//--------------------------------------------------------------------------------------------------
public PdfDomXObject(PdfDomDocument document, double[] boundingBox)
: base(document, "XObject")
{
Attributes["Subtype"] = "/Form";
Attributes["FormType"] = 1;
BoundingBox = boundingBox;
}
public PdfDomAnnotation(PdfDomDocument document, string subtype, double[] rect)
: base(document, "Annot")
{
Attributes["Subtype"] = "/" + subtype;
Debug.Assert(rect.Length == 4);
Attributes["Rect"] = rect.Select(v => v * PdfDomDocument.UserSpaceScale);
}
//--------------------------------------------------------------------------------------------------
public PdfDom3DAnnotation(PdfDomDocument document, double[] rect, PdfDomStream stream)
: base(document, "3D", rect)
{
document.Version = PdfVersion.PDF_1_6;
_Stream = stream;
Attributes["3DD"] = stream;
}
//--------------------------------------------------------------------------------------------------
public PdfDomStream(PdfDomDocument document, string type)
: base(document, type)
{
_TargetStream = new();
_Stream = _TargetStream;
if (PdfDomDocument.UseCompression)
{
// ZLib magic header, .Net don't write, but PDF expect them
// See https://www.ietf.org/rfc/rfc1950.txt
_TargetStream.WriteByte(0x78);
_TargetStream.WriteByte(0xDA);
_DeflateStream = new (_TargetStream, CompressionLevel.Fastest, true);
_Stream = _DeflateStream;
Attributes["Filter"] = "/FlateDecode";
}
}
//--------------------------------------------------------------------------------------------------
MemoryStream _Export(Drawing drawing)
{
_Document = new PdfDomDocument();
_Page = _Document.AddPage();
_Content = _Page.AddContent();
_ContentBuilder = new PdfContentBuilder();
var aabb = drawing.GetBoundingBox();
if (!aabb.IsVoid())
{
double xmin = 0, xmax = 0, ymin = 0, ymax = 0;
aabb.Get(ref xmin, ref ymin, ref xmax, ref ymax);
_Page.MediaBox = new[] { xmin, ymin, xmax, ymax };
}
// Export
drawing.Render(this);
var stream = _Document.WriteToStream();
_Document = null;
return(stream);
}
//--------------------------------------------------------------------------------------------------
public PdfDom3DBackground(PdfDomDocument document)
: base(document, "3DBG")
{
Attributes["Subtype"] = "/SC";
}
//--------------------------------------------------------------------------------------------------
public PdfDomFontDescriptor(PdfDomDocument document)
: base(document, "FontDescriptor")
{
_FontStream = new PdfDomStream(document, "");
}
//--------------------------------------------------------------------------------------------------
MemoryStream _Export(IEnumerable <Body> bodies)
{
try
{
var u3dSource = U3dBodyExporter.Export(bodies);
if (u3dSource == null)
{
Messages.Error("Mesh exporting failed, cannot generate 3D PDF.");
return(null);
}
_Document = new PdfDomDocument {
Version = PdfVersion.PDF_1_6
};
_Page = _Document.AddPage();
var pageRect = new[] { 0, 0, PaperSizeX, PaperSizeY };
_Page.MediaBox = pageRect;
// Create U3D stream
var streamObj = new PdfDom3DStream(_Document);
streamObj.Add(u3dSource);
// Create view
var view = streamObj.AddView("Default");
view.U3DPath = "View";
var projection = view.Projection;
projection.IsPerspective = false;
projection.AutomaticClipping = true;
var background = view.Background;
background.Color = new Color(0.75f, 0.75f, 0.75f);
if (CoreContext.Current?.Viewport != null)
{
var vp = CoreContext.Current.Viewport;
var size = vp.Size;
var scale = Math.Min(PaperSizeX / size.Width, PaperSizeY / size.Height);
projection.OrthographicScale = scale * PdfDomDocument.UserSpaceScale;
view.OrbitCenterDistance = vp.EyePoint.Distance(vp.TargetPoint) * vp.Scale;
}
// Create annotation
var normalAppearenceStream = new PdfDomXObject(_Document, pageRect);
normalAppearenceStream.Add(PdfSnippets.NormalAppearenceFor3DAnnot);
var annot = new PdfDom3DAnnotation(_Document, new[] { 0, 0, PaperSizeX, PaperSizeY }, streamObj)
{
IsInteractive = true,
IsAutostart = true,
NormalAppearence = normalAppearenceStream
};
_Page.Annotations.Add(annot);
// Finish
var stream = _Document.WriteToStream();
_Document = null;
return(stream);
}
catch (Exception e)
{
Messages.Exception($"Exception occured while exporting to U3D.", e);
return(null);
}
}
//--------------------------------------------------------------------------------------------------
public PdfDom3DStream(PdfDomDocument document)
: base(document, "3D")
{
Attributes["Subtype"] = "/U3D";
}
