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Add clamp() to DECORATE

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This commit is contained in:
Randy Heit 2016-02-25 14:31:37 -06:00
parent 7f57f68ce1
commit fd78686679
2 changed files with 24 additions and 0 deletions
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1
src/namedef.h
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@ -332,6 +332,7 @@ xx(Radius)
xx(ReactionTime)
xx(MeleeRange)
xx(Speed)
xx(Clamp)
// Various actor names which are used internally
xx(MapSpot)

23
src/thingdef/thingdef_exp.cpp
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@ -57,6 +57,7 @@ static FxExpression *ParseRandomPick(FScanner &sc, FName identifier, PClassActor
static FxExpression *ParseRandom2(FScanner &sc, PClassActor *cls);
static FxExpression *ParseAbs(FScanner &sc, PClassActor *cls);
static FxExpression *ParseMinMax(FScanner &sc, FName identifier, PClassActor *cls);
static FxExpression *ParseClamp(FScanner &sc, PClassActor *cls);
//
// ParseExpression
@ -381,6 +382,8 @@ static FxExpression *ParseExpression0 (FScanner &sc, PClassActor *cls)
case NAME_Min:
case NAME_Max:
return ParseMinMax(sc, identifier, cls);
case NAME_Clamp:
return ParseClamp(sc, cls);
case NAME_Abs:
return ParseAbs(sc, cls);
default:
@ -521,3 +524,23 @@ static FxExpression *ParseMinMax(FScanner &sc, FName identifier, PClassActor *cl
}
return new FxMinMax(list, identifier, sc);
}
static FxExpression *ParseClamp(FScanner &sc, PClassActor *cls)
{
FxExpression *src = ParseExpressionM(sc, cls);
sc.MustGetToken(',');
FxExpression *min = ParseExpressionM(sc, cls);
sc.MustGetToken(',');
FxExpression *max = ParseExpressionM(sc, cls);
sc.MustGetToken(')');
// Build clamp(a,x,y) as min(max(a,x),y)
TArray<FxExpression *> list(2);
list.Reserve(2);
list[0] = src;
list[1] = min;
FxExpression *maxexpr = new FxMinMax(list, NAME_Max, sc);
list[0] = maxexpr;
list[1] = max;
return new FxMinMax(list, NAME_Min, sc);
}