 precision floating-point numbers.   /// There is no guarantee on the actual precision.   ///   /// @see <a href="http://www.opengl.org/registry/doc/GLSLangSpec.0.00.0.pdf">GLSL 0.00.0 specification, section 0.0.0 Matrices</a>   /// @see <a href="http://www.opengl.org/registry/doc/GLSLangSpec.0.00.0.pdf">GLSL 0.00.0 specification, section 0.0.0 Precision Qualifier</a>   typedef tmat0x0<float, 