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- fixed: CreateDamageFunction needs to return NULL for a damage value of 0 to preserve the collision detection handling of non-damaging actors.

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SVN r3920 (scripting)
This commit is contained in:
Christoph Oelckers 2012-10-28 06:56:56 +00:00
parent 6e88529324
commit b630410372
2 changed files with 17 additions and 8 deletions
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3
src/p_mobj.cpp
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@ -3410,7 +3410,8 @@ void AActor::Tick ()
// won't hurt anything. Don't do this if damage is 0! That way, you can
// still have missiles that go straight up and down through actors without
// damaging anything.
if ((flags & MF_MISSILE) && (velx|vely) == 0 && Damage != 0)
// (for backwards compatibility this must check for lack of damage function, not for zero damage!)
if ((flags & MF_MISSILE) && (velx|vely) == 0 && Damage != NULL)
{
velx = 1;
}

22
src/thingdef/thingdef.cpp
View file

@ -446,11 +446,19 @@ void LoadActors ()
VMScriptFunction *CreateDamageFunction(int dmg)
{
VMFunctionBuilder build;
build.Registers[REGT_POINTER].Get(1); // The self pointer
build.EmitRetInt(0, false, dmg);
build.EmitRetInt(1, true, 0);
VMScriptFunction *sfunc = build.MakeFunction();
sfunc->NumArgs = 1;
return sfunc;
if (dmg == 0)
{
// For zero damage, do not create a function so that the special collision detection case still works as before.
return NULL;
}
else
{
VMFunctionBuilder build;
build.Registers[REGT_POINTER].Get(1); // The self pointer
build.EmitRetInt(0, false, dmg);
build.EmitRetInt(1, true, 0);
VMScriptFunction *sfunc = build.MakeFunction();
sfunc->NumArgs = 1;
return sfunc;
}
}