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/*=========================================================================
Program: Visualization Toolkit
Module: vtkVectorOperators.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#ifndef vtkVectorOperators_h
#define vtkVectorOperators_h
// This set of operators enhance the vtkVector classes, allowing various
// operator overloads one might expect.
#include "vtkVector.h"
// Description:
// Unary minus / negation of vector.
VTK_ABI_NAMESPACE_BEGIN
template <typename A, int Size>
vtkVector<A, Size> operator-(const vtkVector<A, Size>& v)
{
vtkVector<A, Size> ret;
for (int i = 0; i < Size; ++i)
{
ret[i] = -v[i];
}
return ret;
}
// Description:
// Performs addition of vectors of the same basic type.
template <typename A, int Size>
vtkVector<A, Size> operator+(const vtkVector<A, Size>& v1, const vtkVector<A, Size>& v2)
{
vtkVector<A, Size> ret;
for (int i = 0; i < Size; ++i)
{
ret[i] = v1[i] + v2[i];
}
return ret;
}
// Description:
// Add the vector b to the vector a of the same basic type.
template <typename T, int Size>
vtkVector<T, Size>& operator+=(vtkVector<T, Size>& a, const vtkVector<T, Size>& b)
{
for (int dim = 0; dim < Size; ++dim)
{
a[dim] += b[dim];
}
return a;
}
// Description:
// Performs subtraction of vectors of the same basic type.
template <typename A, int Size>
vtkVector<A, Size> operator-(const vtkVector<A, Size>& v1, const vtkVector<A, Size>& v2)
{
vtkVector<A, Size> ret;
for (int i = 0; i < Size; ++i)
{
ret[i] = v1[i] - v2[i];
}
return ret;
}
// Description:
// Substract the vector b to the vector a of the same basic type.
template <typename T, int Size>
vtkVector<T, Size>& operator-=(vtkVector<T, Size>& a, const vtkVector<T, Size>& b)
{
for (int dim = 0; dim < Size; ++dim)
{
a[dim] -= b[dim];
}
return a;
}
// Description:
// Performs multiplication of vectors of the same basic type.
template <typename A, int Size>
vtkVector<A, Size> operator*(const vtkVector<A, Size>& v1, const vtkVector<A, Size>& v2)
{
vtkVector<A, Size> ret;
for (int i = 0; i < Size; ++i)
{
ret[i] = v1[i] * v2[i];
}
return ret;
}
// Description:
// Performs multiplication of vectors by a scalar value.
template <typename A, typename B, int Size>
vtkVector<A, Size> operator*(const vtkVector<A, Size>& v1, const B& scalar)
{
vtkVector<A, Size> ret;
for (int i = 0; i < Size; ++i)
{
ret[i] = v1[i] * scalar;
}
return ret;
}
// Description:
// Performs divisiom of vectors of the same type.
template <typename A, int Size>
vtkVector<A, Size> operator/(const vtkVector<A, Size>& v1, const vtkVector<A, Size>& v2)
{
vtkVector<A, Size> ret;
for (int i = 0; i < Size; ++i)
{
ret[i] = v1[i] / v2[i];
}
return ret;
}
// Description:
// Several macros to define the various operator overloads for the vectors.
#define vtkVectorOperatorNegate(vectorType, type, size) \
inline vectorType operator-(const vectorType& v) \
{ \
return vectorType((-static_cast<vtkVector<type, size>>(v)).GetData()); \
}
#define vtkVectorOperatorPlus(vectorType, type, size) \
inline vectorType operator+(const vectorType& v1, const vectorType& v2) \
{ \
return vectorType( \
(static_cast<vtkVector<type, size>>(v1) + static_cast<vtkVector<type, size>>(v2)) \
.GetData()); \
}
#define vtkVectorOperatorMinus(vectorType, type, size) \
inline vectorType operator-(const vectorType& v1, const vectorType& v2) \
{ \
return vectorType( \
(static_cast<vtkVector<type, size>>(v1) - static_cast<vtkVector<type, size>>(v2)) \
.GetData()); \
}
#define vtkVectorOperatorMultiply(vectorType, type, size) \
inline vectorType operator*(const vectorType& v1, const vectorType& v2) \
{ \
return vectorType( \
(static_cast<vtkVector<type, size>>(v1) * static_cast<vtkVector<type, size>>(v2)) \
.GetData()); \
}
#define vtkVectorOperatorMultiplyScalar(vectorType, type, size) \
template <typename B> \
inline vectorType operator*(const vectorType& v1, const B& scalar) \
{ \
return vectorType((static_cast<vtkVector<type, size>>(v1) * scalar).GetData()); \
}
#define vtkVectorOperatorMultiplyScalarPre(vectorType, type, size) \
template <typename B> \
inline vectorType operator*(const B& scalar, const vectorType& v1) \
{ \
return vectorType((static_cast<vtkVector<type, size>>(v1) * scalar).GetData()); \
}
#define vtkVectorOperatorDivide(vectorType, type, size) \
inline vectorType operator/(const vectorType& v1, const vectorType& v2) \
{ \
return vectorType( \
(static_cast<vtkVector<type, size>>(v1) / static_cast<vtkVector<type, size>>(v2)) \
.GetData()); \
}
#define vtkVectorOperatorMacro(vectorType, type, size) \
vtkVectorOperatorNegate(vectorType, type, size); \
vtkVectorOperatorPlus(vectorType, type, size); \
vtkVectorOperatorMinus(vectorType, type, size); \
vtkVectorOperatorMultiply(vectorType, type, size); \
vtkVectorOperatorMultiplyScalar(vectorType, type, size); \
vtkVectorOperatorMultiplyScalarPre(vectorType, type, size); \
vtkVectorOperatorDivide(vectorType, type, size)
// Description:
// Overload the operators for the common types.
vtkVectorOperatorMacro(vtkVector2i, int, 2);
vtkVectorOperatorMacro(vtkVector2f, float, 2);
vtkVectorOperatorMacro(vtkVector2d, double, 2);
vtkVectorOperatorMacro(vtkVector3i, int, 3);
vtkVectorOperatorMacro(vtkVector3f, float, 3);
vtkVectorOperatorMacro(vtkVector3d, double, 3);
VTK_ABI_NAMESPACE_END
#endif
// VTK-HeaderTest-Exclude: vtkVectorOperators.h
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