3D注释和PdfLayer

Question

假设我有两个实例 layer1的和二层com.itextpdf.text.pdf.PdfLayer型，与层1将用于com.itextpdf.text.pdf.PdfTemplate类型的实例，其中包含com.itextpdf.text.Image类型和二层的实例将用于类型为com.itextpdf.text.pdf.PdfAnnotation的3D注释。

问题：设置可见性和激活用于二层保留的区域后，我既不能使它（二层）unvisible也不显示层1。

基本代码：

private Document document; 
private PdfWriter writer; 
PdfContentByte upperLayer; 

Rectangle box; 

private PdfLayer view2D; 
private PdfLayer view3D; 

public static void main(String[] args) throws DocumentException, MalformedURLException, URISyntaxException, IOException 
{ 
    LayersWithDiffDimsDemo generator = new LayersWithDiffDimsDemo(); 

    generator.setupResources(); 
    generator.report(); 
    generator.cleanupResources(); 

} 

public void setupResources() throws DocumentException, IOException 
{ 
    document = new Document(PageSize.A4); 

    FileOutputStream outputStream = new FileOutputStream("layers_with_diff_dimensions.pdf"); 
    writer = PdfWriter.getInstance(document, outputStream); 

    document.open(); 
    upperLayer = writer.getDirectContent(); 

    box = new Rectangle(26.0f, document.getPageSize().getHeight() - 455.0f, 550, document.getPageSize().getHeight() - 210.0f); 
    box.setBorder(Rectangle.BOX); 
    box.setBorderWidth(0.5f); 
    box.setBorderColor(new BaseColor(0xFF, 0x00, 0x00)); 
    document.add(box); 

    PdfLayer views = PdfLayer.createTitle("Ansichtsmodi", writer); 

    view2D = new PdfLayer("2D", writer); 
    view2D.setOn(true); 

    view3D = new PdfLayer("3D", writer); 
    view3D.setOn(false); 

    views.addChild(view3D); 
    views.addChild(view2D); 

    ArrayList<PdfLayer> radio = new ArrayList<>(); 
    radio.add(view3D); 
    radio.add(view2D); 
    writer.addOCGRadioGroup(radio); 
} 

public void report() throws URISyntaxException, MalformedURLException, IOException 
{ 
    try 
    { 
     // Output the dimension drawing 
     // teapot.jpg is a screen shot of the 3d model 
     Image imageIn2D = Image.getInstance("teapot.jpg"); 

     imageIn2D.setAbsolutePosition((document.getPageSize().getWidth() - imageIn2D.getWidth())/2, 400.0f); 
     imageIn2D.setLayer(view2D); 
     upperLayer.addImage(imageIn2D, true); 

     try { 
      // The file name that contains the 3D Model 
      FileInputStream inputStream = new FileInputStream("teapot.u3d"); 
      PdfStream stream3D = new PdfStream(inputStream, writer); 
      stream3D.put(PdfName.TYPE, new PdfName("3D")); 
      stream3D.put(PdfName.SUBTYPE, new PdfName("U3D")); 
      stream3D.flateCompress(); 
      try { 
       PdfIndirectObject streamObject = writer.addToBody(stream3D); 
       stream3D.writeLength(); 
       PdfDictionary dict3D = new PdfDictionary(); 
       dict3D.put(PdfName.TYPE, new PdfName("3DView")); 
       dict3D.put(new PdfName("XN"), new PdfString("Default")); 
       dict3D.put(new PdfName("IN"), new PdfString("Unnamed")); 
       dict3D.put(new PdfName("MS"), PdfName.M); 
       dict3D.put(new PdfName("C2W"), new PdfArray(new float[]{1, 0, 0, 0, 0, -1, 0, 1, 0, 3, -235, 28})); 
       dict3D.put(PdfName.CO, new PdfNumber(235)); 
       PdfIndirectObject dictObject = writer.addToBody(dict3D); 
       PdfAnnotation annot = new PdfAnnotation(writer, box); 
       annot.setLayer(view3D); 
       annot.put(PdfName.CONTENTS, new PdfString("3D Model")); 
       annot.put(PdfName.SUBTYPE, new PdfName("3D")); 
       annot.put(PdfName.TYPE, PdfName.ANNOT); 
       annot.put(new PdfName("3DD"), streamObject.getIndirectReference()); 
       annot.put(new PdfName("3DV"), dictObject.getIndirectReference()); 
       PdfAppearance ap = upperLayer.createAppearance(box.getWidth(), box.getHeight()); 
       annot.setAppearance(PdfAnnotation.APPEARANCE_NORMAL, ap); 
       annot.setPage(); 

       upperLayer.addAnnotation(annot, false); 

      } catch (IOException ex) { 
       Logger.getLogger(LayersWithDiffDimsDemo.class.getName()).log(Level.SEVERE, null, ex); 
      } 
     } catch (FileNotFoundException ex) { 
      Logger.getLogger(LayersWithDiffDimsDemo.class.getName()).log(Level.SEVERE, null, ex); 
     } 

    } catch (DocumentException ex) 
    { 
     Logger.getLogger(LayersWithDiffDimsDemo.class.getName()).log(Level.SEVERE, null, ex); 
    } 
} 

public void cleanupResources() 
{ 
    document.close(); 
} 

谢谢你的任何建议！

Answer 1

假设您的查看器是Acrobat或Reader，只要3D注释处于活动状态，它就会显示出来。注释与可见或其他层相关的事实不会改变这一点。

卫冕我的说法...

公开赛http://practicalpdf.com/downloads/BrakeAssembly.pdf文件。

该文件具有单个3D注释占用整个页面，并设置为单击时激活。当文件第一次打开时，它被停用。 3D注释也位于名为“3DAnnot”的图层上，文件初始视图设置为在Reader中打开并显示图层面板。在PDF规范中支持将注释与图层关联，但无法在Acrobat中使用插件或通过库进行创作。

注意当您第一次打开文件时，3D注释不是活动的，您可以切换图层可见性。请注意，注释海报可见性是遵循层可见性。现在点击它激活注释。现在请注意，已激活 3D Annot不受图层可见性的影响。

这是因为图层可见性仅适用于PDF页面内容。 3D注释的海报（外观）是该字典的唯一部分，即页面内容。 3D查看器运行时只是投影到与注释相同的矩形中。虽然处于活动状态，但即使在保存3D注释的顶部添加图层，3D也会始终显示在页面内容上。