Qt+VTK多进程，VTK窗口进程嵌入主进程

效果

子窗口头文件ViewWidget3D.h

#pragma once

#include <QMainWindow>
#include <QVTKOpenGLNativeWidget.h>
#include <vtkActor.h>
#include <vtkCamera.h>
#include <vtkCylinderSource.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>

#include <array>

class ViewWidget3D : public QMainWindow
{
	Q_OBJECT

public:
	ViewWidget3D(QWidget*parent = nullptr);
	~ViewWidget3D();
	QVTKOpenGLNativeWidget* getWidget();
private:
	QVTKOpenGLNativeWidget* vtkWidget;
};

子窗口实现文件ViewWidget3D.cpp

#include "ViewWidget3D.h"
#include <QLabel>
ViewWidget3D::ViewWidget3D(QWidget*parent)
	: QMainWindow(parent)
{
	vtkWidget = new QVTKOpenGLNativeWidget();
	this->setCentralWidget(vtkWidget);
	vtkNew<vtkNamedColors> colors;

	// Set the background color.
	std::array<unsigned char, 4> bkg{ {26, 51, 102, 255} };
	colors->SetColor("BkgColor", bkg.data());

	// This creates a polygonal cylinder model with eight circumferential facets
	// (i.e, in practice an octagonal prism).
	vtkNew<vtkCylinderSource> cylinder;
	cylinder->SetResolution(8);

	// The mapper is responsible for pushing the geometry into the graphics
	// library. It may also do color mapping, if scalars or other attributes are
	// defined.
	vtkNew<vtkPolyDataMapper> cylinderMapper;
	cylinderMapper->SetInputConnection(cylinder->GetOutputPort());

	// The actor is a grouping mechanism: besides the geometry (mapper), it
	// also has a property, transformation matrix, and/or texture map.
	// Here we set its color and rotate it around the X and Y axes.
	vtkNew<vtkActor> cylinderActor;
	cylinderActor->SetMapper(cylinderMapper);
	cylinderActor->GetProperty()->SetColor(
		colors->GetColor4d("Tomato").GetData());
	cylinderActor->RotateX(30.0);
	cylinderActor->RotateY(-45.0);

	// The renderer generates the image
	// which is then displayed on the render window.
	// It can be thought of as a scene to which the actor is added
	vtkNew<vtkRenderer> renderer;
	renderer->AddActor(cylinderActor);
	renderer->SetBackground(colors->GetColor3d("BkgColor").GetData());
	// Zoom in a little by accessing the camera and invoking its "Zoom" method.
	renderer->ResetCamera();
	renderer->GetActiveCamera()->Zoom(1.5);

	vtkWidget->renderWindow()->AddRenderer(renderer);	
}

ViewWidget3D::~ViewWidget3D()
{
}

QVTKOpenGLNativeWidget* ViewWidget3D::getWidget()
{
	return vtkWidget;
}

子窗口启动文件main.cpp

#include "ViewWidget3D.h"
#include <QtWidgets/QApplication>
#include <QWindow>
#include <iostream>
int main(int argc, char* argv[])
{
	QApplication a(argc, argv);
	ViewWidget3D w;
	w.setWindowFlags(Qt::FramelessWindowHint);
	w.show();

	w.createWinId();
	// 输出
	std::cerr << w.winId() << std::endl;
	return a.exec();
}

参考正常嵌入

源代码示例