1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
2
3 <html xmlns="http://www.w3.org/1999/xhtml">
4 <head>
5 <title></title>
6 <script type = "text/javascript" language = "javascript">
7 var gPolyObj = null;
8 function CreateSGObj() {
9 var obj = $("sgworld");
10 if (obj == null) {
11 obj = document.createElement('object');
12 document.body.appendChild(obj);
13 obj.name = "sgworld";
14 obj.id = "sgworld";
15 obj.classid = "CLSID:3a4f91b0-65a8-11d5-85c1-0001023952c1";
16 }
17 return obj;
18 }
19 function $(id) {
20 return window.document.getElementById(id);
21 }
22 //********************************************绘制多边形
23 var gPolylineText = gPolygonText = "Test";
24 var gDrawPolyClick = null;
25
26 function DrawPolyLButtonDown(Flags, X, Y) {
27 var SGWorld = CreateSGObj();
28 var CursorCoord = SGWorld.Window.pixelToWorld(X, Y);
29 if (CursorCoord == null)
30 return false;
31
32 if (gPolyObj == null) {
33 // We always start with a polyline and change it to Polygon (for area) after the second click)
34 var myGeometry = SGWorld.Creator.GeometryCreator.CreateLineStringGeometry([CursorCoord.Position.x, CursorCoord.Position.y, 0, CursorCoord.Position.x, CursorCoord.Position.y, 0])
35 gPolyObj = SGWorld.Creator.createPolyline(myGeometry, SGWorld.Creator.CreateColor(0, 255, 0, 1), 2, 0, gPolylineText);
36 gPolyObj.LineStyle.Width = 1;
37 gPolyObj.Geometry.StartEdit();
38
39 }
40 else {
41 if (gPolyMethod == 2) // Polygon
42 {
43 if (gPolyObj.ObjectType == 1) {
44 // Deleting the temporary line
45 var x = gPolyObj.Geometry.Points.Item(0).X;
46 var y = gPolyObj.Geometry.Points.Item(0).Y;
47 SGWorld.Creator.DeleteObject(gPolyObj.ID);
48
49 // Creating the polygon
50 var myGeometry = SGWorld.Creator.GeometryCreator.CreateLinearRingGeometry([x, y, 0, CursorCoord.Position.x, CursorCoord.Position.y, 0, CursorCoord.Position.x, CursorCoord.Position.y, 0])
51 gPolyObj = SGWorld.Creator.createPolygon(myGeometry, SGWorld.Creator.CreateColor(0, 255, 0, 1), SGWorld.Creator.CreateColor(0, 255, 0, 0.5), 2, 0, gPolygonText);
52 gPolyObj.LineStyle.Width = 1;
53 gPolyObj.Terrain.GroundObject = true;
54 gPolyObj.Geometry.StartEdit();
55 }
56 else {
57 gPolyObj.Geometry.Rings(0).Points.Item(gPolyObj.Geometry.Rings(0).Points.count - 1).X = CursorCoord.Position.x;
58 gPolyObj.Geometry.Rings(0).Points.Item(gPolyObj.Geometry.Rings(0).Points.count - 1).Y = CursorCoord.Position.y;
59 gPolyObj.Geometry.Rings(0).Points.Item(gPolyObj.Geometry.Rings(0).Points.count - 1).Z = 0;
60 gPolyObj.Geometry.Rings(0).Points.AddPoint(CursorCoord.Position.x, CursorCoord.Position.y, 0);
61 }
62 }
63 else {
64 gPolyObj.Geometry.Points.Item(gPolyObj.Geometry.Points.count - 1).X = CursorCoord.Position.x;
65 gPolyObj.Geometry.Points.Item(gPolyObj.Geometry.Points.count - 1).Y = CursorCoord.Position.y;
66 gPolyObj.Geometry.Points.Item(gPolyObj.Geometry.Points.count - 1).Z = 0;
67 gPolyObj.Geometry.Points.AddPoint(CursorCoord.Position.x, CursorCoord.Position.y, 0);
68 }
69 }
70 // if (gDrawPolyClick != null)
71 // gDrawPolyClick(gPolyObj.Geometry, gPolyObj.ObjectType);
72 // return true;
73 }
74 //-----------
75 // onFrame
76 //-----------
77 function DrawPolyOnFrame() {
78 var SGWorld = CreateSGObj();
79 if (gPolyObj != null) {
80 try {
81 var mouseInfo = SGWorld.Window.GetMouseInfo()
82 var CursorCoord = SGWorld.Window.pixelToWorld(mouseInfo.X, mouseInfo.Y);
83 if (CursorCoord == null)
84 return false;
85 if (gPolyObj.ObjectType == 2) {
86 gPolyObj.Geometry.Rings(0).Points.Item(gPolyObj.Geometry.Rings(0).Points.count - 1).X = CursorCoord.Position.x;
87 gPolyObj.Geometry.Rings(0).Points.Item(gPolyObj.Geometry.Rings(0).Points.count - 1).Y = CursorCoord.Position.y;
88 gPolyObj.Geometry.Rings(0).Points.Item(gPolyObj.Geometry.Rings(0).Points.count - 1).Z = 0;
89 }
90 else {
91 gPolyObj.Geometry.Points.Item(gPolyObj.Geometry.Points.count - 1).X = CursorCoord.Position.x;
92 gPolyObj.Geometry.Points.Item(gPolyObj.Geometry.Points.count - 1).Y = CursorCoord.Position.y;
93 gPolyObj.Geometry.Points.Item(gPolyObj.Geometry.Points.count - 1).Z = 0;
94 }
95 }
96 catch (e) { }
97 }
98 }
99
100 //-------------
101 //DrawPolyInputModeChanged
102 function DrawPolyInputModeChanged(NewMode) {
103
104 // if (NewMode != 1)
105 // if (gPolyObj != null)
106 // Reset(0, 1);
107 }
108 //-------------
109 // DrawPolyRButtonUp
110 function DrawPolyRButtonUp(Flags, X, Y) {
111 var SGWorld = CreateSGObj();
112 if (gPolyObj == null || ((gPolyObj.ObjectType == 1 && gPolyObj.Geometry.Points.count <= 2) || (gPolyObj.ObjectType == 2 && gPolyObj.Geometry.Rings(0).Points.count <= 3))) {
113 // Reset(0, 0);
114 return false;
115 }
116 if (gPolyObj.ObjectType == 1)
117 gPolyObj.Geometry.Points.DeletePoint(gPolyObj.Geometry.Points.count - 1);
118 else
119 gPolyObj.Geometry.Rings(0).Points.DeletePoint(gPolyObj.Geometry.Rings(0).Points.count - 1);
120
121 gPolyObj.Geometry.EndEdit();
122
123 gPolyObj = null;
124 gPolyMethod = null;
125 return true;
126 }
127
128 function ExCreate(value) {
129 var SGWorld = CreateSGObj();
130 if (value == 0) {
131 gPolyMethod = 1;
132 SGWorld.AttachEvent("OnLButtonDown", DrawPolyLButtonDown);
133 SGWorld.AttachEvent("OnRButtonUp", DrawPolyRButtonUp);
134 //SGWorld.AttachEvent("OnFrame", DrawPolyOnFrame);
135 }
136 else if (value == 1)
137 {
138 gPolyMethod = 2;
139 SGWorld.AttachEvent("OnLButtonDown", DrawPolyLButtonDown);
140 SGWorld.AttachEvent("OnRButtonUp", DrawPolyRButtonUp);
141 //SGWorld.AttachEvent("OnFrame", DrawPolyOnFrame);
142 }
143 else
144 {
145
146 }
147 }
148 </script>
149 </head>
150 <body>
151 <table>
152 <tr>
153 <td>
154 <input id="Button1" type="button" value="线Polyline" onclick="ExCreate(0)" />
155 </td>
156 </tr>
157 <tr>
158 <td>
159 <input id="Button2" type="button" value="多边形Polygon" onclick="ExCreate(1)" />
160 </td>
161 </tr>
162 </table>
163 </body>
164 </html>
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