tmat4x2< float, lowp > lowp_mat4x2
4 columns of 2 components matrix of low precision floating-point numbers.
tmat4x2< float, highp > highp_mat4x2
4 columns of 2 components matrix of high precision floating-point numbers.
tmat4x2< float, mediump > mediump_mat4x2
4 columns of 2 components matrix of medium precision floating-point numbers.