topic Re: Drawing polygons in the scene in Qt Maps SDK Questions

Drawing polygons in the scene

lsc — Fri, 22 Mar 2024 07:53:17 GMT

I'm trying to draw a 3D polygon in the scene. But I didn't find the right way. Is there any way to achieve this? The function code is as follows:

function addPolygonGraphic() {

// create the polygon by assigning points
polygonBuilder.addPointXYZ(centerX, centerY, 10000);
polygonBuilder.addPointXYZ(centerX + 0.1, centerY, 10000);
polygonBuilder.addPointXYZ(centerX + 0.1, centerY, 10000);
polygonBuilder.addPointXYZ(centerX, centerY, 10000);

// assign the geometry of the graphic to be the polygon
polygonGraphic.geometry = polygonBuilder.geometry;
// add the graphic to the polygon graphics overlay
graphicsOverlay.graphics.append(polygonGraphic);
}

Thank you very much!

Re: Drawing polygons in the scene

LucasDanzinger — Fri, 22 Mar 2024 14:59:07 GMT

Couple of things to consider:

- does the graphics overlay have the surface placement mode set? Here's an example - https://github.com/Esri/arcgis-maps-sdk-samples-qt/blob/main/ArcGISRuntimeSDKQt_QMLSamples/Scenes/SetSurfacePlacementMode/SetSurfacePlacementMode.qml Since you've set z values, you probably want absolute. Here is the doc - https://developers.arcgis.com/qt/qml/api-reference/enums-surfaceplacement.html .

- Have you set the spatial reference of your polygon builder to match whatever the centerX and centerY variables are using?

Re: Drawing polygons in the scene

lsc — Sat, 23 Mar 2024 03:18:07 GMT

Thank you very much!