1.对于在Mac下如何配置VTK，或者是qt下的.pro文件里面的引入包名，请参考我的上一篇博客Mac+CMake3.13.2+Qt5.12.0+VTK8.1.2 配置安装
2.读取stl文件
3.创建相应的顶点对象、立方体对象、单元数组对象
4.通过读取stl模型里面的单元，将单元的坐标索引赋值给一个二维数组
5.将stl模型里面的顶点坐标，存储到第3步定义的顶点对象里
6.将读取到的单元，赋值到第3步定义的单元数组对象里
7.设定每个顶点的标量值，用于颜色的查找
8.定义颜色表
9.数据的映射
。。。后面的就差不多是初始化并显示了
这里附上main.cpp的完整代码
#include "mainwindow.h"#include <QApplication>#include <vtkAutoInit.h>VTK_MODULE_INIT(vtkRenderingOpenGL2);VTK_MODULE_INIT(vtkInteractionStyle);VTK_MODULE_INIT(vtkRenderingFreeType);//#define vtkRenderingCore_AUTOINIT 4(vtkInteractionStyle,vtkRenderingFreeType,vtkRenderingFreeTypeOpenGL2,vtkRenderingOpenGL2)//#define vtkRenderingVolume_AUTOINIT 1(vtkRenderingVolumeOpenGL2)#include <QDebug>//调试用的#include <vtkVersion.h>#include <vtkPlaneSource.h>#include <vtkPolyData.h>#include <vtkSTLReader.h>#include <vtkSmartPointer.h>#include <vtkPolyDataMapper.h>#include <vtkActor.h>#include <vtkCamera.h>#include <vtkConeSource.h>#include <vtkCellArray.h>#include <vtkFloatArray.h>#include "vtkPointData.h"#include "vtkPoints.h"#include "vtkPolyData.h"#include "vtkPolyDataMapper.h"#include <vtkRenderWindow.h>#include <vtkRenderer.h>#include <vtkRenderWindowInteractor.h>#include <vtkLookupTable.h>using namespace std;int main(int, char *[]){std::string inputFilename="/Users/chentingxuan/Desktop/1.stl";//stl文件路径//读取stl文件vtkSmartPointer<vtkSTLReader> reader = vtkSmartPointer<vtkSTLReader>::New();reader->SetFileName(inputFilename.c_str());reader->Update();//创建mappervtkSmartPointer<vtkPolyDataMapper> mapper =vtkSmartPointer<vtkPolyDataMapper>::New();mapper->SetInputConnection(reader->GetOutputPort());//创建对象vtkPolyData *cube = vtkPolyData::New();//立方体vtkPoints *points = vtkPoints::New();//顶点坐标vtkCellArray *polys=vtkCellArray::New();//单元数组//存储标量值vtkFloatArray *scalars = vtkFloatArray::New();vtkPolyData *polydata=reader->GetOutput();//用于动态创建二维数组,用于存储顶点的索引vtkIdType (*y)[3] = new vtkIdType[polydata->GetNumberOfCells()][3];//读取细胞单元，并将坐标的索引赋值给二维数组yfor(int i =0;i<polydata->GetNumberOfCells();i++){//l1=polydata->GetCell(i)->GetPointIds();y[i][0]=polydata->GetCell(i)->GetPointIds()->GetId(0);y[i][1]=polydata->GetCell(i)->GetPointIds()->GetId(1);y[i][2]=polydata->GetCell(i)->GetPointIds()->GetId(2);}//存储顶点for(int i=0;i<polydata->GetNumberOfPoints();i++){double x[]={0,0,0};polydata->GetPoint(i,x);//获取顶点坐标points->InsertPoint(i,x);//将顶点坐标插入到vtkPoints定义的points}//设定单元for(int i=0;i<polydata->GetNumberOfCells();i++){polys->InsertNextCell(3,y[i]);}//存储每个顶点的标量值,也就是颜色的索引值，这里暂时是以顶点的先后顺序来设定的for(int i=0;i<polydata->GetNumberOfPoints();i++){scalars->InsertTuple1(i,i);}//创建多边形数据cube->SetPoints(points);//设定单元类型为多边形cube->SetPolys(polys);//设定每个顶点的标量值cube->GetPointData()->SetScalars(scalars);points->Delete();polys->Delete();scalars->Delete();//定义颜色映射表vtkLookupTable *pColorTable = vtkLookupTable::New();//设置颜色表中的颜色，下列两种方式都可以/*pColorTable->SetNumberOfColors(4);pColorTable->SetTableValue(0,1.0,0.0,0.0,1.0);pColorTable->SetTableValue(0,1.0,0.0,0.0,1.0);pColorTable->SetTableValue(1,0.0,1.0,0.0,1.0);pColorTable->SetTableValue(2,1.0,1.0,0.0,1.0);pColorTable->SetTableValue(3,0.0,0.0,1.0,1.0);*///设置颜色表中的颜色pColorTable->SetNumberOfColors(256);pColorTable->SetHueRange(0.67, 0.0); //色调范围从红色到蓝色pColorTable->Build();//数据映射vtkPolyDataMapper *cubeMapper = vtkPolyDataMapper::New();cubeMapper->SetInputData(cube);cubeMapper->SetScalarRange(0,polydata->GetNumberOfPoints()-1);cubeMapper->SetLookupTable(pColorTable);vtkActor *cubeActor = vtkActor::New();cubeActor->SetMapper(cubeMapper);qDebug()<<"admin"<<polydata->GetNumberOfPoints();// Create a renderer(渲染器), render window and interactor(渲染窗口)vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New();renderWindow->AddRenderer(renderer);renderWindow->SetSize(1300,1300);//设置窗口大小vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New();renderWindowInteractor->SetRenderWindow(renderWindow);// Add the actors to the scenerenderer->AddActor(cubeActor);renderer->SetBackground(.1,.2,.3); // Background color dark blue// Render and interactrenderWindow->Render();renderWindowInteractor->Start();return EXIT_SUCCESS;}
运行结果如下：
