@Override
    public String toString() {
        StringBuilder result = new StringBuilder("Matrix3f\n[\n");
        result.append(" ");
        result.append(m00);
        result.append("  ");
        result.append(m01);
        result.append("  ");
        result.append(m02);
        result.append(" \n");
        result.append(" ");
        result.append(m10);
        result.append("  ");
        result.append(m11);
        result.append("  ");
        result.append(m12);
        result.append(" \n");
        result.append(" ");
        result.append(m20);
        result.append("  ");
        result.append(m21);
        result.append("  ");
        result.append(m22);
        result.append(" \n]");
        return result.toString();
    }
Returns a string representation of the matrix, which is unaffected. For
example, the identity matrix is represented by:
<pre>
Matrix3f
[
 1.0  0.0  0.0
 0.0  1.0  0.0
 0.0  0.0  1.0
]
</pre>

@return the string representation (not null, not empty)
jme3-core/src/main/java/com/jme3/math/Matrix3f.java