ITK  5.0.0
Insight Segmentation and Registration Toolkit
SphinxExamples/src/Core/Common/DistanceBetweenPoints/Code.cxx
/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include "itkPoint.h"
#include "vnl/vnl_math.h"
#include <iostream>
int main(int, char *[])
{
constexpr unsigned int Dimension = 3;
using CoordType = double;
p0[0] = 0.0;
p0[1] = 0.0;
p0[2] = 0.0;
p1[0] = 1.0;
p1[1] = 1.0;
p1[2] = 1.0;
PointType::RealType dist = p0.EuclideanDistanceTo(p1);
std::cout << "Dist: " << dist << std::endl;
if( dist != p1.EuclideanDistanceTo(p0) )
{
std::cerr << "p0.EuclideanDistanceTo(p1) != p1.EuclideanDistanceTo(p0)"
<< std::endl;
return EXIT_FAILURE;
}
if( p1.EuclideanDistanceTo( p1 ) != 0. )
{
std::cerr << "p1.EuclideanDistanceTo(p1) != 0."
<< std::endl;
return EXIT_FAILURE;
}
PointType::RealType dist2 = p0.SquaredEuclideanDistanceTo(p1);
std::cout << "Dist2: " << dist2 << std::endl;
if( vnl_math_abs( dist2 - dist * dist ) < vnl_math::eps )
{
std::cerr << "dist2 != dist * dist" << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}