这个例子演示了如何创建一个圆，设置其属性，然后飞到它。这个例子使用了 ICreator701 (CreatePosition, CreateColor, CreateCircle, CreateMessage), INavigate701(FlyTo), IPosition701 (Copy, Pitch), IColor701, ITerrainRegularPolygon701 (Radius, Message), IFillStyle701 (Color) 和 ITerraExplorerMessage701 (ID) 接口。

    private void CreateCircle() {
        try {
            UI.runOnRenderThread(new Runnable() {
                @Override
                public void run() {
                    // B.  Create position for circle  1. 为圆创建一个坐标位置
                    // B1. Set position input parameters (San Fransico shore) 1.1 设置坐标位置的参数
                    double dXCoord = -122.49460;
                    double dYCoord = 37.78816;
                    double dAltitude = 100.0;
                    int eAltitudeTypeCode = 0;//AltitudeTypeCode.ATC_TERRAIN_RELATIVE;
                    double dYaw = 0.0;
                    double dPitch = 0.0;
                    double dRoll = 0.0;
                    double dDistance = 5000;
                    // B2. Create Position   1.2创建坐标位置
                    IPosition cPos = ISGWorld.getInstance().getCreator().CreatePosition(dXCoord, dYCoord, dAltitude, eAltitudeTypeCode, dYaw, dPitch, dRoll, dDistance);
                    // C. create FillColor for circle  2.为圆创建颜色
                    //       {
                    // C1. Set fill color input params - RGB and Alpha 2.1设置填充颜色参数
                    int nRed = 0;
                    int nGreen = 255;
                    int nBlue = 0;
                    int nAlpha = 0x7F;
                    // 50% opacity
                    // C2. Create fill color  2.2创建填充颜色
                    IColor cFillColor = ISGWorld.getInstance().getCreator().CreateColor(nRed, nGreen, nBlue, nAlpha);
                    // }
                    // D. Create circle using created position and fill color (for line color use Abgr uint value)
                    //       {
                    // D1. Set circle input params
                    Object nLineColor = 0xFFFF0000;   // Abgr value - Solid blue
                    double dCircleRadius = 200;     // in meters
                    // D2. Create circle       v
                    ITerrainRegularPolygon cCircle = ISGWorld.getInstance().getCreator().CreateCircle(cPos, dCircleRadius, nLineColor, cFillColor, "", "Circle");
                    // }       //       // E. Get and change circle properties       //
                    // {       // E1. Get & Set circle radius
                    double dNewCircleRadius = 300;
                    double dCurrentCircleRadius = cCircle.getRadius();
                    // Get circle radius
                    cCircle.setRadius(dNewCircleRadius);
                    // Set new circle radius
                    // E2. Get fill style and change its properties
                    int nRGB_Red = 0xFF0000;  // uing Rgb - Red color

                    double dAlpha = 0.2;       // 80% transparent
                    IFillStyle cFillStyle = cCircle.getFillStyle();
                    cFillStyle.getColor().FromRGBColor(nRGB_Red);
                    cFillStyle.getColor().SetAlpha(dAlpha);
                    // }       //
                    // F. Add Message to created circle       //
                    // {       // F1. Set message input parameters
                    int eMsgClient = 5; //MsgClient6.MC_POPUP;
                    String tMessage = "Hello Circle";
                    int eMsgType = 0; //MsgType.TYPE_TEXT;
                    boolean bIsBringToFront = true;
                    // F2. Create message and add to circle
                    ITerraExplorerMessage cMessage = ISGWorld.getInstance().getCreator().CreateMessage(eMsgClient, tMessage, eMsgType, bIsBringToFront);
                    cCircle.getMessage().setMessageID(cMessage.getID());
//        }
                    //       // G. FlyTo created circle       //
                    //       {
                    IPosition cFlyToPos = cPos.Copy();
                    cFlyToPos.setPitch(-89.0); // Set camera to look downward on circle
                    ISGWorld.getInstance().getNavigate().FlyTo(cFlyToPos);

//                   }
                }
            });

        } catch (Exception e) {
            Log.e("Tag", e.getMessage());
        }
    }