vtk加载rgb点云ply文件和灰白ply文件

2023-10-31

vkt官方的例子是加载灰白的ply文件，但是当项目中用到rgb的ply文件就是显示不出来图像，具体的加载方法如下：

vtk加载RGB点云文件

#include “vtkAutoInit.h”
VTK_MODULE_INIT(vtkRenderingOpenGL2);
VTK_MODULE_INIT(vtkRenderingFreeType);
VTK_MODULE_INIT(vtkInteractionStyle)

#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>
#include <vtkPLYReader.h>
#include
#include <vtkPolyData.h>
#include <vtkCellData.h>
#include <vtkVertexGlyphFilter.h>

int main()
{
std::string filename = “C:\Users\admin\Desktop\work\RGBPoints.ply”;
vtkSmartPointer reader =
vtkSmartPointer::New();
reader->SetFileName(filename.c_str());
reader->Update();

vtkSmartPointer<vtkPolyData> pPolyData = vtkSmartPointer<vtkPolyData>::New();
pPolyData->DeepCopy(reader->GetOutput());
vtkSmartPointer<vtkVertexGlyphFilter> pFilter = vtkSmartPointer<vtkVertexGlyphFilter>::New();
pFilter->AddInputData(pPolyData);
pFilter->Update();


vtkSmartPointer<vtkPolyDataMapper> mapper =
	vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputConnection(pFilter->GetOutputPort());

vtkSmartPointer<vtkActor> actor =
	vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);

vtkSmartPointer<vtkRenderer> renderer =
	vtkSmartPointer<vtkRenderer>::New();
renderer->AddActor(actor);
renderer->SetBackground(.3, .6, .3);

vtkSmartPointer<vtkRenderWindow> renderWindow =
	vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);

vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
	vtkSmartPointer<vtkRenderWindowInteractor>::New();
renderWindowInteractor->SetRenderWindow(renderWindow);
renderWindow->Render();
renderWindowInteractor->Start();

return 0;

}

vtk加载灰度点云文件ply

#include “vtkAutoInit.h”
VTK_MODULE_INIT(vtkRenderingOpenGL2);
VTK_MODULE_INIT(vtkRenderingFreeType);
VTK_MODULE_INIT(vtkInteractionStyle)

int main()
{
std::string filename = “C:\Users\admin\Desktop\work\RGBPoints.ply”;
vtkSmartPointer reader =
vtkSmartPointer::New();
reader->SetFileName(filename.c_str());
reader->Update();

vtkSmartPointer<vtkPolyDataMapper> mapper =
	vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputConnection(reader->GetOutputPort());

vtkSmartPointer<vtkActor> actor =
	vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);

vtkSmartPointer<vtkRenderer> renderer =
	vtkSmartPointer<vtkRenderer>::New();
renderer->AddActor(actor);
renderer->SetBackground(.3, .6, .3);

vtkSmartPointer<vtkRenderWindow> renderWindow =
	vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);

vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
	vtkSmartPointer<vtkRenderWindowInteractor>::New();
renderWindowInteractor->SetRenderWindow(renderWindow);
renderWindow->Render();
renderWindowInteractor->Start();

return 0;

}

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