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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.
*
*=========================================================================*/
#include <iostream>
#include "itkPolyLineParametricPath.h"
#include "itkTestingMacros.h"
int
itkPolyLineParametricPathTest(int, char *[])
{
constexpr unsigned int Dimension = 2;
using PathType = itk::PolyLineParametricPath<Dimension>;
using InputType = PathType::InputType;
using OffsetType = PathType::OffsetType;
using VertexType = PathType::VertexType;
bool passed = true;
InputType input;
OffsetType offset;
VertexType v;
auto path = PathType::New();
ITK_EXERCISE_BASIC_OBJECT_METHODS(path, PolyLineParametricPath, ParametricPath);
v.Fill(1);
path->AddVertex(v);
v[0] = 2;
v[1] = 3;
path->AddVertex(v);
v[0] = 3;
v[1] = 4;
path->AddVertex(v);
v[0] = 0;
v[1] = 5;
path->AddVertex(v);
v.Fill(1);
path->AddVertex(v);
std::cout << "Evaluating at 0, 0.5, and 4.0: " << path->Evaluate(0) << ", " << path->Evaluate(0.5) << ", "
<< path->Evaluate(4.0) << std::endl;
std::cout << "Evaluating to an index at 0, 0.5, and 1.0: " << path->EvaluateToIndex(0) << ", "
<< path->EvaluateToIndex(0.5) << ", " << path->EvaluateToIndex(1.0) << std::endl;
if (path->EvaluateToIndex(4.0) != path->EvaluateToIndex(0))
{
std::cout << "EvaluateToIndex() Failed" << std::endl;
passed = false;
}
std::cout << "Evaluating the derivative at 0, 0.5, and 1.0: " << path->EvaluateDerivative(0) << ", "
<< path->EvaluateDerivative(0.5) << ", " << path->EvaluateDerivative(1.0) << std::endl;
if (static_cast<int>(0.5 + 1000 * (path->EvaluateDerivative(0.5))[0]) != 1000 ||
static_cast<int>(0.5 + 1000 * (path->EvaluateDerivative(0.5))[1]) != 2000)
{
std::cout << "EvaluateDerivative() Failed" << std::endl;
passed = false;
}
input = 0;
offset = path->IncrementInput(input);
std::cout << "Incrementing the input from 0 to " << input << ": " << offset << std::endl;
input = 0.5;
offset = path->IncrementInput(input);
std::cout << "Incrementing the input from 0.5 to " << input << ": " << offset << std::endl;
// Test a degenerate path
std::cout << "Generating degenerate path" << std::endl;
auto path2 = PathType::New();
// Add a bunch of points closely spaced together
for (double k = 0; k < 10; k += 0.1)
{
v.Fill(k);
path2->AddVertex(v);
}
// Add a point that is very far away from the first points
v.Fill(100);
path2->AddVertex(v);
PathType::InputType path2Input = path2->StartOfInput();
PathType::OffsetType zeroOffset;
zeroOffset.Fill(0);
std::cout << "Starting degenerate path test" << std::endl;
while (true)
{
offset = path2->IncrementInput(path2Input);
if (offset == zeroOffset)
{
break;
}
}
if (passed)
{
std::cout << "Test passed" << std::endl;
return EXIT_SUCCESS;
}
else
{
std::cout << "Test failed" << std::endl;
return EXIT_FAILURE;
}
}
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