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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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.
*
*=========================================================================*/
/**
*
* This program illustrates the use of Geometric objects
*
*/
#include "itkVector.h"
#include <iostream>
//-------------------------
//
// Main code
//
//-------------------------
int
itkVectorGeometryTest(int, char *[])
{
// Dimension & Type
constexpr unsigned int N = 3;
using ValueType = double;
// Vector type
using VectorType = itk::Vector<ValueType, N>;
/*
VectorType vv;
vv = 0, 2, 4;
if( vv[0] != 0 || vv[1] != 2 || vv[2] != 4 )
{
std::cerr << "Error initializing the Vector " << std::endl;
return EXIT_FAILURE;
}
*/
VectorType va;
va[0] = 1.0;
va[1] = 2.0;
va[2] = 7.0;
std::cout << "va = { 1.0, 2.0, 7.0 } = ";
std::cout << va << std::endl;
VectorType vb;
vb[0] = 1.0;
vb[1] = 3.0;
vb[2] = 5.0;
std::cout << "vb = (1,3,5) = ";
std::cout << vb << std::endl;
VectorType vc = vb - va;
std::cout << "vc = vb - va = ";
std::cout << vc << std::endl;
VectorType vd = va * 5.0;
std::cout << "vd = va * 5.0 = ";
std::cout << vd << std::endl;
VectorType ve = vd / 5.0;
std::cout << "ve = vd * 5.0 = ";
std::cout << ve << std::endl;
vd += va;
std::cout << "vd += va = ";
std::cout << vd << std::endl;
ve -= vb;
std::cout << "ve -= vb = ";
std::cout << ve << std::endl;
VectorType vh = vb;
std::cout << "vh = vb = ";
std::cout << vh << std::endl;
VectorType vg(va);
std::cout << "vg( va ) = ";
std::cout << vg << std::endl;
ValueType norm2 = vg.GetSquaredNorm();
std::cout << "vg squared norm = ";
std::cout << norm2 << std::endl;
ValueType norm = vg.GetNorm();
std::cout << "vg norm = ";
std::cout << norm << std::endl;
// Test for vnl interface
// Test the no const version that returns an vnl_vector_ref
vnl_vector_ref<ValueType> vnlVector = va.GetVnlVector();
{
std::cout << "vnl_vector_ref = va ";
for (unsigned int i = 0; i < N; ++i)
{
std::cout << vnlVector[i] << ", ";
}
std::cout << std::endl;
std::cout << "vnl_vector_ref.begin() = va.Begin()";
std::cout << std::endl;
std::cout << vnlVector.begin() << " = ";
std::cout << va.cbegin() << std::endl;
}
// Test the const version that returns an vnl_vector
const VectorType vf(va);
vnl_vector<ValueType> vnlVector2 = vf.GetVnlVector();
{
std::cout << "vnl_vector = va ";
for (unsigned int i = 0; i < N; ++i)
{
std::cout << vnlVector2[i] << ", ";
}
std::cout << std::endl;
std::cout << "vnl_vector.begin() != vf.Begin()";
std::cout << std::endl;
std::cout << vnlVector2.begin() << " = ";
std::cout << vf.cbegin() << std::endl;
}
// Test for operator== and operator!=
{
VectorType vv;
vv[0] = 1;
vv[1] = 3;
vv[2] = 5;
VectorType vw;
vw.Fill(0);
if (vv == vw)
{
std::cout << std::endl;
std::cout << "Problem with operator==() " << std::endl;
std::cout << "Vector " << vv;
std::cout << " is reported as being equal to " << std::endl;
std::cout << "Vector " << vw << std::endl;
return EXIT_FAILURE;
}
VectorType ww;
ww = vv;
if (vv != ww)
{
std::cout << std::endl;
std::cout << "Problem with operator!=() " << std::endl;
std::cout << "Vector " << vv;
std::cout << " is reported as being different from " << std::endl;
std::cout << "Vector " << ww << std::endl;
return EXIT_FAILURE;
}
if (!(vv == ww))
{
std::cout << std::endl;
std::cout << "Problem with operator==() " << std::endl;
std::cout << "Vector " << vv;
std::cout << " is reported as not being equal to " << std::endl;
std::cout << "Vector " << ww << std::endl;
return EXIT_FAILURE;
}
}
// Test for CastFrom() method
{
std::cout << "Test for CastFrom() method... ";
const float tolerance = 1e-7;
// Vector Classes
using DoubleVectorType = itk::Vector<double, N>;
using FloatVectorType = itk::Vector<float, N>;
DoubleVectorType dp;
dp[0] = 1.0;
dp[1] = 1.7;
dp[2] = 1.9;
FloatVectorType fp;
fp[0] = 0.0;
fp[1] = 0.0;
fp[2] = 0.0;
fp.CastFrom(dp);
for (unsigned int i = 0; i < N; ++i)
{
auto val = static_cast<FloatVectorType::ValueType>(dp[i]);
if (itk::Math::abs(val - fp[i]) > tolerance)
{
std::cout << "Test failed at component " << i << std::endl;
return EXIT_FAILURE;
}
}
std::cout << " PASSED ! " << std::endl;
}
return EXIT_SUCCESS;
}
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