Im misunderstanding arrays.

Question

basic question:

How can I use arrays, to keep gameobjects, and then another array for the rigidbody.velocity of those gameobjects, and then use that second array to 'restore' the rigidbody velocity after returning from pause(doing rigidbody.sleep() then wakeup() )?

UPDATE:

ok here is where im at now.

Here is my new code:

void Update() {
guiText.text = ("testbool: ") + GameLogicScript.TestBool; // well time for debugging...

 // find player
 player = GameObject.FindGameObjectWithTag("Player");
 asteroids = GameObject.FindGameObjectsWithTag("Asteroid");
 savedAsteroidVelocity = new Vector3[asteroids.Length];
 
 // save player velocity and position if were pausing
 if(GameLogicScript.GamePaused)
 {
     // avoid nullref by checking that player is not dead or something...
     if(player != null)
     {
         // save player if we havent yet
         if(!saved)
         {
             savedPlayerVelocity = player.rigidbody.velocity;
             saved = true;
             loaded = false;
             player.rigidbody.Sleep(); // sleep my precious...
         }
                         
         // Save asteroids if we havent yet
         if(!asteroidSaved)
         {
             for(int i = 0; i < asteroids.Length; i++)
             {
                 asteroidSaved = true;
                 savedAsteroidVelocity[i] = asteroids[i].rigidbody.velocity;
                 asteroidLoaded = false;
                 asteroids[i].rigidbody.Sleep();
                 WrappingEnabled = false;
                 GameLogicScript.SwitchCamPause();
             }    
         }
     }
 }
 
 // if game not paused anymore load velocity's and position's
 if(!GameLogicScript.GamePaused)
 {
     // dont worry about player if were not out of wave 0
     if(GameLogicScript.wave > 0)
     {
         if(player != null)
         {
             if(!loaded)
             {
                 player.rigidbody.WakeUp();
                 player.rigidbody.velocity = savedPlayerVelocity;
                 //player.transform.position = savedPlayerPos;
                 saved = false;
                 loaded = true;
             }
         }
         
         if(!asteroidLoaded)
         {
             for(int i = 0; i < asteroids.Length; i++)
             {
                 asteroidLoaded = true;
                 asteroids[i].rigidbody.WakeUp();
                 asteroids[i].rigidbody.velocity = Vector3.left; //savedAsteroidVelocity[i];
                 //    savedAsteroidPosition[i] = asteroid.rigidbody.position;
                 asteroidSaved = false;
             }
         }
     }
     WrappingEnabled = true;
 }

}

Now what is going wrong this time, is the "asteroids" aka "enemyObjects" before... they are getting ALL the same velocity on resume...they dont take back the unique velocity they had before (random directions) and instead all float off in the exact same direction...

you know, reading this now that I posted it, seems like rechecking saved asteroid velocity every frame...does that reset the like...yaknow...velocity??? hmm

I have made serious progress thanks entirely to hijinxbassist! thanks a ton! Hopefully you can see some flaws in what im doing...

PS the asteroids array is gameobjects, and the savedasteroidvelocity array is vector3's

Answer 1

Best Answer

Answer by hijinxbassist · May 17, 2012 at 06:04 AM

Ok, so here is what the code will resemble (sry, i type unity-javascript)

 public var enemyObjects:Rigidbody[];
 public var savedAsteroidVelocity:Vector3[];
 public var timeScale:float;
 public var paused:boolean;
 
 function Start()
 {
     enemyObjects=GameObject.FindGameObjectsWithTag("Asteroid")as Rigidbody[];
     savedAsteroidVelocity=new Vector3[enemyObjects.Length];
 }
 function Update()
 {
     if(Input.GetButtonUp("p"))
     {
         if(paused)Time.timeScale=timeScale;
         else
         {
             timeScale=Time.timeScale;
             Time.timeScale=0;
         }
     }
     if(Time.timeScale==0)
     {
         if(!paused)
         {
             paused=true;
             for(var i:int=0;i<enemyObjects.Length;i++)
             {
                 savedAsteroidVelocity[i] = enemyObjects[i].velocity;
             }
         }
     }
     else if(paused)
     {
         paused=false;
         for(var i:int=0;i<enemyObjects.Length;i++)
         {
             enemyObjects[i].velocity=savedAsteroidVelocity[i];
         }
     }
 }

This will pause the game when the button "p" is released. If the game is already paused, it will reset the time scale. This code relies on

1) Game is paused using Time.timeScale

2) No new asteroids are added while playing (After Start() is called)

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MD_Reptile · May 17, 2012 at 11:47 AM 0

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@hijinxbassist Cool I'll check this out, thanks for all the help so far!

Update: okay everything is almost sort of working...haha

I have changed my script to resemble yours more, but im doing things probably wrong, because I dont rely on timescale to control my pause, and rather just the rigidbody.sleep() and wakeup() stuff, being that all the moving stuff is rigidbodies...

and what happens now, which is darn near what im going for...is all the rigidbodies DO stop moving, and then, when "resu$$anonymous$$g" the game, the rigidbodies actually ALL take a single direction of motion (velocity), they dont get their 'unique' motion back...

here let me update the first post with whats happening...

hijinxbassist · May 17, 2012 at 09:29 PM 0

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@$$anonymous$$DReptile Oh wow, i didnt think of that but it makes complete sense. You need to get their movement direction as well... Lemme think about it for a few, hopefully i can think of a reasonable solution.

hijinxbassist · May 17, 2012 at 10:03 PM 0

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@$$anonymous$$DReptile Ok, i think this may be what you need. Ins$$anonymous$$d of getting the velocity of the rigidbody, you can get the http://unity3d.com/support/documentation/ScriptReference/Rigidbody-angularVelocity.html>Angular velocity of the RB. You can literally just change rigidbody.velocity to rigidbody.angularVelocity

MD_Reptile · May 17, 2012 at 11:35 PM 0

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@hijinxbassist

I thought that maybe because EVERY update im re-assigning the arrays it could be a problem...like this:

asteroids = GameObject.FindGameObjectsWithTag("Asteroid");

savedAsteroidVelocity = new Vector3[asteroids.Length];

$$anonymous$$ore info:

tried changing the velocity to angularvelocity, and noticed they were all moving one direction....left...as in Vector3.left haha, I forgot to change that out when debugging, anyway when I set to to velocity, and tried just velocity, I put debug code to show what the saved bit was, always 0,0,0 with angularvelocity, tried velocity again...that way shows the saved velocity just after setting it, (with 5 asteroids on screen) all showing unique...apparently correct values...I will keep testing

using this "load" code...this is all putting out 0,0,0 as the "savedAsteroidVelocity[i]"...hmm...here is the code:

     // if game not paused anymore load velocity's
     if(!GameLogicScript.GamePaused)
     {
         // dont worry about player if were not out of wave 0
         if(GameLogicScript.wave > 0)
         {
             if(player != null)
             {
                 if(!loaded)
                 {
                     player.rigidbody.WakeUp();
                     player.rigidbody.velocity = savedPlayerVelocity;
                     //player.transform.position = savedPlayerPos; nvm this...
                     saved = false;
                     loaded = true;
                 }
             }
             
             if(!asteroidLoaded)
             {
                 for(int i = 0; i < asteroids.Length; i++)
                 {
                     asteroidLoaded = true;
                     asteroids[i].rigidbody.WakeUp();
                     asteroids[i].rigidbody.velocity = savedAsteroidVelocity[i];
                     Debug.Log("lv: " + savedAsteroidVelocity[i]);
                     //    savedAsteroidPosition[i] = asteroid.rigidbody.position;
                     asteroidSaved = false;
                 }
             }
         }
         //WrappingEnabled = true; ignore this
     }
 }

}

Crazy question... does the logic on "i" mean, it starts with savedAsteroidVelocity[0] or [1]? wouldnt that be a problem if it did?

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXx New update:

Awwww I figured it out...worked flawlessly...I was doing the part where it finds asteroids, and then the next line, was indeed resetting the whole deal every frame, even like a frame or two after saving... casuing it to stay zero for velocity...

this part:

asteroids = GameObject.FindGameObjectsWithTag("Asteroid"); savedAsteroidVelocity = new Vector3[asteroids.Length];

had to use a bool like, foundStuff to make sure it only looked once...once per pause anyway :) works like a charm! ill mark your answer as correct, with some adjustments on my own logic anyway

Thanks a ton, you were extremely helpful!

hijinxbassist · May 18, 2012 at 04:00 AM 0

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excellent, glad we got it resolved. Glad to be of help, im sure our paths will cross again one way or another. For now, Cheers : )

Im misunderstanding arrays.

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