11 std::set
<Thing
*> things
;
12 std::set
<Platform
*> platforms
;
13 bool checkGround(Thing
* thing
, Platform
*platform
, double &t
);
15 void subscribe(Thing
* thing
);
16 void addPlatform(Platform
* linha
);
18 void removePlatforms();
19 void deleteThing(Thing
* thing
);