ModifiedBSPTreeIntersectWithLine
VTKExamples/Cxx/DataStructures/ModifiedBSPTreeIntersectWithLine
Code¶
ModifiedBSPTreeIntersectWithLine.cxx
#include <vtkSmartPointer.h> #include <vtkPolyData.h> #include <vtkModifiedBSPTree.h> #include <vtkSphereSource.h> int main(int, char *[]) { vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->Update(); // Create the tree vtkSmartPointer<vtkModifiedBSPTree> bspTree = vtkSmartPointer<vtkModifiedBSPTree>::New(); bspTree->SetDataSet(sphereSource->GetOutput()); bspTree->BuildLocator(); // Inputs double p1[3] = {-2,0,0}; double p2[3] = {2,0,0}; double tolerance = .001; // Outputs double t; // Parametric coordinate of intersection (0 (corresponding to p1) to 1 (corresponding to p2)) double x[3]; // The coordinate of the intersection double pcoords[3]; int subId; // Note: for a typical use case (ray-triangle intersection), pcoords and subId will not be used vtkIdType iD = bspTree->IntersectWithLine(p1, p2, tolerance, t, x, pcoords, subId); std::cout << "iD: " << iD << std::endl; std::cout << "t: " << t << std::endl; std::cout << "x: " << x[0] << " " << x[1] << " " << x[2] << std::endl; return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(ModifiedBSPTreeIntersectWithLine) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ModifiedBSPTreeIntersectWithLine MACOSX_BUNDLE ModifiedBSPTreeIntersectWithLine.cxx) target_link_libraries(ModifiedBSPTreeIntersectWithLine ${VTK_LIBRARIES})
Download and Build ModifiedBSPTreeIntersectWithLine¶
Danger
The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.
Click here to download ModifiedBSPTreeIntersectWithLine and its CMakeLists.txt file. Once the tarball ModifiedBSPTreeIntersectWithLine.tar has been downloaded and extracted,
cd ModifiedBSPTreeIntersectWithLine/build
If VTK is installed:
cmake ..
If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:
cmake -DVTK_DIR:PATH=/home/me/vtk_build ..
Build the project:
make
and run it:
./ModifiedBSPTreeIntersectWithLine
WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.