In contrast to the comment in o_beginOverride() VAR(VAR_OVERRIDE) is not set in the disassembly. In addition the cutscene stack-pointer is always 0 as this feature is not used in v0. This makes o_beginOverride() work the same way o2_beginOverride() and so it is not needed anymore.
Note that fetchScriptWord() was changed to ScummEngine::fetchScriptWord() in o2_beginOverride() as ScummEngine_v0::fetchScriptWord() only fetches a byte.
As we need two bytes here we have to use ScummEngine::fetchScriptWord().
command in v0
If for instance an object necessary for the sentence command is not reachable or pickupable (try to use faucet (object 55) with jar with water in microwave (object 50), the pick-up script of the jar will tell the actor to pickup object 99 (jar not in microwave)) the actor will try to pick-up the jar infinitely.
This is fixed by counting the amount of nested scripts the sentence command has called (directly or indirectly) so far and aborts it if there have been too many.
Some object functions allow actor IDs and object IDs as parameters. They are easily distinguishable in engines > 0 as actor IDs are < _numActors and object IDs are bigger. In v0 this is not the case as there are objects with IDs like 3 and 5 (e.g. the hamster). So object ID handling was unified for v0 and the other engines by introducing objIsActor(), objToActor() and ActorToObj().
- handle mode switching correctly
- do not freeze scripts in cutscene mode (mode 0), as some scripts are freezed in mode 0 that should not be freezed
- kModeNoNewKid (mode 2) needs the same userState as mode 3
- rename o_cursorCommand to o_setMode as it is not really cursor specific
- handle actorHiding correctly (do not set costume to 0 as the previous costume cannot be reverted after hiding)
- add drawSentence
- document meanings for actor misc flags
- fix actor names for "new kid" if the radiation suit is used (all kids are set to 0 then with actor 0 name " ")
- cleanup actor switching routine
- _userPut is not used anymore in v0
- getVerbEntrypoint() should not handle walk-to differently (revert 0x0D handling back to original behavior)
- VAR_ACTIVE_ACTOR actually is VAR_ACTIVE_OBJECT2
- runSentenceScript(): "if (_cmdVerb == kVerbWalkTo)" must be "if (_cmdVerb != kVerbWalkTo)"
- MM C64 uses command stack (SentenceTab, doSentence()) now
- _cmdObject... added for current SentenceTab. The _active... variables are only used to build a sentence in the inventory but never by a script.
-> many routines are not needed anymore and are removed
- removed complicated and unnecessary _v0ObjectIndex, _v0ObjectInInventory, _v0ObjectFlag vars
- started to merge object id and type into one object value (type<<8|id)
- verb preposition ids do not dependent on language -> remove from VerbSettings
Note:
- objects with type=0 are foreground objects. They have a state, an owner and a bg overlay image.
- objects with type=1 are bg objects. They do not have a state or owner and are already contained in the bg image. The do not have an entry in objectState/OwnerTable
Note: the transition is not completed yet. The code compiles but is probably not runnable as not every occurrence of _activeInventory has been properly replaced.
The usage of _v0ObjectIndex and _v0ObjectInInventory should be revised too and both variables should be replaced by another mechanism (maybe by using a single variable "obj = (type << 8) | id").
- moved v0 only vars _activeInventory, _activeObject, _activeVerb from ScummEngine_v2 to ScummEngine_v0
- removed _activeActor, _activeInvExecute, _activeObject2Inv and _activeInventory. They are handled by _activeObject/_activeObjectType and _activeObject2/_activeObject2Type now.
- removed _activeObject(2)Index as they only bloat the code without any benefit (?)
- merge prep-name tables from ScummEngine_v2::drawPreposition() and ScummEngine_v0::drawSentenceWord() by introducing ScummEngine_v2::drawPreposition()
- rename ObjectData.flags -> obj_type (quick-fix only, needs review! Maybe obj_nr and obj_type can be merged into one var: obj_nr = (obj_type << 8) | obj_nr)
- o_unknown2 is negation of o_ifActiveObject (o_ifNotEqualActiveObject2)
- renamed o_ifActiveObject -> o_ifEqualActiveObject2 as it acts only on _activeObject2
- renamed ScummEngine_v0::drawSentenceWord() -> ScummEngine_v0::getObjectName()
