目的
使用VTK加载STL格式模型
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
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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 <vtkImageBlend.h>
#include <vtkImageCanvasSource2D.h>
#include <vtkImageIterator.h>
#include <vtkImageLuminance.h>
#include <vtkImageStencil.h>
#include <vtkImageStencilData.h>
#include <vtkImageViewer.h>
#include <vtkPNGReader.h>
VTK_MODULE_INIT(vtkRenderingOpenGL2)
VTK_MODULE_INIT(vtkInteractionStyle)
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读取
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| QString selectFilePath = "Gear_with_50_teeths.stl";
vtkSmartPointer<vtkSTLReader> reader = vtkSmartPointer<vtkSTLReader>::New();
reader->SetFileName(selectFilePath.toStdString().c_str());
reader->Update();
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转换
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vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputConnection(reader->GetOutputPort());
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加载
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vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);
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渲染
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| vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
renderer->AddActor(actor);
renderer->SetBackground(.0, .0, .0);
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显示
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| vtkSmartPointer<vtkGenericOpenGLRenderWindow> window = vtkSmartPointer<vtkGenericOpenGLRenderWindow>::New();
ui->widget->setRenderWindow(window);
ui->widget->renderWindow()->AddRenderer(renderer);
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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)。可以看到流程上和上一篇一样。
流程为
flowchart TB
A[reader] --> B[mapper]
B --> C[actor]
C --> D[renderer]
D --> E[window]
