Qt 如何使用VTK显示点云

开发环境

        ubuntu 20.04

        VTK 8.2

编译VTK

下载源码

        git clone --recursive https://gitlab.kitware.com/vtk/vtk.git

        使用版本管理工具，切换版本到8.2

更改编译选项，这里使用cmake-gui进行配置

1、编译类型修改为Release

2、安装路径可以设置，也可以不设置，不设置默认安装到/usr/local目录下

3、勾选VTK_Group_Qt

4、勾选Module_vtkGUISupportQtOpenGL

生成成功后，执行编译

cmake ..

make -j4

make install

 开发

CMakeLists 

find_package(VTK 8.2 COMPONENTS  vtkGUISupportQt
vtkGUISupportQtOpenGL
vtkRenderingGL2PSOpenGL2
vtkRenderingVolumeOpenGL2 REQUIRED)

complice_module(${PROJECT_NAME})


target_link_libraries( ${PROJECT_NAME} PRIVATE  ${VTK_LIBRARIES}  

.h

#include <QVTKOpenGLNativeWidget.h>
#include <pcl/visualization/pcl_visualizer.h>
#include <vtkGenericOpenGLRenderWindow.h>
#include <vtkOrientationMarkerWidget.h>

class  CloudView : public QVTKOpenGLNativeWidget
{
	Q_OBJECT
public:
	explicit CloudView(QWidget* parent = nullptr);
private:
	pcl::visualization::PCLVisualizer::Ptr m_viewer;
	vtkSmartPointer<vtkRenderer> m_render;
	vtkSmartPointer<vtkGenericOpenGLRenderWindow> m_renderwindow;
	vtkSmartPointer<vtkOrientationMarkerWidget> m_axes;
};

.cpp

#include "cloudview.h"
#include <vtkAutoInit.h>
VTK_MODULE_INIT(vtkRenderingOpenGL2)
VTK_MODULE_INIT(vtkInteractionStyle)
VTK_MODULE_INIT(vtkRenderingVolumeOpenGL2)
VTK_MODULE_INIT(vtkRenderingFreeType)

#include <vtkAxesActor.h>

CloudView::CloudView(QWidget* parent)
	: QVTKOpenGLNativeWidget(parent),
	m_render(vtkSmartPointer<vtkRenderer>::New()),
	m_renderwindow(vtkSmartPointer<vtkGenericOpenGLRenderWindow>::New()),
	m_axes(vtkSmartPointer<vtkOrientationMarkerWidget>::New())
{
	m_renderwindow->AddRenderer(m_render);
	m_viewer.reset(new pcl::visualization::PCLVisualizer(m_render, m_renderwindow, "viewer", false));
   
	m_viewer->setupInteractor(this->GetInteractor(), this->GetRenderWindow());
	this->SetRenderWindow(m_viewer->getRenderWindow());
	m_viewer->setBackgroundColor((double)150.0 / 255.0, (double)150.0 / 255.0, (double)150.0 / 255.0);
	vtkSmartPointer<vtkAxesActor> actor = vtkSmartPointer<vtkAxesActor>::New();
	m_axes->SetOutlineColor(0.9300, 0.5700, 0.1300);
	m_axes->SetOrientationMarker(actor);
	m_axes->SetInteractor(m_viewer->getRenderWindow()->GetInteractor());
	m_axes->SetViewport(0.9, 0, 1, 0.15);
	m_axes->SetEnabled(true);
	m_axes->InteractiveOn();
	m_axes->InteractiveOff();
	m_viewer->getRenderWindow()->Render();
}

void CloudView::addPointCloud(const Cloud::Ptr& cloud)
{
	if (!m_viewer->contains(cloud->id().toStdString()))
		m_viewer->addPointCloud<PointXYZRGBN>(cloud, cloud->id().toStdString());
	else
	{
		pcl::visualization::PointCloudColorHandlerRGBField<PointXYZRGBN> rgb(cloud);
		m_viewer->updatePointCloud<PointXYZRGBN>(cloud, rgb, cloud->id().toStdString());
	}
	if (cloud->pointSize() != 1)
		m_viewer->setPointCloudRenderingProperties(pcl::visualization::PCL_VISUALIZER_POINT_SIZE,
												   cloud->pointSize(), cloud->id().toStdString());
	if (cloud->opacity() != 1)
		m_viewer->setPointCloudRenderingProperties(pcl::visualization::PCL_VISUALIZER_OPACITY,
												   cloud->opacity(), cloud->id().toStdString());
	m_viewer->getRenderWindow()->Render();
}

ui上拖拽一个openGl控件， 然后提升为CloudView，然后就可以显示点云数据了

PointCloud::Ptr pointPtr；

ui->cloudview->addPointCloud( cloud);
ui->cloudview->resetCamera();

显示效果