DistancePointToLine
VTKExamples/Cxx/SimpleOperations/DistancePointToLine
Description¶
This example computes the distance from a point to a line.
Code¶
DistancePointToLine.cxx
#include <vtkSmartPointer.h> #include <vtkLine.h> #include <vtkPoints.h> int main(int, char *[]) { double lineP0[3] = {0.0, 0.0, 0.0}; double lineP1[3] = {2.0, 0.0, 0.0}; double p0[3] = {1.0, 0, 0}; double p1[3] = {1.0, 2.0, 0}; /* vtkSmartPointer<vtkLine> line = vtkSmartPointer<vtkLine>::New(); line->GetPoints()->SetPoint(0, lineP0); line->GetPoints()->SetPoint(0, lineP1); */ { double dist0 = vtkLine::DistanceToLine(p0, lineP0, lineP1); std::cout << "Dist0: " << dist0 << std::endl; double dist1 = vtkLine::DistanceToLine(p1, lineP0, lineP1); std::cout << "Dist1: " << dist1 << std::endl; } { double t; double closest[3]; double dist0 = vtkLine::DistanceToLine(p0, lineP0, lineP1, t, closest); std::cout << "Dist0: " << dist0 << " closest point: " << closest[0] << " " << closest[1] << " " << closest[2] << std::endl; double dist1 = vtkLine::DistanceToLine(p1, lineP0, lineP1, t, closest); std::cout << "Dist1: " << dist1 << " closest point: " << closest[0] << " " << closest[1] << " " << closest[2] << std::endl; } return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(DistancePointToLine) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(DistancePointToLine MACOSX_BUNDLE DistancePointToLine.cxx) target_link_libraries(DistancePointToLine ${VTK_LIBRARIES})
Download and Build DistancePointToLine¶
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Click here to download DistancePointToLine and its CMakeLists.txt file. Once the tarball DistancePointToLine.tar has been downloaded and extracted,
cd DistancePointToLine/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:
./DistancePointToLine
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.