Add a number of missing struct fields to Python bindings.

It is quite possible that there are a few other fields still missing since we currently do not yet have automated testing of struct field existence.

Fixes #747.

PiperOrigin-RevId: 517189048
Change-Id: I7c1d95e700eaea05aaa3cde1fd05e1a259553117

python/mujoco/structs.cc

@@ -983,6 +983,7 @@ MjvPerturbWrapper::MjWrapper()
       }()),
       X(refpos),
       X(refquat),
+      X(refselpos),
       X(localpos) {}
 #undef X
 
@@ -1299,8 +1300,11 @@ PYBIND11_MODULE(_structs, m) {
 #define X(var) mjVisualGlobal.def_readwrite(#var, &raw::MjVisualGlobal::var)
   X(fovy);
   X(ipd);
+  X(azimuth);
+  X(elevation);
   X(linewidth);
   X(glow);
+  X(realtime);
   X(offwidth);
   X(offheight);
 #undef X
@@ -1966,11 +1970,14 @@ This is useful for example when the MJB is not available as a file on disk.)"));
   X(skinselect);
   X(active);
   X(active2);
+  X(localmass);
+  X(scale);
 #undef X
 
 #define X(var) DefinePyArray(mjvPerturb, #var, &MjvPerturbWrapper::var)
   X(refpos);
   X(refquat);
+  X(refselpos);
   X(localpos);
 #undef X
 

python/mujoco/structs.h

@@ -611,6 +611,7 @@ class MjWrapper<raw::MjvPerturb> : public WrapperBase<raw::MjvPerturb> {
   #define X(var) py_array_or_tuple_t<mjtNum> var
   X(refpos);
   X(refquat);
+  X(refselpos);
   X(localpos);
   #undef X
 };