Local properties for scenery models ?

[TheEagle]

Well, actually I wanted them to both rotate left and right and move up and down. Could this also be done ?
But, if it were implemented in the core FG, it wouldn't work with older versions which just what I don't want.

[wkitty42]

Well, actually I wanted them to both rotate left and right and move up and down. Could this also be done ?

i'm not sure of the POV here... when you say "rotate left and right" do you mean their headings or their pitch? or are you talking about roll?

But, if it were implemented in the core FG, it wouldn't work with older versions which just what I don't want.

i don't know why you say that... if it is done properly, it won't affect anything that doesn't have the specific code for this feature... those old ones would just sit there like they do now... only the newer ones would react like this... there's nothing wrong with this, either... it is like the AI craft... some of them have lights and others do not... that gives someone the chance to update those without lights and modernize them...

[benih]

Can you see boat movements from a plane?
It is this here a Special usecase?

[merspieler]

maybe not a plane but if you fly helicopter, you can... there are some helipads in proximity to ports.

[TheEagle]

With "left to right" I mean change the model's roll.

[SurferTim]

I can see where this would be a good effect. I fly amphibians (Twin Otter and Grand Caravan) now and then.

[Fahim Dalvi]

Perhaps you can use https://wiki.flightgear.org/Howto:Animate_models#Expressions to combine your animation property with the position of the boat (each boat will have a unique position, and thus depending on the expression, each can have a slightly different rotation/animation params). I think you can even go a step further and just base the rotation on some already existing time property, instead of having nasal create another property for you. This way, you expression will be a combination of (maybe "sin"/"cos" expression) time + position.

Hope this helps!

[benih]

Somewhere at the canarian islands i have seen a jetski moving around.
How was that achieved? Maybe this helps too

[TheEagle]

@Fahim yeah, but how can I get the position of each boat inside the animation file ? I repeat - they all share the same property tree.
@benih: I will have a look - but a jetski is normally alone, so it doesn't matter that it does it movement based on the global property tree.

[TheEagle]

@benih: I can't find a jetski in the scenery database - can you give me the coordinates ?

[Fahim Dalvi]

@Fahim yeah, but how can I get the position of each boat inside the animation file ? I repeat - they all share the same property tree.

Ah yes, I just assumed there would be a local position property per object, but I guess that's not true!

[TheEagle]

Well, if there were, all this thread wouldn't exist …

[wkitty42]

Somewhere at the canarian islands i have seen a jetski moving around.

that was probably one of the small boats motoring around... especially if it had a rooster tail or wake behind it... they're just (XML IIRC) scripted routes and generally just go in (largish) circles... there are numerous of them around the southern ocean area of England along the coast...

[TheEagle]

@wkitty yep, they are moving in circles based on /sim/time/elapsed.

[benih]

Eagle: No idea where that was. But i remember it was a small coast airport with a gokart race circle nearby.