如何将下面的C++代码转换为Python

Question

大家好。我正在尝试用python学习VTK。现在我遇到了一个问题。我无法将下面的案例转换为python代码，而且我不知道这些参数代表什么。我得到的是多边形对象，下面的代码用于确定给定点是否在我绘制的多边形范围内。源链接enter link description here，我无法转换的原因是它位于polygon->ComputeNormal(polygon->GetPoints()->GetNumberOfPoints(), static_cast<double*>(polygon->GetPoints()->GetData()->GetVoidPointer(0)), n);中，我使用python获取多边形->；GetPoints（）->；GetData（）->；GetVoidPointer（0））以获取无

#include <vtkSmartPointer.h>
#include <vtkPoints.h>
#include <vtkPolygon.h>

int main(int, char *[])
{
  // Create the polygon
  vtkSmartPointer<vtkPolygon> polygon =
    vtkSmartPointer<vtkPolygon>::New();
  polygon->GetPoints()->InsertNextPoint(0.0, 0.0, 0.0);
  polygon->GetPoints()->InsertNextPoint(1.0, 0.0, 0.0);
  polygon->GetPoints()->InsertNextPoint(1.0, 1.0, 0.0);
  polygon->GetPoints()->InsertNextPoint(0.0, 1.0, 0.0);

  double testIn[3] = {0.5, 0.5, 0.0};
  double testOut[3] = {2.0, 0.5, 0.0};

  double n[3];
  polygon->ComputeNormal(polygon->GetPoints()->GetNumberOfPoints(),
          static_cast<double*>(polygon->GetPoints()->GetData()->GetVoidPointer(0)), n);

  double bounds[6];
  polygon->GetPoints()->GetBounds(bounds);

  std::cout << "testIn in polygon? " << polygon->PointInPolygon(testIn,
      polygon->GetPoints()->GetNumberOfPoints(), static_cast<double*>(
      polygon->GetPoints()->GetData()->GetVoidPointer(0)), bounds, n) << std::endl;

  std::cout << "testOut in polygon? " << polygon->PointInPolygon(testOut,
      polygon->GetPoints()->GetNumberOfPoints(), static_cast<double*>(
      polygon->GetPoints()->GetData()->GetVoidPointer(0)), bounds, n) << std::endl;

  /*
  std::cout << "New functions:" << std::endl;

  std::cout << "testIn in polygon? " << polygon->PointInPolygon(testIn) << std::endl;

  std::cout << "testOut in polygon? " << polygon->PointInPolygon(testOut) << std::endl;
  */
  return EXIT_SUCCESS;
}

  /**
   * Determine whether point is inside polygon. Function uses ray-casting
   * to determine if point is inside polygon. Works for arbitrary polygon shape
   * (e.g., non-convex). Returns 0 if point is not in polygon; 1 if it is.
   * Can also return -1 to indicate degenerate polygon.
   */
  static int PointInPolygon(double x[3], int numPts, double *pts,
                            double bounds[6], double n[3]);