问题
I am using iText7 (C#) to create the pdf. I need to add a u3d picture to the exising pdf. I can find the example (http://developers.itextpdf.com/examples/itext-action-second-edition/chapter-16#619-pdf3d.java) but it is java one. Can anyone help to give me an example on .net C#?
回答1:
The Linked example is for iText5, not iText7. In iText7 this example would look like this
public static final String DEST = "./target/test/resources/book/part4/chapter16/Listing_16_16_Pdf3D.pdf";
public static String RESOURCE = "./src/test/resources/img/teapot.u3d";
public static void main(String args[]) throws Exception {
new Listing_16_16_Pdf3D().manipulatePdf(DEST);
}
public void manipulatePdf(String dest) throws Exception {
PdfDocument pdfDoc = new PdfDocument(new PdfWriter(dest));
Document doc = new Document(pdfDoc);
Rectangle rect = new Rectangle(100, 400, 400, 400);
PdfStream stream3D = new PdfStream(pdfDoc, new FileInputStream(RESOURCE));
stream3D.put(PdfName.Type, new PdfName("3D"));
stream3D.put(PdfName.Subtype, new PdfName("U3D"));
stream3D.setCompressionLevel(CompressionConstants.DEFAULT_COMPRESSION);
stream3D.flush();
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));
Pdf3DAnnotation annot = new Pdf3DAnnotation(rect, stream3D);
annot.setContents(new PdfString("3D Model"));
annot.setDefaultInitialView(dict3D);
pdfDoc.addNewPage().addAnnotation(annot);
doc.close();
}
Or, if you want it in C# (haven't ran it locally, but visual studio is not complaining about syntax)
public void manipulatePdf(String dest) {
PdfDocument pdfDoc = new PdfDocument(new PdfWriter(dest));
Document doc = new Document(pdfDoc);
Rectangle rect = new Rectangle(100, 400, 400, 400);
PdfStream stream3D = new PdfStream(pdfDoc, new FileInputStream(RESOURCE));
stream3D.Put(PdfName.Type, new PdfName("3D"));
stream3D.Put(PdfName.Subtype, new PdfName("U3D"));
stream3D.SetCompressionLevel(CompressionConstants.DEFAULT_COMPRESSION);
stream3D.Flush();
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));
Pdf3DAnnotation annot = new Pdf3DAnnotation(rect, stream3D);
annot.SetContents(new PdfString("3D Model"));
annot.SetDefaultInitialView(dict3D);
pdfDoc.AddNewPage().AddAnnotation(annot);
doc.Close();
}
回答2:
The iText codebase for .net was designed to be an (almost) exact mirror of the java one.
Apart from code conventions (such as method names starting with an uppercase), you should be able to use java code in .net.
This also explains why we typically do not post the code for .net. I suggest you simply copy/paste the java code, change the method names to account for code-convention, and attempt to compile it.
If anything, it will give you a code-sample you can post here to make you post a bit more sensible.
回答3:
You can also try the below code in c# , which is using spirepdf
//Step 1: Initialize a new object of PdfDocuemnt, and add a blank page to the PDF document.
PdfDocument doc = new PdfDocument();
PdfPageBase page = doc.Pages.Add();
//Step 2: Draw a rectangle on the page to define the canvas area for the 3D file.
Rectangle rt = new Rectangle(0, 80, 200, 200);
//Step 3: Initialize a new object of Pdf3DAnnotation, load the.u3d file as 3D annotation.
Pdf3DAnnotation annotation = new Pdf3DAnnotation(rt, "E:\\Testingfolder\\u3dpdf\\BRO_JR_6910K Femur - Bone Model.stl");
annotation.Activation = new Pdf3DActivation();
annotation.Activation.ActivationMode = Pdf3DActivationMode.PageOpen;
//Step 4: Define a 3D view mode.
Pdf3DView View = new Pdf3DView();
View.Background = new Pdf3DBackground(new PdfRGBColor());
View.ViewNodeName = "test";
View.RenderMode = new Pdf3DRendermode(Pdf3DRenderStyle.Solid);
View.InternalName = "test";
View.LightingScheme = new Pdf3DLighting();
View.LightingScheme.Style = Pdf3DLightingStyle.Day;
//Step 5: Set the 3D view mode for the annotation.
annotation.Views.Add(View);
//Step 6: Add the annotation to PDF.
page.AnnotationsWidget.Add(annotation);
//Step 7: Save the file.
doc.SaveToFile("E:\\Testingfolder\\u3dpdf\\Create3DPdf.pdf", FileFormat.PDF);
回答4:
This is the working code to print a u3d file into pdf using c#
FileStream stream = new FileStream("E:\\Testingfolder\\u3dpdf\\DoctoPdf.pdf", FileMode.Open, FileAccess.Read);
String RESOURCE;
RESOURCE = "E:\\Testingfolder\\u3dpdf\\Testu3d.u3d";
iTextSharp.text.Rectangle rect;
using (iTextSharp.text.Document document = new iTextSharp.text.Document())
{
PdfWriter pdfwriter = PdfWriter.GetInstance(document, stream);
// step 3
document.Open();
// step 4
rect = new iTextSharp.text.Rectangle(100, 400, 500, 800);
rect.Border = iTextSharp.text.Rectangle.BOX;
rect.BorderWidth = 0.5f;
rect.BorderColor = new BaseColor(0xFF, 0x00, 0x00);
document.Add(rect);
document.SetMargins(129,259,647,1416);
PdfIndirectObject streamObject = null;
using (FileStream fs =
new FileStream(RESOURCE, FileMode.Open, FileAccess.Read))
{
PdfStream stream3D = new PdfStream(fs, pdfwriter);
stream3D.Put(PdfName.TYPE, new PdfName("3D"));
stream3D.Put(PdfName.SUBTYPE, new PdfName("U3D"));
stream3D.FlateCompress();
streamObject = pdfwriter.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 = pdfwriter.AddToBody(dict3D);
PdfAnnotation annot = new PdfAnnotation(pdfwriter, rect);
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.IndirectReference);
annot.Put(new PdfName("3DV"), dictObject.IndirectReference);
PdfAppearance ap = pdfwriter.DirectContent.CreateAppearance(
rect.Width, rect.Height
);
annot.SetAppearance(PdfAnnotation.APPEARANCE_NORMAL, ap);
annot.SetPage();
pdfwriter.AddAnnotation(annot);
}
回答5:
Have your problem got resolved? If not, you might be also interested in this alternative solution - embed 3D interactive graphics into PDF Document using Spire.PDF in C#.
PdfDocument doc = new PdfDocument();
PdfPageBase page = doc.Pages.Add();
Rectangle rt = new Rectangle(0, 80, 200, 200);
Pdf3DAnnotation annotation = new Pdf3DAnnotation(rt, "teapot.u3d");
annotation.Activation = new Pdf3DActivation();
annotation.Activation.ActivationMode = Pdf3DActivationMode.PageOpen;
Pdf3DView View= new Pdf3DView();
View.Background = new Pdf3DBackground(new PdfRGBColor(Color.Purple));
View.ViewNodeName = "test";
View.RenderMode = new Pdf3DRendermode(Pdf3DRenderStyle.Solid);
View.InternalName = "test";
View.LightingScheme = new Pdf3DLighting();
View.LightingScheme.Style = Pdf3DLightingStyle.Day;
annotation.Views.Add(View);
page.AnnotationsWidget.Add(annotation);
doc.SaveToFile("Create3DPdf.pdf", FileFormat.PDF);
来源：https://stackoverflow.com/questions/45059957/how-to-add-u3d-into-existing-pdf-using-itext7-with-c-sharp