在Paraview中的3D体积上叠加线图

Question

我希望可视化一条线图（从线条过滤器沿着模型的“表面”的图表中提取）在其提取数据的线上。 Plot Over Line过滤器允许通过数据值和次要变换对线进行着色，但我想将Z位置设置为数据值的乘数。

这是基础知识的图像，它没有线的Z乘以数据值：

我导出了线图数据，将数据值（让它称之为幅度）转换为伪高程，并将结果导入为x，y，z点集（其中x，y为水平坐标，z =表示为高程坐标的幅度。

如何沿这些点绘制曲线？如果没有应用任何过滤器，它只是在空间中绘制为一系列点。

还有其他方法吗？我确信这很简单，但我无法看到它。

Answer 1

使用可编程python过滤器上的Paraview公共Wiki页面中提供的“How to connect points in paraview?”示例和问题Transform the input修改了vtk docs：

pdi = self.GetPolyDataInput()
pdo =  self.GetPolyDataOutput()
numPoints = pdi.GetNumberOfPoints()
pdo.Allocate()
for i in range(0, numPoints-1):
    points = [i, i+1]
    # VTK_LINE is 3
    pdo.InsertNextCell(3, 2, points)

或者，这是另一个将执行类似工作的脚本，从与前一个示例相同的页面上的几个其他示例进行修改：

# Get a vtk.PolyData object for the input
pdi = self.GetPolyDataInput()
# Get a vtk.PolyData object for the output
pdo = self.GetPolyDataOutput()

numPoints = pdi.GetNumberOfPoints()

# Points for the line:
newPoints = vtk.vtkPoints()
for i in range(0, numPoints):
    # Generate the new points from the input
    coord = pdi.GetPoint(i)
    x, y, z = coord[:3]
    newPoints.InsertPoint(i, x, y, z)

# Add the new points to the PolyData object:
pdo.SetPoints(newPoints)

# Make a line from the new points:
aPolyLine = vtk.vtkPolyLine()

#Indicate the number of points along the line
aPolyLine.GetPointIds().SetNumberOfIds(numPoints)
for i in range(0,numPoints):
   #Add the points to the line. The first value indicates
   #the order of the point on the line. The second value
   #is a reference to a point in a vtkPoints object. Depends
   #on the order that Points were added to vtkPoints object.
   #Note that this will not be associated with actual points
   #until it is added to a vtkPolyData object which holds a
   #vtkPoints object.
   aPolyLine.GetPointIds().SetId(i, i)

#Allocate the number of 'cells' that will be added. We are just
#adding one vtkPolyLine 'cell' to the vtkPolyData object.
pdo.Allocate(1, 1)

#Add the poly line 'cell' to the vtkPolyData object.
pdo.InsertNextCell(aPolyLine.GetCellType(), aPolyLine.GetPointIds())

两种解决方案都会生成这样的图像（在使用“属性”面板进行一些调整之后）：