switch to x,y,z as spherical coordinates are ignored anyway

catalyst_adapter.cpp

@@ -56,9 +56,9 @@ void catalyst_adapter_secondary_constructor(){
     comin_descrdata_get_domain_verts_vlon(jg, &vlon, nverts_arr);
     comin_descrdata_get_domain_verts_vlat(jg, &vlat, nverts_arr);
     channel["data/coordsets/coords/type"] = "explicit";
-    channel["data/coordsets/coords/values/phi"].set_external(vlon, nverts);
-    channel["data/coordsets/coords/values/theta"].set_external(vlat, nverts);
-    channel["data/coordsets/coords/values/r"].set(std::vector<double>(nverts, 1.0));
+    channel["data/coordsets/coords/values/x"].set_external(vlon, nverts);
+    channel["data/coordsets/coords/values/y"].set_external(vlat, nverts);
+    channel["data/coordsets/coords/values/z"].set(std::vector<double>(nverts, 1.0));
 
     channel["data/topologies/mesh/type"] = "unstructured";
     channel["data/topologies/mesh/coordset"] = "coords";