Further details on classes like epsilon compare, further unit tests.

src/blackmisc/mathmatrixbase.h

@@ -203,6 +203,18 @@ public:
         return this->m_matrix.isIdentity();
     }
 
+    /*!
+     * \brief Is identity matrix? Epsilon considered.
+     * \return
+     */
+    bool isIdentityEpsilon() const
+    {
+        ImplMatrix m(0.0);
+        m += (*this);
+        m.round();
+        return m.isIdentity();
+    }
+
     /*!
      * \brief Set as identity matrix
      * \return
@@ -228,6 +240,18 @@ public:
      */
     bool isZero() const;
 
+    /*!
+     * \brief Is identity matrix? Epsilon considered.
+     * \return
+     */
+    bool isZeroEpsilon() const
+    {
+        ImplMatrix m(0.0);
+        m += (*this);
+        m.round();
+        return m.isZero();
+    }
+
     /*!
      * \brief All values equal, if so matirx is not invertible
      * \return
@@ -240,6 +264,11 @@ public:
      */
     void fill(double value) { this->m_matrix.fill(value); }
 
+    /*!
+     * \brief Round all values
+     */
+    void round();
+
     /*!
      * \brief Get element
      * \param row