Instead of directly setting position and orientation we've now
added a "transforms" property. This property contains zero or many
transformations. The result of these is what drives changes to an
entity's position and orientation.
By cleanly separate disrete transformations we can more easily undo
or alter them. This allows us to do things where the position or
orientation of an entity is affected by other properties, or other
entities.
The client protocol is intact. Changes to position and orientation is
still sent the same way, by specifying "pos" and "orientation". However,
these values will now not be written directly to corresponding values on
the entity. Instead they will first be written to the "transforms" property,
with the final values being a result of combining all data in the property.
All IG code should use the interface of LocatedEntity when dealing
with any entity, rather than sometimes requiring Entity. Add virtual
functions to the interface where required, and modify all other interfaces
to stop them using Entity. This makes the code way cleaner, and much better
de-coupled.
* rulesets/BBoxProperty.cpp, rulesets/BBoxProperty.h: A new property
to make BBOX optional and more dynamic.
* rulesets/MultiHandlerProperty.cpp, rulesets/MultiHandlerProperty.h,
rulesets/MultiHandlerProperty_impl.h: A new property for those
generic properties that need many handlers.
