var DrawPolygon = {
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SG: null,
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polygon: null,
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callback: null,
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isDrawing: false,
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isEditing: false,
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groupName: "图形绘制",
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polygonName: "_polygon_",
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// 开始
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start: function (callback) {
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try {
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if (this.isDrawing) {
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return;
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}
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this.polygon = null;
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this.isDrawing = true;
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this.isEditing = false;
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this.callback = callback;
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this.SG.Window.SetInputMode(1);
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//this.SG.Application.CPUSaveMode = true;
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this.addEvent();
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} catch (e) {
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console.error(e);
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}
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},
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// 获取组ID
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getGid: function () {
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var gid = this.SG.ProjectTree.FindItem(this.groupName);
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if (gid) return gid;
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return this.SG.ProjectTree.CreateGroup(this.groupName);
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},
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// 删除组
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delGroup:function(){
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var gid = this.SG.ProjectTree.FindItem(this.groupName);
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if (gid) {
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this.SG.ProjectTree.DeleteItem(gid);
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}
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},
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// 添加事件
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addEvent: function () {
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this.SG.AttachEvent("OnLButtonDown", this.onLButtonDown);
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this.SG.AttachEvent("OnRButtonDown", this.onRButtonDown);
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this.SG.AttachEvent("OnFrame", this.onFrame);
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},
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// 移除事件
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rmEvent: function () {
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this.SG.DetachEvent("OnLButtonDown", this.onLButtonDown);
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this.SG.DetachEvent("OnRButtonDown", this.onRButtonDown);
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this.SG.DetachEvent("OnFrame", this.onFrame);
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},
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// 左键按下事件
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onLButtonDown: function (Flags, X, Y) {
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var _this = DrawPolygon;
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try {
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if (X < 0 || Y < 0 || _this.isEditing) {
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return;
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}
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var wpi = _this.SG.Window.PixelToWorld(X, Y, -1); // 0-Terrain
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wpi.Position.ChangeAltitudeType(3); // 0-RELATIVE，3-ABSOLUTE
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if (wpi.Position.X == 0 || wpi.Position.Y == 0) {
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return;
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}
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_this.isEditing = true;
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if (_this.polygon) {
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_this.polygon.Geometry.ExteriorRing.Points.AddPoint(wpi.Position.X, wpi.Position.Y, wpi.Position.Altitude);
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} else {
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_this.polygon = _this.createPolygon(wpi);
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_this.polygon.Geometry.StartEdit();
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}
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_this.isEditing = false;
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} catch (e) {
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_this.isEditing = false;
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console.error(e);
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}
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return true;
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},
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// 创建多边形
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createPolygon: function (wpi) {
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var arr = [
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wpi.Position.X,
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wpi.Position.Y,
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wpi.Position.Altitude,
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wpi.Position.X + 0.0000001,
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wpi.Position.Y + 0.0000001,
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wpi.Position.Altitude,
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wpi.Position.X + 0.0000002,
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wpi.Position.Y + 0.0000002,
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wpi.Position.Altitude
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];
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var gid = this.SG.ProjectTree.FindItem(this.groupName);
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if (!gid) {
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gid = this.SG.ProjectTree.CreateLockedGroup(this.groupName, this.SG.ProjectTree.RootID);
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}
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var id = this.SG.ProjectTree.FindItem(this.groupName + "\\" + this.polygonName);
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if (id) {
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this.SG.ProjectTree.DeleteItem(id);
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}
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var fillColor = this.SG.Creator.CreateColor(255, 0, 0, 51);
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var ring = this.SG.Creator.GeometryCreator.CreateLinearRingGeometry(arr);
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var geometry = this.SG.Creator.GeometryCreator.CreatePolygonGeometry(ring, null);
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var polygon = this.SG.Creator.CreatePolygon(geometry, "#ff0000", fillColor, 3, gid, this.polygonName);//2-ON_TERRAIN, 3-ABSOLUTE, 1-PIVOT_RELATIVE, 0-TERRAIN_RELATIVE
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return polygon;
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},
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// 右键按下事件
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onRButtonDown: function (Flags, X, Y) {
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try {
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DrawPolygon.end();
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} catch (e) {
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console.error(e);
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}
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return true;
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},
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// 帧事件
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onFrame: function () {
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try {
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var _this = DrawPolygon;
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if (_this.polygon == null || _this.isEditing) {
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return;
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}
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var mi = _this.SG.Window.GetMouseInfo();
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if (mi.X < 0 || mi.Y < 0) {
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return;
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}
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var wpi = _this.SG.Window.PixelToWorld(mi.X, mi.Y, -1); // 0-Terrain
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wpi.Position.ChangeAltitudeType(3);
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if (wpi.Position.X == 0 || wpi.Position.Y == 0) {
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return;
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}
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var p = _this.polygon.Geometry.ExteriorRing.Points.Item(_this.polygon.Geometry.ExteriorRing.Points.Count - 1);
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p.X = wpi.Position.X;
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p.Y = wpi.Position.Y;
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p.Z = wpi.Position.Altitude;
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} catch (e) {
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console.error(e);
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}
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},
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// 结束
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end: function () {
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this.rmEvent();
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if (this.polygon) {
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if (this.polygon.Geometry.ExteriorRing.Points.Count < 5) {
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this.polygon.Geometry.EndEdit();
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this.SG.ProjectTree.DeleteItem(this.polygon.ID);
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this.polygon = null;
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} else {
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this.polygon.Geometry.ExteriorRing.Points.DeletePoint(1);
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this.polygon.Geometry.ExteriorRing.Points.DeletePoint(this.polygon.Geometry.ExteriorRing.Points.Count - 1);
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this.polygon.Geometry.EndEdit();
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}
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}
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//this.SG.ProjectTree.EndEdit();
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this.SG.Window.SetInputMode(0);
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this.isEditing = false;
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this.isDrawing = false;
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if (this.callback) {
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this.callback(this.polygon);
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}
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}
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};
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