#ifdef ENABLE_UBO
    // #version 140
    #extension GL_ARB_uniform_buffer_object : enable

    #define START_MATPARAMS layout(std140) uniform matparams {
    #define END_MATPARAMS }
    #define MATPARAM
    #define attribute in
#else
    #define START_MATPARAMS
    #define END_MATPARAMS
    #define MATPARAM uniform
#endif