$tr3d->PushBackNumber(-1);
$tr3d->PushBackNumber(0);
$tr3d->PushBackNumber(1);
$tr3d->PushBackNumber(0);
$tr3d->PushBackNumber(0);
$tr3d->PushBackNumber(-27.5);
$tr3d->PushBackNumber(0);
// Create annotation appearance stream, a thumbnail which is used during printing or
// in PDF processors that do not understand 3D data.
$ap_dict = $link_3D->PutDict("AP");
$builder = new ElementBuilder();
$writer = new ElementWriter();
$writer->Begin($doc->GetSDFDoc());
$thumb_pathname = $input_path . "dice.jpg";
$image = Image::Create($doc->GetSDFDoc(), $thumb_pathname);
$writer->WritePlacedElement($builder->CreateImage($image, 0.0, 0.0, $link_3D_rect->Width(), $link_3D_rect->Height()));
$normal_ap_stream = $writer->End();
$normal_ap_stream->PutName("Subtype", "Form");
$normal_ap_stream->PutRect("BBox", 0, 0, $link_3D_rect->Width(), $link_3D_rect->Height());
$ap_dict->Put("N", $normal_ap_stream);
}
// ---------------------------------------------------------------------------------
PDFNet::Initialize();
$doc = new PDFDoc();
$page = $doc->PageCreate();
$doc->PagePushBack($page);
$annots = $doc->CreateIndirectArray();
$page->GetSDFObj()->Put("Annots", $annots);
Create3DAnnotation($doc, $annots);
$doc->Save($output_path . "dice_u3d.pdf", SDFDoc::e_linearized);
echo "Done.\n";
