Help with movement script (445955)

Scripting
1

I’m trying to make an object in my scene move around freely. So I want to randomise when it will switch directions and speeds. But I’m having trouble with the code. I don’t know how to randomize the code. And I would also like to have the object take random pauses and just stand still. How do I modify this code to do all that I want to do?

var stuff : Transform; // Needs rigidbody attached with a collider
var vel : Vector3; // Holds the random velocity
var switchDirection : float = 3;
var curTime : float = 0;
var RandomVariable : int;
 RandomVariable = Random.Range (0,20);

function SetVel()
{
  if (Random.value > .5) {
    vel.x = 10 * 10 * Random.value;
  }
  else {
    vel.x = -10 * 10 * Random.value;
  }
  if (Random.value > .5) {
    vel.z = 10 * 10 * Random.value;
  }
  else {
    vel.z = -10 * 10 * Random.value;
  }
}

function Update()
{
  if (curTime < switchDirection ) {
    curTime += 1 * Time.deltaTime;
  }
  else {
    SetVel();
    if (RandomVariable > .5) {
  switchDirection += Random.value;
}
else {
  switchDirection -= Random.value;
}
    if (switchDirection < 1) {
      switchDirection = 1 + Random.value;
    }
    curTime = 0;
  }
}

function FixedUpdate()
{
  stuff.rigidbody.velocity = vel;
}

Help would be greatly appreciated!

2

OK, I get what you are trying to do, though your a bit mixed up on timers. (and random values… ;))

Put this script ON the object you want to move around, don’t reference it.

var vel : Vector3; // Holds the random velocity
var switchDirection : float = 3;
var nextTime : float = 0;

function Start(){
	if(!rigidbody) gameObject.AddComponent(Rigidbody);
	newVelocity;
}

function Update(){
	if(Time.time > nextTime) newVelocity();
	
	rigidbody.velocity=vel;
}

function newVelocity()
{
	vel=Vector3(Random.value * 2 - 1, 0, Random.value * 2 -1);
	vel *= 100;
	nextTime=Time.time + switchDirection;
}
3

Would this replace the entire code?

I get this error when I try to run the game

4

Nvrmind, fixed the problem. But how do I get the object to make random pauses in its movement?
Or more clearly put, make it pause and rotate its trajectory angle when it’s changing directions. (ie. Walk, pause/rotate,walk,etc.)

5

Pretty simple, just add it to your newVelocity statement. check a Random value against the amount you want it to stay and if it is, change the velocity to zero and set the next time to wait some.

function newVelocity()
{
	if(Random.value < 0.5){
		nextTime=Time.time + Random.value * 5.0;
		vel=Vector3.zero;
		return;
	}
	vel=Vector3(Random.value * 2 - 1, 0, Random.value * 2 -1);
	vel *= 100;
	nextTime=Time.time + switchDirection;
}
6

Thanks a lot BigMisterB!
Also, it only changes directions/speed every five seconds or so. How do I make that number more varied?
I know, I’m asking quite a lot.

7 
function newVelocity()
{
	if(Random.value < 0.5){
		nextTime=Time.time + Random.value * 5.0;
		vel=Vector3.zero;
		return;
	}
	vel=Vector3(Random.value * 2 - 1, 0, Random.value * 2 -1);
	vel *= 100;
	[COLOR="red"]nextTime=Time.time + Random.value * 5.0;[/COLOR]
}

/poke… you must read this stuff… that was very simple… :wink:

8

I’m sorry haha. I’ve been coding in Game Maker Language(GML) for years now and have just started on Unity so it’s a little confusing.

This code I’m trying to work on is basically an NPC movement script. How do I make them face the ovbject they are moving while have them rotate to the desired direction instead of immediate facing?

9 
function newVelocity()
{
	if(Random.value < 0.5){
		nextTime=Time.time + Random.value * 5.0;
		vel=Vector3.zero;
		return;
	}
	vel=Vector3(Random.value * 2 - 1, 0, Random.value * 2 -1);
	vel *= 100;
	nextTime=Time.time + Random.value * 5.0;
	[COLOR="red"]transform.LookAt(transform.position + vel);[/COLOR]
}

Not as simple, but you do need to go through some basic tutorials about Unity. :wink:

10

No joke haha. It’s kind of emberrassing. I’m a modeler, though. Not much of a programmer

ALSO (i know, right) This last thing and I shall most likely be happy. How do I smooth out the angling? When the object switches directions, it snaps ita angle towards that direction. How do I make it gently ease from direction A to direction B?

11

You may be able to find some answers in this thread: http://forum.unity3d.com/threads/45649-slow-rotation-from-point-to-point