nvm, I've found a way around it by using ontouch

@unknownuser said: By the way, C.Phillips, mind explaning that script? I wouldn't mind figuring out how it works What's g? ...all I can get so far is that gas is 100, if gas is smaller than 0, then the motor stops, and when up is pressed, g is equal to gas, which is equal to one less than g, thus lowering the value by 1 each frame up is>0 (pressed). But can you just use a letter as a variable? It doesn' seem to work for me... Yes "g" is a temporary variable. It could have been "gas" or (almost) anything. I tested the code and it seems to work as expected. How does it not work for you?

Destroying something isnt the hard part. The hard part is getting it back again when the simulation resets. But I'll look into it.

Interesting developpement, I like the way you manage flight parameters indicators have a look on this thread , could be useful :http://www.sketchucation.com/forums/scf/viewtopic.php?f=15&t=16632&p=131285&hilit=+dimension#p131227 MALAISE.

Thanks Friends, for thoses hints. @ Pilou, I was led to such a solution MALAISE

@malaise said: Hi =Physicsguy= Color sensor's idea is very interesting. I had suggested a similar idea using a mechanical sensor (switch). The question is: how to read this sensor information and link it to drive motor, hinge.... ? MALAISE Mechanical sensors are now possible if you use an object with an onTouch field.

The code in the onTick field is executed every rate frames. If rate is 0 then every frame.

make all parts magnetic, put a non-collision static magnet with strength of 1000 or higher in the middle, press play.

@cphillips said: I just typed that off the top of my head and made a few errors. Here is a correct version: > pos=getVar("pos")+(key("up")*0.02)+(key("down")*-0.02);if(pos>1.0);pos=1.0;elsif(pos<0.0);pos=0.0;end;setVar("pos",pos);pos Thanks. that works. Ive just tried it in a servo and a motor aswell. Works on those too.

Thanks

please cast your minds back to this: http://sketchup.google.com/3dwarehouse/details?mid=a507050360e487cd6227cba038bf7c95&prevstart=0 i think this is what you are talking about, it's a bike that doesn't use any gyros or anything, but relies on an extremely low centre of gravity

Magnetic Deflecting Armor

Sorry, I never did get it to work right. I have another idea I want to try out soon.

@unknownuser said: I'd been trying to do something similar, to keep something flying, but to no avail (yet) I might have a go at that. I have idea for how to do it

Not now but perhaps in a future version.

If you did a playsound in onTick or onTouch and didnt set the rate to something a lot higher that 0 it might crash. If that wasnt it maybe it was a bad wav.

we know you're not entering, why are you even posting here???

@cphillips said: Gears can be very finicky. Make sure you are clicking on the joint and not the object+joint group. Wheel and door work fine for me. Make sure you have a floor or some other object when you are trying to create something. They need an object to connect to. If that isn't the problem post a model and I will take a look. Thanks. Its working now.

compared to most its not great but it looks better than most other examples

I don't think SP is particularly hard to understand, but the fragmentation of the ad-hoc documentation is a stumbling block for most people.