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more changes in ScalarMultiple, reintroduce FloatingPoint in NumTraits, improve

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examples
This commit is contained in:
Benoit Jacob
2007-12-26 09:25:00 +00:00
parent 05a49547e1
commit 6b9370e0f0
7 changed files with 57 additions and 25 deletions
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13
doc/examples/class_DynBlock.cpp
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@@ -6,14 +6,21 @@ template<typename Scalar, typename Derived>
Eigen::DynBlock<Derived>
topLeftCorner(MatrixBase<Scalar, Derived>& m, int rows, int cols)
{
return m.dynBlock(0, 0, rows, cols);
return Eigen::DynBlock<Derived>(m.ref(), 0, 0, rows, cols);
}
template<typename Scalar, typename Derived>
const Eigen::DynBlock<Derived>
topLeftCorner(const MatrixBase<Scalar, Derived>& m, int rows, int cols)
{
return Eigen::DynBlock<Derived>(m.ref(), 0, 0, rows, cols);
}
int main(int, char**)
{
Matrix4d m = Matrix4d::identity();
cout << topLeftCorner(m, 2, 3) << endl;
topLeftCorner(m, 2, 3) *= 5;
cout << topLeftCorner(4*m, 2, 3) << endl; // calls the const version
topLeftCorner(m, 2, 3) *= 5; // calls the non-const version
cout << "Now the matrix m is:" << endl << m << endl;
return 0;
}