const Vector4 &value = (sem==0 ? vtx : attr[sem]);
if(type==UNSIGNED_BYTE)
store_attribute<uint8_t>(ptr, value, !integer, cc);
const Vector4 &value = (sem==0 ? vtx : attr[sem]);
if(type==UNSIGNED_BYTE)
store_attribute<uint8_t>(ptr, value, !integer, cc);