普通文本标注

文本标注功能

vtkSmartPointer<vtkTextActor> NoteViewerItemInterface::createTextActor(const QString &text, Double3 position)
{
    auto data = text.toStdString();
    auto textActor = vtkSmartPointer<vtkTextActor>::New();
    textActor->SetInput(data.c_str());
    textActor->GetTextProperty()->SetFontSize(12);

    auto path = FileUtil::currentExeDir() + "/fonts/simhei.ttf";
    textActor->GetTextProperty()->SetFontFamily(VTK_FONT_FILE);
    textActor->GetTextProperty()->SetFontFile(path.toUtf8());
    textActor->GetTextProperty()->SetFontSize(NoteViewerConfig::instance()->getFontSize());

    textActor->SetPosition(position[0], position[1]);
    textActor->GetPositionCoordinate()->SetCoordinateSystemToWorld();
    textActor->GetPositionCoordinate()->SetValue(position[0], position[1], 0.001);
    return textActor;
}

void NoteViewerNotationItem::initActor()
{
    {
        auto source = vtkSmartPointer<vtkLineSource>::New();
        source->SetPoint1(m_center[0], m_center[1], 0.001);
        source->SetPoint2(m_position[0], m_position[1], 0.001);
        auto mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
        mapper->SetInputConnection(source->GetOutputPort());
        m_line = vtkSmartPointer<vtkActor>::New();
        m_line->SetMapper(mapper);
        m_line->GetProperty()->SetLineStipplePattern(0xFF00);
        m_line->GetProperty()->SetLineStippleRepeatFactor(1);
        m_viewer->getRenderer()->AddActor(m_line);
    }

    {
        m_textActor = createTextActor(m_tip, m_position);
        m_viewer->getRenderer()->AddActor(m_textActor);
    }
    m_viewer->updateRender();
}