vtk实战(五十四)—对直线设置颜色

#include <vtkVersion.h>#include <vtkSmartPointer.h>#include <vtkCellArray.h>#include <vtkCellData.h>#include <vtkUnsignedCharArray.h>#include <vtkPoints.h>#include <vtkLine.h>#include <vtkPolyData.h>#include <vtkPolyDataMapper.h>#include <vtkActor.h>#include <vtkRenderWindow.h>#include <vtkRenderer.h>#include <vtkRenderWindowInteractor.h>int main(){    vtkSmartPointer<vtkPolyData> linesPolyData =        vtkSmartPointer<vtkPolyData>::New();    double origin[3] = { 0.0, 0.0, 0.0 };    double p0[3] = { 1.0, 0.0, 0.0 };    double p1[3] = { 0.0, 1.0, 0.0 };    vtkSmartPointer<vtkPoints> pts =        vtkSmartPointer<vtkPoints>::New();    pts->InsertNextPoint(origin);    pts->InsertNextPoint(p0);    pts->InsertNextPoint(p1);    linesPolyData->SetPoints(pts);    vtkSmartPointer<vtkLine> line0 =        vtkSmartPointer<vtkLine>::New();    line0->GetPointIds()->SetId(0, 0); // 第二个0表示pts中的origin点    line0->GetPointIds()->SetId(1, 1); //第二个1表示pts中的p0点    vtkSmartPointer<vtkLine> line1 =        vtkSmartPointer<vtkLine>::New();    line1->GetPointIds()->SetId(0, 0);     line1->GetPointIds()->SetId(1, 2);    vtkSmartPointer<vtkCellArray> lines =        vtkSmartPointer<vtkCellArray>::New();    lines->InsertNextCell(line0);    lines->InsertNextCell(line1);    linesPolyData->SetLines(lines);    unsigned char red[3] = { 255, 0, 0 };    unsigned char green[3] = { 0, 255, 0 };    vtkSmartPointer<vtkUnsignedCharArray> colors =        vtkSmartPointer<vtkUnsignedCharArray>::New();    colors->SetNumberOfComponents(3);    colors->InsertNextTupleValue(red);    colors->InsertNextTupleValue(green);    linesPolyData->GetCellData()->SetScalars(colors);    vtkSmartPointer<vtkPolyDataMapper> mapper =        vtkSmartPointer<vtkPolyDataMapper>::New();    mapper->SetInput(linesPolyData);    vtkSmartPointer<vtkActor> actor =        vtkSmartPointer<vtkActor>::New();    actor->SetMapper(mapper);    vtkSmartPointer<vtkRenderer> renderer =        vtkSmartPointer<vtkRenderer>::New();    renderer->AddActor(actor);    vtkSmartPointer<vtkRenderWindow> window =        vtkSmartPointer<vtkRenderWindow>::New();    window->AddRenderer(renderer);    vtkSmartPointer<vtkRenderWindowInteractor> interactor =        vtkSmartPointer<vtkRenderWindowInteractor>::New();    interactor->SetRenderWindow(window);    window->Render();    interactor->Start();    return 0;}