SphinxExamples/src/Core/Common/Matrix/Code.cxx

/*=========================================================================
 *
 *  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 <itkMatrix.h>
#include <itkVector.h>
 
#include <iostream>
 
static void
Construct();
// static void ConstructRunTimeDims();
static void
Multiply();
// static void Inverse();
 
int
main()
{
  Construct();
  Multiply();
  return EXIT_SUCCESS;
}
 
void
Construct()
{
  using MatrixType = itk::Matrix<double, 3, 3>;
  MatrixType M;
  M(0, 0) = 1.0;
  M(0, 1) = 2.0;
  M(0, 2) = 3.0;
  M(1, 0) = 4.0;
  M(1, 1) = 5.0;
  M(1, 2) = 6.0;
  M(2, 0) = 7.0;
  M(2, 1) = 8.0;
  M(2, 2) = 9.0;
 
  std::cout << "M: " << M << std::endl;
}
 
/*
void ConstructRunTimeDims()
{
  int matrixSize = 3;
  using MatrixType = itk::Matrix<double, matrixSize, matrixSize>;
  MatrixType M;
  M(0,0) = 1.0;
  M(0,1) = 2.0;
  M(0,2) = 3.0;
  M(1,0) = 4.0;
  M(1,1) = 5.0;
  M(1,2) = 6.0;
  M(2,0) = 7.0;
  M(2,1) = 8.0;
  M(2,2) = 9.0;
 
  std::cout << "M: " << M << std::endl;
}
*/
 
void
Multiply()
{
  using MatrixType = itk::Matrix<double, 3, 3>;
  MatrixType M;
  M(0, 0) = 1.0;
  M(0, 1) = 2.0;
  M(0, 2) = 3.0;
  M(1, 0) = 4.0;
  M(1, 1) = 5.0;
  M(1, 2) = 6.0;
  M(2, 0) = 7.0;
  M(2, 1) = 8.0;
  M(2, 2) = 9.0;
 
  std::cout << "M: " << M << std::endl;
 
  using VectorType = itk::Vector<double, 3>;
  VectorType V;
  V[0] = 1.0;
  V[1] = 2.0;
  V[2] = 3.0;
 
  std::cout << "V: " << V << std::endl;
 
  std::cout << "MV: " << M * V << std::endl;
}
 
/*
void Inverse()
{
 
}
*/