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Medial Code Documentation
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Holds strides information for Map. More...
#include <Stride.h>
Public Types | |
| enum | { InnerStrideAtCompileTime = _InnerStrideAtCompileTime , OuterStrideAtCompileTime = _OuterStrideAtCompileTime } |
| typedef Eigen::Index | Index |
Public Member Functions | |
| EIGEN_DEVICE_FUNC | Stride () |
| Default constructor, for use when strides are fixed at compile time. | |
| EIGEN_DEVICE_FUNC | Stride (Index outerStride, Index innerStride) |
| Constructor allowing to pass the strides at runtime. | |
| EIGEN_DEVICE_FUNC | Stride (const Stride &other) |
| Copy constructor. | |
| EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR Index | outer () const |
| EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR Index | inner () const |
Protected Attributes | |
| internal::variable_if_dynamic< Index, OuterStrideAtCompileTime > | m_outer |
| internal::variable_if_dynamic< Index, InnerStrideAtCompileTime > | m_inner |
Holds strides information for Map.
This class holds the strides information for mapping arrays with strides with class Map.
It holds two values: the inner stride and the outer stride.
The inner stride is the pointer increment between two consecutive entries within a given row of a row-major matrix or within a given column of a column-major matrix.
The outer stride is the pointer increment between two consecutive rows of a row-major matrix or between two consecutive columns of a column-major matrix.
These two values can be passed either at compile-time as template parameters, or at runtime as arguments to the constructor.
Indeed, this class takes two template parameters:
| _OuterStrideAtCompileTime | the outer stride, or Dynamic if you want to specify it at runtime. |
| _InnerStrideAtCompileTime | the inner stride, or Dynamic if you want to specify it at runtime. |
Here is an example:
Output:
Both strides can be negative. However, a negative stride of -1 cannot be specified at compile time because of the ambiguity with Dynamic which is defined to -1 (historically, negative strides were not allowed).
Note that for compile-time vectors (ColsAtCompileTime==1 or RowsAtCompile==1), the inner stride is the pointer increment between two consecutive elements, regardless of storage layout.
| typedef Eigen::Index Eigen::Stride< _OuterStrideAtCompileTime, _InnerStrideAtCompileTime >::Index |
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1.9.8