www.iforce2d.net

Hello, I need help!
I am loaded rube scene in world and create body 'rocket'... but when I use method ApplyForce, object is goes on. If I exchange to ApplyImpulse, rocket is soars. Could you ask me, why ApplyForce dont work?

This is link to test project http://winafterwin.com/test/rockets/

The box2d forums might be a better place for this: http://box2d.org/forum/

How does that test project work, do I need to push a key or something? I'm not sure what you mean by 'goes on', and why that is bad...

Sorry, this is my inadvertence. After every step I clear all forces "ClearForces()", thats why object dont move...

Iforce, could you tell me, why is rocket behaves poorly when I load in rube world? I had а simulator rocket http://winafterwin.com/test/rockets2/, you can control rocket by arrow keys. But, when I load rocket in Rube world, she behaves like a feather... I am check mass of rocket and it is the same and forces same.

this is link to rocket rube:
http://winafterwin.com/test/rockets/

Hey that looks pretty cool! Really looks like a rocket

I don't know about your question though... are you using the same time step length (editor uses 60fps by default). I'm not exactly sure what you mean by 'like a feather' - I imagine something fluttering and tumbling while it falls, but probably you mean something different.

After some tests I guess that this is because of new version Box2d 2.1 ... The first version rocket was created by Box2d 2.0, but I dont know, why such a difference

http://winafterwin.com/test/rockets2/ This is on 2.1 version and I reduced the forces and torque of 10, but rocket not realistic

It seems like the thrust is always pushing the rocket upwards, when it should be going in the opposite direction to the smoke particles, right? As far as I can tell, the particles are always going in the right direction, so how about just using the reverse of that direction for the thrust force.

Problem solved by method ClearForces() before each step. Thanks for debate Iforce