Rocket script

i have constructed a spaceship, with particle scripts and texturing, but the part that has been eluding me is i cannot, for some reason, get a script to make it shoot straight up, and then fall back down, not flying , just straight up and down. if someone could post a script that could help me, i would appreciate it.


Attempt #1

default
{
state_entry()
{
llSetStatus(STATUS_PHYSICS, TRUE);
llSetStatus(STATUS_ROTATE_X | STATUS_ROTATE_Y | STATUS_ROTATE_Z, FALSE);
llSensorRepeat("", llGetOwner(), AGENT, 255, PI, .1);
}
sensor(integer iNum)
{
vector pos = llDetectedPos(0) - <0,0,20000>;
llMoveToTarget(pos, 0.1);
}
}


i've done it also using llMoveToTarget, but it doesnt want to work when i'm sitting inside it.

Straight up, then straight down? No drifting?

Going up and down with drifting is easier. If you don't want it to drift then you'll need to use llMoveToTarget();

There is a bug/feature in llMoveToTarget that stops it from moving to any target more than a set distance away. I think it's 50 meters but I haven't measured it accurately.


Anyway if you set up a loop you can fly straight up, but it's not as realistic as using llSetForce(); if you ask me.


I've really got to reccomend against using a sensor for this, also.

integer godown = FALSE;


default
{
   state_entry()
   {
      llSetStatus(STATUS_PHYSICS, TRUE);
      llSetStatus(STATUS_ROTATE_X | STATUS_ROTATE_Y | STATUS_ROTATE_Z, FALSE);
   }

   touch_start(integer num_detected)
   {
      llSetTimerEvent(1);
   }

   timer()
   {
      vector currentpos = llGetPos();
      if(!godown) currentpos.z += 10;
      else currentpos.z -= 10;
      llMoveToTarget(currentpos, 2);
      if(currentpos.z > 500) godown = TRUE;
      if((currentpos.z < (llGround() + 10)) && godown) llStopMoveToTarget();
   }
 }



 

Phew. That should work for ya, unless I made some syntax errors. If nothing else it should give you an idea of how I might do it, if I wasn't going to use llSetForce();

there seems to be a problem in the script. A type mismatch in this line:

if((currentpos.z < (llGround() + 10)) && godown) llStopMoveToTarget();

And also, you said that there is a way to use llSetForce, i have already attempted using this, and with no success, but i may have had scripting problems, so if you could consider that, i would appreciate.

Try something like this, it is along the lines of what I used in my rocket ship:

float mass = llGetMass();
float gravityplus = 15.8;
llSetForce(mass * <0, 0, gravityplus>, FALSE);

Just make sure to turn off the force or you will go off world.

You could just apply an upward force for a set ammount of time, then take the force away and the rocket will fall.

eg:

default
{
	
	state_entry()
	{
		llSetStatus(STATUS_PHYSICS, TRUE); 
		llSetStatus(STATUS_ROTATE_X | STATUS_ROTATE_Y | STATUS_ROTATE_Z, FALSE); 
	}
	
	touch_start(integer num_detected)
	{
		llSetForce(<0,0,20>, FALSE);
		llSetTimerEvent(30);
	}
	
	timer()
	{
		llSetForce(<0,0,0>,FALSE);
		llSetTimerEvent(0);
	}
}