/usr/include/ITK-4.5/itkTriangleHelper.h is in libinsighttoolkit4-dev 4.5.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* 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.
*
*=========================================================================*/
#ifndef __itkTriangleHelper_h
#define __itkTriangleHelper_h
#include "itkCrossHelper.h"
namespace itk
{
/** \class TriangleHelper
* \brief A convenience class for computation of various triangle elements in
* 2D or 3D.
* \ingroup ITKCommon
*/
template< typename TPoint >
class TriangleHelper
{
public:
typedef TriangleHelper Self;
typedef TPoint PointType;
typedef typename PointType::CoordRepType CoordRepType;
typedef typename PointType::VectorType VectorType;
typedef CrossHelper< VectorType > CrossVectorType;
itkStaticConstMacro(PointDimension, unsigned int, PointType::PointDimension);
/** \brief return true if (iA,iB,iC) forms an Obtuse angle (above 90
degrees)*/
static bool IsObtuse(const PointType & iA, const PointType & iB, const PointType & iC);
/** \brief Compute Normal vector to the triangle formed by (iA,iB,iC)*/
static VectorType ComputeNormal(const PointType & iA,
const PointType & iB,
const PointType & iC);
/** \brief Compute cotangent(iA,iB,iC)*/
static CoordRepType Cotangent(const PointType & iA,
const PointType & iB,
const PointType & iC);
/** \brief Compute barycenter, with given weights*/
static PointType ComputeBarycenter(
const CoordRepType & iA1, const PointType & iP1,
const CoordRepType & iA2, const PointType & iP2,
const CoordRepType & iA3, const PointType & iP3);
/** \brief Compute angles (iA,iB,iC)*/
static CoordRepType ComputeAngle(const PointType & iP1, const PointType & iP2,
const PointType & iP3);
/** \brief Compute center of mass*/
static PointType ComputeGravityCenter(
const PointType & iP1,
const PointType & iP2,
const PointType & iP3);
/** \brief Compute circum center*/
static PointType ComputeCircumCenter(
const PointType & iP1,
const PointType & iP2,
const PointType & iP3);
/** \brief Compute circum center constrained to be inside the triangle.*/
static PointType ComputeConstrainedCircumCenter(const PointType & iP1,
const PointType & iP2, const PointType & iP3);
/** \brief Compute Area.*/
static CoordRepType ComputeArea(const PointType & iP1, const PointType & iP2, const PointType & iP3);
static CoordRepType ComputeMixedArea( const PointType& iP1, const PointType& iP2, const PointType &iP3 );
private:
TriangleHelper(const Self &); // purposely not implemented
void operator=(const Self &); // purposely not implemented
};
}
#include "itkTriangleHelper.hxx"
#endif
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