template<int OuterStrideAtCompileTime_, int InnerStrideAtCompileTime_>
class Eigen::Stride< OuterStrideAtCompileTime_, InnerStrideAtCompileTime_ >
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:
- 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:
cout << Map<MatrixXi, 0, Stride<Dynamic,2> >
(
array, 3, 3, Stride<Dynamic,2>(8, 2))
<< endl;
Output:
0 8 16
2 10 18
4 12 20
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.
- See also
- class InnerStride, class OuterStride, Storage orders
Definition at line 54 of file Stride.h.