Note: Support for 3D on mobile devices may vary, view the system requirements for more information.

This sample demonstrates how to create graphics with 3D symbols and how to update these graphics using SketchViewModel in a SceneView.

For example, a symbol with ExtrudeSymbol3DLayer is used for drawing extruded building footprints:

const sketchVM = new SketchViewModel({
  layer: gLayer,
  view: view,
  polygonSymbol: {
    type: "polygon-3d",
    symbolLayers: [{
      type: "extrude",
      size: 10, // extrude by 10 meters
      material: {
        color: white
      },
      edges: {
        type: "solid",
        size: "3px",
        color: [82, 82, 122, 0.8]
      }
    }]
  },
  defaultCreateOptions: { hasZ: false }
});

To activate the sketch mode you can call the create() method on the SketchViewModel with the geometry type that should be created:

button.addEventListener("click", function(event) {
  sketchVM.create("polygon");
});

Snapping

Version 4.18 introduced self snapping as a feature in beta. Snapping can be enabled either by setting the snappingOptions property in SketchViewModel or by pressing the CTRL key. When modifying a geometry with snapping, use the top down view for the best user experience.