Creating a toolbar of globe tools
PointElement.cs
// Copyright 2012 ESRI
// 
// All rights reserved under the copyright laws of the United States
// and applicable international laws, treaties, and conventions.
// 
// You may freely redistribute and use this sample code, with or
// without modification, provided you include the original copyright
// notice and use restrictions.
// 
// See the use restrictions.
// 

using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Analyst3D;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.GlobeCore;

namespace GlobeGraphicsToolbar
{
    public class PointElement
    {
        private IElement _element;
        private IGlobeGraphicsElementProperties _elementProperties;

        public PointElement(IGeometry geometry, double size, esriSimpleMarkerStyle simpleMarkerStyle)
        {
            _element = GetElement(geometry, size, simpleMarkerStyle);
            _elementProperties = GetElementProperties();
        }

        public PointElement(IGeometry geometry, double size, esriSimple3DMarkerStyle simple3DMarkerStyle)
        {
            _element = GetElement(geometry, size, simple3DMarkerStyle);
            _elementProperties = GetElementProperties();
        }

        private IElement GetElement(IGeometry geometry, double size, esriSimpleMarkerStyle simpleMarkerStyle)
        {
            IElement element;

            IMarkerElement markerElement = new MarkerElementClass();
            element = markerElement as IElement;

            ISimpleMarkerSymbol simpleMarkerSymbol = new SimpleMarkerSymbolClass();
            simpleMarkerSymbol.Style = simpleMarkerStyle;
            simpleMarkerSymbol.Color = ColorSelection.GetColor();
            simpleMarkerSymbol.Size = size;

            element.Geometry = geometry;

            markerElement.Symbol = simpleMarkerSymbol;

            return element;
        }

        private IElement GetElement(IGeometry geometry, double size, esriSimple3DMarkerStyle simple3DMarkerStyle)
        {
            IElement element;

            IMarkerElement markerElement = new MarkerElementClass();
            element = markerElement as IElement;

            ISimpleMarker3DSymbol simpleMarker3DSymbol = new SimpleMarker3DSymbolClass();
            simpleMarker3DSymbol.Style = simple3DMarkerStyle;
            simpleMarker3DSymbol.ResolutionQuality = GetResolutionQuality();

            IMarkerSymbol markerSymbol = simpleMarker3DSymbol as IMarkerSymbol;
            markerSymbol.Color = ColorSelection.GetColor();
            markerSymbol.Size = size;

            IMarker3DPlacement marker3DPlacement = markerSymbol as IMarker3DPlacement;
            SetMarker3DPlacement(marker3DPlacement, markerSymbol.Size);

            element.Geometry = geometry;

            markerElement.Symbol = markerSymbol;

            return element;
        }

        private double GetResolutionQuality()
        {
            const double HighQuality = 1.0;

            return HighQuality;
        }

        private void SetMarker3DPlacement(IMarker3DPlacement marker3DPlacement, double size)
        {
            const double XOffset = 0;
            const double YOffset = 0;

            marker3DPlacement.XOffset = XOffset;
            marker3DPlacement.YOffset = YOffset;
            marker3DPlacement.ZOffset = size / 2;
        }

        private IGlobeGraphicsElementProperties GetElementProperties()
        {
            IGlobeGraphicsElementProperties elementProperties = new GlobeGraphicsElementPropertiesClass();
            elementProperties.DrapeElement = true;
            elementProperties.Illuminate = true;

            return elementProperties;
        }

        public IElement Element
        {
            get
            {
                return _element;
            }
        }

        public IGlobeGraphicsElementProperties ElementProperties
        {
            get
            {
                return _elementProperties;
            }
        }
    }
}