public Matrix4d m11(double m11) {
        this.m11 = m11;
        properties &= ~PROPERTY_ORTHONORMAL;
        if (m11 != 1.0)
            properties &= ~(PROPERTY_IDENTITY | PROPERTY_TRANSLATION);
        return this;
    }
public Matrix4d m11 ( double m11 ) { this . m11 = m11 ; properties &= ~ PROPERTY_ORTHONORMAL ; if ( m11 != 1.0 ) properties &= ~ ( PROPERTY_IDENTITY | PROPERTY_TRANSLATION ) ; return this ; }
Set the value of the matrix element at column 1 and row 1.

@param m11
the new value
@return this