koobas.hobune.stream
How to make a random occurrences using a timer?
The game I'm making is mostly about randomization, you enter the scene, a random texture appears on an object, here is the code but it changes every second, I want it to change every time you enter the scene, if I get rid of yield and press play, unity goes grey and crashes.
#pragma strict
var textures: Texture2D[]; // assign some textures in the Inspector
function Start (){
while (true){
renderer.material.SetTexture ("_MainTex", textures[Random.Range(0, textures.Length)]);
yield WaitForSeconds(2.0);
}
}
I also want it so when you enter a scene a random number is chosen and then it begins to count down to 0 before ending the game. When I press play the random number is placed, then it goes straight to 0 instead of counting down from said number. I hope this is not too much to ask i'm fairly new.
#pragma strict
var timer : int;
function Start ()
{
timer = Random.Range(10.0, 20.0);
}
function Update ()
{
timer -= Time.deltaTime;
Debug.Log(timer);
if(timer <=0)
{
timer = 0;
}
}
Problem One: Don't use while loops, they've been known to crash Unity hard.
Problem Two: For the random events try this...
var nextTime: float;
var modifier : float;
function Start()
{
nextTime = 0.0;
}
function Update()
{
//Get a random value
modifier = Random.Range(10.0,20.0);
//Set nextTime equal to current run time plus modifier
nextTime = Time.time + modifier;
//Check if current system time is greater than nextTime
if(Time.time > nextTime)
{
//DO EVENT
}
}
This seems to make both variables randomize any 2 digit number, it's hard to deter$$anonymous$$e exactly what its doing, it seems to be counting up and randomizing at the same time over the 10,20 limit
To help solve the timer going straight to 0, start by making it a float instead of an int.
To help with the texture issue, simply remove the "while(true)" part. With it there, you are attempting to change the texture every frame, and you'll never leave the start method!
Thanks for the help, it does count down now but the only problem I have now it that it has 8 tenths(0.00000000) ins$$anonymous$$d of just a whole number, and the counter keeps going into the $$anonymous$$us when I made the if statement for 'timer <=0' when it does this the counter counts down the last 3 tenths, pretty strange. http://puu.sh/bND5r/8dd7d4d049.png
Yeah, that's floats for you, never quite what you want them to be.
A common solution for this is
timer = $$anonymous$$athf.Round(timer * 10) / 10;
This will give you one decimal points worth of precision, but will also keep your float from being something silly like 0.0000004
In addition, if you don't want the user to see the decimal places, you can cast it back to an int when you display it!
while (true)
That's an infinite loop. It never ends.
If your code runs asynchronously (such as a coroutine), that's okay because the program will be able to run while the coroutine is paused.
When you delete all yield statements in a function, it's no longer a coroutine. The loop was always infinite; the only difference now is that it keeps control of the main thread, too.
Infinite loop + blocking main thread = your program stops running.
