+ add("attrib1", static_cast<void (Loader::*)(unsigned, float)>(&Loader::attrib));
+ add("attrib2", static_cast<void (Loader::*)(unsigned, float, float)>(&Loader::attrib));
+ add("attrib3", static_cast<void (Loader::*)(unsigned, float, float, float)>(&Loader::attrib));
+ add("attrib4", static_cast<void (Loader::*)(unsigned, float, float, float, float)>(&Loader::attrib));
+ add("tangent3", static_cast<void (Loader::*)(float, float, float)>(&Loader::tangent));
+ add("binormal3", static_cast<void (Loader::*)(float, float, float)>(&Loader::binormal));