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> }

private static JPanel wrapInTitledPanel( Component component, final JLabel label )
{
final JPanel panel = new JPanel( new BorderLayout() );
panel.add( component, BorderLayout.CENTER );
panel.add( label, BorderLayout.NORTH );
return panel;
}

private static void createUi( final Component view3D, final JComponent view2D )
{
final JPanel mainPanel = new JPanel( new BorderLayout() );
// Add a menu also to demonstrate that the 3D view runs inside swing / awt.
// TODO: The menu must be converted to a heavyweight awt component to overdraw the 3D awt canvas…
// That requires using an AWT Frame, and that makes it hard to add Swing components.
mainPanel.add( createMenuBar(), BorderLayout.NORTH );
// Show that menu renders on top of swing component but not awt canvas
mainPanel.add( new JLabel( ” ” ), BorderLayout.WEST );
// TODO: Do this already at the Renderer3D level if not otherwise solvable.
// Wrap the 3D canvas in another JPanel, as it seems to have redraw problems otherwise?
final JPanel view3DHolder = new JPanel( new BorderLayout() );
view3DHolder.add( view3D, BorderLayout.CENTER );
// Put 2D and 3D view in a split pane.
final JSplitPane splitPane = new JSplitPane( JSplitPane.HORIZONTAL_SPLIT, view3DHolder, view2D );
splitPane.setDividerLocation( 500 );
splitPane.setOneTouchExpandable( true );
mainPanel.add( splitPane, BorderLayout.CENTER );
showInFrame( mainPanel, “3D Map Demo” );
}

private static void showInFrame( final Component view, final String frameTitle )
{
final JFrame frame3D = new JFrame( frameTitle );
final JPanel container = new JPanel( new BorderLayout() );
container.setPreferredSize( new Dimension( 800, 600 ) );
frame3D.getContentPane().add( container );
container.add( view, BorderLayout.CENTER );
frame3D.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
frame3D.pack();
frame3D.setVisible( true );
}

private static JMenuBar createMenuBar()
{
final JMenuBar menuBar = new JMenuBar();
final JMenu menu = new JMenu( “Demo” );
menuBar.add( menu );
menu.add( new AbstractAction( “Exit” )
{
public void actionPerformed( final ActionEvent e )
{
System.exit( 0 );
}
} );
return menuBar;
}

private static MapContext createContextFromShapefile( final URL shape )
throws IOException
{
return createContextFromShapefile( shape, null );
}
private static MapContext createContextFromShapefile( final URL shape, final URL sld )
throws IOException
{
return loadShapefile( shape, loadStyle( sld ) );
}
private static Style loadStyle( final URL sld )
throws IOException
{
final Style style;
if ( sld != null )
{
final StyleFactory styleFactory = CommonFactoryFinder.getStyleFactory( null );
final SLDParser stylereader = new SLDParser( styleFactory, sld );
final Style[] styles = stylereader.readXML();
style = styles[ 0 ];
}
else
{
style = new BasicLineStyle();
}
return style;
}
private static MapContext loadShapefile( final URL shape, final Style style )
throws IOException
{
final ShapefileDataStore shapefileDataStore = new ShapefileDataStore( shape );
final FeatureSource featureSource = shapefileDataStore.getFeatureSource();
CoordinateReferenceSystem crs = featureSource.getSchema().getDefaultGeometry().getCoordinateSystem();
if ( crs == null )
{
crs = DefaultGeographicCRS.WGS84;
}
final MapContext context = new DefaultMapContext( crs );
context.addLayer( featureSource, style );
context.getLayerBounds();
return context;
}
}

三维GIS运行效果:

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