目的
本介绍如何显示VTK库中自带一些模型。
新建空白工程，添加QWidget控件并提升为QVTKOpenGLNativeWidget。
pro
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| INCLUDEPATH += /usr/include/vtk-9.1
LIBS += -lvtkGUISupportQt-9.1 -lvtksys-9.1 -lvtkInteractionStyle-9.1 \
-lvtkRenderingOpenGL2-9.1 -lvtkRenderingCore-9.1 -lvtkCommonExecutionModel-9.1 \
-lvtkCommonCore-9.1 -lvtkIOGeometry-9.1 -lvtkIOImage-9.1 -lvtkRenderingImage-9.1 \
-lvtkViewsCore-9.1 -lvtkImagingCore-9.1 -lvtkInteractionImage-9.1 -lvtkFiltersSources-9.1 \
-lvtkCommonColor-9.1
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头文件
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| #include <vtkAutoInit.h>
#include <vtkBMPReader.h>
#include <vtkFloatArray.h>
#include <vtkGenericOpenGLRenderWindow.h>
#include <vtkImageActor.h>
#include <vtkImageChangeInformation.h>
#include <vtkImageData.h>
#include <vtkImageImport.h>
#include <vtkImageViewer2.h>
#include <vtkInteractorStyleImage.h>
#include <vtkJPEGReader.h>
#include <vtkLookupTable.h>
#include <vtkMetaImageReader.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPointData.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkSTLReader.h>
#include <vtkSmartPointer.h>
#include <vtkXMLImageDataWriter.h>
#include <vtkEventQtSlotConnect.h>
#include <vtkImageBlend.h>
#include <vtkImageCanvasSource2D.h>
#include <vtkImageIterator.h>
#include <vtkImageLuminance.h>
#include <vtkImageStencil.h>
#include <vtkImageStencilData.h>
#include <vtkImageViewer.h>
#include <vtkPNGReader.h>
#include <vtkSphereSource.h>
VTK_MODULE_INIT(vtkRenderingOpenGL2)
VTK_MODULE_INIT(vtkInteractionStyle)
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像素
在构造函数中添加
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| QSurfaceFormat::setDefaultFormat(QVTKOpenGLNativeWidget::defaultFormat());
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设置界面渲染的精度。
读取
从官方接口读取模型数据
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| vtkNew<vtkSphereSource> sphereSource;
sphereSource->GetOutputPort();
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注意这里的new方式。
mapper
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| vtkNew<vtkPolyDataMapper> sphereMapper;
sphereMapper->SetInputConnection(sphereSource->GetOutputPort());
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actor
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| vtkNew<vtkActor> sphereActor;
vtkNew<vtkNamedColors> colors;
sphereActor->SetMapper(sphereMapper);
sphereActor->GetProperty()->SetColor(colors->GetColor4d("Tomato").GetData());
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renderer
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| vtkNew<vtkRenderer> renderer;
renderer->AddActor(sphereActor);
renderer->SetBackground(colors->GetColor3d("SteelBlue").GetData());
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window
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| vtkNew<vtkGenericOpenGLRenderWindow> renderWindow;
renderWindow->AddRenderer(renderer);
renderWindow->SetWindowName("RenderWindowNoUIFile");
ui->widget->setRenderWindow(renderWindow);
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效果
编译运行程序
说明
要想在窗口显示(window)，需要设置渲染器(renderer)，渲染器需要输入(actor)，输入需要数据(mapper)，数据要先读取(reader)。
流程为
flowchart TB
A[reader] --> B[mapper]
B --> C[actor]
C --> D[renderer]
D --> E[window]
