java Worldwind SurfaceImage深度/批量分拣
我正在使用WorldWind,试图在同一层中“拾取”多个表面图像,但不理解为什么它不起作用
我的印象是:
this.getWwd().getSceneController().setDeepPickEnabled(true);
将使我能够在同一层中选择多个可渲染对象。这似乎适用于除SurfaceImage以外的所有其他情况。我还注意到,如果我强制加载SurfaceImage到不同的层,它会按预期工作
这是我用来测试的代码:
public class SurfaceImageViewer extends ApplicationTemplate
{
public static class AppFrame extends ApplicationTemplate.AppFrame
{
private JFileChooser fileChooser = new JFileChooser();
private JSlider opacitySlider;
private SurfaceImageLayer layer;
private JLabel statusLabel = new JLabel("status: ready");
public AppFrame()
{
super(true, true, false);
this.getWwd().getSceneController().setDeepPickEnabled(true);
try
{
this.layer = new SurfaceImageLayer();
this.layer.setOpacity(1);
this.layer.setPickEnabled(true);
this.layer.setName("Surface Images");
insertBeforeCompass(this.getWwd(), layer);
this.getControlPanel().add(makeControlPanel(), BorderLayout.SOUTH);
}
catch (Exception e)
{
e.printStackTrace();
}
this.getWwd().addSelectListener(new SelectListener() {
@Override
public void selected(SelectEvent event) {
PickedObjectList pol = AppFrame.this.getWwd().getObjectsAtCurrentPosition();
if(event.isLeftClick()){
System.out.println("POL SIZE "+pol.size());
}
}
});
}
Action openElevationsAction = new AbstractAction("Open Elevation File...")
{
public void actionPerformed(ActionEvent e)
{
int status = fileChooser.showOpenDialog(AppFrame.this);
if (status != JFileChooser.APPROVE_OPTION)
return;
final File imageFile = fileChooser.getSelectedFile();
if (imageFile == null)
return;
Thread t = new Thread(new Runnable()
{
public void run()
{
try
{
CompoundElevationModel cem
= (CompoundElevationModel) getWwd().getModel().getGlobe().getElevationModel();
LocalElevationModel em = new LocalElevationModel();
em.addElevations(imageFile.getPath());
cem.addElevationModel(em);
}
catch (IOException e1)
{
e1.printStackTrace();
}
}
});
t.setPriority(Thread.MIN_PRIORITY);
t.start();
}
};
Action openImageAction = new AbstractAction("Open Image File...")
{
public void actionPerformed(ActionEvent actionEvent)
{
int status = fileChooser.showOpenDialog(AppFrame.this);
if (status != JFileChooser.APPROVE_OPTION)
return;
final File imageFile = fileChooser.getSelectedFile();
if (imageFile == null)
return;
Thread t = new Thread(new Runnable()
{
public void run()
{
try
{
statusLabel.setText("status: Loading image");
// TODO: proper threading
layer.addImage(imageFile.getAbsolutePath());
getWwd().redraw();
statusLabel.setText("status: ready");
}
catch (IOException e)
{
e.printStackTrace();
}
}
});
t.setPriority(Thread.MIN_PRIORITY);
t.start();
}
};
private JPanel makeControlPanel()
{
JPanel controlPanel = new JPanel(new GridLayout(0, 1, 5, 5));
JButton openImageButton = new JButton(openImageAction);
controlPanel.add(openImageButton);
this.opacitySlider = new JSlider();
this.opacitySlider.setMaximum(100);
this.opacitySlider.setValue((int) (layer.getOpacity() * 100));
this.opacitySlider.setEnabled(true);
this.opacitySlider.addChangeListener(new ChangeListener()
{
public void stateChanged(ChangeEvent e)
{
int value = opacitySlider.getValue();
layer.setOpacity(value / 100d);
getWwd().redraw();
}
});
JPanel opacityPanel = new JPanel(new BorderLayout(5, 5));
opacityPanel.setBorder(new EmptyBorder(0, 10, 0, 0));
opacityPanel.add(new JLabel("Opacity"), BorderLayout.WEST);
opacityPanel.add(this.opacitySlider, BorderLayout.CENTER);
controlPanel.add(opacityPanel);
JButton openElevationsButton = new JButton(openElevationsAction);
controlPanel.add(openElevationsButton);
controlPanel.add(statusLabel);
controlPanel.setBorder(new EmptyBorder(15, 15, 15, 15));
return controlPanel;
}
}
public static void main(String[] args)
{
ApplicationTemplate.start("World Wind Surface Images", SurfaceImageViewer.AppFrame.class);
}
}
这两个GeoTiff层叠在一起,我一直在用它们来测试这一点。当我左键点击两个GeoTiff时,我希望SelectListener上的println打印出“3”。(我已经将GeoTiff上传到了一个可用的zip here)
<> P>旧金山将看到这些区域,见屏幕截图:
# 1 楼答案
更新:
我们发现,批量挑选的示例都是围绕AbstractSurfaceObject实例展开的,但在本例中并不适用。对于SurfaceImage实例的处理,setAlwaysOnTop的属性应配置为false,这似乎让选择事件处理光标下的所有元素
通过阅读深度采摘的例子,实际上有两件事需要做
我花了一点时间才理解第二个,但它似乎与AbstractSurfaceObject类有关
我相信在这种情况下,我会将SurfaceImageLayer子类化,并覆盖addRenderable方法。我会检查renderable是否是AbstractSurfaceObject的实例,并在将其转发到超类之前禁用批处理拾取
如果要直接拾取的是图像,则开箱即用似乎不受支持。您需要做一些事情,以使SurfaceImageLayer中的SurfaceImageReference对doPick上的RenderableLayer可见。这可能会带来一系列需要注意的新问题
我希望这至少有点帮助
祝你好运