tmat2x3< float, lowp > lowp_mat2x3
2 columns of 3 components matrix of low precision floating-point numbers.
tmat2x3< float, mediump > mediump_mat2x3
2 columns of 3 components matrix of medium precision floating-point numbers.
tmat2x3< float, highp > highp_mat2x3
2 columns of 3 components matrix of high precision floating-point numbers.