vtk实战(八)—读取.raw文件

主要用到两个类

vtkparticlereader () vtkPolyDataMapper ()

vtkparticlereader( )用来读取二进制或文本文件，格式是:“，，”。该文本文件可以包含一个逗号分隔的值集。在大多数情况vtkparticlereader( )可以自动确定文件是否为文本或二进制。相对于二进制文件，支持随机存取文件的文件。
vtkpolydatamapper( )用来映射的多边形数据,使之到绘制图形到硬件/软件。

#include <vtkSmartPointer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkActor.h>
#include <vtkProperty.h>
#include <vtkParticleReader.h>
#include <vtkPolyDataMapper.h>


int main()
{

    std::string filePath = "Particles.raw";
    vtkSmartPointer<vtkParticleReader> reader =
        vtkSmartPointer<vtkParticleReader>::New();

    reader->SetFileName(filePath.c_str());
    reader->SetDataByteOrderToBigEndian();
    reader->Update();

    vtkSmartPointer<vtkPolyDataMapper> mapper =
        vtkSmartPointer<vtkPolyDataMapper>::New();
    mapper->SetInputConnection(reader->GetOutputPort());
    std::cout << "number of pieces: " << mapper->GetNumberOfPieces() << std::endl;
    mapper->SetScalarRange(4, 9);

    vtkSmartPointer<vtkActor> actor =
        vtkSmartPointer<vtkActor>::New();

    actor->SetMapper(mapper);
    actor->GetProperty()->SetPointSize(4);

    vtkSmartPointer<vtkRenderer> renderer =
        vtkSmartPointer<vtkRenderer>::New();
    vtkSmartPointer<vtkRenderWindow> renderWindow =
        vtkSmartPointer<vtkRenderWindow>::New();
    renderWindow->AddRenderer(renderer);
    vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
        vtkSmartPointer<vtkRenderWindowInteractor>::New();
    renderWindowInteractor->SetRenderWindow(renderWindow);

    renderer->AddActor(actor);
    renderer->SetBackground(.2, .3, .4);

    renderWindow->Render();
    renderWindowInteractor->Start();

    return 0;
}

程序源码：http://pan.baidu.com/s/1o8cSd1w