GEoTools学习笔记—显示三维效果–geotools-renderer3d

/*<br /> * GeoTools – The Open Source Java GIS Toolkit<br /> * http://geotools.org<br /> *<br /> * (C) 2007-2008, Open Source Geospatial Foundation (OSGeo)<br /> *<br /> * This library is free software; you can redistribute it and/or<br /> * modify it under the terms of the GNU Lesser General Public<br /> * License as published by the Free Software Foundation;<br /> * version 2.1 of the License.<br /> *<br /> * This library is distributed in the hope that it will be useful,<br /> * but WITHOUT ANY WARRANTY; without even the implied warranty of<br /> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU<br /> * Lesser General Public License for more details.<br /> */<br /> package org.geotools.renderer3d.example;<br /> import org.geotools.data.FeatureSource;<br /> import org.geotools.data.shapefile.ShapefileDataStore;<br /> import org.geotools.factory.CommonFactoryFinder;<br /> import org.geotools.gui.swing.JMapPane;<br /> import org.geotools.map.DefaultMapContext;<br /> import org.geotools.map.MapContext;<br /> import org.geotools.referencing.crs.DefaultGeographicCRS;<br /> import org.geotools.renderer.lite.StreamingRenderer;<br /> import org.geotools.renderer3d.Renderer3D;<br /> import org.geotools.renderer3d.Renderer3DImpl;<br /> import org.geotools.renderer3d.utils.canvas3d.FrameListener;<br /> import org.geotools.styling.BasicLineStyle;<br /> import org.geotools.styling.SLDParser;<br /> import org.geotools.styling.Style;<br /> import org.geotools.styling.StyleFactory;<br /> import org.opengis.referencing.crs.CoordinateReferenceSystem;<br /> import javax.swing.*;<br /> import java.awt.BorderLayout;<br /> import java.awt.Component;<br /> import java.awt.Cursor;<br /> import java.awt.Dimension;<br /> import java.awt.event.ActionEvent;<br /> import java.io.IOException;<br /> import java.net.URL;<br /> /**<br /> * An example of using the 3D map.<br /> *<br /> * @author Hans H鋑gstr鰉<br /> */<br /> public class Show3DMapExample<br /> {<br /> //======================================================================<br /> // Public Methods<br /> //———————————————————————-<br /> // Main Method<br /> public static void main( String[] args ) throws IOException<br /> {<br /> // Create some data<br /> /* DEBUG:<br /> final ExampleDataGenerator exampleDataGenerator = new ExampleDataGenerator();<br /> final MapContext exampleMap = exampleDataGenerator.createExampleMap();<br /> */<br /> final MapContext exampleMap = createContextFromShapefile( new URL( “file:example_data/countries/countries.shp” ),<br /> new URL( “file:example_data/simple_style.sld” ) );<br /> // Create a 3D renderer<br /> final Renderer3D renderer3D = new Renderer3DImpl( exampleMap );<br /> final Component mapView3D = renderer3D.get3DView();<br /> // Create a 2D renderer with the same data for comparsion<br /> final StreamingRenderer streamingRenderer = new StreamingRenderer();<br /> final JMapPane mapView2D = new JMapPane( streamingRenderer, exampleMap );<br /> mapView2D.setMapArea( exampleMap.getLayerBounds() );<br /> mapView2D.setState( JMapPane.Pan );<br /> mapView2D.setCursor( new Cursor( Cursor.MOVE_CURSOR ) );<br /> // Build and show the rest of the UI<br /> final JLabel labelFor3DView = new JLabel( “3D map renderer” );<br /> createUi( wrapInTitledPanel( mapView3D, labelFor3DView ),<br /> wrapInTitledPanel( mapView2D, new JLabel( “2D JMapPanel view” ) ) );<br /> // Show frames per second in a swing label<br /> renderer3D.addFrameListener( createFpsDisplayer( labelFor3DView, “3D map renderer” ) );<br /> }<br /> //======================================================================<br /> // Private Methods<br /> private static FrameListener createFpsDisplayer( final JLabel labelFor3DView, final String message )<br /> {<br /> return new FrameListener()<br /> {<br /> private double time_s = 0;<br /> private int frames = 0;<br /> public void onFrame( final double secondsSinceLastFrame )<br /> {<br /> time_s += secondsSinceLastFrame;<br /> frames++;<br /> if ( time_s > 1 ) // Calculate average fps over one second<br /> {<br /> final int fps = (int) ( frames / time_s );<br /> labelFor3DView.setText( message + ” (” + fps + ” FPS)” );<br /> time_s = 0;<br /> frames = 0;<br /> }<br /> }<br /> };<br /> }</p> <p> private static JPanel wrapInTitledPanel( Component component, final JLabel label )<br /> {<br /> final JPanel panel = new JPanel( new BorderLayout() );<br /> panel.add( component, BorderLayout.CENTER );<br /> panel.add( label, BorderLayout.NORTH );<br /> return panel;<br /> }</p> <p> private static void createUi( final Component view3D, final JComponent view2D )<br /> {<br /> final JPanel mainPanel = new JPanel( new BorderLayout() );<br /> // Add a menu also to demonstrate that the 3D view runs inside swing / awt.<br /> // TODO: The menu must be converted to a heavyweight awt component to overdraw the 3D awt canvas…<br /> // That requires using an AWT Frame, and that makes it hard to add Swing components.<br /> mainPanel.add( createMenuBar(), BorderLayout.NORTH );<br /> // Show that menu renders on top of swing component but not awt canvas<br /> mainPanel.add( new JLabel( ” ” ), BorderLayout.WEST );<br /> // TODO: Do this already at the Renderer3D level if not otherwise solvable.<br /> // Wrap the 3D canvas in another JPanel, as it seems to have redraw problems otherwise?<br /> final JPanel view3DHolder = new JPanel( new BorderLayout() );<br /> view3DHolder.add( view3D, BorderLayout.CENTER );<br /> // Put 2D and 3D view in a split pane.<br /> final JSplitPane splitPane = new JSplitPane( JSplitPane.HORIZONTAL_SPLIT, view3DHolder, view2D );<br /> splitPane.setDividerLocation( 500 );<br /> splitPane.setOneTouchExpandable( true );<br /> mainPanel.add( splitPane, BorderLayout.CENTER );<br /> showInFrame( mainPanel, “3D Map Demo” );<br /> }</p> <p> private static void showInFrame( final Component view, final String frameTitle )<br /> {<br /> final JFrame frame3D = new JFrame( frameTitle );<br /> final JPanel container = new JPanel( new BorderLayout() );<br /> container.setPreferredSize( new Dimension( 800, 600 ) );<br /> frame3D.getContentPane().add( container );<br /> container.add( view, BorderLayout.CENTER );<br /> frame3D.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );<br /> frame3D.pack();<br /> frame3D.setVisible( true );<br /> }</p> <p> private static JMenuBar createMenuBar()<br /> {<br /> final JMenuBar menuBar = new JMenuBar();<br /> final JMenu menu = new JMenu( “Demo” );<br /> menuBar.add( menu );<br /> menu.add( new AbstractAction( “Exit” )<br /> {<br /> public void actionPerformed( final ActionEvent e )<br /> {<br /> System.exit( 0 );<br /> }<br /> } );<br /> return menuBar;<br /> }</p> <p> private static MapContext createContextFromShapefile( final URL shape )<br /> throws IOException<br /> {<br /> return createContextFromShapefile( shape, null );<br /> }<br /> private static MapContext createContextFromShapefile( final URL shape, final URL sld )<br /> throws IOException<br /> {<br /> return loadShapefile( shape, loadStyle( sld ) );<br /> }<br /> private static Style loadStyle( final URL sld )<br /> throws IOException<br /> {<br /> final Style style;<br /> if ( sld != null )<br /> {<br /> final StyleFactory styleFactory = CommonFactoryFinder.getStyleFactory( null );<br /> final SLDParser stylereader = new SLDParser( styleFactory, sld );<br /> final Style[] styles = stylereader.readXML();<br /> style = styles[ 0 ];<br /> }<br /> else<br /> {<br /> style = new BasicLineStyle();<br /> }<br /> return style;<br /> }<br /> private static MapContext loadShapefile( final URL shape, final Style style )<br /> throws IOException<br /> {<br /> final ShapefileDataStore shapefileDataStore = new ShapefileDataStore( shape );<br /> final FeatureSource featureSource = shapefileDataStore.getFeatureSource();<br /> CoordinateReferenceSystem crs = featureSource.getSchema().getDefaultGeometry().getCoordinateSystem();<br /> if ( crs == null )<br /> {<br /> crs = DefaultGeographicCRS.WGS84;<br /> }<br /> final MapContext context = new DefaultMapContext( crs );<br /> context.addLayer( featureSource, style );<br /> context.getLayerBounds();<br /> return context;<br /> }<br /> }<br />

三维GIS运行效果:

转载自：https://blog.csdn.net/sxausgyy/article/details/8110269