Smooth rotation - question

[newbi]

Maybe my question is silly but can anyone tell me how to do smooth rotation of node ?
I have node ( ship ) and I face it to direction where it has to be moved

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vector3df currentPos = Node->getPosition();

vector3df angle = currentPos - newPos;

Node->setRotation(angle.getHorizontalAngle());

This code rotate node into good direction but node jumps, teleports. I hope you know what I mean and forgive my crooked English

And one more question, how can I make ships going in formation, not going through itself

[FrSl]

You need to code a smooth rotation yourself i think, something like this:

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while(device->run()) //main loop
{
   rotationDone = false;
   while( ship->getRotation()->getX() < angleYouWant && !rotationDone)
   {
      core::vector3df smoothRotation = core::vector3df(0.01*3.14, 0, 0);
      ship->setRotation(ship->getRotation() + smoothRotation); 
      rotationDone = true;
   }
}

For the second formation part i would use a array with a couple of vectors(positions) and set the ships in place with a for loop like this:

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k=0;
for (int x=0;x<=ships;x++)
{   
   ship[x]->setPosition(shipPositions[k]);
   k++;
   if (k > 2)
      k = 0;
}

Good luck with it!

[JP]

What's best is to do time based movement, so it's independent of the frame rate. To do that you work out the time elapsed since the last frame was rendered, and then you rotate the ship based on that amount, using a distance = speed * time approach. So each frame you check the ship to see if it currenly wants to rotate and if so you update its rotation using the elapsed time since the last frame. When your ship wants to rotate it simply sets its wantToRotate flag to true and then sets its desired rotation, so then you can tell when you've rotated far enough.

Hope that makes sense!

[newbi]

Ok, I manage to do rotation and some kind of formation movement. Here comes another problem, explosion. I made nice looking particle box emitter, and I add delete animator to it. What should I do if I want explosion slowly disappearing

[JP]

I nicked something of dhenton9000's from his game which was a load of png images of an explosion at various stages which can be loaded into irrlicht and displayed as an animation, looks quite nice and may well be suitable for you too. I think he links to the game in his signature, or you can search through the memberlist for him. I'd upload it for you myself but i feel his knowledge of your using it might be better, i'm not even sure if he knows i nicked it for my project either But he did get an acknowledgement in my dissertation for it

[JP]

Here's the thread he made it available in when i got it:
http://irrlicht.sourceforge.net/phpBB2/ ... sion#64280