我正在使用 iText7 (C#) 创建 pdf。我需要在 exising pdf 中添加一个 u3d 图片。我可以找到示例 (://developers.itextpdf/examples/itext-action-second-edition/chapter-16#619-pdf3d.java),但它是 java 一个。任何人都可以帮助给我一个关于.net C# 的例子吗?
3
链接的示例适用于 iText5，而不是 iText7。在 iText7 中，此示例如下所示
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();
}
或者，如果你想在 C ＃（没有在本地运行它，但 Visual Studio 不抱怨语法）
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();
}
0
.net 的 iText 代码库被设计为 Java 的（几乎）精确镜像。
除了代码约定（例如以大写开头的方法名称），您应该能够在.net 中使用 java 代码。
这也解释了为什么我们通常不发布.net 的代码。我建议你简单地复制 / 粘贴 java 代码，更改方法名称以考虑代码约定，并尝试编译它。
如果有的话，它会给你一个代码样本，你可以在这里发布，让你发布更明智。
0
您也可以尝试在 C ＃ 下面的 code，这是使用 spirepdf
/ / 步骤 1：初始化 PdfDocuemnt 的新对象，并在 PDF 文档中添加空白页。
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);
0
这是使用 c ＃ 将 u3d 文件打印为 pdf 的工作代码
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);
}
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