OnFixedUpdate and staging

[Ippo]

Hello everyone,

I am noticing something very weird on my PartModule

From my logs, it appears that the OnFixedUpdate method is only called when the part it is attached to is in the active stage.

Is it by design? Or am I doing something wrong?

[Faark]

You probably want MonoBehaviour.FixedUpdate (and other messages listed for MonoBehaviours). OnFixedUpdate is something KSP specific and because of that probably behaves weird

[Ippo]

The problem is that PartModules don't have a FixedUpdate method, so of course I can't use it.

[Faark]

Oh sry, you didn't knew. KSP uses Unity and Unity does stuff the Unity way. Their messages don't require you to "overwrite" anything. The class just needs to have a method with such a name and signature. It doesn't even have to be public. Unity will call it via evil magic you probably don't want to hear about. Check out some other mods in case you want some examples. Even usual non-part KSPAddons are MonoBehaviours, just like PartModule is.

[Ippo]

OH. MY. GOD.

Like, seriously!? This really confuses me a lot, but it works

Well, of course now I get a huge stream of NRE because I have to initialize stuff, but as soon as I launch and they get set, it all starts working like a charm.

I'm a little confused on why this works (I guess that Unity actually checks via reflection if I defined a FixedUpdate() ), but nontheless, it does, and that's all I care about right now

You, sir, just saved my mod. Here, have some rep

[stupid_chris]

Yes, it uses Reflection. You just need to do "private void FixedUpdate()" and the method will be called every physics frame. Actually it could be any member access modifier and it would work. This works for every class who inherits MonoBehaviour in some way, and PartModule does.

If you want the full list of methods you can define this way, you can find them here under "Messages": http://docs.unity3d.com/ScriptReference/MonoBehaviour.html