void attrib(unsigned i, float x) { attrib(i, x, 0, 0, 1); }
void attrib(unsigned i, float x, float y) { attrib(i, x, y, 0, 1); }
void attrib(unsigned i, float x, float y, float z) { attrib(i, x, y, z, 1); }
void attrib(unsigned i, float x) { attrib(i, x, 0, 0, 1); }
void attrib(unsigned i, float x, float y) { attrib(i, x, y, 0, 1); }
void attrib(unsigned i, float x, float y, float z) { attrib(i, x, y, z, 1); }