How to create a mesh data from vtkPoints?

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Thanks for your reply!

I already have tested with the vtkDelaunay2d sample code.
I modified the code as below, the stack overflow exception occurred. :cry:

My code:

int main(int, char*[])
{
	vtkNew<vtkNamedColors> colors;

	vtkNew<vtkPLYReader> reader;
	reader->SetFileName("test.ply");
	reader->Update();
	// Create a set of heights on a grid.
	// This is often called a "terrain map".
	vtkNew<vtkPoints> points;
	points->DeepCopy(reader->GetOutput()->GetPoints());

	// Add the grid points to a polydata object
	vtkNew<vtkPolyData> polydata;
	polydata->SetPoints(points);

	//... same as the sample code
}