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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.
*
*=========================================================================*/
#ifndef itkSphereSpatialFunction_hxx
#define itkSphereSpatialFunction_hxx
namespace itk
{
template <unsigned int VImageDimension, typename TInput>
auto
SphereSpatialFunction<VImageDimension, TInput>::Evaluate(const InputType & position) const -> OutputType
{
double acc = 0;
for (unsigned int i = 0; i < VImageDimension; ++i)
{
acc += (position[i] - m_Center[i]) * (position[i] - m_Center[i]);
}
acc -= m_Radius * m_Radius;
if (acc <= 0) // inside the sphere
{
return 1;
}
else
{
return 0; // outside the sphere
}
}
template <unsigned int VImageDimension, typename TInput>
void
SphereSpatialFunction<VImageDimension, TInput>::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
unsigned int i;
os << indent << "Center: [";
for (i = 0; i < VImageDimension - 1; ++i)
{
os << m_Center[i] << ", ";
}
os << ']' << std::endl;
os << indent << "Radius: " << m_Radius << std::endl;
}
} // end namespace itk
#endif
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