skyline画多边形

1.HTML

<input type="button" value="绘制多边形" id="btnDrawPolygon" />

2. JAVASCRIPT

//绘制多边形
            var pPolygon = null;//多边形对象
            $("#btnDrawPolygon").bind("click", function () {
                //注册地图事件
                SGWorld66.Window.SetInputMode(1);//鼠标样式修改
                SGWorld66.AttachEvent("OnLButtonDown", StartDrawPolygon);
                SGWorld66.AttachEvent("OnFrame", DrawPolygonOnFrame);
                SGWorld66.AttachEvent("OnRButtonUp", StopDrawPolygon)
            })
            //绘制多边形
            var tPolyLine = null;
            function StartDrawPolygon(flags, x, y) {
                //定义渲染样式
                var lineColor, lineWidth = 1, lineOpacity = 1, fillColor, fillOpacity = 0.5;
                lineColor = SGWorld66.Creator.CreateColor(255, 100, 0, 125);//定义线样式
                fillColor = SGWorld66.Creator.CreateColor(100, 255, 0, 125);//定义面样式
                //将屏幕坐标转换为地理坐标
                var pWorldPointInfo = SGWorld66.Window.PixelToWorld(x, y, -1);
                if (null == pWorldPointInfo) {
                    return false;
                }
                try {
                    if (null == pPolygon) {
                        if (!tPolyLine) {
                            var lineGeometry = SGWorld66.Creator.GeometryCreator.CreateLineStringGeometry([pWorldPointInfo.Position, pWorldPointInfo.Position]);
                            tPolyLine = SGWorld66.Creator.CreatePolyline(lineGeometry, lineColor, 2, SGWorld66.ProjectTree.RootID, "线");
                            tPolyLine.Geometry.StartEdit();
                        }
                        else if (tPolyLine.Geometry.Points.Count < 3) {
                            tPolyLine.Geometry.Points.AddPoint(pWorldPointInfo.Position.X, pWorldPointInfo.Position.Y, pWorldPointInfo.Position.Altitude);
                        }
                        else {
                            var points = tPolyLine.Geometry.Points;
                            var ring = SGWorld66.Creator.GeometryCreator.CreateLinearRingGeometry([
                                points.Item(0).X, points.Item(0).Y, points.Item(0).Z,
                                points.Item(1).X, points.Item(1).Y, points.Item(1).Z,
                                points.Item(2).X, points.Item(2).Y, points.Item(2).Z,
                                pWorldPointInfo.Position.X, pWorldPointInfo.Position.Y, pWorldPointInfo.Position.Altitude
                            ]);
                            var polygonGeometry = SGWorld66.Creator.GeometryCreator.CreatePolygonGeometry(ring, null);
                            pPolygon = SGWorld66.Creator.CreatePolygon(polygonGeometry, lineColor, fillColor, 2, SGWorld66.ProjectTree.RootID, "多边形");
                            pPolygon.LineStyle.Width = lineWidth;
                            pPolygon.LineStyle.Color.SetAlpha(lineOpacity);
                            pPolygon.TreeItem.ShowInViewerTree = true;
                            pPolygon.Geometry.StartEdit();
                            //删除临时的线对象
                            SGWorld66.ProjectTree.DeleteItem(tPolyLine.ID);
                            tPolyLine = null;
                        }

                    } else {
                        pPolygon.Geometry.ExteriorRing.Points.AddPoint(pWorldPointInfo.Position.X, pWorldPointInfo.Position.Y, pWorldPointInfo.Position.Altitude);
                    }
                } catch (ex) {
                    alert(ex.description);
                }
            }
            function DrawPolygonOnFrame() {
                //鼠标移动时渲染
                var teWindow, mouseInfo, mouseInfo, point, lastPoint;
                teWindow = SGWorld66.Window;
                mouseInfo = teWindow.GetMouseInfo();
                point = teWindow.PixelToWorld(mouseInfo.X, mouseInfo.Y, 0);
                if (null != tPolyLine) {
                    lastPoint = tPolyLine.Geometry.Points.Item(tPolyLine.Geometry.Points.Count - 1);
                    lastPoint.X = point.Position.X;
                    lastPoint.Y = point.Position.Y;
                    lastPoint.Z = point.Position.Altitude;
                    return;
                }
                if (null == pPolygon) {
                    return;
                }
                lastPoint = pPolygon.Geometry.ExteriorRing.Points.Item(pPolygon.Geometry.ExteriorRing.Points.Count - 1);
                lastPoint.X = point.Position.X;
                lastPoint.Y = point.Position.Y;
                lastPoint.Z = point.Position.Altitude;

            }
            function StopDrawPolygon(flags, x, y) {
                //结束多边形编辑功能
                SGWorld66.DetachEvent("OnLButtonDown", StartDrawPolygon);
                SGWorld66.DetachEvent("OnRButtonUp", StopDrawPolygon);
                SGWorld66.DetachEvent("OnFrame", DrawPolygonOnFrame);
                pPolygon = null;
                SGWorld66.Window.SetInputMode(0);//鼠标恢复效果
            }

Javascript Code