向量的C ++本征矩阵

问题描述

大家好，

我正在使用Eigen v.3.3.3，并尝试将Vector3f与浮点数相乘。

    Eigen::MatrixXf weighted_adjacency_matrix(2,2); // [n,n]
    weighted_adjacency_matrix << 0,1,0;

    Eigen::Matrix<Eigen::Vector3f,Eigen::Dynamic,1> locations;  // [n]
    Eigen::Vector3f vec1(1,2,3),vec2(2,3,4);
    locations << vec1,vec2;

    Eigen::Matrix<Eigen::Vector3f,Eigen::Dynamic> result = weighted_adjacency_matrix.cwiseProduct(locations);

在代码中，我尝试对两个矩阵进行逐点乘法。
stacktrace如下所示：

Severity    Code    Description Project File    Line    Suppression State
Error   C2039   'ReturnType': is not a member of 'Eigen::ScalarBinaryOpTraits<LhsScalar,RhsScalar,Eigen::internal::scalar_product_op<LhsScalar,RhsScalar>>' **  *****\packages\eigen.3.3.3\build\native\include\eigen\src\core\functors\binaryfunctors.h    78  
Error   C3646   'result_type': unkNown override specifier   **  *****\packages\eigen.3.3.3\build\native\include\eigen\src\core\functors\binaryfunctors.h    78  
Error   C4430   missing type specifier - int assumed. Note: C++ does not support default-int    **  *****\packages\eigen.3.3.3\build\native\include\eigen\src\core\functors\binaryfunctors.h    78  
Error   C4430   missing type specifier - int assumed. Note: C++ does not support default-int    **  *****\packages\eigen.3.3.3\build\native\include\eigen\src\core\functors\binaryfunctors.h    86  
Error   C2143   Syntax error: missing ';' before '('    **  *****\packages\eigen.3.3.3\build\native\include\eigen\src\core\functors\binaryfunctors.h    86  
Error   C2433   'Eigen::internal::scalar_product_op<float,_Scalar>::result_type': '__forceinline' not permitted on data declarations    **  *****\packages\eigen.3.3.3\build\native\include\eigen\src\core\functors\binaryfunctors.h    86  
Error   C2327   'Eigen::internal::scalar_product_op<float,_Scalar>::result_type': is not a type name,static,or enumerator **  *****\packages\eigen.3.3.3\build\native\include\eigen\src\core\functors\binaryfunctors.h    91  
Error   C4430   missing type specifier - int assumed. Note: C++ does not support default-int    **  *****\packages\eigen.3.3.3\build\native\include\eigen\src\core\functors\binaryfunctors.h    91  
Error   C2433   'result_type': '__forceinline' not permitted on data declarations   **  *****\packages\eigen.3.3.3\build\native\include\eigen\src\core\functors\binaryfunctors.h    91  
Error   C2365   'Eigen::internal::scalar_product_op<float,_Scalar>::result_type': redeFinition; prevIoUs deFinition was 'data member'   **  *****\packages\eigen.3.3.3\build\native\include\eigen\src\core\functors\binaryfunctors.h    91  
Error   C2061   Syntax error: identifier 'predux'   **  *****\packages\eigen.3.3.3\build\native\include\eigen\src\core\functors\binaryfunctors.h    91  
Error   C2334   unexpected token(s) preceding '{'; skipping apparent function body  **  *****\packages\eigen.3.3.3\build\native\include\eigen\src\core\functors\binaryfunctors.h    92

为什么不能将Vector3f与浮点数进行逐点乘法运算？

任何解决方案和/或想法将不胜感激！

解决方法

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c++eigen3 matrix-multiplication