通過字段名稱獲取vtkintarray的值

Question

我有一個用python編寫的Paraview programmable filter ，我在一個點表上運行以將RGB顏色分配為UnsignedCharArray 。 我只是停留在代碼的一部分中，以獲取范圍內的R，G，B字段的值。 這是表格示例：

這是示例代碼：

ids = self.GetInput()
ods = self.GetOutput()

ocolors = vtk.vtkUnsignedCharArray()
ocolors.SetName("colors")
ocolors.SetNumberOfComponents(3)
ocolors.SetNumberOfTuples(ids.GetNumberOfPoints())

inArray = ids.GetPointData().GetArray(0)
for x in range(0, ids.GetNumberOfPoints()):
  rF = inArray.GetValue(x) # here I need something like GetValue(x, "R")
  gF = inArray.GetValue(x) # here I need something like GetValue(x, "G")
  bF = inArray.GetValue(x) # here I need something like GetValue(x, "B")

  ocolors.SetTuple3(x, rF,gF,bF)

ods.GetPointData().AddArray(ocolors)

有誰知道我該如何處理？

Answer 1

所以這是正確的方法：

ids = self.GetInput()
ods = self.GetOutput()

ocolors = vtk.vtkUnsignedCharArray()
ocolors.SetName("colors")
ocolors.SetNumberOfComponents(3)
ocolors.SetNumberOfTuples(ids.GetNumberOfPoints())

inArray = ids.GetPointData().GetArray(0)

r = ids.GetPointData().GetArray("R")
g = ids.GetPointData().GetArray("G")
b = ids.GetPointData().GetArray("B")
for x in range(0, ids.GetNumberOfPoints()):
  rF = r.GetValue(x) 
  gF = g.GetValue(x) 
  bF = b.GetValue(x) 

  # if rgb are between 0-1
  #rC = rF*256
  #gC = gF*256
  #bC = bF*256

  ocolors.SetTuple3(x, rF,gF,bF)

ods.GetPointData().AddArray(ocolors)