Is there any control to draw a 3D polyline on a SceneView?

PeterChen1

Is there any existing control to draw a 3D polyline on a sceneView? similar to SketchEditor on MapView?

JenniferNery

There currently is no SketchEditor for SceneView but you should be able to use PolylineBuilder and GeoViewTapped events. Something like this. 

PolylineBuilder builder <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">PolylineBuilder</SPAN><SPAN class="punctuation token">(</SPAN>SpatialReferences<SPAN class="punctuation token">.</SPAN>Wgs84<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">private</SPAN> <SPAN class="keyword token">void</SPAN> <SPAN class="token function">MySceneView_GeoViewTapped</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">object</SPAN> sender<SPAN class="punctuation token">,</SPAN> GeoViewInputEventArgs e<SPAN class="punctuation token">)</SPAN>
<SPAN class="punctuation token">{</SPAN>
&nbsp;&nbsp;&nbsp; builder<SPAN class="punctuation token">.</SPAN><SPAN class="token function">AddPoint</SPAN><SPAN class="punctuation token">(</SPAN>e<SPAN class="punctuation token">.</SPAN>Location<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">var</SPAN> overlay <SPAN class="operator token">=</SPAN> MySceneView<SPAN class="punctuation token">.</SPAN>GraphicsOverlays<SPAN class="punctuation token">.</SPAN><SPAN class="token function">FirstOrDefault</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">var</SPAN> graphic <SPAN class="operator token">=</SPAN> overlay<SPAN class="punctuation token">.</SPAN>Graphics<SPAN class="punctuation token">.</SPAN><SPAN class="token function">FirstOrDefault</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>graphic <SPAN class="operator token">==</SPAN> <SPAN class="keyword token">null</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; overlay<SPAN class="punctuation token">.</SPAN>Graphics<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Add</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">Graphic</SPAN><SPAN class="punctuation token">(</SPAN>builder<SPAN class="punctuation token">.</SPAN><SPAN class="token function">ToGeometry</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">SimpleLineSymbol</SPAN><SPAN class="punctuation token">(</SPAN>SimpleLineSymbolStyle<SPAN class="punctuation token">.</SPAN>Solid<SPAN class="punctuation token">,</SPAN> Color<SPAN class="punctuation token">.</SPAN>Red<SPAN class="punctuation token">,</SPAN> <SPAN class="number token">3</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; graphic<SPAN class="punctuation token">.</SPAN>Geometry <SPAN class="operator token">=</SPAN> builder<SPAN class="punctuation token">.</SPAN><SPAN class="token function">ToGeometry</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="punctuation token">}</SPAN>‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

In sample code above, we use tapped location but if you have 3D objects you want considered (i.e. buildings in ArcGISSceneLayer), you might want to use this location instead.

<SPAN class="keyword token">var</SPAN> location <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">await</SPAN> MySceneView<SPAN class="punctuation token">.</SPAN><SPAN class="token function">ScreenToLocationAsync</SPAN><SPAN class="punctuation token">(</SPAN>e<SPAN class="punctuation token">.</SPAN>Position<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN></SPAN>

Meanwhile, you can try looking into one of our demo apps originally written against ArcGIS Runtime for .NET 10.x. I updated it slightly to use 100.x in this branch. I hope it will help you get started.