1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
/*
* Copyright 2018 Esri.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.esri.samples.densify_and_generalize;
import javafx.fxml.FXML;
import javafx.scene.control.CheckBox;
import javafx.scene.control.Slider;
import javafx.scene.paint.Color;
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.geometry.GeometryEngine;
import com.esri.arcgisruntime.geometry.Multipoint;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.PointCollection;
import com.esri.arcgisruntime.geometry.Polyline;
import com.esri.arcgisruntime.geometry.SpatialReference;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.BasemapStyle;
import com.esri.arcgisruntime.mapping.view.Graphic;
import com.esri.arcgisruntime.mapping.view.GraphicsOverlay;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.symbology.SimpleLineSymbol;
import com.esri.arcgisruntime.symbology.SimpleMarkerSymbol;
public class DensifyAndGeneralizeController {
@FXML private MapView mapView;
@FXML private Slider maxSegmentLengthSlider;
@FXML private Slider maxDeviationSlider;
@FXML private CheckBox resultVisibilityCheckBox;
@FXML private CheckBox densifyCheckBox;
@FXML private CheckBox generalizeCheckBox;
private Polyline originalPolyline;
private Graphic resultPointsGraphic;
private Graphic resultPolylineGraphic;
@FXML
public void initialize() {
// authentication with an API key or named user is required to access basemaps and other location services
String yourAPIKey = System.getProperty("apiKey");
ArcGISRuntimeEnvironment.setApiKey(yourAPIKey);
// create a map with the streets night basemap style
ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_STREETS_NIGHT);
// set the map to the map view
mapView.setMap(map);
// create a graphics overlay
GraphicsOverlay graphicsOverlay = new GraphicsOverlay();
mapView.getGraphicsOverlays().add(graphicsOverlay);
// create some points along a river for the original geometry
PointCollection points = createShipPoints();
// show the original points as red dots on the map
Multipoint originalMultipoint = new Multipoint(points);
Graphic originalPointsGraphic = new Graphic(originalMultipoint, new SimpleMarkerSymbol(SimpleMarkerSymbol.Style.CIRCLE,
Color.RED, 7));
graphicsOverlay.getGraphics().add(originalPointsGraphic);
// show a dotted red line connecting the original points
originalPolyline = new Polyline(points);
Graphic originalPolylineGraphic = new Graphic(originalPolyline, new SimpleLineSymbol(SimpleLineSymbol.Style.DOT,
Color.RED, 3));
graphicsOverlay.getGraphics().add(originalPolylineGraphic);
// show the result (densified and generalized) points as magenta dots on the map
resultPointsGraphic = new Graphic();
resultPointsGraphic.setSymbol(new SimpleMarkerSymbol(SimpleMarkerSymbol.Style.CIRCLE, Color.MAGENTA, 7));
graphicsOverlay.getGraphics().add(resultPointsGraphic);
// connect the result points with a magenta line
resultPolylineGraphic = new Graphic();
resultPolylineGraphic.setSymbol(new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, Color.MAGENTA, 3));
graphicsOverlay.getGraphics().add(resultPolylineGraphic);
// update the densified/generalized parameters when the slider values change
maxSegmentLengthSlider.valueProperty().addListener(o -> updateGeometry());
maxDeviationSlider.valueProperty().addListener(o -> updateGeometry());
// set initial values
maxSegmentLengthSlider.setValue(100);
maxDeviationSlider.setValue(10);
// zoom to the original polyline
mapView.setViewpointGeometryAsync(originalPolyline.getExtent(), 100);
}
/**
* Called when any of the densify/generalize option values are changed. Applies the densify and generalize
* operations to the original polyline and updates the result graphics with the result geometry.
*/
@FXML
private void updateGeometry() {
Polyline polyline = originalPolyline;
if (generalizeCheckBox.isSelected()) {
polyline = (Polyline) GeometryEngine.generalize(polyline, maxDeviationSlider.getValue(), true);
}
if (densifyCheckBox.isSelected()) {
polyline = (Polyline) GeometryEngine.densify(polyline, maxSegmentLengthSlider.getValue());
}
resultPolylineGraphic.setGeometry(polyline);
Multipoint multipoint = new Multipoint(polyline.getParts().getPartsAsPoints());
resultPointsGraphic.setGeometry(multipoint);
}
/**
* Toggles the visibility of the result graphics depending on the state of the result visibility checkbox.
*/
@FXML
private void updateResultVisibility() {
resultPolylineGraphic.setVisible(resultVisibilityCheckBox.isSelected());
resultPointsGraphic.setVisible(resultVisibilityCheckBox.isSelected());
}
/**
* Creates a collection of points along the Willamette River in Portland, OR.
*
* @return points
*/
private PointCollection createShipPoints() {
PointCollection points = new PointCollection(SpatialReference.create(32126));
points.add(new Point(2330611.130549, 202360.002957, 0.000000));
points.add(new Point(2330583.834672, 202525.984012, 0.000000));
points.add(new Point(2330574.164902, 202691.488009, 0.000000));
points.add(new Point(2330689.292623, 203170.045888, 0.000000));
points.add(new Point(2330696.773344, 203317.495798, 0.000000));
points.add(new Point(2330691.419723, 203380.917080, 0.000000));
points.add(new Point(2330435.065296, 203816.662457, 0.000000));
points.add(new Point(2330369.500800, 204329.861789, 0.000000));
points.add(new Point(2330400.929891, 204712.129673, 0.000000));
points.add(new Point(2330484.300447, 204927.797132, 0.000000));
points.add(new Point(2330514.469919, 205000.792463, 0.000000));
points.add(new Point(2330638.099138, 205271.601116, 0.000000));
points.add(new Point(2330725.315888, 205631.231308, 0.000000));
points.add(new Point(2330755.640702, 206433.354860, 0.000000));
points.add(new Point(2330680.644719, 206660.240923, 0.000000));
points.add(new Point(2330386.957926, 207340.947204, 0.000000));
points.add(new Point(2330485.861737, 207742.298501, 0.000000));
return points;
}
/**
* Stops and releases all resources used in application.
*/
void terminate() {
if (mapView != null) {
mapView.dispose();
}
}
}