使用vtk.vtkUnsignedCharArray动态重新渲染改变ploydata颜色

Question

我有以下代码，其目的是能够根据我们从QColorDialog获得的数据动态更改线条颜色。如果我直接将颜色应用于vtkActor并重新渲染窗口，那么它就可以正常工作了。 但最终我希望能够更改单个行的点颜色，这就是为什么我在self.linesPolyData.GetCellData().SetScalars(self.colors)函数QPushButton中使用def select_color(self):更改颜色时设置from Analysis.Channel import * import vtk import numpy as np import itertools import sys import math from PyQt5 import QtGui, QtCore from PyQt5.QtWidgets import QApplication, QWidget, QGridLayout, QScrollArea, QPushButton, QColorDialog from vtk.qt.QVTKRenderWindowInteractor import QVTKRenderWindowInteractor # Qt Class which will render the objects class MainWindow(QWidget): def __init__(self, parent = None): super().__init__() self.layout = QGridLayout(self) self.color_button = QPushButton('Select Color') self.layout.addWidget(self.color_button) self.color_button.clicked.connect(self.select_color) self.color = [255, 255, 0, 255] self.colors = vtk.vtkUnsignedCharArray() self.colors.SetNumberOfComponents(4) # Create the polydata where we will store all the geometric data self.linesPolyData = vtk.vtkPolyData() # Create three points origin = [0.0, 0.0, 0.0] p0 = [1.0, 0.0, 0.0] p1 = [0.0, 1.0, 0.0] # Create a vtkPoints container and store the points in it pts = vtk.vtkPoints() pts.InsertNextPoint(origin) pts.InsertNextPoint(p0) pts.InsertNextPoint(p1) self.linesPolyData.SetPoints(pts) # Create the first line (between Origin and P0) line0 = vtk.vtkLine() line0.GetPointIds().SetId(0, 0) # the second 0 is the index of the Origin in linesPolyData's points line0.GetPointIds().SetId(1, 1) # the second 1 is the index of P0 in linesPolyData's points # Create the second line (between Origin and P1) line1 = vtk.vtkLine() line1.GetPointIds().SetId(0, 0) # the second 0 is the index of the Origin in linesPolyData's points line1.GetPointIds().SetId(1, 2) # 2 is the index of P1 in linesPolyData's points self.lines = vtk.vtkCellArray() self.lines.InsertNextCell(line0) self.lines.InsertNextCell(line1) # Add the lines to the polydata container self.linesPolyData.SetLines(self.lines) for i in range(0, self.lines.GetNumberOfCells()): self.colors.InsertNextTuple(self.color) self.linesPolyData.GetCellData().SetScalars(self.colors) self.mapper = vtk.vtkPolyDataMapper() self.mapper.SetInputData(self.linesPolyData) self.actor = vtk.vtkActor() self.actor.SetMapper(self.mapper) self.actor.GetProperty().SetLineWidth(4) self.vtk_widget = QVTKRenderWindowInteractor() # vtk_widget.setMinimumSize(round(1024/3), round(1024/3)) ren = vtk.vtkRenderer() self.vtk_widget.GetRenderWindow().AddRenderer(ren) ren.AddActor(self.actor) ren.ResetCamera() interactor = self.vtk_widget.GetRenderWindow().GetInteractor() interactor.Initialize() interactor.Start() self.layout.addWidget(self.vtk_widget) def select_color(self): color = QColorDialog.getColor(QtCore.Qt.green, self) if color.isValid(): self.color = color.getRgb() for i in range(0, self.lines.GetNumberOfCells()): self.colors.InsertNextTuple(self.color) self.linesPolyData.GetCellData().SetScalars(self.colors) self.mapper.SetInputData(self.linesPolyData) self.linesPolyData.Modified() self.mapper.Modified() # self.actor.GetProperty().Modified() self.vtk_widget.Render() if __name__ == '__main__': app = QApplication(sys.argv) win = MainWindow() win.show() sys.exit(app.exec_()) 它不会重新用新颜色渲染线条。我做错了什么？

var msftDataTable = anychart.data.table();
msftDataTable.addData(window.get_msft_daily_short_data());
var chart = anychart.stock();
var firstPlot = chart.plot(0);
firstPlot.area(msftDataTable.mapAs({'value': 4})).name('MSFT');

ReactDOM.render(
  <AnyChart
    width={800}
    height={800}
    instance={chart}
    title="Stock demo"
  />, document.getElementById('root'));