GMT

Hi,

I am looking into this. I will respond shortly.

Thank you,

Annette

Re: Offset Polyline(original as drawn) problem in Arcgis pro sdk

trushar — Tue, 14 Mar 2023 16:46:21 GMT

Hello Annette, any word on the above?

While you are at it, I like to find out additional information on the following method "GeometryEngine.Instance.SideBuffer()", if you have any updates please?

Noticed that the LineCapType throws not implemented. See line number ~4820 in "ArcGIS.Core.Geometry.GeometryEngine"

Decompiled code snip from your nuget package:

public ArcGIS.Core.Geometry.Geometry SideBuffer(
  Polyline polyline,
  double distance,
  LeftOrRightSide side,
  LineCapType capType)
{
  GeometryEngine.CheckForNullGeometry((ArcGIS.Core.Geometry.Geometry) polyline);
  if (double.IsNaN(distance) || double.IsInfinity(distance) || distance < 0.0)
    throw new ArgumentException("distance must be greater than zero");
  if (capType == LineCapType.Square)
    throw new ArgumentException(string.Format(GeometryResources.NotImplemented, (object) "LineCapType.Square"));

Re: Offset Polyline(original as drawn) problem in Arcgis pro sdk

AnnetteLocke — Tue, 14 Mar 2023 23:30:00 GMT

This is a bug that will be addressed in a future release. Unfortunately, I can't give you an exact date at this time. I am working on a workaround for you, but I want to test it a little bit more. It will be ready tomorrow.

Regarding SideBuffer, the corners of the buffer will always be round. The LineCapType refers only to the start and end of the line.

Re: Offset Polyline(original as drawn) problem in Arcgis pro sdk

AnnetteLocke — Wed, 15 Mar 2023 20:53:57 GMT

Can you use this workaround?

private Multipart GetOffsetUsingGraphicBuffer(Multipart multipart, double offsetDistance, LineJoinType joinType) { Polygon graphicBuffer = GeometryEngine.Instance.GraphicBuffer(multipart, Math.Abs(offsetDistance), joinType, LineCapType.Square, 4, 0, 96) as Polygon; Polyline boundary = GeometryEngine.Instance.Boundary(graphicBuffer) as Polyline; ProximityResult startResult = GeometryEngine.Instance.NearestPoint(boundary, multipart.Points[0]); Coordinate2D coord = (Coordinate2D)(startResult.Point); Segment firstSegment = multipart.Parts[0][0]; // Negative offset distance means the offset line will be on the left side bool isOnRightSide = PointIsOnRightSide(firstSegment.StartCoordinate, coord, firstSegment.EndCoordinate); if (offsetDistance > 0 && !isOnRightSide) coord.Rotate(Math.PI, (Coordinate2D)(multipart.Points[0])); double distanceAlongCurve1, distanceFromCurve; LeftOrRightSide whichSide; MapPoint point = GeometryEngine.Instance.QueryPointAndDistance(boundary, SegmentExtensionType.NoExtension, coord.ToMapPoint(), AsRatioOrLength.AsRatio, out distanceAlongCurve1, out distanceFromCurve, out whichSide); ProximityResult endResult = GeometryEngine.Instance.NearestPoint(boundary, multipart.Points.Last()); coord = (Coordinate2D)(endResult.Point); if (offsetDistance > 0 && !isOnRightSide) coord.Rotate(Math.PI, (Coordinate2D)(multipart.Points.Last())); double distanceAlongCurve2; point = GeometryEngine.Instance.QueryPointAndDistance(boundary, SegmentExtensionType.NoExtension, coord.ToMapPoint(), AsRatioOrLength.AsRatio, out distanceAlongCurve2, out distanceFromCurve, out whichSide); double d1 = Math.Min(distanceAlongCurve1, distanceAlongCurve2); double d2 = Math.Max(distanceAlongCurve1, distanceAlongCurve2); Polyline subCurve = GeometryEngine.Instance.GetSubCurve(boundary, d1, d2, AsRatioOrLength.AsRatio) as Polyline; return subCurve; } private bool PointIsOnRightSide(Coordinate2D origin, Coordinate2D p1, Coordinate2D p2) { // The result is positive if p1 lies on right side of origin-->p2; double part1 = (p1.X - origin.X) * (p2.Y - origin.Y), part2 = (p1.Y - origin.Y) * (p2.X - origin.X), result = part1 - part2; return result > 0; } // Here is a test public void GEOffsetWorkaroundTest() { SpatialReference spatialReference = SpatialReferences.WGS84; var coords = new List<Coordinate2D> { new Coordinate2D(0.1, 0.1), new Coordinate2D(0.2, 0.5), new Coordinate2D(0.3, 0.1), new Coordinate2D(0.4, 0.1), new Coordinate2D(0.5, 0.8) }; Polyline polyline = PolylineBuilderEx.CreatePolyline(coords, spatialReference) as Polyline; Polyline outputOffsetPolyline = GetOffsetUsingGraphicBuffer(polyline, 0.1, LineJoinType.Miter) as Polyline; File.WriteAllText("C:\\temp\\outputOffsetPolyline_1_.txt", outputOffsetPolyline.ToJson()); outputOffsetPolyline = GetOffsetUsingGraphicBuffer(polyline, -0.1, LineJoinType.Miter) as Polyline; File.WriteAllText("C:\\temp\\outputOffsetPolyline_2_.txt", outputOffsetPolyline.ToJson()); outputOffsetPolyline = GetOffsetUsingGraphicBuffer(polyline, 0.1, LineJoinType.Bevel) as Polyline; File.WriteAllText("C:\\temp\\outputOffsetPolyline_3_.txt", outputOffsetPolyline.ToJson()); outputOffsetPolyline = GetOffsetUsingGraphicBuffer(polyline, -0.1, LineJoinType.Bevel) as Polyline; File.WriteAllText("C:\\temp\\outputOffsetPolyline_4_.txt", outputOffsetPolyline.ToJson()); outputOffsetPolyline = GetOffsetUsingGraphicBuffer(polyline, 0.1, LineJoinType.Round) as Polyline; File.WriteAllText("C:\\temp\\outputOffsetPolyline_5_.txt", outputOffsetPolyline.ToJson()); }

Re: Offset Polyline(original as drawn) problem in Arcgis pro sdk

AnnetteLocke — Mon, 08 Jan 2024 23:47:07 GMT

Hi,

This will be fixed in the ArcGIS Pro 3.3.

Annette