请介绍一下MDM和SAP

以下是一个简单的示例程序，演示了如何使用C++和Qt结合VTK库绘制二维的矢量箭头：

#include <vtkSmartPointer.h>
#include <vtkArrowSource.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor2D.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkVectorText.h>
#include <vtkTextProperty.h>
#include <vtkTextMapper.h>
#include <vtkTransform.h>
#include <vtkTransformPolyDataFilter.h>

#include <QApplication>
#include <QWidget>
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QLabel>
#include <QPushButton>

int main(int argc, char** argv)
{
    QApplication app(argc, argv);

    // Create a VTK renderer and window
    vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
    vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New();
    renderWindow->AddRenderer(renderer);

    // Create a Qt widget to hold the VTK window
    QWidget* widget = new QWidget;
    QHBoxLayout* layout = new QHBoxLayout(widget);
    layout->setContentsMargins(0, 0, 0, 0);
    layout->addWidget(new QLabel("VTK Window"));
    layout->addWidget(new QPushButton("Close", widget));
    layout->addWidget(renderWindow->GetInteractor()->GetRenderWindow()->GetQVTKWidget());

    // Create a VTK arrow source and mapper
    vtkSmartPointer<vtkArrowSource> arrowSource = vtkSmartPointer<vtkArrowSource>::New();
    arrowSource->SetShaftRadius(0.02);
    arrowSource->SetTipLength(0.1);
    vtkSmartPointer<vtkPolyDataMapper> arrowMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
    arrowMapper->SetInputConnection(arrowSource->GetOutputPort());

    // Create a VTK actor for the arrow
    vtkSmartPointer<vtkActor2D> arrowActor = vtkSmartPointer<vtkActor2D>::New();
    arrowActor->SetMapper(arrowMapper);
    renderer->AddActor2D(arrowActor);

    // Create a VTK text source and mapper
    vtkSmartPointer<vtkVectorText> textSource = vtkSmartPointer<vtkVectorText>::New();
    textSource->SetText("Arrow");
    vtkSmartPointer<vtkTextMapper> textMapper = vtkSmartPointer<vtkTextMapper>::New();
    textMapper->SetInputConnection(textSource->GetOutputPort());
    textMapper->GetTextProperty()->SetFontFamilyToArial();
    textMapper->GetTextProperty()->SetFontSize(18);

    // Create a VTK actor for the text
    vtkSmartPointer<vtkActor2D> textActor = vtkSmartPointer<vtkActor2D>::New();
    textActor->SetMapper(textMapper);
    renderer->AddActor2D(textActor);

    // Set the position and orientation of the arrow and text
    vtkSmartPointer<vtkTransform> transform = vtkSmartPointer<vtkTransform>::New();
    transform->Translate(0.5, 0.5, 0.0);
    transform->RotateZ(45.0);
    vtkSmartPointer<vtkTransformPolyDataFilter> transformFilter = vtkSmartPointer<vtkTransformPolyDataFilter>::New();
    transformFilter->SetTransform(transform);
    transformFilter->SetInputConnection(arrowSource->GetOutputPort());
    arrowMapper->SetInputConnection(transformFilter->GetOutputPort());
    transformFilter->SetInputConnection(textSource->GetOutputPort());
    textMapper->SetInputConnection(transformFilter->GetOutputPort());
    arrowActor->SetPosition(0.0, 0.0);
    textActor->SetPosition(-0.1, -0.1);

    // Initialize the VTK interactor and start the event loop
    renderWindow->GetInteractor()->Initialize();
    widget->show();
    app.exec();

    return 0;
}

该程序的主要步骤如下：

1. 创建VTK渲染器和窗口对象；
2. 创建Qt窗口对象，并将VTK窗口对象添加到Qt布局中；
3. 创建VTK箭头源和映射器对象；
4. 创建VTK箭头演员对象，并将其添加到渲染器中；
5. 创建VTK文本源和映射器对象；
6. 创建VTK文本演员对象，并将其添加到渲染器中；
7. 设置箭头和文本的位置和方向，并将它们添加到变换滤波器中；
8. 初始化VTK交互器并启动事件循环。

运行该程序，您应该会看到一个带有箭头和文本的VTK窗口，如下图所示：


注意：在使用VTK库时，请确保正确配置了VTK的头文件和库文件路径，并将必要的VTK库添加到项目中。此外，还需要安装Qt和VTK的相应版本，并在项目中包含Qt和VTK的头文件。